[PATCH] drm/ast: Fix start address computation

[Jocelyn Falempe]

During the driver conversion to shmem, there is a missing page shift when
computing the start address in GPU memory.
This leads to graphic garbage when connecting to the remote BMC, depending
on the PCI start address.

Tested on a sr645 affected by this bug.

Fixes: f2fa5a99ca81 ("drm/ast: Convert ast to SHMEM")
Signed-off-by: Jocelyn Falempe <jfalempe at redhat.com>
---
 drivers/gpu/drm/ast/ast_mode.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index c7443317c747..d75e4a7611b3 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -714,7 +714,7 @@ static int ast_primary_plane_init(struct ast_private *ast)
 	struct ast_plane *ast_primary_plane = &ast->primary_plane;
 	struct drm_plane *primary_plane = &ast_primary_plane->base;
 	void __iomem *vaddr = ast->vram;
-	u64 offset = ast->vram_base;
+	u64 offset = ast->vram_base << PAGE_SHIFT;
 	unsigned long cursor_size = roundup(AST_HWC_SIZE + AST_HWC_SIGNATURE_SIZE, PAGE_SIZE);
 	unsigned long size = ast->vram_fb_available - cursor_size;
 	int ret;
-- 
2.39.1