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drm/amd/display: Use int for calculating vline start 

We are not sure these calculations will never need negative numbers. Use
signed integers and warn and cap at 0 if this ever happens.

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Harry Wentland 2018-04-10 16:06:34 -04:00 committed by Alex Deucher
parent 34ff937029
commit 403dc5e8aa
1 changed files with 4 additions and 4 deletions
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8
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c
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@ -96,10 +96,10 @@ static void optc1_disable_stereo(struct timing_generator *optc)
static uint32_t get_start_vline(struct timing_generator *optc, const struct dc_crtc_timing *dc_crtc_timing)
{
struct dc_crtc_timing patched_crtc_timing;
uint32_t vesa_sync_start;
uint32_t asic_blank_end;
uint32_t interlace_factor;
uint32_t vertical_line_start;
int vesa_sync_start;
int asic_blank_end;
int interlace_factor;
int vertical_line_start;
patched_crtc_timing = *dc_crtc_timing;
optc1_apply_front_porch_workaround(optc, &patched_crtc_timing);