diff options
| author | Alex Hung <alex.hung@amd.com> | 2023-04-03 17:45:41 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-05-11 23:03:03 +0900 |
| commit | e43cf7abece2efaebe0a757909d258212d01c404 (patch) | |
| tree | 0dbc86543f032c9ffe0b8c28163205611a822fae /drivers/gpu/drm/amd/display/modules/power/power_helpers.c | |
| parent | 09c41688b6e5c038df5baacdb0f4e23c8a10ebdb (diff) | |
drm/amd/display: fix a divided-by-zero error
[ 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>
Diffstat (limited to 'drivers/gpu/drm/amd/display/modules/power/power_helpers.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/modules/power/power_helpers.c | 4 |
1 files changed, 4 insertions, 0 deletions
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 01fc6a368d2e3..9edd39322c822 100644 --- a/drivers/gpu/drm/amd/display/modules/power/power_helpers.c +++ b/drivers/gpu/drm/amd/display/modules/power/power_helpers.c @@ -924,6 +924,10 @@ 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) { |