1 files changed, 423 insertions, 0 deletions

diff --git a/drivers/gpu/drm/sti/sti_drm_crtc.c b/drivers/gpu/drm/sti/sti_drm_crtc.c
new file mode 100644
index 000000000000..6eba648cf7b3
--- /dev/null
+++ b/drivers/gpu/drm/sti/sti_drm_crtc.c
@@ -0,0 +1,423 @@
+/*
+ * Copyright (C) STMicroelectronics SA 2014
+ * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
+ *          Fabien Dessenne <fabien.dessenne@st.com>
+ *          for STMicroelectronics.
+ * License terms:  GNU General Public License (GPL), version 2
+ */
+
+#include <linux/clk.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
+
+#include "sti_compositor.h"
+#include "sti_drm_drv.h"
+#include "sti_drm_crtc.h"
+#include "sti_vtg.h"
+
+static void sti_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
+{
+	DRM_DEBUG_KMS("\n");
+}
+
+static void sti_drm_crtc_prepare(struct drm_crtc *crtc)
+{
+	struct sti_mixer *mixer = to_sti_mixer(crtc);
+	struct device *dev = mixer->dev;
+	struct sti_compositor *compo = dev_get_drvdata(dev);
+
+	compo->enable = true;
+
+	/* Prepare and enable the compo IP clock */
+	if (mixer->id == STI_MIXER_MAIN) {
+		if (clk_prepare_enable(compo->clk_compo_main))
+			DRM_INFO("Failed to prepare/enable compo_main clk\n");
+	} else {
+		if (clk_prepare_enable(compo->clk_compo_aux))
+			DRM_INFO("Failed to prepare/enable compo_aux clk\n");
+	}
+}
+
+static void sti_drm_crtc_commit(struct drm_crtc *crtc)
+{
+	struct sti_mixer *mixer = to_sti_mixer(crtc);
+	struct device *dev = mixer->dev;
+	struct sti_compositor *compo = dev_get_drvdata(dev);
+	struct sti_layer *layer;
+
+	if ((!mixer || !compo)) {
+		DRM_ERROR("Can not find mixer or compositor)\n");
+		return;
+	}
+
+	/* get GDP which is reserved to the CRTC FB */
+	layer = to_sti_layer(crtc->primary);
+	if (layer)
+		sti_layer_commit(layer);
+	else
+		DRM_ERROR("Can not find CRTC dedicated plane (GDP0)\n");
+
+	/* Enable layer on mixer */
+	if (sti_mixer_set_layer_status(mixer, layer, true))
+		DRM_ERROR("Can not enable layer at mixer\n");
+}
+
+static bool sti_drm_crtc_mode_fixup(struct drm_crtc *crtc,
+				    const struct drm_display_mode *mode,
+				    struct drm_display_mode *adjusted_mode)
+{
+	/* accept the provided drm_display_mode, do not fix it up */
+	return true;
+}
+
+static int
+sti_drm_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
+		      struct drm_display_mode *adjusted_mode, int x, int y,
+		      struct drm_framebuffer *old_fb)
+{
+	struct sti_mixer *mixer = to_sti_mixer(crtc);
+	struct device *dev = mixer->dev;
+	struct sti_compositor *compo = dev_get_drvdata(dev);
+	struct sti_layer *layer;
+	struct clk *clk;
+	int rate = mode->clock * 1000;
+	int res;
+	unsigned int w, h;
+
+	DRM_DEBUG_KMS("CRTC:%d (%s) fb:%d mode:%d (%s)\n",
+		      crtc->base.id, sti_mixer_to_str(mixer),
+		      crtc->primary->fb->base.id, mode->base.id, mode->name);
+
+	DRM_DEBUG_KMS("%d %d %d %d %d %d %d %d %d %d 0x%x 0x%x\n",
+		      mode->vrefresh, mode->clock,
+		      mode->hdisplay,
+		      mode->hsync_start, mode->hsync_end,
+		      mode->htotal,
+		      mode->vdisplay,
+		      mode->vsync_start, mode->vsync_end,
+		      mode->vtotal, mode->type, mode->flags);
+
+	/* Set rate and prepare/enable pixel clock */
+	if (mixer->id == STI_MIXER_MAIN)
+		clk = compo->clk_pix_main;
+	else
+		clk = compo->clk_pix_aux;
+
+	res = clk_set_rate(clk, rate);
+	if (res < 0) {
+		DRM_ERROR("Cannot set rate (%dHz) for pix clk\n", rate);
+		return -EINVAL;
+	}
+	if (clk_prepare_enable(clk)) {
+		DRM_ERROR("Failed to prepare/enable pix clk\n");
+		return -EINVAL;
+	}
+
+	sti_vtg_set_config(mixer->id == STI_MIXER_MAIN ?
+			compo->vtg_main : compo->vtg_aux, &crtc->mode);
+
+	/* a GDP is reserved to the CRTC FB */
+	layer = to_sti_layer(crtc->primary);
+	if (!layer) {
+		DRM_ERROR("Can not find GDP0)\n");
+		return -EINVAL;
+	}
+
+	/* copy the mode data adjusted by mode_fixup() into crtc->mode
+	 * so that hardware can be set to proper mode
+	 */
+	memcpy(&crtc->mode, adjusted_mode, sizeof(*adjusted_mode));
+
+	res = sti_mixer_set_layer_depth(mixer, layer);
+	if (res) {
+		DRM_ERROR("Can not set layer depth\n");
+		return -EINVAL;
+	}
+	res = sti_mixer_active_video_area(mixer, &crtc->mode);
+	if (res) {
+		DRM_ERROR("Can not set active video area\n");
+		return -EINVAL;
+	}
+
+	w = crtc->primary->fb->width - x;
+	h = crtc->primary->fb->height - y;
+
+	return sti_layer_prepare(layer, crtc->primary->fb, &crtc->mode,
+			mixer->id, 0, 0, w, h, x, y, w, h);
+}
+
+static int sti_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
+				      struct drm_framebuffer *old_fb)
+{
+	struct sti_mixer *mixer = to_sti_mixer(crtc);
+	struct device *dev = mixer->dev;
+	struct sti_compositor *compo = dev_get_drvdata(dev);
+	struct sti_layer *layer;
+	unsigned int w, h;
+	int ret;
+
+	DRM_DEBUG_KMS("CRTC:%d (%s) fb:%d (%d,%d)\n",
+		      crtc->base.id, sti_mixer_to_str(mixer),
+		      crtc->primary->fb->base.id, x, y);
+
+	/* GDP is reserved to the CRTC FB */
+	layer = to_sti_layer(crtc->primary);
+	if (!layer) {
+		DRM_ERROR("Can not find GDP0)\n");
+		ret = -EINVAL;
+		goto out;
+	}
+
+	w = crtc->primary->fb->width - crtc->x;
+	h = crtc->primary->fb->height - crtc->y;
+
+	ret = sti_layer_prepare(layer, crtc->primary->fb, &crtc->mode,
+				mixer->id, 0, 0, w, h,
+				crtc->x, crtc->y, w, h);
+	if (ret) {
+		DRM_ERROR("Can not prepare layer\n");
+		goto out;
+	}
+
+	sti_drm_crtc_commit(crtc);
+out:
+	return ret;
+}
+
+static void sti_drm_crtc_load_lut(struct drm_crtc *crtc)
+{
+	/* do nothing */
+}
+
+static void sti_drm_crtc_disable(struct drm_crtc *crtc)
+{
+	struct sti_mixer *mixer = to_sti_mixer(crtc);
+	struct device *dev = mixer->dev;
+	struct sti_compositor *compo = dev_get_drvdata(dev);
+	struct sti_layer *layer;
+
+	if (!compo->enable)
+		return;
+
+	DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer));
+
+	/* Disable Background */
+	sti_mixer_set_background_status(mixer, false);
+
+	/* Disable GDP */
+	layer = to_sti_layer(crtc->primary);
+	if (!layer) {
+		DRM_ERROR("Cannot find GDP0\n");
+		return;
+	}
+
+	/* Disable layer at mixer level */
+	if (sti_mixer_set_layer_status(mixer, layer, false))
+		DRM_ERROR("Can not disable %s layer at mixer\n",
+				sti_layer_to_str(layer));
+
+	/* Wait a while to be sure that a Vsync event is received */
+	msleep(WAIT_NEXT_VSYNC_MS);
+
+	/* Then disable layer itself */
+	sti_layer_disable(layer);
+
+	drm_vblank_off(crtc->dev, mixer->id);
+
+	/* Disable pixel clock and compo IP clocks */
+	if (mixer->id == STI_MIXER_MAIN) {
+		clk_disable_unprepare(compo->clk_pix_main);
+		clk_disable_unprepare(compo->clk_compo_main);
+	} else {
+		clk_disable_unprepare(compo->clk_pix_aux);
+		clk_disable_unprepare(compo->clk_compo_aux);
+	}
+
+	compo->enable = false;
+}
+
+static struct drm_crtc_helper_funcs sti_crtc_helper_funcs = {
+	.dpms = sti_drm_crtc_dpms,
+	.prepare = sti_drm_crtc_prepare,
+	.commit = sti_drm_crtc_commit,
+	.mode_fixup = sti_drm_crtc_mode_fixup,
+	.mode_set = sti_drm_crtc_mode_set,
+	.mode_set_base = sti_drm_crtc_mode_set_base,
+	.load_lut = sti_drm_crtc_load_lut,
+	.disable = sti_drm_crtc_disable,
+};
+
+static int sti_drm_crtc_page_flip(struct drm_crtc *crtc,
+				  struct drm_framebuffer *fb,
+				  struct drm_pending_vblank_event *event,
+				  uint32_t page_flip_flags)
+{
+	struct drm_device *drm_dev = crtc->dev;
+	struct drm_framebuffer *old_fb;
+	struct sti_mixer *mixer = to_sti_mixer(crtc);
+	unsigned long flags;
+	int ret;
+
+	DRM_DEBUG_KMS("fb %d --> fb %d\n",
+			crtc->primary->fb->base.id, fb->base.id);
+
+	mutex_lock(&drm_dev->struct_mutex);
+
+	old_fb = crtc->primary->fb;
+	crtc->primary->fb = fb;
+	ret = sti_drm_crtc_mode_set_base(crtc, crtc->x, crtc->y, old_fb);
+	if (ret) {
+		DRM_ERROR("failed\n");
+		crtc->primary->fb = old_fb;
+		goto out;
+	}
+
+	if (event) {
+		event->pipe = mixer->id;
+
+		ret = drm_vblank_get(drm_dev, event->pipe);
+		if (ret) {
+			DRM_ERROR("Cannot get vblank\n");
+			goto out;
+		}
+
+		spin_lock_irqsave(&drm_dev->event_lock, flags);
+		if (mixer->pending_event) {
+			drm_vblank_put(drm_dev, event->pipe);
+			ret = -EBUSY;
+		} else {
+			mixer->pending_event = event;
+		}
+		spin_unlock_irqrestore(&drm_dev->event_lock, flags);
+	}
+out:
+	mutex_unlock(&drm_dev->struct_mutex);
+	return ret;
+}
+
+static void sti_drm_crtc_destroy(struct drm_crtc *crtc)
+{
+	DRM_DEBUG_KMS("\n");
+	drm_crtc_cleanup(crtc);
+}
+
+static int sti_drm_crtc_set_property(struct drm_crtc *crtc,
+				     struct drm_property *property,
+				     uint64_t val)
+{
+	DRM_DEBUG_KMS("\n");
+	return 0;
+}
+
+int sti_drm_crtc_vblank_cb(struct notifier_block *nb,
+			   unsigned long event, void *data)
+{
+	struct drm_device *drm_dev;
+	struct sti_compositor *compo =
+		container_of(nb, struct sti_compositor, vtg_vblank_nb);
+	int *crtc = data;
+	unsigned long flags;
+	struct sti_drm_private *priv;
+
+	drm_dev = compo->mixer[*crtc]->drm_crtc.dev;
+	priv = drm_dev->dev_private;
+
+	if ((event != VTG_TOP_FIELD_EVENT) &&
+	    (event != VTG_BOTTOM_FIELD_EVENT)) {
+		DRM_ERROR("unknown event: %lu\n", event);
+		return -EINVAL;
+	}
+
+	drm_handle_vblank(drm_dev, *crtc);
+
+	spin_lock_irqsave(&drm_dev->event_lock, flags);
+	if (compo->mixer[*crtc]->pending_event) {
+		drm_send_vblank_event(drm_dev, -1,
+				compo->mixer[*crtc]->pending_event);
+		drm_vblank_put(drm_dev, *crtc);
+		compo->mixer[*crtc]->pending_event = NULL;
+	}
+	spin_unlock_irqrestore(&drm_dev->event_lock, flags);
+
+	return 0;
+}
+
+int sti_drm_crtc_enable_vblank(struct drm_device *dev, int crtc)
+{
+	struct sti_drm_private *dev_priv = dev->dev_private;
+	struct sti_compositor *compo = dev_priv->compo;
+	struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;
+
+	if (sti_vtg_register_client(crtc == STI_MIXER_MAIN ?
+			compo->vtg_main : compo->vtg_aux,
+			vtg_vblank_nb, crtc)) {
+		DRM_ERROR("Cannot register VTG notifier\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(sti_drm_crtc_enable_vblank);
+
+void sti_drm_crtc_disable_vblank(struct drm_device *dev, int crtc)
+{
+	struct sti_drm_private *priv = dev->dev_private;
+	struct sti_compositor *compo = priv->compo;
+	struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;
+	unsigned long flags;
+
+	DRM_DEBUG_DRIVER("\n");
+
+	if (sti_vtg_unregister_client(crtc == STI_MIXER_MAIN ?
+			compo->vtg_main : compo->vtg_aux, vtg_vblank_nb))
+		DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n");
+
+	/* free the resources of the pending requests */
+	spin_lock_irqsave(&dev->event_lock, flags);
+	if (compo->mixer[crtc]->pending_event) {
+		drm_vblank_put(dev, crtc);
+		compo->mixer[crtc]->pending_event = NULL;
+	}
+	spin_unlock_irqrestore(&dev->event_lock, flags);
+
+}
+EXPORT_SYMBOL(sti_drm_crtc_disable_vblank);
+
+static struct drm_crtc_funcs sti_crtc_funcs = {
+	.set_config = drm_crtc_helper_set_config,
+	.page_flip = sti_drm_crtc_page_flip,
+	.destroy = sti_drm_crtc_destroy,
+	.set_property = sti_drm_crtc_set_property,
+};
+
+bool sti_drm_crtc_is_main(struct drm_crtc *crtc)
+{
+	struct sti_mixer *mixer = to_sti_mixer(crtc);
+
+	if (mixer->id == STI_MIXER_MAIN)
+		return true;
+
+	return false;
+}
+
+int sti_drm_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer,
+		struct drm_plane *primary, struct drm_plane *cursor)
+{
+	struct drm_crtc *crtc = &mixer->drm_crtc;
+	int res;
+
+	res = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor,
+			&sti_crtc_funcs);
+	if (res) {
+		DRM_ERROR("Can not initialze CRTC\n");
+		return -EINVAL;
+	}
+
+	drm_crtc_helper_add(crtc, &sti_crtc_helper_funcs);
+
+	DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n",
+			 crtc->base.id, sti_mixer_to_str(mixer));
+
+	return 0;
+}