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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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421 lines
11 KiB
C
421 lines
11 KiB
C
/*
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* Copyright (C) STMicroelectronics SA 2014
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* Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
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* Fabien Dessenne <fabien.dessenne@st.com>
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* for STMicroelectronics.
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* License terms: GNU General Public License (GPL), version 2
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*/
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#include <linux/clk.h>
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#include <drm/drmP.h>
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#include <drm/drm_crtc_helper.h>
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#include "sti_compositor.h"
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#include "sti_drm_drv.h"
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#include "sti_drm_crtc.h"
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#include "sti_vtg.h"
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static void sti_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
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{
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DRM_DEBUG_KMS("\n");
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}
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static void sti_drm_crtc_prepare(struct drm_crtc *crtc)
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{
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struct sti_mixer *mixer = to_sti_mixer(crtc);
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struct device *dev = mixer->dev;
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struct sti_compositor *compo = dev_get_drvdata(dev);
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compo->enable = true;
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/* Prepare and enable the compo IP clock */
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if (mixer->id == STI_MIXER_MAIN) {
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if (clk_prepare_enable(compo->clk_compo_main))
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DRM_INFO("Failed to prepare/enable compo_main clk\n");
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} else {
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if (clk_prepare_enable(compo->clk_compo_aux))
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DRM_INFO("Failed to prepare/enable compo_aux clk\n");
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}
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}
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static void sti_drm_crtc_commit(struct drm_crtc *crtc)
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{
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struct sti_mixer *mixer = to_sti_mixer(crtc);
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struct device *dev = mixer->dev;
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struct sti_compositor *compo = dev_get_drvdata(dev);
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struct sti_layer *layer;
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if ((!mixer || !compo)) {
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DRM_ERROR("Can not find mixer or compositor)\n");
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return;
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}
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/* get GDP which is reserved to the CRTC FB */
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layer = to_sti_layer(crtc->primary);
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if (layer)
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sti_layer_commit(layer);
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else
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DRM_ERROR("Can not find CRTC dedicated plane (GDP0)\n");
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/* Enable layer on mixer */
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if (sti_mixer_set_layer_status(mixer, layer, true))
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DRM_ERROR("Can not enable layer at mixer\n");
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}
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static bool sti_drm_crtc_mode_fixup(struct drm_crtc *crtc,
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const struct drm_display_mode *mode,
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struct drm_display_mode *adjusted_mode)
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{
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/* accept the provided drm_display_mode, do not fix it up */
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return true;
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}
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static int
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sti_drm_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
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struct drm_display_mode *adjusted_mode, int x, int y,
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struct drm_framebuffer *old_fb)
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{
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struct sti_mixer *mixer = to_sti_mixer(crtc);
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struct device *dev = mixer->dev;
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struct sti_compositor *compo = dev_get_drvdata(dev);
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struct sti_layer *layer;
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struct clk *clk;
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int rate = mode->clock * 1000;
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int res;
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unsigned int w, h;
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DRM_DEBUG_KMS("CRTC:%d (%s) fb:%d mode:%d (%s)\n",
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crtc->base.id, sti_mixer_to_str(mixer),
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crtc->primary->fb->base.id, mode->base.id, mode->name);
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DRM_DEBUG_KMS("%d %d %d %d %d %d %d %d %d %d 0x%x 0x%x\n",
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mode->vrefresh, mode->clock,
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mode->hdisplay,
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mode->hsync_start, mode->hsync_end,
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mode->htotal,
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mode->vdisplay,
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mode->vsync_start, mode->vsync_end,
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mode->vtotal, mode->type, mode->flags);
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/* Set rate and prepare/enable pixel clock */
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if (mixer->id == STI_MIXER_MAIN)
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clk = compo->clk_pix_main;
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else
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clk = compo->clk_pix_aux;
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res = clk_set_rate(clk, rate);
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if (res < 0) {
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DRM_ERROR("Cannot set rate (%dHz) for pix clk\n", rate);
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return -EINVAL;
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}
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if (clk_prepare_enable(clk)) {
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DRM_ERROR("Failed to prepare/enable pix clk\n");
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return -EINVAL;
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}
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sti_vtg_set_config(mixer->id == STI_MIXER_MAIN ?
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compo->vtg_main : compo->vtg_aux, &crtc->mode);
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/* a GDP is reserved to the CRTC FB */
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layer = to_sti_layer(crtc->primary);
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if (!layer) {
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DRM_ERROR("Can not find GDP0)\n");
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return -EINVAL;
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}
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/* copy the mode data adjusted by mode_fixup() into crtc->mode
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* so that hardware can be set to proper mode
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*/
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memcpy(&crtc->mode, adjusted_mode, sizeof(*adjusted_mode));
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res = sti_mixer_set_layer_depth(mixer, layer);
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if (res) {
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DRM_ERROR("Can not set layer depth\n");
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return -EINVAL;
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}
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res = sti_mixer_active_video_area(mixer, &crtc->mode);
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if (res) {
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DRM_ERROR("Can not set active video area\n");
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return -EINVAL;
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}
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w = crtc->primary->fb->width - x;
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h = crtc->primary->fb->height - y;
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return sti_layer_prepare(layer, crtc->primary->fb, &crtc->mode,
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mixer->id, 0, 0, w, h, x, y, w, h);
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}
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static int sti_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
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struct drm_framebuffer *old_fb)
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{
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struct sti_mixer *mixer = to_sti_mixer(crtc);
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struct sti_layer *layer;
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unsigned int w, h;
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int ret;
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DRM_DEBUG_KMS("CRTC:%d (%s) fb:%d (%d,%d)\n",
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crtc->base.id, sti_mixer_to_str(mixer),
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crtc->primary->fb->base.id, x, y);
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/* GDP is reserved to the CRTC FB */
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layer = to_sti_layer(crtc->primary);
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if (!layer) {
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DRM_ERROR("Can not find GDP0)\n");
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ret = -EINVAL;
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goto out;
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}
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w = crtc->primary->fb->width - crtc->x;
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h = crtc->primary->fb->height - crtc->y;
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ret = sti_layer_prepare(layer, crtc->primary->fb, &crtc->mode,
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mixer->id, 0, 0, w, h,
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crtc->x, crtc->y, w, h);
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if (ret) {
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DRM_ERROR("Can not prepare layer\n");
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goto out;
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}
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sti_drm_crtc_commit(crtc);
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out:
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return ret;
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}
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static void sti_drm_crtc_load_lut(struct drm_crtc *crtc)
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{
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/* do nothing */
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}
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static void sti_drm_crtc_disable(struct drm_crtc *crtc)
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{
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struct sti_mixer *mixer = to_sti_mixer(crtc);
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struct device *dev = mixer->dev;
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struct sti_compositor *compo = dev_get_drvdata(dev);
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struct sti_layer *layer;
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if (!compo->enable)
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return;
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DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer));
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/* Disable Background */
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sti_mixer_set_background_status(mixer, false);
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/* Disable GDP */
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layer = to_sti_layer(crtc->primary);
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if (!layer) {
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DRM_ERROR("Cannot find GDP0\n");
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return;
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}
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/* Disable layer at mixer level */
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if (sti_mixer_set_layer_status(mixer, layer, false))
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DRM_ERROR("Can not disable %s layer at mixer\n",
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sti_layer_to_str(layer));
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/* Wait a while to be sure that a Vsync event is received */
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msleep(WAIT_NEXT_VSYNC_MS);
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/* Then disable layer itself */
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sti_layer_disable(layer);
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drm_vblank_off(crtc->dev, mixer->id);
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/* Disable pixel clock and compo IP clocks */
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if (mixer->id == STI_MIXER_MAIN) {
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clk_disable_unprepare(compo->clk_pix_main);
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clk_disable_unprepare(compo->clk_compo_main);
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} else {
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clk_disable_unprepare(compo->clk_pix_aux);
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clk_disable_unprepare(compo->clk_compo_aux);
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}
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compo->enable = false;
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}
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static struct drm_crtc_helper_funcs sti_crtc_helper_funcs = {
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.dpms = sti_drm_crtc_dpms,
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.prepare = sti_drm_crtc_prepare,
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.commit = sti_drm_crtc_commit,
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.mode_fixup = sti_drm_crtc_mode_fixup,
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.mode_set = sti_drm_crtc_mode_set,
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.mode_set_base = sti_drm_crtc_mode_set_base,
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.load_lut = sti_drm_crtc_load_lut,
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.disable = sti_drm_crtc_disable,
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};
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static int sti_drm_crtc_page_flip(struct drm_crtc *crtc,
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struct drm_framebuffer *fb,
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struct drm_pending_vblank_event *event,
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uint32_t page_flip_flags)
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{
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struct drm_device *drm_dev = crtc->dev;
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struct drm_framebuffer *old_fb;
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struct sti_mixer *mixer = to_sti_mixer(crtc);
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unsigned long flags;
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int ret;
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DRM_DEBUG_KMS("fb %d --> fb %d\n",
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crtc->primary->fb->base.id, fb->base.id);
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mutex_lock(&drm_dev->struct_mutex);
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old_fb = crtc->primary->fb;
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crtc->primary->fb = fb;
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ret = sti_drm_crtc_mode_set_base(crtc, crtc->x, crtc->y, old_fb);
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if (ret) {
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DRM_ERROR("failed\n");
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crtc->primary->fb = old_fb;
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goto out;
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}
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if (event) {
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event->pipe = mixer->id;
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ret = drm_vblank_get(drm_dev, event->pipe);
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if (ret) {
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DRM_ERROR("Cannot get vblank\n");
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goto out;
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}
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spin_lock_irqsave(&drm_dev->event_lock, flags);
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if (mixer->pending_event) {
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drm_vblank_put(drm_dev, event->pipe);
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ret = -EBUSY;
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} else {
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mixer->pending_event = event;
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}
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spin_unlock_irqrestore(&drm_dev->event_lock, flags);
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}
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out:
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mutex_unlock(&drm_dev->struct_mutex);
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return ret;
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}
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static void sti_drm_crtc_destroy(struct drm_crtc *crtc)
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{
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DRM_DEBUG_KMS("\n");
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drm_crtc_cleanup(crtc);
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}
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static int sti_drm_crtc_set_property(struct drm_crtc *crtc,
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struct drm_property *property,
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uint64_t val)
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{
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DRM_DEBUG_KMS("\n");
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return 0;
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}
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int sti_drm_crtc_vblank_cb(struct notifier_block *nb,
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unsigned long event, void *data)
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{
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struct drm_device *drm_dev;
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struct sti_compositor *compo =
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container_of(nb, struct sti_compositor, vtg_vblank_nb);
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int *crtc = data;
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unsigned long flags;
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struct sti_drm_private *priv;
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drm_dev = compo->mixer[*crtc]->drm_crtc.dev;
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priv = drm_dev->dev_private;
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if ((event != VTG_TOP_FIELD_EVENT) &&
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(event != VTG_BOTTOM_FIELD_EVENT)) {
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DRM_ERROR("unknown event: %lu\n", event);
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return -EINVAL;
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}
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drm_handle_vblank(drm_dev, *crtc);
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spin_lock_irqsave(&drm_dev->event_lock, flags);
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if (compo->mixer[*crtc]->pending_event) {
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drm_send_vblank_event(drm_dev, -1,
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compo->mixer[*crtc]->pending_event);
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drm_vblank_put(drm_dev, *crtc);
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compo->mixer[*crtc]->pending_event = NULL;
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}
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spin_unlock_irqrestore(&drm_dev->event_lock, flags);
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return 0;
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}
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int sti_drm_crtc_enable_vblank(struct drm_device *dev, int crtc)
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{
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struct sti_drm_private *dev_priv = dev->dev_private;
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struct sti_compositor *compo = dev_priv->compo;
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struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;
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if (sti_vtg_register_client(crtc == STI_MIXER_MAIN ?
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compo->vtg_main : compo->vtg_aux,
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vtg_vblank_nb, crtc)) {
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DRM_ERROR("Cannot register VTG notifier\n");
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return -EINVAL;
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}
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return 0;
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}
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EXPORT_SYMBOL(sti_drm_crtc_enable_vblank);
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void sti_drm_crtc_disable_vblank(struct drm_device *dev, int crtc)
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{
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struct sti_drm_private *priv = dev->dev_private;
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struct sti_compositor *compo = priv->compo;
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struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;
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unsigned long flags;
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DRM_DEBUG_DRIVER("\n");
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if (sti_vtg_unregister_client(crtc == STI_MIXER_MAIN ?
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compo->vtg_main : compo->vtg_aux, vtg_vblank_nb))
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DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n");
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/* free the resources of the pending requests */
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spin_lock_irqsave(&dev->event_lock, flags);
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if (compo->mixer[crtc]->pending_event) {
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drm_vblank_put(dev, crtc);
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compo->mixer[crtc]->pending_event = NULL;
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}
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spin_unlock_irqrestore(&dev->event_lock, flags);
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}
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EXPORT_SYMBOL(sti_drm_crtc_disable_vblank);
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static struct drm_crtc_funcs sti_crtc_funcs = {
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.set_config = drm_crtc_helper_set_config,
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.page_flip = sti_drm_crtc_page_flip,
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.destroy = sti_drm_crtc_destroy,
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.set_property = sti_drm_crtc_set_property,
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};
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bool sti_drm_crtc_is_main(struct drm_crtc *crtc)
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{
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struct sti_mixer *mixer = to_sti_mixer(crtc);
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if (mixer->id == STI_MIXER_MAIN)
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return true;
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return false;
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}
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int sti_drm_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer,
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struct drm_plane *primary, struct drm_plane *cursor)
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{
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struct drm_crtc *crtc = &mixer->drm_crtc;
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int res;
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res = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor,
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&sti_crtc_funcs);
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if (res) {
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DRM_ERROR("Can not initialze CRTC\n");
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return -EINVAL;
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}
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drm_crtc_helper_add(crtc, &sti_crtc_helper_funcs);
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DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n",
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crtc->base.id, sti_mixer_to_str(mixer));
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return 0;
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}
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