[PATCH 1/2] drm/amd/display: increase max surfaces in line with planes and streams

[Melissa Wen]

091a97e542cf ("drm/amd/display: Fix warning. Set MAX_SURFACES to 3")
reduced the max number of surfaces since, at that time, there was no use
for more. However, HW and driver evolves and there are now driver
versions that allow two overlay planes (max_slave_planes). Moreover,
commit 3cfd03b79425 ("drm/amd/display: update max streams per surface")
states 6 is the max surfaces supported asics can have. Therefore, update
MAX_SURFACES to match MAX_SURFACE_NUM, MAX_PLANES and MAX_STREAMS.

It also addresses array-index-out-of-bounds reported in the link.

Link: https://gitlab.freedesktop.org/drm/amd/-/issues/3594
Signed-off-by: Melissa Wen <mwen at igalia.com>
---
 drivers/gpu/drm/amd/display/dc/dc.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index 3992ad73165b..08b00b263533 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -57,7 +57,7 @@ struct dmub_notification;
 
 #define DC_VER "3.2.301"
 
-#define MAX_SURFACES 3
+#define MAX_SURFACES 6
 #define MAX_PLANES 6
 #define MAX_STREAMS 6
 #define MIN_VIEWPORT_SIZE 12
-- 
2.45.2