[PATCH drm-misc-next v3 4/4] drm: verisilicon: fill plane's vs_format in atomic_check

[Icenowy Zheng]

Move the conversion from drm_format to vs_format to atomic_check, which
is before the point of no return and can properly bail out.

Signed-off-by: Icenowy Zheng <zhengxingda@xxxxxxxxxxx>
---
Changes in v3:
- Move the code filling vs_format to after drm_atomic_helper_check_plane_state()
  call.
- Add drm_WARN_ON_ONCE when filling vs_format fails.
- Add code copying vs_format in vs_plane_duplicate_state (because it no
  longer memdup's the whole struct vs_plane_state).

Changes in v2:
- Add non-NULL check for drm_plane_state->fb.

 drivers/gpu/drm/verisilicon/vs_plane.c        |  7 +++-
 drivers/gpu/drm/verisilicon/vs_plane.h        |  2 ++
 .../gpu/drm/verisilicon/vs_primary_plane.c    | 35 +++++++++++++------
 3 files changed, 32 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/verisilicon/vs_plane.c b/drivers/gpu/drm/verisilicon/vs_plane.c
index e92b869fb90ca..902c6f66c975f 100644
--- a/drivers/gpu/drm/verisilicon/vs_plane.c
+++ b/drivers/gpu/drm/verisilicon/vs_plane.c
@@ -129,17 +129,22 @@ dma_addr_t vs_fb_get_dma_addr(struct drm_framebuffer *fb,
 
 struct drm_plane_state *vs_plane_duplicate_state(struct drm_plane *plane)
 {
-	struct vs_plane_state *vs_state;
+	struct vs_plane_state *vs_state, *vs_state_old;
 
 	if (drm_WARN_ON(plane->dev, !plane->state))
 		return NULL;
 
+	vs_state_old = to_vs_plane_state(plane->state);
+
 	vs_state = kzalloc_obj(*vs_state, GFP_KERNEL);
 	if (!vs_state)
 		return NULL;
 
 	__drm_atomic_helper_plane_duplicate_state(plane, &vs_state->base);
 
+	memcpy(&vs_state->format, &vs_state_old->format,
+	       sizeof(struct vs_format));
+
 	return &vs_state->base;
 }
 
diff --git a/drivers/gpu/drm/verisilicon/vs_plane.h b/drivers/gpu/drm/verisilicon/vs_plane.h
index 48ed8fc754d18..f18c36ef4cd90 100644
--- a/drivers/gpu/drm/verisilicon/vs_plane.h
+++ b/drivers/gpu/drm/verisilicon/vs_plane.h
@@ -65,6 +65,8 @@ struct vs_format {
 
 struct vs_plane_state {
 	struct drm_plane_state base;
+
+	struct vs_format format;
 };
 
 static inline struct vs_plane_state *to_vs_plane_state(struct drm_plane_state *state)
diff --git a/drivers/gpu/drm/verisilicon/vs_primary_plane.c b/drivers/gpu/drm/verisilicon/vs_primary_plane.c
index 421d6f9dc547b..3d45101838aeb 100644
--- a/drivers/gpu/drm/verisilicon/vs_primary_plane.c
+++ b/drivers/gpu/drm/verisilicon/vs_primary_plane.c
@@ -25,17 +25,31 @@ static int vs_primary_plane_atomic_check(struct drm_plane *plane,
 {
 	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
 										 plane);
+	struct vs_plane_state *new_vs_plane_state = to_vs_plane_state(new_plane_state);
+	struct drm_framebuffer *fb = new_plane_state->fb;
 	struct drm_crtc *crtc = new_plane_state->crtc;
 	struct drm_crtc_state *crtc_state = NULL;
+	int ret;
 
 	if (crtc)
 		crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
 
-	return drm_atomic_helper_check_plane_state(new_plane_state,
-						   crtc_state,
-						   DRM_PLANE_NO_SCALING,
-						   DRM_PLANE_NO_SCALING,
-						   false, true);
+	ret = drm_atomic_helper_check_plane_state(new_plane_state,
+						  crtc_state,
+						  DRM_PLANE_NO_SCALING,
+						  DRM_PLANE_NO_SCALING,
+						  false, true);
+	if (ret)
+		return ret;
+
+	if (fb) {
+		ret = drm_format_to_vs_format(fb->format->format,
+					      &new_vs_plane_state->format);
+		if (drm_WARN_ON_ONCE(plane->dev, ret))
+			return ret;
+	}
+
+	return 0;
 }
 
 static void vs_primary_plane_commit(struct vs_dc *dc, unsigned int output)
@@ -84,11 +98,11 @@ static void vs_primary_plane_atomic_update(struct drm_plane *plane,
 {
 	struct drm_plane_state *state = drm_atomic_get_new_plane_state(atomic_state,
 								       plane);
+	struct vs_plane_state *vs_state = to_vs_plane_state(state);
 	struct drm_framebuffer *fb = state->fb;
 	struct drm_crtc *crtc = state->crtc;
 	struct vs_dc *dc;
 	struct vs_crtc *vcrtc;
-	struct vs_format fmt;
 	unsigned int output;
 	dma_addr_t dma_addr;
 
@@ -101,16 +115,15 @@ static void vs_primary_plane_atomic_update(struct drm_plane *plane,
 	output = vcrtc->id;
 	dc = vcrtc->dc;
 
-	drm_format_to_vs_format(state->fb->format->format, &fmt);
-
 	regmap_update_bits(dc->regs, VSDC_FB_CONFIG(output),
 			   VSDC_FB_CONFIG_FMT_MASK,
-			   VSDC_FB_CONFIG_FMT(fmt.color));
+			   VSDC_FB_CONFIG_FMT(vs_state->format.color));
 	regmap_update_bits(dc->regs, VSDC_FB_CONFIG(output),
 			   VSDC_FB_CONFIG_SWIZZLE_MASK,
-			   VSDC_FB_CONFIG_SWIZZLE(fmt.swizzle));
+			   VSDC_FB_CONFIG_SWIZZLE(vs_state->format.swizzle));
 	regmap_assign_bits(dc->regs, VSDC_FB_CONFIG(output),
-			   VSDC_FB_CONFIG_UV_SWIZZLE_EN, fmt.uv_swizzle);
+			   VSDC_FB_CONFIG_UV_SWIZZLE_EN,
+			   vs_state->format.uv_swizzle);
 
 	dma_addr = vs_fb_get_dma_addr(fb, &state->src);
 
-- 
2.52.0