[PATCH v2 5/6] drm/ast: Initialize DRAM type before posting GPU

[Thomas Zimmermann]

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 at suse.de>
Acked-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>
Fixes: bad09da6deab ("drm/ast: Fixed vram size incorrect issue on POWER")
Cc: Joel Stanley <joel at jms.id.au>
Cc: Y.C. Chen <yc_chen at aspeedtech.com>
Cc: Benjamin Herrenschmidt <benh at kernel.crashing.org>
Cc: Dave Airlie <airlied at redhat.com>
Cc: Thomas Zimmermann <tzimmermann at suse.de>
Cc: Gerd Hoffmann <kraxel at redhat.com>
Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
Cc: Sam Ravnborg <sam at ravnborg.org>
Cc: Emil Velikov <emil.l.velikov at gmail.com>
Cc: "Y.C. Chen" <yc_chen at aspeedtech.com>
Cc: <stable at vger.kernel.org> # v4.11+
---
 drivers/gpu/drm/ast/ast_main.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c
index b162cc82204d..87e5baded2a7 100644
--- a/drivers/gpu/drm/ast/ast_main.c
+++ b/drivers/gpu/drm/ast/ast_main.c
@@ -418,15 +418,15 @@ 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;
 	drm_info(dev, "dram MCLK=%u Mhz type=%d bus_width=%d\n",
 		 ast->mclk, ast->dram_type, ast->dram_bus_width);
 
+	if (need_post)
+		ast_post_gpu(dev);
+
 	ret = ast_mm_init(ast);
 	if (ret)
 		goto out_free;
-- 
2.27.0