lkml.org 
[lkml]   [2019]   [Mar]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 24/25] drm/mediatek: respect page offset for PRIME mmap calls
Date
From: Yongqiang Niu <yongqiang.niu@mediatek.com>

Respect page offset for PRIME mmap calls

Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
---
drivers/gpu/drm/mediatek/mtk_drm_gem.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_gem.c b/drivers/gpu/drm/mediatek/mtk_drm_gem.c
index c230237..524e494 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_gem.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_gem.c
@@ -144,7 +144,6 @@ static int mtk_drm_gem_object_mmap(struct drm_gem_object *obj,
* VM_PFNMAP flag that was set by drm_gem_mmap_obj()/drm_gem_mmap().
*/
vma->vm_flags &= ~VM_PFNMAP;
- vma->vm_pgoff = 0;

ret = dma_mmap_attrs(priv->dma_dev, vma, mtk_gem->cookie,
mtk_gem->dma_addr, obj->size, mtk_gem->dma_attrs);
@@ -183,6 +182,12 @@ int mtk_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)

obj = vma->vm_private_data;

+ /*
+ * Set vm_pgoff (used as a fake buffer offset by DRM) to 0 and map the
+ * whole buffer from the start.
+ */
+ vma->vm_pgoff = 0;
+
return mtk_drm_gem_object_mmap(obj, vma);
}

--
1.8.1.1.dirty
\
 
 \ /
  Last update: 2019-03-27 07:40    [W:0.143 / U:7.848 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site