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2d20411e25
Modern platforms allow the transcoders hdisplay/vdisplay to exceed the planes' max resolution. This has the nasty implication that modes on the connectors' mode list may not be usable when the user asks for a fullscreen plane. Seeing as that is the most common use case it seems prudent to filter out modes that don't allow for fullscreen planes to be enabled. Let's do that in the connetor .mode_valid() hook so that normally such modes are kept hidden but the user is still able to forcibly specify such a mode if they know they don't need fullscreen planes. This is in line with ealier policies regarding certain clock limits. The idea is to prevent the casual user from encountering a mode that would fail under typical conditions, but allow the expert user to force things if they so wish. Maybe in the future we should consider automagically using two planes when one can't cover the entire screen? Wouldn't be a great match for the current uapi with explicit planes though, but I guess no worse than using two pipes (which we apparently have to in the future anyway). Either that or we'd have to teach userspace to do it for us. v2: Fix icl+ max plane heigth (Manasi) Cc: Manasi Navare <manasi.d.navare@intel.com> Cc: Leho Kraav <leho@kraav.com> Cc: Sean Paul <sean@poorly.run> Cc: José Roberto de Souza <jose.souza@intel.com> Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Manasi Navare <manasi.d.navare@intel.com> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190918150707.32420-1-ville.syrjala@linux.intel.com
129 lines
3.1 KiB
C
129 lines
3.1 KiB
C
// SPDX-License-Identifier: MIT
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/*
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* Copyright © 2018 Intel Corporation
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*/
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#include <drm/drm_mipi_dsi.h>
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#include "intel_dsi.h"
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int intel_dsi_bitrate(const struct intel_dsi *intel_dsi)
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{
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int bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
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if (WARN_ON(bpp < 0))
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bpp = 16;
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return intel_dsi->pclk * bpp / intel_dsi->lane_count;
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}
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int intel_dsi_tlpx_ns(const struct intel_dsi *intel_dsi)
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{
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switch (intel_dsi->escape_clk_div) {
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default:
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case 0:
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return 50;
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case 1:
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return 100;
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case 2:
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return 200;
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}
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}
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int intel_dsi_get_modes(struct drm_connector *connector)
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{
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struct intel_connector *intel_connector = to_intel_connector(connector);
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struct drm_display_mode *mode;
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DRM_DEBUG_KMS("\n");
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if (!intel_connector->panel.fixed_mode) {
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DRM_DEBUG_KMS("no fixed mode\n");
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return 0;
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}
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mode = drm_mode_duplicate(connector->dev,
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intel_connector->panel.fixed_mode);
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if (!mode) {
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DRM_DEBUG_KMS("drm_mode_duplicate failed\n");
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return 0;
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}
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drm_mode_probed_add(connector, mode);
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return 1;
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}
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enum drm_mode_status intel_dsi_mode_valid(struct drm_connector *connector,
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struct drm_display_mode *mode)
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{
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struct drm_i915_private *dev_priv = to_i915(connector->dev);
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struct intel_connector *intel_connector = to_intel_connector(connector);
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const struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
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int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
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DRM_DEBUG_KMS("\n");
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if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
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return MODE_NO_DBLESCAN;
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if (fixed_mode) {
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if (mode->hdisplay > fixed_mode->hdisplay)
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return MODE_PANEL;
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if (mode->vdisplay > fixed_mode->vdisplay)
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return MODE_PANEL;
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if (fixed_mode->clock > max_dotclk)
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return MODE_CLOCK_HIGH;
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}
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return intel_mode_valid_max_plane_size(dev_priv, mode);
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}
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struct intel_dsi_host *intel_dsi_host_init(struct intel_dsi *intel_dsi,
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const struct mipi_dsi_host_ops *funcs,
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enum port port)
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{
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struct intel_dsi_host *host;
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struct mipi_dsi_device *device;
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host = kzalloc(sizeof(*host), GFP_KERNEL);
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if (!host)
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return NULL;
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host->base.ops = funcs;
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host->intel_dsi = intel_dsi;
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host->port = port;
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/*
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* We should call mipi_dsi_host_register(&host->base) here, but we don't
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* have a host->dev, and we don't have OF stuff either. So just use the
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* dsi framework as a library and hope for the best. Create the dsi
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* devices by ourselves here too. Need to be careful though, because we
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* don't initialize any of the driver model devices here.
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*/
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device = kzalloc(sizeof(*device), GFP_KERNEL);
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if (!device) {
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kfree(host);
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return NULL;
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}
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device->host = &host->base;
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host->device = device;
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return host;
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}
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enum drm_panel_orientation
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intel_dsi_get_panel_orientation(struct intel_connector *connector)
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{
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struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
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enum drm_panel_orientation orientation;
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orientation = dev_priv->vbt.dsi.orientation;
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if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
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return orientation;
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orientation = dev_priv->vbt.orientation;
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if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
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return orientation;
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return DRM_MODE_PANEL_ORIENTATION_NORMAL;
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}
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