[PATCH v4 09/10] drm/arm/malidp:- Disregard the pitch alignment constraint for AFBC framebuffer.

[Ayan Halder]

From: Ayan Kumar Halder <ayan.halder at arm.com>

Considering the fact that some of the AFBC specific pixel formats are expressed
in bits per pixel (ie bpp which is not byte aligned), the pitch (ie width * bpp)
is not guaranteed to be aligned to burst size (ie 8 or 16 bytes).
For example, DRM_FORMAT_VUY101010 is 30 bits per pixel. For a framebuffer of
width 32 pixels, the pitch will be 120 bytes which is not aligned to burst size
(ie 16 bytes) for DP650.

Changes since v3 (series):
- Added the ack
- Rebased on the latest drm-misc-next

Signed-off-by: Ayan Kumar halder <ayan.halder at arm.com>
Acked-by: Liviu Dudau <liviu.dudau at arm.com>
Acked-by: Alyssa Rosenzweig <alyssa at rosenzweig.io>
---
 drivers/gpu/drm/arm/malidp_planes.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/arm/malidp_planes.c b/drivers/gpu/drm/arm/malidp_planes.c
index 3dc8a6f..044bf7f 100644
--- a/drivers/gpu/drm/arm/malidp_planes.c
+++ b/drivers/gpu/drm/arm/malidp_planes.c
@@ -531,8 +531,8 @@ static int malidp_de_plane_check(struct drm_plane *plane,
 	for (i = 0; i < ms->n_planes; i++) {
 		u8 alignment = malidp_hw_get_pitch_align(mp->hwdev, rotated);
 
-		if ((fb->pitches[i] * drm_format_info_block_height(fb->format, i))
-				& (alignment - 1)) {
+		if (((fb->pitches[i] * drm_format_info_block_height(fb->format, i))
+				& (alignment - 1)) && !(fb->modifier)) {
 			DRM_DEBUG_KMS("Invalid pitch %u for plane %d\n",
 				      fb->pitches[i], i);
 			return -EINVAL;
-- 
2.7.4