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![Shobhit Kumar](/assets/img/avatar_default.png)
Use the CRC PWM device in intel_panel.c and add new MIPI backlight specififc callbacks v2: Modify to use pwm_config callback v3: Addressed Jani's comments - Renamed all function as pwm_* instead of vlv_* - Call intel_panel_actually_set_backlight in enable function - Return -ENODEV in case pwm_get fails - in case pwm_config error return error cdoe from pwm_config - Cleanup pwm in intel_panel_destroy_backlight v4: Removed unused #defines and initialized backlight with INVALID_PIPE (Ville) CC: Samuel Ortiz <sameo@linux.intel.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Alexandre Courbot <gnurou@gmail.com> Cc: Thierry Reding <thierry.reding@gmail.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Tested-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
1600 lines
47 KiB
C
1600 lines
47 KiB
C
/*
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* Copyright © 2006-2010 Intel Corporation
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* Copyright (c) 2006 Dave Airlie <airlied@linux.ie>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Eric Anholt <eric@anholt.net>
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* Dave Airlie <airlied@linux.ie>
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* Jesse Barnes <jesse.barnes@intel.com>
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* Chris Wilson <chris@chris-wilson.co.uk>
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/kernel.h>
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#include <linux/moduleparam.h>
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#include <linux/pwm.h>
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#include "intel_drv.h"
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#define CRC_PMIC_PWM_PERIOD_NS 21333
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void
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intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode,
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struct drm_display_mode *adjusted_mode)
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{
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drm_mode_copy(adjusted_mode, fixed_mode);
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drm_mode_set_crtcinfo(adjusted_mode, 0);
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}
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/**
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* intel_find_panel_downclock - find the reduced downclock for LVDS in EDID
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* @dev: drm device
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* @fixed_mode : panel native mode
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* @connector: LVDS/eDP connector
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*
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* Return downclock_avail
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* Find the reduced downclock for LVDS/eDP in EDID.
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*/
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struct drm_display_mode *
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intel_find_panel_downclock(struct drm_device *dev,
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struct drm_display_mode *fixed_mode,
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struct drm_connector *connector)
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{
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struct drm_display_mode *scan, *tmp_mode;
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int temp_downclock;
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temp_downclock = fixed_mode->clock;
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tmp_mode = NULL;
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list_for_each_entry(scan, &connector->probed_modes, head) {
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/*
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* If one mode has the same resolution with the fixed_panel
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* mode while they have the different refresh rate, it means
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* that the reduced downclock is found. In such
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* case we can set the different FPx0/1 to dynamically select
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* between low and high frequency.
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*/
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if (scan->hdisplay == fixed_mode->hdisplay &&
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scan->hsync_start == fixed_mode->hsync_start &&
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scan->hsync_end == fixed_mode->hsync_end &&
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scan->htotal == fixed_mode->htotal &&
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scan->vdisplay == fixed_mode->vdisplay &&
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scan->vsync_start == fixed_mode->vsync_start &&
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scan->vsync_end == fixed_mode->vsync_end &&
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scan->vtotal == fixed_mode->vtotal) {
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if (scan->clock < temp_downclock) {
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/*
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* The downclock is already found. But we
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* expect to find the lower downclock.
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*/
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temp_downclock = scan->clock;
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tmp_mode = scan;
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}
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}
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}
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if (temp_downclock < fixed_mode->clock)
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return drm_mode_duplicate(dev, tmp_mode);
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else
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return NULL;
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}
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/* adjusted_mode has been preset to be the panel's fixed mode */
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void
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intel_pch_panel_fitting(struct intel_crtc *intel_crtc,
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struct intel_crtc_state *pipe_config,
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int fitting_mode)
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{
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struct drm_display_mode *adjusted_mode;
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int x, y, width, height;
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adjusted_mode = &pipe_config->base.adjusted_mode;
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x = y = width = height = 0;
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/* Native modes don't need fitting */
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if (adjusted_mode->hdisplay == pipe_config->pipe_src_w &&
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adjusted_mode->vdisplay == pipe_config->pipe_src_h)
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goto done;
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switch (fitting_mode) {
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case DRM_MODE_SCALE_CENTER:
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width = pipe_config->pipe_src_w;
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height = pipe_config->pipe_src_h;
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x = (adjusted_mode->hdisplay - width + 1)/2;
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y = (adjusted_mode->vdisplay - height + 1)/2;
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break;
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case DRM_MODE_SCALE_ASPECT:
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/* Scale but preserve the aspect ratio */
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{
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u32 scaled_width = adjusted_mode->hdisplay
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* pipe_config->pipe_src_h;
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u32 scaled_height = pipe_config->pipe_src_w
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* adjusted_mode->vdisplay;
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if (scaled_width > scaled_height) { /* pillar */
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width = scaled_height / pipe_config->pipe_src_h;
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if (width & 1)
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width++;
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x = (adjusted_mode->hdisplay - width + 1) / 2;
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y = 0;
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height = adjusted_mode->vdisplay;
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} else if (scaled_width < scaled_height) { /* letter */
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height = scaled_width / pipe_config->pipe_src_w;
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if (height & 1)
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height++;
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y = (adjusted_mode->vdisplay - height + 1) / 2;
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x = 0;
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width = adjusted_mode->hdisplay;
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} else {
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x = y = 0;
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width = adjusted_mode->hdisplay;
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height = adjusted_mode->vdisplay;
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}
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}
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break;
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case DRM_MODE_SCALE_FULLSCREEN:
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x = y = 0;
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width = adjusted_mode->hdisplay;
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height = adjusted_mode->vdisplay;
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break;
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default:
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WARN(1, "bad panel fit mode: %d\n", fitting_mode);
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return;
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}
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done:
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pipe_config->pch_pfit.pos = (x << 16) | y;
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pipe_config->pch_pfit.size = (width << 16) | height;
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pipe_config->pch_pfit.enabled = pipe_config->pch_pfit.size != 0;
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}
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static void
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centre_horizontally(struct drm_display_mode *mode,
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int width)
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{
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u32 border, sync_pos, blank_width, sync_width;
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/* keep the hsync and hblank widths constant */
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sync_width = mode->crtc_hsync_end - mode->crtc_hsync_start;
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blank_width = mode->crtc_hblank_end - mode->crtc_hblank_start;
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sync_pos = (blank_width - sync_width + 1) / 2;
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border = (mode->hdisplay - width + 1) / 2;
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border += border & 1; /* make the border even */
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mode->crtc_hdisplay = width;
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mode->crtc_hblank_start = width + border;
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mode->crtc_hblank_end = mode->crtc_hblank_start + blank_width;
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mode->crtc_hsync_start = mode->crtc_hblank_start + sync_pos;
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mode->crtc_hsync_end = mode->crtc_hsync_start + sync_width;
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}
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static void
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centre_vertically(struct drm_display_mode *mode,
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int height)
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{
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u32 border, sync_pos, blank_width, sync_width;
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/* keep the vsync and vblank widths constant */
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sync_width = mode->crtc_vsync_end - mode->crtc_vsync_start;
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blank_width = mode->crtc_vblank_end - mode->crtc_vblank_start;
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sync_pos = (blank_width - sync_width + 1) / 2;
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border = (mode->vdisplay - height + 1) / 2;
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mode->crtc_vdisplay = height;
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mode->crtc_vblank_start = height + border;
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mode->crtc_vblank_end = mode->crtc_vblank_start + blank_width;
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mode->crtc_vsync_start = mode->crtc_vblank_start + sync_pos;
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mode->crtc_vsync_end = mode->crtc_vsync_start + sync_width;
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}
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static inline u32 panel_fitter_scaling(u32 source, u32 target)
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{
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/*
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* Floating point operation is not supported. So the FACTOR
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* is defined, which can avoid the floating point computation
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* when calculating the panel ratio.
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*/
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#define ACCURACY 12
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#define FACTOR (1 << ACCURACY)
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u32 ratio = source * FACTOR / target;
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return (FACTOR * ratio + FACTOR/2) / FACTOR;
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}
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static void i965_scale_aspect(struct intel_crtc_state *pipe_config,
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u32 *pfit_control)
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{
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struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
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u32 scaled_width = adjusted_mode->hdisplay *
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pipe_config->pipe_src_h;
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u32 scaled_height = pipe_config->pipe_src_w *
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adjusted_mode->vdisplay;
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/* 965+ is easy, it does everything in hw */
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if (scaled_width > scaled_height)
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*pfit_control |= PFIT_ENABLE |
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PFIT_SCALING_PILLAR;
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else if (scaled_width < scaled_height)
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*pfit_control |= PFIT_ENABLE |
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PFIT_SCALING_LETTER;
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else if (adjusted_mode->hdisplay != pipe_config->pipe_src_w)
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*pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO;
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}
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static void i9xx_scale_aspect(struct intel_crtc_state *pipe_config,
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u32 *pfit_control, u32 *pfit_pgm_ratios,
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u32 *border)
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{
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struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
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u32 scaled_width = adjusted_mode->hdisplay *
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pipe_config->pipe_src_h;
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u32 scaled_height = pipe_config->pipe_src_w *
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adjusted_mode->vdisplay;
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u32 bits;
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/*
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* For earlier chips we have to calculate the scaling
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* ratio by hand and program it into the
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* PFIT_PGM_RATIO register
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*/
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if (scaled_width > scaled_height) { /* pillar */
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centre_horizontally(adjusted_mode,
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scaled_height /
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pipe_config->pipe_src_h);
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*border = LVDS_BORDER_ENABLE;
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if (pipe_config->pipe_src_h != adjusted_mode->vdisplay) {
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bits = panel_fitter_scaling(pipe_config->pipe_src_h,
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adjusted_mode->vdisplay);
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*pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
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bits << PFIT_VERT_SCALE_SHIFT);
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*pfit_control |= (PFIT_ENABLE |
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VERT_INTERP_BILINEAR |
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HORIZ_INTERP_BILINEAR);
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}
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} else if (scaled_width < scaled_height) { /* letter */
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centre_vertically(adjusted_mode,
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scaled_width /
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pipe_config->pipe_src_w);
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*border = LVDS_BORDER_ENABLE;
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if (pipe_config->pipe_src_w != adjusted_mode->hdisplay) {
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bits = panel_fitter_scaling(pipe_config->pipe_src_w,
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adjusted_mode->hdisplay);
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*pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
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bits << PFIT_VERT_SCALE_SHIFT);
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*pfit_control |= (PFIT_ENABLE |
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VERT_INTERP_BILINEAR |
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HORIZ_INTERP_BILINEAR);
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}
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} else {
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/* Aspects match, Let hw scale both directions */
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*pfit_control |= (PFIT_ENABLE |
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VERT_AUTO_SCALE | HORIZ_AUTO_SCALE |
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VERT_INTERP_BILINEAR |
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HORIZ_INTERP_BILINEAR);
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}
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}
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void intel_gmch_panel_fitting(struct intel_crtc *intel_crtc,
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struct intel_crtc_state *pipe_config,
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int fitting_mode)
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{
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struct drm_device *dev = intel_crtc->base.dev;
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u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0;
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struct drm_display_mode *adjusted_mode;
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adjusted_mode = &pipe_config->base.adjusted_mode;
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/* Native modes don't need fitting */
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if (adjusted_mode->hdisplay == pipe_config->pipe_src_w &&
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adjusted_mode->vdisplay == pipe_config->pipe_src_h)
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goto out;
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switch (fitting_mode) {
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case DRM_MODE_SCALE_CENTER:
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/*
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* For centered modes, we have to calculate border widths &
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* heights and modify the values programmed into the CRTC.
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*/
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centre_horizontally(adjusted_mode, pipe_config->pipe_src_w);
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centre_vertically(adjusted_mode, pipe_config->pipe_src_h);
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border = LVDS_BORDER_ENABLE;
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break;
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case DRM_MODE_SCALE_ASPECT:
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/* Scale but preserve the aspect ratio */
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if (INTEL_INFO(dev)->gen >= 4)
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i965_scale_aspect(pipe_config, &pfit_control);
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else
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i9xx_scale_aspect(pipe_config, &pfit_control,
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&pfit_pgm_ratios, &border);
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break;
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case DRM_MODE_SCALE_FULLSCREEN:
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/*
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* Full scaling, even if it changes the aspect ratio.
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* Fortunately this is all done for us in hw.
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*/
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if (pipe_config->pipe_src_h != adjusted_mode->vdisplay ||
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pipe_config->pipe_src_w != adjusted_mode->hdisplay) {
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pfit_control |= PFIT_ENABLE;
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if (INTEL_INFO(dev)->gen >= 4)
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pfit_control |= PFIT_SCALING_AUTO;
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else
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pfit_control |= (VERT_AUTO_SCALE |
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VERT_INTERP_BILINEAR |
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HORIZ_AUTO_SCALE |
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HORIZ_INTERP_BILINEAR);
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}
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break;
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default:
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WARN(1, "bad panel fit mode: %d\n", fitting_mode);
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return;
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}
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/* 965+ wants fuzzy fitting */
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/* FIXME: handle multiple panels by failing gracefully */
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if (INTEL_INFO(dev)->gen >= 4)
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pfit_control |= ((intel_crtc->pipe << PFIT_PIPE_SHIFT) |
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PFIT_FILTER_FUZZY);
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out:
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if ((pfit_control & PFIT_ENABLE) == 0) {
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pfit_control = 0;
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pfit_pgm_ratios = 0;
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}
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/* Make sure pre-965 set dither correctly for 18bpp panels. */
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if (INTEL_INFO(dev)->gen < 4 && pipe_config->pipe_bpp == 18)
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pfit_control |= PANEL_8TO6_DITHER_ENABLE;
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pipe_config->gmch_pfit.control = pfit_control;
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pipe_config->gmch_pfit.pgm_ratios = pfit_pgm_ratios;
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pipe_config->gmch_pfit.lvds_border_bits = border;
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}
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enum drm_connector_status
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intel_panel_detect(struct drm_device *dev)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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/* Assume that the BIOS does not lie through the OpRegion... */
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if (!i915.panel_ignore_lid && dev_priv->opregion.lid_state) {
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return ioread32(dev_priv->opregion.lid_state) & 0x1 ?
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connector_status_connected :
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connector_status_disconnected;
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}
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switch (i915.panel_ignore_lid) {
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case -2:
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return connector_status_connected;
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case -1:
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return connector_status_disconnected;
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default:
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return connector_status_unknown;
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}
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}
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/**
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* scale - scale values from one range to another
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*
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* @source_val: value in range [@source_min..@source_max]
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*
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* Return @source_val in range [@source_min..@source_max] scaled to range
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* [@target_min..@target_max].
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*/
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static uint32_t scale(uint32_t source_val,
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uint32_t source_min, uint32_t source_max,
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uint32_t target_min, uint32_t target_max)
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{
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uint64_t target_val;
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WARN_ON(source_min > source_max);
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WARN_ON(target_min > target_max);
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/* defensive */
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source_val = clamp(source_val, source_min, source_max);
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/* avoid overflows */
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target_val = DIV_ROUND_CLOSEST_ULL((uint64_t)(source_val - source_min) *
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(target_max - target_min), source_max - source_min);
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target_val += target_min;
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return target_val;
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}
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/* Scale user_level in range [0..user_max] to [hw_min..hw_max]. */
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static inline u32 scale_user_to_hw(struct intel_connector *connector,
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u32 user_level, u32 user_max)
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{
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struct intel_panel *panel = &connector->panel;
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return scale(user_level, 0, user_max,
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panel->backlight.min, panel->backlight.max);
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}
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/* Scale user_level in range [0..user_max] to [0..hw_max], clamping the result
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* to [hw_min..hw_max]. */
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static inline u32 clamp_user_to_hw(struct intel_connector *connector,
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u32 user_level, u32 user_max)
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{
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struct intel_panel *panel = &connector->panel;
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u32 hw_level;
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hw_level = scale(user_level, 0, user_max, 0, panel->backlight.max);
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hw_level = clamp(hw_level, panel->backlight.min, panel->backlight.max);
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return hw_level;
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}
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/* Scale hw_level in range [hw_min..hw_max] to [0..user_max]. */
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static inline u32 scale_hw_to_user(struct intel_connector *connector,
|
|
u32 hw_level, u32 user_max)
|
|
{
|
|
struct intel_panel *panel = &connector->panel;
|
|
|
|
return scale(hw_level, panel->backlight.min, panel->backlight.max,
|
|
0, user_max);
|
|
}
|
|
|
|
static u32 intel_panel_compute_brightness(struct intel_connector *connector,
|
|
u32 val)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_panel *panel = &connector->panel;
|
|
|
|
WARN_ON(panel->backlight.max == 0);
|
|
|
|
if (i915.invert_brightness < 0)
|
|
return val;
|
|
|
|
if (i915.invert_brightness > 0 ||
|
|
dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) {
|
|
return panel->backlight.max - val;
|
|
}
|
|
|
|
return val;
|
|
}
|
|
|
|
static u32 bdw_get_backlight(struct intel_connector *connector)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
|
|
return I915_READ(BLC_PWM_PCH_CTL2) & BACKLIGHT_DUTY_CYCLE_MASK;
|
|
}
|
|
|
|
static u32 pch_get_backlight(struct intel_connector *connector)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
|
|
return I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
|
|
}
|
|
|
|
static u32 i9xx_get_backlight(struct intel_connector *connector)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_panel *panel = &connector->panel;
|
|
u32 val;
|
|
|
|
val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
|
|
if (INTEL_INFO(dev)->gen < 4)
|
|
val >>= 1;
|
|
|
|
if (panel->backlight.combination_mode) {
|
|
u8 lbpc;
|
|
|
|
pci_read_config_byte(dev->pdev, PCI_LBPC, &lbpc);
|
|
val *= lbpc;
|
|
}
|
|
|
|
return val;
|
|
}
|
|
|
|
static u32 _vlv_get_backlight(struct drm_device *dev, enum pipe pipe)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
|
|
if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
|
|
return 0;
|
|
|
|
return I915_READ(VLV_BLC_PWM_CTL(pipe)) & BACKLIGHT_DUTY_CYCLE_MASK;
|
|
}
|
|
|
|
static u32 vlv_get_backlight(struct intel_connector *connector)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
enum pipe pipe = intel_get_pipe_from_connector(connector);
|
|
|
|
return _vlv_get_backlight(dev, pipe);
|
|
}
|
|
|
|
static u32 bxt_get_backlight(struct intel_connector *connector)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
|
|
return I915_READ(BXT_BLC_PWM_DUTY1);
|
|
}
|
|
|
|
static u32 pwm_get_backlight(struct intel_connector *connector)
|
|
{
|
|
struct intel_panel *panel = &connector->panel;
|
|
int duty_ns;
|
|
|
|
duty_ns = pwm_get_duty_cycle(panel->backlight.pwm);
|
|
return DIV_ROUND_UP(duty_ns * 100, CRC_PMIC_PWM_PERIOD_NS);
|
|
}
|
|
|
|
static u32 intel_panel_get_backlight(struct intel_connector *connector)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_panel *panel = &connector->panel;
|
|
u32 val = 0;
|
|
|
|
mutex_lock(&dev_priv->backlight_lock);
|
|
|
|
if (panel->backlight.enabled) {
|
|
val = dev_priv->display.get_backlight(connector);
|
|
val = intel_panel_compute_brightness(connector, val);
|
|
}
|
|
|
|
mutex_unlock(&dev_priv->backlight_lock);
|
|
|
|
DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val);
|
|
return val;
|
|
}
|
|
|
|
static void bdw_set_backlight(struct intel_connector *connector, u32 level)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 val = I915_READ(BLC_PWM_PCH_CTL2) & ~BACKLIGHT_DUTY_CYCLE_MASK;
|
|
I915_WRITE(BLC_PWM_PCH_CTL2, val | level);
|
|
}
|
|
|
|
static void pch_set_backlight(struct intel_connector *connector, u32 level)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 tmp;
|
|
|
|
tmp = I915_READ(BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
|
|
I915_WRITE(BLC_PWM_CPU_CTL, tmp | level);
|
|
}
|
|
|
|
static void i9xx_set_backlight(struct intel_connector *connector, u32 level)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_panel *panel = &connector->panel;
|
|
u32 tmp, mask;
|
|
|
|
WARN_ON(panel->backlight.max == 0);
|
|
|
|
if (panel->backlight.combination_mode) {
|
|
u8 lbpc;
|
|
|
|
lbpc = level * 0xfe / panel->backlight.max + 1;
|
|
level /= lbpc;
|
|
pci_write_config_byte(dev->pdev, PCI_LBPC, lbpc);
|
|
}
|
|
|
|
if (IS_GEN4(dev)) {
|
|
mask = BACKLIGHT_DUTY_CYCLE_MASK;
|
|
} else {
|
|
level <<= 1;
|
|
mask = BACKLIGHT_DUTY_CYCLE_MASK_PNV;
|
|
}
|
|
|
|
tmp = I915_READ(BLC_PWM_CTL) & ~mask;
|
|
I915_WRITE(BLC_PWM_CTL, tmp | level);
|
|
}
|
|
|
|
static void vlv_set_backlight(struct intel_connector *connector, u32 level)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
enum pipe pipe = intel_get_pipe_from_connector(connector);
|
|
u32 tmp;
|
|
|
|
if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
|
|
return;
|
|
|
|
tmp = I915_READ(VLV_BLC_PWM_CTL(pipe)) & ~BACKLIGHT_DUTY_CYCLE_MASK;
|
|
I915_WRITE(VLV_BLC_PWM_CTL(pipe), tmp | level);
|
|
}
|
|
|
|
static void bxt_set_backlight(struct intel_connector *connector, u32 level)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
|
|
I915_WRITE(BXT_BLC_PWM_DUTY1, level);
|
|
}
|
|
|
|
static void pwm_set_backlight(struct intel_connector *connector, u32 level)
|
|
{
|
|
struct intel_panel *panel = &connector->panel;
|
|
int duty_ns = DIV_ROUND_UP(level * CRC_PMIC_PWM_PERIOD_NS, 100);
|
|
|
|
pwm_config(panel->backlight.pwm, duty_ns, CRC_PMIC_PWM_PERIOD_NS);
|
|
}
|
|
|
|
static void
|
|
intel_panel_actually_set_backlight(struct intel_connector *connector, u32 level)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
|
|
DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level);
|
|
|
|
level = intel_panel_compute_brightness(connector, level);
|
|
dev_priv->display.set_backlight(connector, level);
|
|
}
|
|
|
|
/* set backlight brightness to level in range [0..max], scaling wrt hw min */
|
|
static void intel_panel_set_backlight(struct intel_connector *connector,
|
|
u32 user_level, u32 user_max)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_panel *panel = &connector->panel;
|
|
u32 hw_level;
|
|
|
|
if (!panel->backlight.present)
|
|
return;
|
|
|
|
mutex_lock(&dev_priv->backlight_lock);
|
|
|
|
WARN_ON(panel->backlight.max == 0);
|
|
|
|
hw_level = scale_user_to_hw(connector, user_level, user_max);
|
|
panel->backlight.level = hw_level;
|
|
|
|
if (panel->backlight.enabled)
|
|
intel_panel_actually_set_backlight(connector, hw_level);
|
|
|
|
mutex_unlock(&dev_priv->backlight_lock);
|
|
}
|
|
|
|
/* set backlight brightness to level in range [0..max], assuming hw min is
|
|
* respected.
|
|
*/
|
|
void intel_panel_set_backlight_acpi(struct intel_connector *connector,
|
|
u32 user_level, u32 user_max)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_panel *panel = &connector->panel;
|
|
enum pipe pipe = intel_get_pipe_from_connector(connector);
|
|
u32 hw_level;
|
|
|
|
/*
|
|
* INVALID_PIPE may occur during driver init because
|
|
* connection_mutex isn't held across the entire backlight
|
|
* setup + modeset readout, and the BIOS can issue the
|
|
* requests at any time.
|
|
*/
|
|
if (!panel->backlight.present || pipe == INVALID_PIPE)
|
|
return;
|
|
|
|
mutex_lock(&dev_priv->backlight_lock);
|
|
|
|
WARN_ON(panel->backlight.max == 0);
|
|
|
|
hw_level = clamp_user_to_hw(connector, user_level, user_max);
|
|
panel->backlight.level = hw_level;
|
|
|
|
if (panel->backlight.device)
|
|
panel->backlight.device->props.brightness =
|
|
scale_hw_to_user(connector,
|
|
panel->backlight.level,
|
|
panel->backlight.device->props.max_brightness);
|
|
|
|
if (panel->backlight.enabled)
|
|
intel_panel_actually_set_backlight(connector, hw_level);
|
|
|
|
mutex_unlock(&dev_priv->backlight_lock);
|
|
}
|
|
|
|
static void pch_disable_backlight(struct intel_connector *connector)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 tmp;
|
|
|
|
intel_panel_actually_set_backlight(connector, 0);
|
|
|
|
tmp = I915_READ(BLC_PWM_CPU_CTL2);
|
|
I915_WRITE(BLC_PWM_CPU_CTL2, tmp & ~BLM_PWM_ENABLE);
|
|
|
|
tmp = I915_READ(BLC_PWM_PCH_CTL1);
|
|
I915_WRITE(BLC_PWM_PCH_CTL1, tmp & ~BLM_PCH_PWM_ENABLE);
|
|
}
|
|
|
|
static void i9xx_disable_backlight(struct intel_connector *connector)
|
|
{
|
|
intel_panel_actually_set_backlight(connector, 0);
|
|
}
|
|
|
|
static void i965_disable_backlight(struct intel_connector *connector)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 tmp;
|
|
|
|
intel_panel_actually_set_backlight(connector, 0);
|
|
|
|
tmp = I915_READ(BLC_PWM_CTL2);
|
|
I915_WRITE(BLC_PWM_CTL2, tmp & ~BLM_PWM_ENABLE);
|
|
}
|
|
|
|
static void vlv_disable_backlight(struct intel_connector *connector)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
enum pipe pipe = intel_get_pipe_from_connector(connector);
|
|
u32 tmp;
|
|
|
|
if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
|
|
return;
|
|
|
|
intel_panel_actually_set_backlight(connector, 0);
|
|
|
|
tmp = I915_READ(VLV_BLC_PWM_CTL2(pipe));
|
|
I915_WRITE(VLV_BLC_PWM_CTL2(pipe), tmp & ~BLM_PWM_ENABLE);
|
|
}
|
|
|
|
static void bxt_disable_backlight(struct intel_connector *connector)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 tmp;
|
|
|
|
intel_panel_actually_set_backlight(connector, 0);
|
|
|
|
tmp = I915_READ(BXT_BLC_PWM_CTL1);
|
|
I915_WRITE(BXT_BLC_PWM_CTL1, tmp & ~BXT_BLC_PWM_ENABLE);
|
|
}
|
|
|
|
static void pwm_disable_backlight(struct intel_connector *connector)
|
|
{
|
|
struct intel_panel *panel = &connector->panel;
|
|
|
|
/* Disable the backlight */
|
|
pwm_config(panel->backlight.pwm, 0, CRC_PMIC_PWM_PERIOD_NS);
|
|
usleep_range(2000, 3000);
|
|
pwm_disable(panel->backlight.pwm);
|
|
}
|
|
|
|
void intel_panel_disable_backlight(struct intel_connector *connector)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_panel *panel = &connector->panel;
|
|
|
|
if (!panel->backlight.present)
|
|
return;
|
|
|
|
/*
|
|
* Do not disable backlight on the vgaswitcheroo path. When switching
|
|
* away from i915, the other client may depend on i915 to handle the
|
|
* backlight. This will leave the backlight on unnecessarily when
|
|
* another client is not activated.
|
|
*/
|
|
if (dev->switch_power_state == DRM_SWITCH_POWER_CHANGING) {
|
|
DRM_DEBUG_DRIVER("Skipping backlight disable on vga switch\n");
|
|
return;
|
|
}
|
|
|
|
mutex_lock(&dev_priv->backlight_lock);
|
|
|
|
if (panel->backlight.device)
|
|
panel->backlight.device->props.power = FB_BLANK_POWERDOWN;
|
|
panel->backlight.enabled = false;
|
|
dev_priv->display.disable_backlight(connector);
|
|
|
|
mutex_unlock(&dev_priv->backlight_lock);
|
|
}
|
|
|
|
static void bdw_enable_backlight(struct intel_connector *connector)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_panel *panel = &connector->panel;
|
|
u32 pch_ctl1, pch_ctl2;
|
|
|
|
pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
|
|
if (pch_ctl1 & BLM_PCH_PWM_ENABLE) {
|
|
DRM_DEBUG_KMS("pch backlight already enabled\n");
|
|
pch_ctl1 &= ~BLM_PCH_PWM_ENABLE;
|
|
I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
|
|
}
|
|
|
|
pch_ctl2 = panel->backlight.max << 16;
|
|
I915_WRITE(BLC_PWM_PCH_CTL2, pch_ctl2);
|
|
|
|
pch_ctl1 = 0;
|
|
if (panel->backlight.active_low_pwm)
|
|
pch_ctl1 |= BLM_PCH_POLARITY;
|
|
|
|
/* After LPT, override is the default. */
|
|
if (HAS_PCH_LPT(dev_priv))
|
|
pch_ctl1 |= BLM_PCH_OVERRIDE_ENABLE;
|
|
|
|
I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
|
|
POSTING_READ(BLC_PWM_PCH_CTL1);
|
|
I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE);
|
|
|
|
/* This won't stick until the above enable. */
|
|
intel_panel_actually_set_backlight(connector, panel->backlight.level);
|
|
}
|
|
|
|
static void pch_enable_backlight(struct intel_connector *connector)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_panel *panel = &connector->panel;
|
|
enum pipe pipe = intel_get_pipe_from_connector(connector);
|
|
enum transcoder cpu_transcoder =
|
|
intel_pipe_to_cpu_transcoder(dev_priv, pipe);
|
|
u32 cpu_ctl2, pch_ctl1, pch_ctl2;
|
|
|
|
cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2);
|
|
if (cpu_ctl2 & BLM_PWM_ENABLE) {
|
|
DRM_DEBUG_KMS("cpu backlight already enabled\n");
|
|
cpu_ctl2 &= ~BLM_PWM_ENABLE;
|
|
I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2);
|
|
}
|
|
|
|
pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
|
|
if (pch_ctl1 & BLM_PCH_PWM_ENABLE) {
|
|
DRM_DEBUG_KMS("pch backlight already enabled\n");
|
|
pch_ctl1 &= ~BLM_PCH_PWM_ENABLE;
|
|
I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
|
|
}
|
|
|
|
if (cpu_transcoder == TRANSCODER_EDP)
|
|
cpu_ctl2 = BLM_TRANSCODER_EDP;
|
|
else
|
|
cpu_ctl2 = BLM_PIPE(cpu_transcoder);
|
|
I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2);
|
|
POSTING_READ(BLC_PWM_CPU_CTL2);
|
|
I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2 | BLM_PWM_ENABLE);
|
|
|
|
/* This won't stick until the above enable. */
|
|
intel_panel_actually_set_backlight(connector, panel->backlight.level);
|
|
|
|
pch_ctl2 = panel->backlight.max << 16;
|
|
I915_WRITE(BLC_PWM_PCH_CTL2, pch_ctl2);
|
|
|
|
pch_ctl1 = 0;
|
|
if (panel->backlight.active_low_pwm)
|
|
pch_ctl1 |= BLM_PCH_POLARITY;
|
|
|
|
I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
|
|
POSTING_READ(BLC_PWM_PCH_CTL1);
|
|
I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE);
|
|
}
|
|
|
|
static void i9xx_enable_backlight(struct intel_connector *connector)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_panel *panel = &connector->panel;
|
|
u32 ctl, freq;
|
|
|
|
ctl = I915_READ(BLC_PWM_CTL);
|
|
if (ctl & BACKLIGHT_DUTY_CYCLE_MASK_PNV) {
|
|
DRM_DEBUG_KMS("backlight already enabled\n");
|
|
I915_WRITE(BLC_PWM_CTL, 0);
|
|
}
|
|
|
|
freq = panel->backlight.max;
|
|
if (panel->backlight.combination_mode)
|
|
freq /= 0xff;
|
|
|
|
ctl = freq << 17;
|
|
if (panel->backlight.combination_mode)
|
|
ctl |= BLM_LEGACY_MODE;
|
|
if (IS_PINEVIEW(dev) && panel->backlight.active_low_pwm)
|
|
ctl |= BLM_POLARITY_PNV;
|
|
|
|
I915_WRITE(BLC_PWM_CTL, ctl);
|
|
POSTING_READ(BLC_PWM_CTL);
|
|
|
|
/* XXX: combine this into above write? */
|
|
intel_panel_actually_set_backlight(connector, panel->backlight.level);
|
|
|
|
/*
|
|
* Needed to enable backlight on some 855gm models. BLC_HIST_CTL is
|
|
* 855gm only, but checking for gen2 is safe, as 855gm is the only gen2
|
|
* that has backlight.
|
|
*/
|
|
if (IS_GEN2(dev))
|
|
I915_WRITE(BLC_HIST_CTL, BLM_HISTOGRAM_ENABLE);
|
|
}
|
|
|
|
static void i965_enable_backlight(struct intel_connector *connector)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_panel *panel = &connector->panel;
|
|
enum pipe pipe = intel_get_pipe_from_connector(connector);
|
|
u32 ctl, ctl2, freq;
|
|
|
|
ctl2 = I915_READ(BLC_PWM_CTL2);
|
|
if (ctl2 & BLM_PWM_ENABLE) {
|
|
DRM_DEBUG_KMS("backlight already enabled\n");
|
|
ctl2 &= ~BLM_PWM_ENABLE;
|
|
I915_WRITE(BLC_PWM_CTL2, ctl2);
|
|
}
|
|
|
|
freq = panel->backlight.max;
|
|
if (panel->backlight.combination_mode)
|
|
freq /= 0xff;
|
|
|
|
ctl = freq << 16;
|
|
I915_WRITE(BLC_PWM_CTL, ctl);
|
|
|
|
ctl2 = BLM_PIPE(pipe);
|
|
if (panel->backlight.combination_mode)
|
|
ctl2 |= BLM_COMBINATION_MODE;
|
|
if (panel->backlight.active_low_pwm)
|
|
ctl2 |= BLM_POLARITY_I965;
|
|
I915_WRITE(BLC_PWM_CTL2, ctl2);
|
|
POSTING_READ(BLC_PWM_CTL2);
|
|
I915_WRITE(BLC_PWM_CTL2, ctl2 | BLM_PWM_ENABLE);
|
|
|
|
intel_panel_actually_set_backlight(connector, panel->backlight.level);
|
|
}
|
|
|
|
static void vlv_enable_backlight(struct intel_connector *connector)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_panel *panel = &connector->panel;
|
|
enum pipe pipe = intel_get_pipe_from_connector(connector);
|
|
u32 ctl, ctl2;
|
|
|
|
if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
|
|
return;
|
|
|
|
ctl2 = I915_READ(VLV_BLC_PWM_CTL2(pipe));
|
|
if (ctl2 & BLM_PWM_ENABLE) {
|
|
DRM_DEBUG_KMS("backlight already enabled\n");
|
|
ctl2 &= ~BLM_PWM_ENABLE;
|
|
I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2);
|
|
}
|
|
|
|
ctl = panel->backlight.max << 16;
|
|
I915_WRITE(VLV_BLC_PWM_CTL(pipe), ctl);
|
|
|
|
/* XXX: combine this into above write? */
|
|
intel_panel_actually_set_backlight(connector, panel->backlight.level);
|
|
|
|
ctl2 = 0;
|
|
if (panel->backlight.active_low_pwm)
|
|
ctl2 |= BLM_POLARITY_I965;
|
|
I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2);
|
|
POSTING_READ(VLV_BLC_PWM_CTL2(pipe));
|
|
I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2 | BLM_PWM_ENABLE);
|
|
}
|
|
|
|
static void bxt_enable_backlight(struct intel_connector *connector)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_panel *panel = &connector->panel;
|
|
u32 pwm_ctl;
|
|
|
|
pwm_ctl = I915_READ(BXT_BLC_PWM_CTL1);
|
|
if (pwm_ctl & BXT_BLC_PWM_ENABLE) {
|
|
DRM_DEBUG_KMS("backlight already enabled\n");
|
|
pwm_ctl &= ~BXT_BLC_PWM_ENABLE;
|
|
I915_WRITE(BXT_BLC_PWM_CTL1, pwm_ctl);
|
|
}
|
|
|
|
I915_WRITE(BXT_BLC_PWM_FREQ1, panel->backlight.max);
|
|
|
|
intel_panel_actually_set_backlight(connector, panel->backlight.level);
|
|
|
|
pwm_ctl = 0;
|
|
if (panel->backlight.active_low_pwm)
|
|
pwm_ctl |= BXT_BLC_PWM_POLARITY;
|
|
|
|
I915_WRITE(BXT_BLC_PWM_CTL1, pwm_ctl);
|
|
POSTING_READ(BXT_BLC_PWM_CTL1);
|
|
I915_WRITE(BXT_BLC_PWM_CTL1, pwm_ctl | BXT_BLC_PWM_ENABLE);
|
|
}
|
|
|
|
static void pwm_enable_backlight(struct intel_connector *connector)
|
|
{
|
|
struct intel_panel *panel = &connector->panel;
|
|
|
|
pwm_enable(panel->backlight.pwm);
|
|
intel_panel_actually_set_backlight(connector, panel->backlight.level);
|
|
}
|
|
|
|
void intel_panel_enable_backlight(struct intel_connector *connector)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_panel *panel = &connector->panel;
|
|
enum pipe pipe = intel_get_pipe_from_connector(connector);
|
|
|
|
if (!panel->backlight.present)
|
|
return;
|
|
|
|
DRM_DEBUG_KMS("pipe %c\n", pipe_name(pipe));
|
|
|
|
mutex_lock(&dev_priv->backlight_lock);
|
|
|
|
WARN_ON(panel->backlight.max == 0);
|
|
|
|
if (panel->backlight.level <= panel->backlight.min) {
|
|
panel->backlight.level = panel->backlight.max;
|
|
if (panel->backlight.device)
|
|
panel->backlight.device->props.brightness =
|
|
scale_hw_to_user(connector,
|
|
panel->backlight.level,
|
|
panel->backlight.device->props.max_brightness);
|
|
}
|
|
|
|
dev_priv->display.enable_backlight(connector);
|
|
panel->backlight.enabled = true;
|
|
if (panel->backlight.device)
|
|
panel->backlight.device->props.power = FB_BLANK_UNBLANK;
|
|
|
|
mutex_unlock(&dev_priv->backlight_lock);
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE)
|
|
static int intel_backlight_device_update_status(struct backlight_device *bd)
|
|
{
|
|
struct intel_connector *connector = bl_get_data(bd);
|
|
struct intel_panel *panel = &connector->panel;
|
|
struct drm_device *dev = connector->base.dev;
|
|
|
|
drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
|
|
DRM_DEBUG_KMS("updating intel_backlight, brightness=%d/%d\n",
|
|
bd->props.brightness, bd->props.max_brightness);
|
|
intel_panel_set_backlight(connector, bd->props.brightness,
|
|
bd->props.max_brightness);
|
|
|
|
/*
|
|
* Allow flipping bl_power as a sub-state of enabled. Sadly the
|
|
* backlight class device does not make it easy to to differentiate
|
|
* between callbacks for brightness and bl_power, so our backlight_power
|
|
* callback needs to take this into account.
|
|
*/
|
|
if (panel->backlight.enabled) {
|
|
if (panel->backlight_power) {
|
|
bool enable = bd->props.power == FB_BLANK_UNBLANK &&
|
|
bd->props.brightness != 0;
|
|
panel->backlight_power(connector, enable);
|
|
}
|
|
} else {
|
|
bd->props.power = FB_BLANK_POWERDOWN;
|
|
}
|
|
|
|
drm_modeset_unlock(&dev->mode_config.connection_mutex);
|
|
return 0;
|
|
}
|
|
|
|
static int intel_backlight_device_get_brightness(struct backlight_device *bd)
|
|
{
|
|
struct intel_connector *connector = bl_get_data(bd);
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 hw_level;
|
|
int ret;
|
|
|
|
intel_runtime_pm_get(dev_priv);
|
|
drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
|
|
|
|
hw_level = intel_panel_get_backlight(connector);
|
|
ret = scale_hw_to_user(connector, hw_level, bd->props.max_brightness);
|
|
|
|
drm_modeset_unlock(&dev->mode_config.connection_mutex);
|
|
intel_runtime_pm_put(dev_priv);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct backlight_ops intel_backlight_device_ops = {
|
|
.update_status = intel_backlight_device_update_status,
|
|
.get_brightness = intel_backlight_device_get_brightness,
|
|
};
|
|
|
|
static int intel_backlight_device_register(struct intel_connector *connector)
|
|
{
|
|
struct intel_panel *panel = &connector->panel;
|
|
struct backlight_properties props;
|
|
|
|
if (WARN_ON(panel->backlight.device))
|
|
return -ENODEV;
|
|
|
|
if (!panel->backlight.present)
|
|
return 0;
|
|
|
|
WARN_ON(panel->backlight.max == 0);
|
|
|
|
memset(&props, 0, sizeof(props));
|
|
props.type = BACKLIGHT_RAW;
|
|
|
|
/*
|
|
* Note: Everything should work even if the backlight device max
|
|
* presented to the userspace is arbitrarily chosen.
|
|
*/
|
|
props.max_brightness = panel->backlight.max;
|
|
props.brightness = scale_hw_to_user(connector,
|
|
panel->backlight.level,
|
|
props.max_brightness);
|
|
|
|
if (panel->backlight.enabled)
|
|
props.power = FB_BLANK_UNBLANK;
|
|
else
|
|
props.power = FB_BLANK_POWERDOWN;
|
|
|
|
/*
|
|
* Note: using the same name independent of the connector prevents
|
|
* registration of multiple backlight devices in the driver.
|
|
*/
|
|
panel->backlight.device =
|
|
backlight_device_register("intel_backlight",
|
|
connector->base.kdev,
|
|
connector,
|
|
&intel_backlight_device_ops, &props);
|
|
|
|
if (IS_ERR(panel->backlight.device)) {
|
|
DRM_ERROR("Failed to register backlight: %ld\n",
|
|
PTR_ERR(panel->backlight.device));
|
|
panel->backlight.device = NULL;
|
|
return -ENODEV;
|
|
}
|
|
|
|
DRM_DEBUG_KMS("Connector %s backlight sysfs interface registered\n",
|
|
connector->base.name);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void intel_backlight_device_unregister(struct intel_connector *connector)
|
|
{
|
|
struct intel_panel *panel = &connector->panel;
|
|
|
|
if (panel->backlight.device) {
|
|
backlight_device_unregister(panel->backlight.device);
|
|
panel->backlight.device = NULL;
|
|
}
|
|
}
|
|
#else /* CONFIG_BACKLIGHT_CLASS_DEVICE */
|
|
static int intel_backlight_device_register(struct intel_connector *connector)
|
|
{
|
|
return 0;
|
|
}
|
|
static void intel_backlight_device_unregister(struct intel_connector *connector)
|
|
{
|
|
}
|
|
#endif /* CONFIG_BACKLIGHT_CLASS_DEVICE */
|
|
|
|
/*
|
|
* Note: The setup hooks can't assume pipe is set!
|
|
*
|
|
* XXX: Query mode clock or hardware clock and program PWM modulation frequency
|
|
* appropriately when it's 0. Use VBT and/or sane defaults.
|
|
*/
|
|
static u32 get_backlight_min_vbt(struct intel_connector *connector)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_panel *panel = &connector->panel;
|
|
int min;
|
|
|
|
WARN_ON(panel->backlight.max == 0);
|
|
|
|
/*
|
|
* XXX: If the vbt value is 255, it makes min equal to max, which leads
|
|
* to problems. There are such machines out there. Either our
|
|
* interpretation is wrong or the vbt has bogus data. Or both. Safeguard
|
|
* against this by letting the minimum be at most (arbitrarily chosen)
|
|
* 25% of the max.
|
|
*/
|
|
min = clamp_t(int, dev_priv->vbt.backlight.min_brightness, 0, 64);
|
|
if (min != dev_priv->vbt.backlight.min_brightness) {
|
|
DRM_DEBUG_KMS("clamping VBT min backlight %d/255 to %d/255\n",
|
|
dev_priv->vbt.backlight.min_brightness, min);
|
|
}
|
|
|
|
/* vbt value is a coefficient in range [0..255] */
|
|
return scale(min, 0, 255, 0, panel->backlight.max);
|
|
}
|
|
|
|
static int bdw_setup_backlight(struct intel_connector *connector, enum pipe unused)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_panel *panel = &connector->panel;
|
|
u32 pch_ctl1, pch_ctl2, val;
|
|
|
|
pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
|
|
panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY;
|
|
|
|
pch_ctl2 = I915_READ(BLC_PWM_PCH_CTL2);
|
|
panel->backlight.max = pch_ctl2 >> 16;
|
|
if (!panel->backlight.max)
|
|
return -ENODEV;
|
|
|
|
panel->backlight.min = get_backlight_min_vbt(connector);
|
|
|
|
val = bdw_get_backlight(connector);
|
|
panel->backlight.level = intel_panel_compute_brightness(connector, val);
|
|
|
|
panel->backlight.enabled = (pch_ctl1 & BLM_PCH_PWM_ENABLE) &&
|
|
panel->backlight.level != 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pch_setup_backlight(struct intel_connector *connector, enum pipe unused)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_panel *panel = &connector->panel;
|
|
u32 cpu_ctl2, pch_ctl1, pch_ctl2, val;
|
|
|
|
pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
|
|
panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY;
|
|
|
|
pch_ctl2 = I915_READ(BLC_PWM_PCH_CTL2);
|
|
panel->backlight.max = pch_ctl2 >> 16;
|
|
if (!panel->backlight.max)
|
|
return -ENODEV;
|
|
|
|
panel->backlight.min = get_backlight_min_vbt(connector);
|
|
|
|
val = pch_get_backlight(connector);
|
|
panel->backlight.level = intel_panel_compute_brightness(connector, val);
|
|
|
|
cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2);
|
|
panel->backlight.enabled = (cpu_ctl2 & BLM_PWM_ENABLE) &&
|
|
(pch_ctl1 & BLM_PCH_PWM_ENABLE) && panel->backlight.level != 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int i9xx_setup_backlight(struct intel_connector *connector, enum pipe unused)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_panel *panel = &connector->panel;
|
|
u32 ctl, val;
|
|
|
|
ctl = I915_READ(BLC_PWM_CTL);
|
|
|
|
if (IS_GEN2(dev) || IS_I915GM(dev) || IS_I945GM(dev))
|
|
panel->backlight.combination_mode = ctl & BLM_LEGACY_MODE;
|
|
|
|
if (IS_PINEVIEW(dev))
|
|
panel->backlight.active_low_pwm = ctl & BLM_POLARITY_PNV;
|
|
|
|
panel->backlight.max = ctl >> 17;
|
|
if (panel->backlight.combination_mode)
|
|
panel->backlight.max *= 0xff;
|
|
|
|
if (!panel->backlight.max)
|
|
return -ENODEV;
|
|
|
|
panel->backlight.min = get_backlight_min_vbt(connector);
|
|
|
|
val = i9xx_get_backlight(connector);
|
|
panel->backlight.level = intel_panel_compute_brightness(connector, val);
|
|
|
|
panel->backlight.enabled = panel->backlight.level != 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int i965_setup_backlight(struct intel_connector *connector, enum pipe unused)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_panel *panel = &connector->panel;
|
|
u32 ctl, ctl2, val;
|
|
|
|
ctl2 = I915_READ(BLC_PWM_CTL2);
|
|
panel->backlight.combination_mode = ctl2 & BLM_COMBINATION_MODE;
|
|
panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965;
|
|
|
|
ctl = I915_READ(BLC_PWM_CTL);
|
|
panel->backlight.max = ctl >> 16;
|
|
if (panel->backlight.combination_mode)
|
|
panel->backlight.max *= 0xff;
|
|
|
|
if (!panel->backlight.max)
|
|
return -ENODEV;
|
|
|
|
panel->backlight.min = get_backlight_min_vbt(connector);
|
|
|
|
val = i9xx_get_backlight(connector);
|
|
panel->backlight.level = intel_panel_compute_brightness(connector, val);
|
|
|
|
panel->backlight.enabled = (ctl2 & BLM_PWM_ENABLE) &&
|
|
panel->backlight.level != 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vlv_setup_backlight(struct intel_connector *connector, enum pipe pipe)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_panel *panel = &connector->panel;
|
|
enum pipe p;
|
|
u32 ctl, ctl2, val;
|
|
|
|
for_each_pipe(dev_priv, p) {
|
|
u32 cur_val = I915_READ(VLV_BLC_PWM_CTL(p));
|
|
|
|
/* Skip if the modulation freq is already set */
|
|
if (cur_val & ~BACKLIGHT_DUTY_CYCLE_MASK)
|
|
continue;
|
|
|
|
cur_val &= BACKLIGHT_DUTY_CYCLE_MASK;
|
|
I915_WRITE(VLV_BLC_PWM_CTL(p), (0xf42 << 16) |
|
|
cur_val);
|
|
}
|
|
|
|
if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
|
|
return -ENODEV;
|
|
|
|
ctl2 = I915_READ(VLV_BLC_PWM_CTL2(pipe));
|
|
panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965;
|
|
|
|
ctl = I915_READ(VLV_BLC_PWM_CTL(pipe));
|
|
panel->backlight.max = ctl >> 16;
|
|
if (!panel->backlight.max)
|
|
return -ENODEV;
|
|
|
|
panel->backlight.min = get_backlight_min_vbt(connector);
|
|
|
|
val = _vlv_get_backlight(dev, pipe);
|
|
panel->backlight.level = intel_panel_compute_brightness(connector, val);
|
|
|
|
panel->backlight.enabled = (ctl2 & BLM_PWM_ENABLE) &&
|
|
panel->backlight.level != 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
bxt_setup_backlight(struct intel_connector *connector, enum pipe unused)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_panel *panel = &connector->panel;
|
|
u32 pwm_ctl, val;
|
|
|
|
pwm_ctl = I915_READ(BXT_BLC_PWM_CTL1);
|
|
panel->backlight.active_low_pwm = pwm_ctl & BXT_BLC_PWM_POLARITY;
|
|
|
|
panel->backlight.max = I915_READ(BXT_BLC_PWM_FREQ1);
|
|
if (!panel->backlight.max)
|
|
return -ENODEV;
|
|
|
|
val = bxt_get_backlight(connector);
|
|
panel->backlight.level = intel_panel_compute_brightness(connector, val);
|
|
|
|
panel->backlight.enabled = (pwm_ctl & BXT_BLC_PWM_ENABLE) &&
|
|
panel->backlight.level != 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pwm_setup_backlight(struct intel_connector *connector,
|
|
enum pipe pipe)
|
|
{
|
|
struct drm_device *dev = connector->base.dev;
|
|
struct intel_panel *panel = &connector->panel;
|
|
int retval;
|
|
|
|
/* Get the PWM chip for backlight control */
|
|
panel->backlight.pwm = pwm_get(dev->dev, "pwm_backlight");
|
|
if (IS_ERR(panel->backlight.pwm)) {
|
|
DRM_ERROR("Failed to own the pwm chip\n");
|
|
panel->backlight.pwm = NULL;
|
|
return -ENODEV;
|
|
}
|
|
|
|
retval = pwm_config(panel->backlight.pwm, CRC_PMIC_PWM_PERIOD_NS,
|
|
CRC_PMIC_PWM_PERIOD_NS);
|
|
if (retval < 0) {
|
|
DRM_ERROR("Failed to configure the pwm chip\n");
|
|
pwm_put(panel->backlight.pwm);
|
|
panel->backlight.pwm = NULL;
|
|
return retval;
|
|
}
|
|
|
|
panel->backlight.min = 0; /* 0% */
|
|
panel->backlight.max = 100; /* 100% */
|
|
panel->backlight.level = DIV_ROUND_UP(
|
|
pwm_get_duty_cycle(panel->backlight.pwm) * 100,
|
|
CRC_PMIC_PWM_PERIOD_NS);
|
|
panel->backlight.enabled = panel->backlight.level != 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int intel_panel_setup_backlight(struct drm_connector *connector, enum pipe pipe)
|
|
{
|
|
struct drm_device *dev = connector->dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_connector *intel_connector = to_intel_connector(connector);
|
|
struct intel_panel *panel = &intel_connector->panel;
|
|
int ret;
|
|
|
|
if (!dev_priv->vbt.backlight.present) {
|
|
if (dev_priv->quirks & QUIRK_BACKLIGHT_PRESENT) {
|
|
DRM_DEBUG_KMS("no backlight present per VBT, but present per quirk\n");
|
|
} else {
|
|
DRM_DEBUG_KMS("no backlight present per VBT\n");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* set level and max in panel struct */
|
|
mutex_lock(&dev_priv->backlight_lock);
|
|
ret = dev_priv->display.setup_backlight(intel_connector, pipe);
|
|
mutex_unlock(&dev_priv->backlight_lock);
|
|
|
|
if (ret) {
|
|
DRM_DEBUG_KMS("failed to setup backlight for connector %s\n",
|
|
connector->name);
|
|
return ret;
|
|
}
|
|
|
|
panel->backlight.present = true;
|
|
|
|
DRM_DEBUG_KMS("Connector %s backlight initialized, %s, brightness %u/%u\n",
|
|
connector->name,
|
|
panel->backlight.enabled ? "enabled" : "disabled",
|
|
panel->backlight.level, panel->backlight.max);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void intel_panel_destroy_backlight(struct drm_connector *connector)
|
|
{
|
|
struct intel_connector *intel_connector = to_intel_connector(connector);
|
|
struct intel_panel *panel = &intel_connector->panel;
|
|
|
|
/* dispose of the pwm */
|
|
if (panel->backlight.pwm)
|
|
pwm_put(panel->backlight.pwm);
|
|
|
|
panel->backlight.present = false;
|
|
}
|
|
|
|
/* Set up chip specific backlight functions */
|
|
void intel_panel_init_backlight_funcs(struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
|
|
if (IS_BROXTON(dev)) {
|
|
dev_priv->display.setup_backlight = bxt_setup_backlight;
|
|
dev_priv->display.enable_backlight = bxt_enable_backlight;
|
|
dev_priv->display.disable_backlight = bxt_disable_backlight;
|
|
dev_priv->display.set_backlight = bxt_set_backlight;
|
|
dev_priv->display.get_backlight = bxt_get_backlight;
|
|
} else if (IS_BROADWELL(dev) || IS_SKYLAKE(dev)) {
|
|
dev_priv->display.setup_backlight = bdw_setup_backlight;
|
|
dev_priv->display.enable_backlight = bdw_enable_backlight;
|
|
dev_priv->display.disable_backlight = pch_disable_backlight;
|
|
dev_priv->display.set_backlight = bdw_set_backlight;
|
|
dev_priv->display.get_backlight = bdw_get_backlight;
|
|
} else if (HAS_PCH_SPLIT(dev)) {
|
|
dev_priv->display.setup_backlight = pch_setup_backlight;
|
|
dev_priv->display.enable_backlight = pch_enable_backlight;
|
|
dev_priv->display.disable_backlight = pch_disable_backlight;
|
|
dev_priv->display.set_backlight = pch_set_backlight;
|
|
dev_priv->display.get_backlight = pch_get_backlight;
|
|
} else if (IS_VALLEYVIEW(dev)) {
|
|
if (dev_priv->vbt.has_mipi) {
|
|
dev_priv->display.setup_backlight = pwm_setup_backlight;
|
|
dev_priv->display.enable_backlight = pwm_enable_backlight;
|
|
dev_priv->display.disable_backlight = pwm_disable_backlight;
|
|
dev_priv->display.set_backlight = pwm_set_backlight;
|
|
dev_priv->display.get_backlight = pwm_get_backlight;
|
|
} else {
|
|
dev_priv->display.setup_backlight = vlv_setup_backlight;
|
|
dev_priv->display.enable_backlight = vlv_enable_backlight;
|
|
dev_priv->display.disable_backlight = vlv_disable_backlight;
|
|
dev_priv->display.set_backlight = vlv_set_backlight;
|
|
dev_priv->display.get_backlight = vlv_get_backlight;
|
|
}
|
|
} else if (IS_GEN4(dev)) {
|
|
dev_priv->display.setup_backlight = i965_setup_backlight;
|
|
dev_priv->display.enable_backlight = i965_enable_backlight;
|
|
dev_priv->display.disable_backlight = i965_disable_backlight;
|
|
dev_priv->display.set_backlight = i9xx_set_backlight;
|
|
dev_priv->display.get_backlight = i9xx_get_backlight;
|
|
} else {
|
|
dev_priv->display.setup_backlight = i9xx_setup_backlight;
|
|
dev_priv->display.enable_backlight = i9xx_enable_backlight;
|
|
dev_priv->display.disable_backlight = i9xx_disable_backlight;
|
|
dev_priv->display.set_backlight = i9xx_set_backlight;
|
|
dev_priv->display.get_backlight = i9xx_get_backlight;
|
|
}
|
|
}
|
|
|
|
int intel_panel_init(struct intel_panel *panel,
|
|
struct drm_display_mode *fixed_mode,
|
|
struct drm_display_mode *downclock_mode)
|
|
{
|
|
panel->fixed_mode = fixed_mode;
|
|
panel->downclock_mode = downclock_mode;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void intel_panel_fini(struct intel_panel *panel)
|
|
{
|
|
struct intel_connector *intel_connector =
|
|
container_of(panel, struct intel_connector, panel);
|
|
|
|
if (panel->fixed_mode)
|
|
drm_mode_destroy(intel_connector->base.dev, panel->fixed_mode);
|
|
|
|
if (panel->downclock_mode)
|
|
drm_mode_destroy(intel_connector->base.dev,
|
|
panel->downclock_mode);
|
|
}
|
|
|
|
void intel_backlight_register(struct drm_device *dev)
|
|
{
|
|
struct intel_connector *connector;
|
|
|
|
list_for_each_entry(connector, &dev->mode_config.connector_list, base.head)
|
|
intel_backlight_device_register(connector);
|
|
}
|
|
|
|
void intel_backlight_unregister(struct drm_device *dev)
|
|
{
|
|
struct intel_connector *connector;
|
|
|
|
list_for_each_entry(connector, &dev->mode_config.connector_list, base.head)
|
|
intel_backlight_device_unregister(connector);
|
|
}
|