drm: sti: Add DRM driver itself
Make the link between all the hardware drivers and DRM/KMS interface.
Create the driver itself and make it register all the sub-components.
Use GEM CMA helpers for buffer allocation.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Reviewed-by: Rob Clark <robdclark@gmail.com>
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 0000000..6eba648
--- /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;
+}