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authorLiviu Dudau <Liviu.Dudau@arm.com>2017-12-05 15:29:00 +0000
committerLiviu Dudau <Liviu.Dudau@arm.com>2018-03-14 11:38:02 +0000
commit5ed4fdfa58f091a65cb533cc6b8f47ade4cc4475 (patch)
treefa5ef33e97a42b3305fadf3f9b8b06049cd4013a /drivers/gpu/drm/arm
parentfcad73b9b1fb9580fd43f1349fd8ab34d5d456e9 (diff)
downloadlinux-5ed4fdfa58f091a65cb533cc6b8f47ade4cc4475.tar.bz2
drm/mali-dp: Align pitch size to be multiple of bus burst read size.
Mali DP hardware needs pitch line sizes aligned to the bus burst size for reads, so take that into consideration when allocating dumb buffers. If the layer is rotated then the stride size requirement is even larger for some hardware versions, so allocate for the worst case scenario. Update the ->dumb_create() hook to a driver specific function that sets the correct pitch size. Reported-by: Ayan Halder <ayan.halder@arm.com> Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
Diffstat (limited to 'drivers/gpu/drm/arm')
-rw-r--r--drivers/gpu/drm/arm/malidp_drv.c15
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/gpu/drm/arm/malidp_drv.c b/drivers/gpu/drm/arm/malidp_drv.c
index 3d82712d8002..d88a3b9d59cc 100644
--- a/drivers/gpu/drm/arm/malidp_drv.c
+++ b/drivers/gpu/drm/arm/malidp_drv.c
@@ -312,13 +312,26 @@ static int malidp_irq_init(struct platform_device *pdev)
DEFINE_DRM_GEM_CMA_FOPS(fops);
+static int malidp_dumb_create(struct drm_file *file_priv,
+ struct drm_device *drm,
+ struct drm_mode_create_dumb *args)
+{
+ struct malidp_drm *malidp = drm->dev_private;
+ /* allocate for the worst case scenario, i.e. rotated buffers */
+ u8 alignment = malidp_hw_get_pitch_align(malidp->dev, 1);
+
+ args->pitch = ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8), alignment);
+
+ return drm_gem_cma_dumb_create_internal(file_priv, drm, args);
+}
+
static struct drm_driver malidp_driver = {
.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC |
DRIVER_PRIME,
.lastclose = drm_fb_helper_lastclose,
.gem_free_object_unlocked = drm_gem_cma_free_object,
.gem_vm_ops = &drm_gem_cma_vm_ops,
- .dumb_create = drm_gem_cma_dumb_create,
+ .dumb_create = malidp_dumb_create,
.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
.gem_prime_export = drm_gem_prime_export,