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From:   Satendra Singh Thakur <satendra.t@samsung.com>
To:     Gustavo Padovan <gustavo@padovan.org>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Sean Paul <seanpaul@chromium.org>,
        David Airlie <airlied@linux.ie>,
        dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Cc:     vineet.j@samsung.com, hemanshu.s@samsung.com, sst2005@gmail.com,
        Satendra Singh Thakur <satendra.t@samsung.com>
Subject: [PATCH v1] drm/kms/atomic: Using existing func for checking
 framebuffer dimensions
Date:   Fri, 27 Jul 2018 16:41:02 +0530
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Message-Id: <20180727111112epcas5p35e49be90453d18c560207d6ab34661ec~FNVGm5QCq0042200422epcas5p3X@epcas5p3.samsung.com>
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References: <0fe3bbc5-d10b-7c95-e77d-f4cd5ee6016b@linux.intel.com>
        <CGME20180727111112epcas5p35e49be90453d18c560207d6ab34661ec@epcas5p3.samsung.com>
Sender: linux-kernel-owner@vger.kernel.org
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In the func drm_atomic_plane_check, the fb geometry checking code
can be replaced by func drm_framebuffer_check_src_coords, this will
remove several redundant lines of code.

Signed-off-by: Satendra Singh Thakur <satendra.t@samsung.com>
---
 v1: Hi Mr Maarten, Thanks for the comments.
     I have splitted them into two patches.  

 drivers/gpu/drm/drm_atomic.c | 22 ++++------------------
 1 file changed, 4 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 895741e..953bd2a 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -909,7 +909,6 @@ plane_switching_crtc(struct drm_atomic_state *state,
 static int drm_atomic_plane_check(struct drm_plane *plane,
 		struct drm_plane_state *state)
 {
-	unsigned int fb_width, fb_height;
 	int ret;
 
 	/* either *both* CRTC and FB must be set, or neither */
@@ -954,24 +953,11 @@ static int drm_atomic_plane_check(struct drm_plane *plane,
 		return -ERANGE;
 	}
 
-	fb_width = state->fb->width << 16;
-	fb_height = state->fb->height << 16;
-
 	/* Make sure source coordinates are inside the fb. */
-	if (state->src_w > fb_width ||
-	    state->src_x > fb_width - state->src_w ||
-	    state->src_h > fb_height ||
-	    state->src_y > fb_height - state->src_h) {
-		DRM_DEBUG_ATOMIC("Invalid source coordinates "
-				 "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",
-				 state->src_w >> 16, ((state->src_w & 0xffff) * 15625) >> 10,
-				 state->src_h >> 16, ((state->src_h & 0xffff) * 15625) >> 10,
-				 state->src_x >> 16, ((state->src_x & 0xffff) * 15625) >> 10,
-				 state->src_y >> 16, ((state->src_y & 0xffff) * 15625) >> 10,
-				 state->fb->width, state->fb->height);
-		return -ENOSPC;
-	}
-
+	ret = drm_framebuffer_check_src_coords(state->src_x, state->src_y,
+		state->src_w, state->src_h, state->fb);
+	if (ret)
+		return ret;
 	if (plane_switching_crtc(state->state, plane, state)) {
 		DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n",
 				 plane->base.id, plane->name);
-- 
2.7.4