1 files changed, 273 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_plane.c b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
new file mode 100644
index 000000000..c4a0203d1
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
@@ -0,0 +1,273 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ * Author: CK Hu <ck.hu@mediatek.com>
+ */
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_atomic_uapi.h>
+#include <drm/drm_blend.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_gem_atomic_helper.h>
+
+#include "mtk_drm_crtc.h"
+#include "mtk_drm_ddp_comp.h"
+#include "mtk_drm_drv.h"
+#include "mtk_drm_gem.h"
+#include "mtk_drm_plane.h"
+
+static const u32 formats[] = {
+	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_ARGB8888,
+	DRM_FORMAT_BGRX8888,
+	DRM_FORMAT_BGRA8888,
+	DRM_FORMAT_ABGR8888,
+	DRM_FORMAT_XBGR8888,
+	DRM_FORMAT_RGB888,
+	DRM_FORMAT_BGR888,
+	DRM_FORMAT_RGB565,
+	DRM_FORMAT_UYVY,
+	DRM_FORMAT_YUYV,
+};
+
+static void mtk_plane_reset(struct drm_plane *plane)
+{
+	struct mtk_plane_state *state;
+
+	if (plane->state) {
+		__drm_atomic_helper_plane_destroy_state(plane->state);
+
+		state = to_mtk_plane_state(plane->state);
+		memset(state, 0, sizeof(*state));
+	} else {
+		state = kzalloc(sizeof(*state), GFP_KERNEL);
+		if (!state)
+			return;
+	}
+
+	__drm_atomic_helper_plane_reset(plane, &state->base);
+
+	state->base.plane = plane;
+	state->pending.format = DRM_FORMAT_RGB565;
+}
+
+static struct drm_plane_state *mtk_plane_duplicate_state(struct drm_plane *plane)
+{
+	struct mtk_plane_state *old_state = to_mtk_plane_state(plane->state);
+	struct mtk_plane_state *state;
+
+	state = kmalloc(sizeof(*state), GFP_KERNEL);
+	if (!state)
+		return NULL;
+
+	__drm_atomic_helper_plane_duplicate_state(plane, &state->base);
+
+	WARN_ON(state->base.plane != plane);
+
+	state->pending = old_state->pending;
+
+	return &state->base;
+}
+
+static void mtk_drm_plane_destroy_state(struct drm_plane *plane,
+					struct drm_plane_state *state)
+{
+	__drm_atomic_helper_plane_destroy_state(state);
+	kfree(to_mtk_plane_state(state));
+}
+
+static int mtk_plane_atomic_async_check(struct drm_plane *plane,
+					struct drm_atomic_state *state)
+{
+	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
+										 plane);
+	struct drm_crtc_state *crtc_state;
+	int ret;
+
+	if (plane != new_plane_state->crtc->cursor)
+		return -EINVAL;
+
+	if (!plane->state)
+		return -EINVAL;
+
+	if (!plane->state->fb)
+		return -EINVAL;
+
+	ret = mtk_drm_crtc_plane_check(new_plane_state->crtc, plane,
+				       to_mtk_plane_state(new_plane_state));
+	if (ret)
+		return ret;
+
+	if (state)
+		crtc_state = drm_atomic_get_existing_crtc_state(state,
+								new_plane_state->crtc);
+	else /* Special case for asynchronous cursor updates. */
+		crtc_state = new_plane_state->crtc->state;
+
+	return drm_atomic_helper_check_plane_state(plane->state, crtc_state,
+						   DRM_PLANE_NO_SCALING,
+						   DRM_PLANE_NO_SCALING,
+						   true, true);
+}
+
+static void mtk_plane_update_new_state(struct drm_plane_state *new_state,
+				       struct mtk_plane_state *mtk_plane_state)
+{
+	struct drm_framebuffer *fb = new_state->fb;
+	struct drm_gem_object *gem;
+	struct mtk_drm_gem_obj *mtk_gem;
+	unsigned int pitch, format;
+	dma_addr_t addr;
+
+	gem = fb->obj[0];
+	mtk_gem = to_mtk_gem_obj(gem);
+	addr = mtk_gem->dma_addr;
+	pitch = fb->pitches[0];
+	format = fb->format->format;
+
+	addr += (new_state->src.x1 >> 16) * fb->format->cpp[0];
+	addr += (new_state->src.y1 >> 16) * pitch;
+
+	mtk_plane_state->pending.enable = true;
+	mtk_plane_state->pending.pitch = pitch;
+	mtk_plane_state->pending.format = format;
+	mtk_plane_state->pending.addr = addr;
+	mtk_plane_state->pending.x = new_state->dst.x1;
+	mtk_plane_state->pending.y = new_state->dst.y1;
+	mtk_plane_state->pending.width = drm_rect_width(&new_state->dst);
+	mtk_plane_state->pending.height = drm_rect_height(&new_state->dst);
+	mtk_plane_state->pending.rotation = new_state->rotation;
+	mtk_plane_state->pending.color_encoding = new_state->color_encoding;
+}
+
+static void mtk_plane_atomic_async_update(struct drm_plane *plane,
+					  struct drm_atomic_state *state)
+{
+	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
+									   plane);
+	struct mtk_plane_state *new_plane_state = to_mtk_plane_state(plane->state);
+
+	plane->state->crtc_x = new_state->crtc_x;
+	plane->state->crtc_y = new_state->crtc_y;
+	plane->state->crtc_h = new_state->crtc_h;
+	plane->state->crtc_w = new_state->crtc_w;
+	plane->state->src_x = new_state->src_x;
+	plane->state->src_y = new_state->src_y;
+	plane->state->src_h = new_state->src_h;
+	plane->state->src_w = new_state->src_w;
+
+	mtk_plane_update_new_state(new_state, new_plane_state);
+	swap(plane->state->fb, new_state->fb);
+	wmb(); /* Make sure the above parameters are set before update */
+	new_plane_state->pending.async_dirty = true;
+	mtk_drm_crtc_async_update(new_state->crtc, plane, state);
+}
+
+static const struct drm_plane_funcs mtk_plane_funcs = {
+	.update_plane = drm_atomic_helper_update_plane,
+	.disable_plane = drm_atomic_helper_disable_plane,
+	.destroy = drm_plane_cleanup,
+	.reset = mtk_plane_reset,
+	.atomic_duplicate_state = mtk_plane_duplicate_state,
+	.atomic_destroy_state = mtk_drm_plane_destroy_state,
+};
+
+static int mtk_plane_atomic_check(struct drm_plane *plane,
+				  struct drm_atomic_state *state)
+{
+	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
+										 plane);
+	struct drm_framebuffer *fb = new_plane_state->fb;
+	struct drm_crtc_state *crtc_state;
+	int ret;
+
+	if (!fb)
+		return 0;
+
+	if (WARN_ON(!new_plane_state->crtc))
+		return 0;
+
+	ret = mtk_drm_crtc_plane_check(new_plane_state->crtc, plane,
+				       to_mtk_plane_state(new_plane_state));
+	if (ret)
+		return ret;
+
+	crtc_state = drm_atomic_get_crtc_state(state,
+					       new_plane_state->crtc);
+	if (IS_ERR(crtc_state))
+		return PTR_ERR(crtc_state);
+
+	return drm_atomic_helper_check_plane_state(new_plane_state,
+						   crtc_state,
+						   DRM_PLANE_NO_SCALING,
+						   DRM_PLANE_NO_SCALING,
+						   true, true);
+}
+
+static void mtk_plane_atomic_disable(struct drm_plane *plane,
+				     struct drm_atomic_state *state)
+{
+	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
+									   plane);
+	struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state);
+	mtk_plane_state->pending.enable = false;
+	wmb(); /* Make sure the above parameter is set before update */
+	mtk_plane_state->pending.dirty = true;
+}
+
+static void mtk_plane_atomic_update(struct drm_plane *plane,
+				    struct drm_atomic_state *state)
+{
+	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
+									   plane);
+	struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state);
+
+	if (!new_state->crtc || WARN_ON(!new_state->fb))
+		return;
+
+	if (!new_state->visible) {
+		mtk_plane_atomic_disable(plane, state);
+		return;
+	}
+
+	mtk_plane_update_new_state(new_state, mtk_plane_state);
+	wmb(); /* Make sure the above parameters are set before update */
+	mtk_plane_state->pending.dirty = true;
+}
+
+static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = {
+	.atomic_check = mtk_plane_atomic_check,
+	.atomic_update = mtk_plane_atomic_update,
+	.atomic_disable = mtk_plane_atomic_disable,
+	.atomic_async_update = mtk_plane_atomic_async_update,
+	.atomic_async_check = mtk_plane_atomic_async_check,
+};
+
+int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane,
+		   unsigned long possible_crtcs, enum drm_plane_type type,
+		   unsigned int supported_rotations)
+{
+	int err;
+
+	err = drm_universal_plane_init(dev, plane, possible_crtcs,
+				       &mtk_plane_funcs, formats,
+				       ARRAY_SIZE(formats), NULL, type, NULL);
+	if (err) {
+		DRM_ERROR("failed to initialize plane\n");
+		return err;
+	}
+
+	if (supported_rotations & ~DRM_MODE_ROTATE_0) {
+		err = drm_plane_create_rotation_property(plane,
+							 DRM_MODE_ROTATE_0,
+							 supported_rotations);
+		if (err)
+			DRM_INFO("Create rotation property failed\n");
+	}
+
+	drm_plane_helper_add(plane, &mtk_plane_helper_funcs);
+
+	return 0;
+}