[Intel-gfx] [PATCH i-g-t] lib: kms: move framebuffer scanout offset/size to plane

[Lionel Landwerlin]

This fixes potential crashes when the framebuffer is unset from a
given plane.

v2: s/with/within/ typo in header

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Cc: Marius Vlad <marius.c.vlad at intel.com>
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 lib/igt_fb.h  |  4 ----
 lib/igt_kms.c | 32 ++++++++++++++++----------------
 lib/igt_kms.h |  8 ++++++++
 3 files changed, 24 insertions(+), 20 deletions(-)

diff --git a/lib/igt_fb.h b/lib/igt_fb.h
index e8fe3ac..0a06899 100644
--- a/lib/igt_fb.h
+++ b/lib/igt_fb.h
@@ -55,10 +55,6 @@ struct igt_fb {
 	unsigned size;
 	cairo_surface_t *cairo_surface;
 	unsigned domain;
-	uint32_t src_x;
-	uint32_t src_y;
-	uint32_t src_w;
-	uint32_t src_h;
 };
 
 enum igt_text_align {
diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index 82257a6..b63a59d 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -1586,10 +1586,10 @@ igt_atomic_prepare_plane_commit(igt_plane_t *plane, igt_output_t *output,
 	}
 
 	if (plane->position_changed || plane->size_changed) {
-		uint32_t src_x = IGT_FIXED(plane->fb->src_x, 0); /* src_x */
-		uint32_t src_y = IGT_FIXED(plane->fb->src_y, 0); /* src_y */
-		uint32_t src_w = IGT_FIXED(plane->fb->src_w, 0); /* src_w */
-		uint32_t src_h = IGT_FIXED(plane->fb->src_h, 0); /* src_h */
+		uint32_t src_x = IGT_FIXED(plane->src_x, 0); /* src_x */
+		uint32_t src_y = IGT_FIXED(plane->src_y, 0); /* src_y */
+		uint32_t src_w = IGT_FIXED(plane->src_w, 0); /* src_w */
+		uint32_t src_h = IGT_FIXED(plane->src_h, 0); /* src_h */
 		int32_t crtc_x = plane->crtc_x;
 		int32_t crtc_y = plane->crtc_y;
 		uint32_t crtc_w = plane->crtc_w;
@@ -1677,10 +1677,10 @@ static int igt_drm_plane_commit(igt_plane_t *plane,
 		CHECK_RETURN(ret, fail_on_error);
 	} else if (plane->fb_changed || plane->position_changed ||
 		plane->size_changed) {
-		src_x = IGT_FIXED(plane->fb->src_x,0); /* src_x */
-		src_y = IGT_FIXED(plane->fb->src_y,0); /* src_y */
-		src_w = IGT_FIXED(plane->fb->src_w,0); /* src_w */
-		src_h = IGT_FIXED(plane->fb->src_h,0); /* src_h */
+		src_x = IGT_FIXED(plane->src_x,0); /* src_x */
+		src_y = IGT_FIXED(plane->src_y,0); /* src_y */
+		src_w = IGT_FIXED(plane->src_w,0); /* src_w */
+		src_h = IGT_FIXED(plane->src_h,0); /* src_h */
 		crtc_x = plane->crtc_x;
 		crtc_y = plane->crtc_y;
 		crtc_w = plane->crtc_w;
@@ -2201,10 +2201,10 @@ void igt_plane_set_fb(igt_plane_t *plane, struct igt_fb *fb)
 		plane->crtc_h = fb->height;
 
 		/* set default src pos/size as fb size */
-		fb->src_x = 0;
-		fb->src_y = 0;
-		fb->src_w = fb->width;
-		fb->src_h = fb->height;
+		plane->src_x = 0;
+		plane->src_y = 0;
+		plane->src_w = fb->width;
+		plane->src_h = fb->height;
 	} else {
 		plane->crtc_w = 0;
 		plane->crtc_h = 0;
@@ -2271,8 +2271,8 @@ void igt_fb_set_position(struct igt_fb *fb, igt_plane_t *plane,
 	LOG(display, "%s.%d: fb_set_position(%d,%d)\n",
 	    kmstest_pipe_name(pipe->pipe), plane->index, x, y);
 
-	fb->src_x = x;
-	fb->src_y = y;
+	plane->src_x = x;
+	plane->src_y = y;
 
 	plane->fb_changed = true;
 }
@@ -2297,8 +2297,8 @@ void igt_fb_set_size(struct igt_fb *fb, igt_plane_t *plane,
 	LOG(display, "%s.%d: fb_set_size(%dx%d)\n",
 	    kmstest_pipe_name(pipe->pipe), plane->index, w, h);
 
-	fb->src_w = w;
-	fb->src_h = h;
+	plane->src_w = w;
+	plane->src_h = h;
 
 	plane->fb_changed = true;
 }
diff --git a/lib/igt_kms.h b/lib/igt_kms.h
index 8ae1192..b763120 100644
--- a/lib/igt_kms.h
+++ b/lib/igt_kms.h
@@ -243,6 +243,14 @@ typedef struct {
 	int crtc_x, crtc_y;
 	/* size within pipe_src_w x pipe_src_h */
 	int crtc_w, crtc_h;
+
+	/* position within the framebuffer */
+	uint32_t src_x;
+	uint32_t src_y;
+	/* size within the framebuffer*/
+	uint32_t src_w;
+	uint32_t src_h;
+
 	/* panning offset within the fb */
 	unsigned int pan_x, pan_y;
 	igt_rotation_t rotation;
-- 
2.8.0.rc3