From: Sung Lee <sung....@amd.com>
commit 73076790e25717b7d452c2eab0bfb118826e5b61 upstream.
[Why]
With certain fclock overclocks, state 1 may be chosen
as the closest clock level. This may result in this state
being empty if not populated beforehand, resulting in
black screens and screen corruption.
[How]
Copy over all soc states to clock_limits before bounding
box creation to avoid any cases with empty states.
Fixes: f2459c52c84449 ("drm/amd/display: Add Bounding Box State for Low DF
PState but High Voltage State")
Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1514
Signed-off-by: Sung Lee <sung....@amd.com>
Reviewed-by: Tony Cheng <tony.ch...@amd.com>
Reviewed-by: Yongqiang Sun <yongqiang....@amd.com>
Acked-by: Qingqing Zhuo <qingqing.z...@amd.com>
Tested-by: Daniel Wheeler <daniel.whee...@amd.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Cc: sta...@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
@@ -1595,6 +1595,11 @@ static void update_bw_bounding_box(struc
dcn2_1_soc.num_chans = bw_params->num_channels;
ASSERT(clk_table->num_entries);
+ /* Copy dcn2_1_soc.clock_limits to clock_limits to avoid copying over
null states later */
+ for (i = 0; i < dcn2_1_soc.num_states + 1; i++) {
+ clock_limits[i] = dcn2_1_soc.clock_limits[i];
+ }
+
for (i = 0; i < clk_table->num_entries; i++) {
/* loop backwards*/
for (closest_clk_lvl = 0, j = dcn2_1_soc.num_states - 1; j >=
0; j--) {
