[PATCH v3 3/3] drm: Clarify the role of plane_state argument to drm_simple update().

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Like the atomic update hook it's wrapping, the plane_state is the old
one, and the new one is in plane->state.  Both msxfb and tinydrm use
it correctly, but I mistook it for the new state in pl111 due to its
naming.

Signed-off-by: Eric Anholt <eric@xxxxxxxxxx>
---
 drivers/gpu/drm/drm_simple_kms_helper.c | 4 ++--
 include/drm/drm_simple_kms_helper.h     | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/drm_simple_kms_helper.c b/drivers/gpu/drm/drm_simple_kms_helper.c
index 16789faa9291..e084f9f8ca66 100644
--- a/drivers/gpu/drm/drm_simple_kms_helper.c
+++ b/drivers/gpu/drm/drm_simple_kms_helper.c
@@ -114,7 +114,7 @@ static int drm_simple_kms_plane_atomic_check(struct drm_plane *plane,
 }
 
 static void drm_simple_kms_plane_atomic_update(struct drm_plane *plane,
-					struct drm_plane_state *pstate)
+					struct drm_plane_state *old_pstate)
 {
 	struct drm_simple_display_pipe *pipe;
 
@@ -122,7 +122,7 @@ static void drm_simple_kms_plane_atomic_update(struct drm_plane *plane,
 	if (!pipe->funcs || !pipe->funcs->update)
 		return;
 
-	pipe->funcs->update(pipe, pstate);
+	pipe->funcs->update(pipe, old_pstate);
 }
 
 static int drm_simple_kms_plane_prepare_fb(struct drm_plane *plane,
diff --git a/include/drm/drm_simple_kms_helper.h b/include/drm/drm_simple_kms_helper.h
index fffbb95a0915..2d36538e4a17 100644
--- a/include/drm/drm_simple_kms_helper.h
+++ b/include/drm/drm_simple_kms_helper.h
@@ -72,7 +72,7 @@ struct drm_simple_display_pipe_funcs {
 	 * the hardware lacks vblank support entirely.
 	 */
 	void (*update)(struct drm_simple_display_pipe *pipe,
-		       struct drm_plane_state *plane_state);
+		       struct drm_plane_state *old_plane_state);
 
 	/**
 	 * @prepare_fb:
-- 
2.11.0

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