diff options
| author | Ken Chalmers <ken.chalmers@amd.com> | 2018-11-06 14:24:12 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-01-14 15:04:39 -0500 |
| commit | 380604e27bc9c26ce64a83044aa1ea76ffd28caf (patch) | |
| tree | 8e9a9e2cee34380c330bf9e497d0c208606c1a6d /drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | |
| parent | 43995f8fb64c54b740262f72ab51d41268c0f7ff (diff) | |
drm/amd/display: Use 100 Hz precision for pipe pixel clocks
[Why]
Users would like more accurate pixel clocks, especially for fractional
"TV" frame rates like 59.94 Hz.
[How]
Store and communicate pixel clocks with 100 Hz accuracy from
dc_crtc_timing through to BIOS command table setpixelclock call.
Signed-off-by: Ken Chalmers <ken.chalmers@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index 39562c93808d..568fdc9423e6 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -1542,7 +1542,7 @@ static uint32_t bandwidth_in_kbps_from_timing( ASSERT(bits_per_channel != 0); - kbps = timing->pix_clk_khz; + kbps = timing->pix_clk_100hz / 10; kbps *= bits_per_channel; if (timing->flags.Y_ONLY != 1) { @@ -1584,7 +1584,7 @@ bool dp_validate_mode_timing( const struct dc_link_settings *link_setting; /*always DP fail safe mode*/ - if (timing->pix_clk_khz == (uint32_t) 25175 && + if ((timing->pix_clk_100hz / 10) == (uint32_t) 25175 && timing->h_addressable == (uint32_t) 640 && timing->v_addressable == (uint32_t) 480) return true; |