Patch "drm/ast: Initialize DRAM type before posting GPU" has been added to the 5.8-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    drm/ast: Initialize DRAM type before posting GPU

to the 5.8-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-ast-initialize-dram-type-before-posting-gpu.patch
and it can be found in the queue-5.8 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 46133ab87497e1418e45f43072dc09fdb0f3a96a
Author: Thomas Zimmermann <tzimmermann@xxxxxxx>
Date:   Thu Jul 16 14:53:52 2020 +0200

    drm/ast: Initialize DRAM type before posting GPU
    
    [ Upstream commit 244d012801dae30c91983b360457c78d481584b0 ]
    
    Posting the GPU requires the correct DRAM type to be stored in
    struct ast_private. Therefore first initialize the DRAM info and
    then post the GPU. This restores the original order of instructions
    in this function.
    
    Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
    Reviewed-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
    Acked-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
    Fixes: bad09da6deab ("drm/ast: Fixed vram size incorrect issue on POWER")
    Cc: Joel Stanley <joel@xxxxxxxxx>
    Cc: Y.C. Chen <yc_chen@xxxxxxxxxxxxxx>
    Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
    Cc: Dave Airlie <airlied@xxxxxxxxxx>
    Cc: Thomas Zimmermann <tzimmermann@xxxxxxx>
    Cc: Gerd Hoffmann <kraxel@xxxxxxxxxx>
    Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
    Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
    Cc: Emil Velikov <emil.l.velikov@xxxxxxxxx>
    Cc: "Y.C. Chen" <yc_chen@xxxxxxxxxxxxxx>
    Cc: <stable@xxxxxxxxxxxxxxx> # v4.11+
    Link: https://patchwork.freedesktop.org/patch/msgid/20200716125353.31512-6-tzimmermann@xxxxxxx
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c
index f48a9f62368c0..99c11b51f0207 100644
--- a/drivers/gpu/drm/ast/ast_main.c
+++ b/drivers/gpu/drm/ast/ast_main.c
@@ -458,9 +458,6 @@ int ast_driver_load(struct drm_device *dev, unsigned long flags)
 
 	ast_detect_chip(dev, &need_post);
 
-	if (need_post)
-		ast_post_gpu(dev);
-
 	ret = ast_get_dram_info(dev);
 	if (ret)
 		goto out_free;
@@ -469,6 +466,9 @@ int ast_driver_load(struct drm_device *dev, unsigned long flags)
 		 ast->mclk, ast->dram_type,
 		 ast->dram_bus_width, ast->vram_size);
 
+	if (need_post)
+		ast_post_gpu(dev);
+
 	ret = ast_mm_init(ast);
 	if (ret)
 		goto out_free;