From: Alex Hung alex.hung@amd.com
[ Upstream commit 0b5dfe12755f87ec014bb4cc1930485026167430 ]
[Why & How]
timing.dsc_cfg.num_slices_v can be zero and it is necessary to check before using it.
This fixes the error "divide error: 0000 [#1] PREEMPT SMP NOPTI".
Reviewed-by: Aurabindo Pillai Aurabindo.Pillai@amd.com Acked-by: Qingqing Zhuo qingqing.zhuo@amd.com Signed-off-by: Alex Hung alex.hung@amd.com Tested-by: Daniel Wheeler daniel.wheeler@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Cc: stable@vger.kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/amd/display/modules/power/power_helpers.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/modules/power/power_helpers.c b/drivers/gpu/drm/amd/display/modules/power/power_helpers.c index cf4fa87c7db60..e75b443ee95dc 100644 --- a/drivers/gpu/drm/amd/display/modules/power/power_helpers.c +++ b/drivers/gpu/drm/amd/display/modules/power/power_helpers.c @@ -933,6 +933,10 @@ bool psr_su_set_y_granularity(struct dc *dc, struct dc_link *link,
pic_height = stream->timing.v_addressable + stream->timing.v_border_top + stream->timing.v_border_bottom; + + if (stream->timing.dsc_cfg.num_slices_v == 0) + return false; + slice_height = pic_height / stream->timing.dsc_cfg.num_slices_v;
if (slice_height) {