1 files changed, 421 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..d2ae0c0e13be
--- /dev/null
+++ b/drivers/gpu/drm/sti/sti_drm_crtc.c
@@ -0,0 +1,421 @@
+/*
+ * 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 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;
+}