1 files changed, 369 insertions, 0 deletions
diff --git a/drivers/gpu/drm/sti/sti_crtc.c b/drivers/gpu/drm/sti/sti_crtc.c
new file mode 100644
index 000000000..6f37c104c
--- /dev/null
+++ b/drivers/gpu/drm/sti/sti_crtc.c
@@ -0,0 +1,369 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) STMicroelectronics SA 2014
+ * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
+ *          Fabien Dessenne <fabien.dessenne@st.com>
+ *          for STMicroelectronics.
+ */
+
+#include <linux/clk.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_device.h>
+#include <drm/drm_plane_helper.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_vblank.h>
+
+#include "sti_compositor.h"
+#include "sti_crtc.h"
+#include "sti_drv.h"
+#include "sti_vid.h"
+#include "sti_vtg.h"
+
+static void sti_crtc_atomic_enable(struct drm_crtc *crtc,
+				   struct drm_crtc_state *old_state)
+{
+	struct sti_mixer *mixer = to_sti_mixer(crtc);
+
+	DRM_DEBUG_DRIVER("\n");
+
+	mixer->status = STI_MIXER_READY;
+
+	drm_crtc_vblank_on(crtc);
+}
+
+static void sti_crtc_atomic_disable(struct drm_crtc *crtc,
+				    struct drm_crtc_state *old_state)
+{
+	struct sti_mixer *mixer = to_sti_mixer(crtc);
+
+	DRM_DEBUG_DRIVER("\n");
+
+	mixer->status = STI_MIXER_DISABLING;
+
+	drm_crtc_wait_one_vblank(crtc);
+}
+
+static int
+sti_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode)
+{
+	struct sti_mixer *mixer = to_sti_mixer(crtc);
+	struct device *dev = mixer->dev;
+	struct sti_compositor *compo = dev_get_drvdata(dev);
+	struct clk *compo_clk, *pix_clk;
+	int rate = mode->clock * 1000;
+
+	DRM_DEBUG_KMS("CRTC:%d (%s) mode: (%s)\n",
+		      crtc->base.id, sti_mixer_to_str(mixer), mode->name);
+
+	DRM_DEBUG_KMS(DRM_MODE_FMT "\n", DRM_MODE_ARG(mode));
+
+	if (mixer->id == STI_MIXER_MAIN) {
+		compo_clk = compo->clk_compo_main;
+		pix_clk = compo->clk_pix_main;
+	} else {
+		compo_clk = compo->clk_compo_aux;
+		pix_clk = compo->clk_pix_aux;
+	}
+
+	/* Prepare and enable the compo IP clock */
+	if (clk_prepare_enable(compo_clk)) {
+		DRM_INFO("Failed to prepare/enable compositor clk\n");
+		goto compo_error;
+	}
+
+	/* Set rate and prepare/enable pixel clock */
+	if (clk_set_rate(pix_clk, rate) < 0) {
+		DRM_ERROR("Cannot set rate (%dHz) for pix clk\n", rate);
+		goto pix_error;
+	}
+	if (clk_prepare_enable(pix_clk)) {
+		DRM_ERROR("Failed to prepare/enable pix clk\n");
+		goto pix_error;
+	}
+
+	sti_vtg_set_config(compo->vtg[mixer->id], &crtc->mode);
+
+	if (sti_mixer_active_video_area(mixer, &crtc->mode)) {
+		DRM_ERROR("Can't set active video area\n");
+		goto mixer_error;
+	}
+
+	return 0;
+
+mixer_error:
+	clk_disable_unprepare(pix_clk);
+pix_error:
+	clk_disable_unprepare(compo_clk);
+compo_error:
+	return -EINVAL;
+}
+
+static void sti_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);
+
+	DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer));
+
+	/* Disable Background */
+	sti_mixer_set_background_status(mixer, false);
+
+	drm_crtc_vblank_off(crtc);
+
+	/* 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);
+	}
+
+	mixer->status = STI_MIXER_DISABLED;
+}
+
+static void
+sti_crtc_mode_set_nofb(struct drm_crtc *crtc)
+{
+	sti_crtc_mode_set(crtc, &crtc->state->adjusted_mode);
+}
+
+static void sti_crtc_atomic_flush(struct drm_crtc *crtc,
+				  struct drm_crtc_state *old_crtc_state)
+{
+	struct drm_device *drm_dev = crtc->dev;
+	struct sti_mixer *mixer = to_sti_mixer(crtc);
+	struct sti_compositor *compo = dev_get_drvdata(mixer->dev);
+	struct drm_plane *p;
+	struct drm_pending_vblank_event *event;
+	unsigned long flags;
+
+	DRM_DEBUG_DRIVER("\n");
+
+	/* perform plane actions */
+	list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
+		struct sti_plane *plane = to_sti_plane(p);
+
+		switch (plane->status) {
+		case STI_PLANE_UPDATED:
+			/* ignore update for other CRTC */
+			if (p->state->crtc != crtc)
+				continue;
+
+			/* update planes tag as updated */
+			DRM_DEBUG_DRIVER("update plane %s\n",
+					 sti_plane_to_str(plane));
+
+			if (sti_mixer_set_plane_depth(mixer, plane)) {
+				DRM_ERROR("Cannot set plane %s depth\n",
+					  sti_plane_to_str(plane));
+				break;
+			}
+
+			if (sti_mixer_set_plane_status(mixer, plane, true)) {
+				DRM_ERROR("Cannot enable plane %s at mixer\n",
+					  sti_plane_to_str(plane));
+				break;
+			}
+
+			/* if plane is HQVDP_0 then commit the vid[0] */
+			if (plane->desc == STI_HQVDP_0)
+				sti_vid_commit(compo->vid[0], p->state);
+
+			plane->status = STI_PLANE_READY;
+
+			break;
+		case STI_PLANE_DISABLING:
+			/* disabling sequence for planes tag as disabling */
+			DRM_DEBUG_DRIVER("disable plane %s from mixer\n",
+					 sti_plane_to_str(plane));
+
+			if (sti_mixer_set_plane_status(mixer, plane, false)) {
+				DRM_ERROR("Cannot disable plane %s at mixer\n",
+					  sti_plane_to_str(plane));
+				continue;
+			}
+
+			if (plane->desc == STI_CURSOR)
+				/* tag plane status for disabled */
+				plane->status = STI_PLANE_DISABLED;
+			else
+				/* tag plane status for flushing */
+				plane->status = STI_PLANE_FLUSHING;
+
+			/* if plane is HQVDP_0 then disable the vid[0] */
+			if (plane->desc == STI_HQVDP_0)
+				sti_vid_disable(compo->vid[0]);
+
+			break;
+		default:
+			/* Other status case are not handled */
+			break;
+		}
+	}
+
+	event = crtc->state->event;
+	if (event) {
+		crtc->state->event = NULL;
+
+		spin_lock_irqsave(&crtc->dev->event_lock, flags);
+		if (drm_crtc_vblank_get(crtc) == 0)
+			drm_crtc_arm_vblank_event(crtc, event);
+		else
+			drm_crtc_send_vblank_event(crtc, event);
+		spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
+	}
+}
+
+static const struct drm_crtc_helper_funcs sti_crtc_helper_funcs = {
+	.mode_set_nofb = sti_crtc_mode_set_nofb,
+	.atomic_flush = sti_crtc_atomic_flush,
+	.atomic_enable = sti_crtc_atomic_enable,
+	.atomic_disable = sti_crtc_atomic_disable,
+};
+
+static void sti_crtc_destroy(struct drm_crtc *crtc)
+{
+	DRM_DEBUG_KMS("\n");
+	drm_crtc_cleanup(crtc);
+}
+
+static int sti_crtc_set_property(struct drm_crtc *crtc,
+				 struct drm_property *property,
+				 uint64_t val)
+{
+	DRM_DEBUG_KMS("\n");
+	return 0;
+}
+
+int sti_crtc_vblank_cb(struct notifier_block *nb,
+		       unsigned long event, void *data)
+{
+	struct sti_compositor *compo;
+	struct drm_crtc *crtc = data;
+	struct sti_mixer *mixer;
+	unsigned int pipe;
+
+	pipe = drm_crtc_index(crtc);
+	compo = container_of(nb, struct sti_compositor, vtg_vblank_nb[pipe]);
+	mixer = compo->mixer[pipe];
+
+	if ((event != VTG_TOP_FIELD_EVENT) &&
+	    (event != VTG_BOTTOM_FIELD_EVENT)) {
+		DRM_ERROR("unknown event: %lu\n", event);
+		return -EINVAL;
+	}
+
+	drm_crtc_handle_vblank(crtc);
+
+	if (mixer->status == STI_MIXER_DISABLING) {
+		struct drm_plane *p;
+
+		/* Disable mixer only if all overlay planes (GDP and VDP)
+		 * are disabled */
+		list_for_each_entry(p, &crtc->dev->mode_config.plane_list,
+				    head) {
+			struct sti_plane *plane = to_sti_plane(p);
+
+			if ((plane->desc & STI_PLANE_TYPE_MASK) <= STI_VDP)
+				if (plane->status != STI_PLANE_DISABLED)
+					return 0;
+		}
+		sti_crtc_disable(crtc);
+	}
+
+	return 0;
+}
+
+static int sti_crtc_enable_vblank(struct drm_crtc *crtc)
+{
+	struct drm_device *dev = crtc->dev;
+	unsigned int pipe = crtc->index;
+	struct sti_private *dev_priv = dev->dev_private;
+	struct sti_compositor *compo = dev_priv->compo;
+	struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb[pipe];
+	struct sti_vtg *vtg = compo->vtg[pipe];
+
+	DRM_DEBUG_DRIVER("\n");
+
+	if (sti_vtg_register_client(vtg, vtg_vblank_nb, crtc)) {
+		DRM_ERROR("Cannot register VTG notifier\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static void sti_crtc_disable_vblank(struct drm_crtc *crtc)
+{
+	struct drm_device *drm_dev = crtc->dev;
+	unsigned int pipe = crtc->index;
+	struct sti_private *priv = drm_dev->dev_private;
+	struct sti_compositor *compo = priv->compo;
+	struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb[pipe];
+	struct sti_vtg *vtg = compo->vtg[pipe];
+
+	DRM_DEBUG_DRIVER("\n");
+
+	if (sti_vtg_unregister_client(vtg, vtg_vblank_nb))
+		DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n");
+}
+
+static int sti_crtc_late_register(struct drm_crtc *crtc)
+{
+	struct sti_mixer *mixer = to_sti_mixer(crtc);
+	struct sti_compositor *compo = dev_get_drvdata(mixer->dev);
+
+	if (drm_crtc_index(crtc) == 0)
+		sti_compositor_debugfs_init(compo, crtc->dev->primary);
+
+	return 0;
+}
+
+static const struct drm_crtc_funcs sti_crtc_funcs = {
+	.set_config = drm_atomic_helper_set_config,
+	.page_flip = drm_atomic_helper_page_flip,
+	.destroy = sti_crtc_destroy,
+	.set_property = sti_crtc_set_property,
+	.reset = drm_atomic_helper_crtc_reset,
+	.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
+	.late_register = sti_crtc_late_register,
+	.enable_vblank = sti_crtc_enable_vblank,
+	.disable_vblank = sti_crtc_disable_vblank,
+};
+
+bool sti_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_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, NULL);
+	if (res) {
+		DRM_ERROR("Can't initialize 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;
+}