Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 256 insertions, 0 deletions

diff --git a/drivers/gpu/drm/sun4i/sun4i_crtc.c b/drivers/gpu/drm/sun4i/sun4i_crtc.c
new file mode 100644
index 000000000..c06d7cd45
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun4i_crtc.c
@@ -0,0 +1,256 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2015 Free Electrons
+ * Copyright (C) 2015 NextThing Co
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/ioport.h>
+#include <linux/of_address.h>
+#include <linux/of_graph.h>
+#include <linux/of_irq.h>
+#include <linux/regmap.h>
+
+#include <video/videomode.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_vblank.h>
+
+#include "sun4i_backend.h"
+#include "sun4i_crtc.h"
+#include "sun4i_drv.h"
+#include "sunxi_engine.h"
+#include "sun4i_tcon.h"
+
+/*
+ * While this isn't really working in the DRM theory, in practice we
+ * can only ever have one encoder per TCON since we have a mux in our
+ * TCON.
+ */
+static struct drm_encoder *sun4i_crtc_get_encoder(struct drm_crtc *crtc)
+{
+	struct drm_encoder *encoder;
+
+	drm_for_each_encoder(encoder, crtc->dev)
+		if (encoder->crtc == crtc)
+			return encoder;
+
+	return NULL;
+}
+
+static int sun4i_crtc_atomic_check(struct drm_crtc *crtc,
+				    struct drm_atomic_state *state)
+{
+	struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
+									  crtc);
+	struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
+	struct sunxi_engine *engine = scrtc->engine;
+	int ret = 0;
+
+	if (engine && engine->ops && engine->ops->atomic_check)
+		ret = engine->ops->atomic_check(engine, crtc_state);
+
+	return ret;
+}
+
+static void sun4i_crtc_atomic_begin(struct drm_crtc *crtc,
+				    struct drm_atomic_state *state)
+{
+	struct drm_crtc_state *old_state = drm_atomic_get_old_crtc_state(state,
+									 crtc);
+	struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
+	struct drm_device *dev = crtc->dev;
+	struct sunxi_engine *engine = scrtc->engine;
+	unsigned long flags;
+
+	if (crtc->state->event) {
+		WARN_ON(drm_crtc_vblank_get(crtc) != 0);
+
+		spin_lock_irqsave(&dev->event_lock, flags);
+		scrtc->event = crtc->state->event;
+		spin_unlock_irqrestore(&dev->event_lock, flags);
+		crtc->state->event = NULL;
+	}
+
+	if (engine->ops->atomic_begin)
+		engine->ops->atomic_begin(engine, old_state);
+}
+
+static void sun4i_crtc_atomic_flush(struct drm_crtc *crtc,
+				    struct drm_atomic_state *state)
+{
+	struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
+	struct drm_pending_vblank_event *event = crtc->state->event;
+
+	DRM_DEBUG_DRIVER("Committing plane changes\n");
+
+	sunxi_engine_commit(scrtc->engine);
+
+	if (event) {
+		crtc->state->event = NULL;
+
+		spin_lock_irq(&crtc->dev->event_lock);
+		if (drm_crtc_vblank_get(crtc) == 0)
+			drm_crtc_arm_vblank_event(crtc, event);
+		else
+			drm_crtc_send_vblank_event(crtc, event);
+		spin_unlock_irq(&crtc->dev->event_lock);
+	}
+}
+
+static void sun4i_crtc_atomic_disable(struct drm_crtc *crtc,
+				      struct drm_atomic_state *state)
+{
+	struct drm_encoder *encoder = sun4i_crtc_get_encoder(crtc);
+	struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
+
+	DRM_DEBUG_DRIVER("Disabling the CRTC\n");
+
+	drm_crtc_vblank_off(crtc);
+
+	sun4i_tcon_set_status(scrtc->tcon, encoder, false);
+
+	if (crtc->state->event && !crtc->state->active) {
+		spin_lock_irq(&crtc->dev->event_lock);
+		drm_crtc_send_vblank_event(crtc, crtc->state->event);
+		spin_unlock_irq(&crtc->dev->event_lock);
+
+		crtc->state->event = NULL;
+	}
+}
+
+static void sun4i_crtc_atomic_enable(struct drm_crtc *crtc,
+				     struct drm_atomic_state *state)
+{
+	struct drm_encoder *encoder = sun4i_crtc_get_encoder(crtc);
+	struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
+
+	DRM_DEBUG_DRIVER("Enabling the CRTC\n");
+
+	sun4i_tcon_set_status(scrtc->tcon, encoder, true);
+
+	drm_crtc_vblank_on(crtc);
+}
+
+static void sun4i_crtc_mode_set_nofb(struct drm_crtc *crtc)
+{
+	struct drm_display_mode *mode = &crtc->state->adjusted_mode;
+	struct drm_encoder *encoder = sun4i_crtc_get_encoder(crtc);
+	struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
+
+	sun4i_tcon_mode_set(scrtc->tcon, encoder, mode);
+	sunxi_engine_mode_set(scrtc->engine, mode);
+}
+
+static const struct drm_crtc_helper_funcs sun4i_crtc_helper_funcs = {
+	.atomic_check	= sun4i_crtc_atomic_check,
+	.atomic_begin	= sun4i_crtc_atomic_begin,
+	.atomic_flush	= sun4i_crtc_atomic_flush,
+	.atomic_enable	= sun4i_crtc_atomic_enable,
+	.atomic_disable	= sun4i_crtc_atomic_disable,
+	.mode_set_nofb	= sun4i_crtc_mode_set_nofb,
+};
+
+static int sun4i_crtc_enable_vblank(struct drm_crtc *crtc)
+{
+	struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
+
+	DRM_DEBUG_DRIVER("Enabling VBLANK on crtc %p\n", crtc);
+
+	sun4i_tcon_enable_vblank(scrtc->tcon, true);
+
+	return 0;
+}
+
+static void sun4i_crtc_disable_vblank(struct drm_crtc *crtc)
+{
+	struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
+
+	DRM_DEBUG_DRIVER("Disabling VBLANK on crtc %p\n", crtc);
+
+	sun4i_tcon_enable_vblank(scrtc->tcon, false);
+}
+
+static const struct drm_crtc_funcs sun4i_crtc_funcs = {
+	.atomic_destroy_state	= drm_atomic_helper_crtc_destroy_state,
+	.atomic_duplicate_state	= drm_atomic_helper_crtc_duplicate_state,
+	.destroy		= drm_crtc_cleanup,
+	.page_flip		= drm_atomic_helper_page_flip,
+	.reset			= drm_atomic_helper_crtc_reset,
+	.set_config		= drm_atomic_helper_set_config,
+	.enable_vblank		= sun4i_crtc_enable_vblank,
+	.disable_vblank		= sun4i_crtc_disable_vblank,
+};
+
+struct sun4i_crtc *sun4i_crtc_init(struct drm_device *drm,
+				   struct sunxi_engine *engine,
+				   struct sun4i_tcon *tcon)
+{
+	struct sun4i_crtc *scrtc;
+	struct drm_plane **planes;
+	struct drm_plane *primary = NULL, *cursor = NULL;
+	int ret, i;
+
+	scrtc = devm_kzalloc(drm->dev, sizeof(*scrtc), GFP_KERNEL);
+	if (!scrtc)
+		return ERR_PTR(-ENOMEM);
+	scrtc->engine = engine;
+	scrtc->tcon = tcon;
+
+	/* Create our layers */
+	planes = sunxi_engine_layers_init(drm, engine);
+	if (IS_ERR(planes)) {
+		dev_err(drm->dev, "Couldn't create the planes\n");
+		return NULL;
+	}
+
+	/* find primary and cursor planes for drm_crtc_init_with_planes */
+	for (i = 0; planes[i]; i++) {
+		struct drm_plane *plane = planes[i];
+
+		switch (plane->type) {
+		case DRM_PLANE_TYPE_PRIMARY:
+			primary = plane;
+			break;
+		case DRM_PLANE_TYPE_CURSOR:
+			cursor = plane;
+			break;
+		default:
+			break;
+		}
+	}
+
+	ret = drm_crtc_init_with_planes(drm, &scrtc->crtc,
+					primary,
+					cursor,
+					&sun4i_crtc_funcs,
+					NULL);
+	if (ret) {
+		dev_err(drm->dev, "Couldn't init DRM CRTC\n");
+		return ERR_PTR(ret);
+	}
+
+	drm_crtc_helper_add(&scrtc->crtc, &sun4i_crtc_helper_funcs);
+
+	/* Set crtc.port to output port node of the tcon */
+	scrtc->crtc.port = of_graph_get_port_by_id(scrtc->tcon->dev->of_node,
+						   1);
+
+	/* Set possible_crtcs to this crtc for overlay planes */
+	for (i = 0; planes[i]; i++) {
+		uint32_t possible_crtcs = drm_crtc_mask(&scrtc->crtc);
+		struct drm_plane *plane = planes[i];
+
+		if (plane->type == DRM_PLANE_TYPE_OVERLAY)
+			plane->possible_crtcs = possible_crtcs;
+	}
+
+	return scrtc;
+}