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-rw-r--r--drivers/gpu/drm/exynos/exynos_drm_crtc.c146
-rw-r--r--drivers/gpu/drm/exynos/exynos_drm_crtc.h29
-rw-r--r--drivers/gpu/drm/exynos/exynos_drm_encoder.c66
-rw-r--r--drivers/gpu/drm/exynos/exynos_drm_encoder.h8
-rw-r--r--drivers/gpu/drm/exynos/exynos_drm_plane.c117
-rw-r--r--drivers/gpu/drm/exynos/exynos_drm_plane.h7
6 files changed, 151 insertions, 222 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
index eaf6fb5..7f65842 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
@@ -30,10 +30,7 @@
#include "drm_crtc_helper.h"
#include "exynos_drm_drv.h"
-#include "exynos_drm_crtc.h"
-#include "exynos_drm_fb.h"
#include "exynos_drm_encoder.h"
-#include "exynos_drm_gem.h"
#include "exynos_drm_plane.h"
#define to_exynos_crtc(x) container_of(x, struct exynos_drm_crtc,\
@@ -60,107 +57,6 @@ struct exynos_drm_crtc {
unsigned int dpms;
};
-static void exynos_drm_crtc_apply(struct drm_crtc *crtc)
-{
- struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
- struct exynos_drm_overlay *overlay =
- get_exynos_drm_overlay(exynos_crtc->plane);
-
- exynos_drm_fn_encoder(crtc, overlay,
- exynos_drm_encoder_crtc_mode_set);
- exynos_drm_fn_encoder(crtc, NULL, exynos_drm_encoder_crtc_commit);
-}
-
-int exynos_drm_overlay_update(struct exynos_drm_overlay *overlay,
- struct drm_framebuffer *fb,
- struct drm_display_mode *mode,
- struct exynos_drm_crtc_pos *pos)
-{
- struct exynos_drm_gem_buf *buffer;
- unsigned int actual_w;
- unsigned int actual_h;
- int nr = exynos_drm_format_num_buffers(fb->pixel_format);
- int i;
-
- for (i = 0; i < nr; i++) {
- buffer = exynos_drm_fb_buffer(fb, i);
- if (!buffer) {
- DRM_LOG_KMS("buffer is null\n");
- return -EFAULT;
- }
-
- overlay->dma_addr[i] = buffer->dma_addr;
- overlay->vaddr[i] = buffer->kvaddr;
-
- DRM_DEBUG_KMS("buffer: %d, vaddr = 0x%lx, dma_addr = 0x%lx\n",
- i, (unsigned long)overlay->vaddr[i],
- (unsigned long)overlay->dma_addr[i]);
- }
-
- actual_w = min((mode->hdisplay - pos->crtc_x), pos->crtc_w);
- actual_h = min((mode->vdisplay - pos->crtc_y), pos->crtc_h);
-
- /* set drm framebuffer data. */
- overlay->fb_x = pos->fb_x;
- overlay->fb_y = pos->fb_y;
- overlay->fb_width = fb->width;
- overlay->fb_height = fb->height;
- overlay->src_width = pos->src_w;
- overlay->src_height = pos->src_h;
- overlay->bpp = fb->bits_per_pixel;
- overlay->pitch = fb->pitches[0];
- overlay->pixel_format = fb->pixel_format;
-
- /* set overlay range to be displayed. */
- overlay->crtc_x = pos->crtc_x;
- overlay->crtc_y = pos->crtc_y;
- overlay->crtc_width = actual_w;
- overlay->crtc_height = actual_h;
-
- /* set drm mode data. */
- overlay->mode_width = mode->hdisplay;
- overlay->mode_height = mode->vdisplay;
- overlay->refresh = mode->vrefresh;
- overlay->scan_flag = mode->flags;
-
- DRM_DEBUG_KMS("overlay : offset_x/y(%d,%d), width/height(%d,%d)",
- overlay->crtc_x, overlay->crtc_y,
- overlay->crtc_width, overlay->crtc_height);
-
- return 0;
-}
-
-static int exynos_drm_crtc_update(struct drm_crtc *crtc)
-{
- struct exynos_drm_crtc *exynos_crtc;
- struct exynos_drm_overlay *overlay;
- struct exynos_drm_crtc_pos pos;
- struct drm_display_mode *mode = &crtc->mode;
- struct drm_framebuffer *fb = crtc->fb;
-
- if (!mode || !fb)
- return -EINVAL;
-
- exynos_crtc = to_exynos_crtc(crtc);
- overlay = get_exynos_drm_overlay(exynos_crtc->plane);
-
- memset(&pos, 0, sizeof(struct exynos_drm_crtc_pos));
-
- /* it means the offset of framebuffer to be displayed. */
- pos.fb_x = crtc->x;
- pos.fb_y = crtc->y;
-
- /* OSD position to be displayed. */
- pos.crtc_x = 0;
- pos.crtc_y = 0;
- pos.crtc_w = fb->width - crtc->x;
- pos.crtc_h = fb->height - crtc->y;
- pos.src_w = pos.crtc_w;
- pos.src_h = pos.crtc_h;
-
- return exynos_drm_overlay_update(overlay, crtc->fb, mode, &pos);
-}
-
static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
{
struct drm_device *dev = crtc->dev;
@@ -231,7 +127,7 @@ static void exynos_drm_crtc_commit(struct drm_crtc *crtc)
exynos_drm_encoder_dpms_from_crtc);
}
- exynos_drm_fn_encoder(crtc, NULL, exynos_drm_encoder_crtc_commit);
+ exynos_plane_commit(exynos_crtc->plane);
}
static bool
@@ -251,8 +147,9 @@ exynos_drm_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
struct drm_framebuffer *old_fb)
{
struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
- struct exynos_drm_overlay *overlay =
- get_exynos_drm_overlay(exynos_crtc->plane);
+ struct drm_plane *plane = exynos_crtc->plane;
+ unsigned int crtc_w;
+ unsigned int crtc_h;
int pipe = exynos_crtc->pipe;
int ret;
@@ -264,11 +161,17 @@ exynos_drm_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
*/
memcpy(&crtc->mode, adjusted_mode, sizeof(*adjusted_mode));
- ret = exynos_drm_crtc_update(crtc);
+ crtc_w = crtc->fb->width - x;
+ crtc_h = crtc->fb->height - y;
+
+ ret = exynos_plane_mode_set(plane, crtc, crtc->fb, 0, 0, crtc_w, crtc_h,
+ x, y, crtc_w, crtc_h);
if (ret)
return ret;
- exynos_drm_fn_encoder(crtc, overlay, exynos_drm_encoder_crtc_mode_set);
+ plane->crtc = crtc;
+ plane->fb = crtc->fb;
+
exynos_drm_fn_encoder(crtc, &pipe, exynos_drm_encoder_crtc_pipe);
return 0;
@@ -277,17 +180,25 @@ exynos_drm_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
static int exynos_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
struct drm_framebuffer *old_fb)
{
+ struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
+ struct drm_plane *plane = exynos_crtc->plane;
+ unsigned int crtc_w;
+ unsigned int crtc_h;
int ret;
DRM_DEBUG_KMS("%s\n", __FILE__);
- ret = exynos_drm_crtc_update(crtc);
+ crtc_w = crtc->fb->width - x;
+ crtc_h = crtc->fb->height - y;
+
+ ret = exynos_plane_mode_set(plane, crtc, crtc->fb, 0, 0, crtc_w, crtc_h,
+ x, y, crtc_w, crtc_h);
if (ret)
return ret;
- exynos_drm_crtc_apply(crtc);
+ exynos_plane_commit(exynos_crtc->plane);
- return ret;
+ return 0;
}
static void exynos_drm_crtc_load_lut(struct drm_crtc *crtc)
@@ -339,7 +250,8 @@ static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc,
&dev_priv->pageflip_event_list);
crtc->fb = fb;
- ret = exynos_drm_crtc_update(crtc);
+ ret = exynos_drm_crtc_mode_set_base(crtc, crtc->x, crtc->y,
+ NULL);
if (ret) {
crtc->fb = old_fb;
drm_vblank_put(dev, exynos_crtc->pipe);
@@ -347,14 +259,6 @@ static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc,
goto out;
}
-
- /*
- * the values related to a buffer of the drm framebuffer
- * to be applied should be set at here. because these values
- * first, are set to shadow registers and then to
- * real registers at vsync front porch period.
- */
- exynos_drm_crtc_apply(crtc);
}
out:
mutex_unlock(&dev->struct_mutex);
diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.h b/drivers/gpu/drm/exynos/exynos_drm_crtc.h
index b1c6e83..6bae8d8 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.h
@@ -33,33 +33,4 @@ int exynos_drm_crtc_create(struct drm_device *dev, unsigned int nr);
int exynos_drm_crtc_enable_vblank(struct drm_device *dev, int crtc);
void exynos_drm_crtc_disable_vblank(struct drm_device *dev, int crtc);
-/*
- * Exynos specific crtc postion structure.
- *
- * @fb_x: offset x on a framebuffer to be displyed
- * - the unit is screen coordinates.
- * @fb_y: offset y on a framebuffer to be displayed
- * - the unit is screen coordinates.
- * @src_w: width of source area to be displayed from a framebuffer.
- * @src_h: height of source area to be displayed from a framebuffer.
- * @crtc_x: offset x on hardware screen.
- * @crtc_y: offset y on hardware screen.
- * @crtc_w: width of hardware screen.
- * @crtc_h: height of hardware screen.
- */
-struct exynos_drm_crtc_pos {
- unsigned int fb_x;
- unsigned int fb_y;
- unsigned int src_w;
- unsigned int src_h;
- unsigned int crtc_x;
- unsigned int crtc_y;
- unsigned int crtc_w;
- unsigned int crtc_h;
-};
-
-int exynos_drm_overlay_update(struct exynos_drm_overlay *overlay,
- struct drm_framebuffer *fb,
- struct drm_display_mode *mode,
- struct exynos_drm_crtc_pos *pos);
#endif
diff --git a/drivers/gpu/drm/exynos/exynos_drm_encoder.c b/drivers/gpu/drm/exynos/exynos_drm_encoder.c
index 33f3c41..c25bd48 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_encoder.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_encoder.c
@@ -323,30 +323,6 @@ void exynos_drm_disable_vblank(struct drm_encoder *encoder, void *data)
manager_ops->disable_vblank(manager->dev);
}
-void exynos_drm_encoder_crtc_plane_commit(struct drm_encoder *encoder,
- void *data)
-{
- struct exynos_drm_manager *manager =
- to_exynos_encoder(encoder)->manager;
- struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
- int zpos = DEFAULT_ZPOS;
-
- if (data)
- zpos = *(int *)data;
-
- if (overlay_ops && overlay_ops->commit)
- overlay_ops->commit(manager->dev, zpos);
-}
-
-void exynos_drm_encoder_crtc_commit(struct drm_encoder *encoder, void *data)
-{
- int zpos = DEFAULT_ZPOS;
-
- DRM_DEBUG_KMS("%s\n", __FILE__);
-
- exynos_drm_encoder_crtc_plane_commit(encoder, &zpos);
-}
-
void exynos_drm_encoder_dpms_from_crtc(struct drm_encoder *encoder, void *data)
{
struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
@@ -393,44 +369,62 @@ void exynos_drm_encoder_crtc_dpms(struct drm_encoder *encoder, void *data)
}
}
-void exynos_drm_encoder_crtc_mode_set(struct drm_encoder *encoder, void *data)
+void exynos_drm_encoder_crtc_pipe(struct drm_encoder *encoder, void *data)
+{
+ struct exynos_drm_manager *manager =
+ to_exynos_encoder(encoder)->manager;
+ int pipe = *(int *)data;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ /*
+ * when crtc is detached from encoder, this pipe is used
+ * to select manager operation
+ */
+ manager->pipe = pipe;
+}
+
+void exynos_drm_encoder_plane_mode_set(struct drm_encoder *encoder, void *data)
{
struct exynos_drm_manager *manager =
to_exynos_encoder(encoder)->manager;
struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
struct exynos_drm_overlay *overlay = data;
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
if (overlay_ops && overlay_ops->mode_set)
overlay_ops->mode_set(manager->dev, overlay);
}
-void exynos_drm_encoder_crtc_disable(struct drm_encoder *encoder, void *data)
+void exynos_drm_encoder_plane_commit(struct drm_encoder *encoder, void *data)
{
struct exynos_drm_manager *manager =
to_exynos_encoder(encoder)->manager;
struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
int zpos = DEFAULT_ZPOS;
- DRM_DEBUG_KMS("\n");
+ DRM_DEBUG_KMS("%s\n", __FILE__);
if (data)
zpos = *(int *)data;
- if (overlay_ops && overlay_ops->disable)
- overlay_ops->disable(manager->dev, zpos);
+ if (overlay_ops && overlay_ops->commit)
+ overlay_ops->commit(manager->dev, zpos);
}
-void exynos_drm_encoder_crtc_pipe(struct drm_encoder *encoder, void *data)
+void exynos_drm_encoder_plane_disable(struct drm_encoder *encoder, void *data)
{
struct exynos_drm_manager *manager =
to_exynos_encoder(encoder)->manager;
- int pipe = *(int *)data;
+ struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
+ int zpos = DEFAULT_ZPOS;
DRM_DEBUG_KMS("%s\n", __FILE__);
- /*
- * when crtc is detached from encoder, this pipe is used
- * to select manager operation
- */
- manager->pipe = pipe;
+ if (data)
+ zpos = *(int *)data;
+
+ if (overlay_ops && overlay_ops->disable)
+ overlay_ops->disable(manager->dev, zpos);
}
diff --git a/drivers/gpu/drm/exynos/exynos_drm_encoder.h b/drivers/gpu/drm/exynos/exynos_drm_encoder.h
index 14dab25..cabe3eb 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_encoder.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_encoder.h
@@ -40,14 +40,12 @@ void exynos_drm_fn_encoder(struct drm_crtc *crtc, void *data,
void (*fn)(struct drm_encoder *, void *));
void exynos_drm_enable_vblank(struct drm_encoder *encoder, void *data);
void exynos_drm_disable_vblank(struct drm_encoder *encoder, void *data);
-void exynos_drm_encoder_crtc_plane_commit(struct drm_encoder *encoder,
- void *data);
-void exynos_drm_encoder_crtc_commit(struct drm_encoder *encoder, void *data);
void exynos_drm_encoder_dpms_from_crtc(struct drm_encoder *encoder,
void *data);
void exynos_drm_encoder_crtc_dpms(struct drm_encoder *encoder, void *data);
-void exynos_drm_encoder_crtc_mode_set(struct drm_encoder *encoder, void *data);
-void exynos_drm_encoder_crtc_disable(struct drm_encoder *encoder, void *data);
void exynos_drm_encoder_crtc_pipe(struct drm_encoder *encoder, void *data);
+void exynos_drm_encoder_plane_mode_set(struct drm_encoder *encoder, void *data);
+void exynos_drm_encoder_plane_commit(struct drm_encoder *encoder, void *data);
+void exynos_drm_encoder_plane_disable(struct drm_encoder *encoder, void *data);
#endif
diff --git a/drivers/gpu/drm/exynos/exynos_drm_plane.c b/drivers/gpu/drm/exynos/exynos_drm_plane.c
index 9ef5b8c..232e323 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_plane.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_plane.c
@@ -13,8 +13,9 @@
#include "exynos_drm.h"
#include "exynos_drm_drv.h"
-#include "exynos_drm_crtc.h"
#include "exynos_drm_encoder.h"
+#include "exynos_drm_fb.h"
+#include "exynos_drm_gem.h"
#define to_exynos_plane(x) container_of(x, struct exynos_plane, base)
@@ -32,6 +33,84 @@ static const uint32_t formats[] = {
DRM_FORMAT_NV12MT,
};
+int exynos_plane_mode_set(struct drm_plane *plane, struct drm_crtc *crtc,
+ struct drm_framebuffer *fb, int crtc_x, int crtc_y,
+ unsigned int crtc_w, unsigned int crtc_h,
+ uint32_t src_x, uint32_t src_y,
+ uint32_t src_w, uint32_t src_h)
+{
+ struct exynos_plane *exynos_plane = to_exynos_plane(plane);
+ struct exynos_drm_overlay *overlay = &exynos_plane->overlay;
+ unsigned int actual_w;
+ unsigned int actual_h;
+ int nr;
+ int i;
+
+ DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
+
+ nr = exynos_drm_format_num_buffers(fb->pixel_format);
+ for (i = 0; i < nr; i++) {
+ struct exynos_drm_gem_buf *buffer = exynos_drm_fb_buffer(fb, i);
+
+ if (!buffer) {
+ DRM_LOG_KMS("buffer is null\n");
+ return -EFAULT;
+ }
+
+ overlay->dma_addr[i] = buffer->dma_addr;
+ overlay->vaddr[i] = buffer->kvaddr;
+
+ DRM_DEBUG_KMS("buffer: %d, vaddr = 0x%lx, dma_addr = 0x%lx\n",
+ i, (unsigned long)overlay->vaddr[i],
+ (unsigned long)overlay->dma_addr[i]);
+ }
+
+ actual_w = min((unsigned)(crtc->mode.hdisplay - crtc_x), crtc_w);
+ actual_h = min((unsigned)(crtc->mode.vdisplay - crtc_y), crtc_h);
+
+ /* set drm framebuffer data. */
+ overlay->fb_x = src_x;
+ overlay->fb_y = src_y;
+ overlay->fb_width = fb->width;
+ overlay->fb_height = fb->height;
+ overlay->src_width = src_w;
+ overlay->src_height = src_h;
+ overlay->bpp = fb->bits_per_pixel;
+ overlay->pitch = fb->pitches[0];
+ overlay->pixel_format = fb->pixel_format;
+
+ /* set overlay range to be displayed. */
+ overlay->crtc_x = crtc_x;
+ overlay->crtc_y = crtc_y;
+ overlay->crtc_width = actual_w;
+ overlay->crtc_height = actual_h;
+
+ /* set drm mode data. */
+ overlay->mode_width = crtc->mode.hdisplay;
+ overlay->mode_height = crtc->mode.vdisplay;
+ overlay->refresh = crtc->mode.vrefresh;
+ overlay->scan_flag = crtc->mode.flags;
+
+ DRM_DEBUG_KMS("overlay : offset_x/y(%d,%d), width/height(%d,%d)",
+ overlay->crtc_x, overlay->crtc_y,
+ overlay->crtc_width, overlay->crtc_height);
+
+ exynos_drm_fn_encoder(crtc, overlay, exynos_drm_encoder_plane_mode_set);
+
+ return 0;
+}
+
+void exynos_plane_commit(struct drm_plane *plane)
+{
+ struct exynos_plane *exynos_plane = to_exynos_plane(plane);
+ struct exynos_drm_overlay *overlay = &exynos_plane->overlay;
+
+ exynos_drm_fn_encoder(plane->crtc, &overlay->zpos,
+ exynos_drm_encoder_plane_commit);
+
+ exynos_plane->enabled = true;
+}
+
static int
exynos_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
struct drm_framebuffer *fb, int crtc_x, int crtc_y,
@@ -39,35 +118,20 @@ exynos_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
uint32_t src_x, uint32_t src_y,
uint32_t src_w, uint32_t src_h)
{
- struct exynos_plane *exynos_plane = to_exynos_plane(plane);
- struct exynos_drm_overlay *overlay = &exynos_plane->overlay;
- struct exynos_drm_crtc_pos pos;
int ret;
DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
- memset(&pos, 0, sizeof(struct exynos_drm_crtc_pos));
- pos.crtc_x = crtc_x;
- pos.crtc_y = crtc_y;
- pos.crtc_w = crtc_w;
- pos.crtc_h = crtc_h;
-
- /* considering 16.16 fixed point of source values */
- pos.fb_x = src_x >> 16;
- pos.fb_y = src_y >> 16;
- pos.src_w = src_w >> 16;
- pos.src_h = src_h >> 16;
-
- ret = exynos_drm_overlay_update(overlay, fb, &crtc->mode, &pos);
+ ret = exynos_plane_mode_set(plane, crtc, fb, crtc_x, crtc_y,
+ crtc_w, crtc_h, src_x >> 16, src_y >> 16,
+ src_w >> 16, src_h >> 16);
if (ret < 0)
return ret;
- exynos_drm_fn_encoder(crtc, overlay,
- exynos_drm_encoder_crtc_mode_set);
- exynos_drm_fn_encoder(crtc, &overlay->zpos,
- exynos_drm_encoder_crtc_plane_commit);
+ plane->crtc = crtc;
+ plane->fb = crtc->fb;
- exynos_plane->enabled = true;
+ exynos_plane_commit(plane);
return 0;
}
@@ -83,7 +147,7 @@ static int exynos_disable_plane(struct drm_plane *plane)
return 0;
exynos_drm_fn_encoder(plane->crtc, &overlay->zpos,
- exynos_drm_encoder_crtc_disable);
+ exynos_drm_encoder_plane_disable);
exynos_plane->enabled = false;
exynos_plane->overlay.zpos = DEFAULT_ZPOS;
@@ -175,10 +239,3 @@ out:
mutex_unlock(&dev->mode_config.mutex);
return ret;
}
-
-struct exynos_drm_overlay *get_exynos_drm_overlay(struct drm_plane *plane)
-{
- struct exynos_plane *exynos_plane = to_exynos_plane(plane);
-
- return &exynos_plane->overlay;
-}
diff --git a/drivers/gpu/drm/exynos/exynos_drm_plane.h b/drivers/gpu/drm/exynos/exynos_drm_plane.h
index d0529181..47fd555 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_plane.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_plane.h
@@ -9,8 +9,13 @@
*
*/
+int exynos_plane_mode_set(struct drm_plane *plane, struct drm_crtc *crtc,
+ struct drm_framebuffer *fb, int crtc_x, int crtc_y,
+ unsigned int crtc_w, unsigned int crtc_h,
+ uint32_t src_x, uint32_t src_y,
+ uint32_t src_w, uint32_t src_h);
+void exynos_plane_commit(struct drm_plane *plane);
struct drm_plane *exynos_plane_init(struct drm_device *dev,
unsigned int possible_crtcs, bool priv);
int exynos_plane_set_zpos_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
-struct exynos_drm_overlay *get_exynos_drm_overlay(struct drm_plane *plane);