diff options
| author | Mikita Lipski <mikita.lipski@amd.com> | 2018-07-13 09:07:35 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2018-08-06 15:57:29 -0500 |
| commit | 81aca8e75c1b046865fb2badef95a0dcff6f73de (patch) | |
| tree | e3d8aa50dabf89fb2906a1953ecabd97b5084438 /drivers/gpu/drm | |
| parent | 99326ee3624b90d176a8f7e2aa3d15dfaa59c8f1 (diff) | |
drm/amd/display: update clk for various HDMI color depths
[why]
When programming tonga's connector's backend we didn't take
in account that HDMI's colour depth might be more than 8bpc
therefore we need to add a switch statement that would adjust
the pixel clock accordingly.
[how]
Add a switch statement updating clock by its appropriate
coefficient.
Signed-off-by: Mikita Lipski <mikita.lipski@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/bios/command_table.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/bios/command_table.c b/drivers/gpu/drm/amd/display/dc/bios/command_table.c index 651e1fd4622f..a558bfaa0c46 100644 --- a/drivers/gpu/drm/amd/display/dc/bios/command_table.c +++ b/drivers/gpu/drm/amd/display/dc/bios/command_table.c @@ -808,6 +808,24 @@ static enum bp_result transmitter_control_v1_5( * (=1: 8bpp, =1.25: 10bpp, =1.5:12bpp, =2: 16bpp) * LVDS mode: usPixelClock = pixel clock */ + if (cntl->signal == SIGNAL_TYPE_HDMI_TYPE_A) { + switch (cntl->color_depth) { + case COLOR_DEPTH_101010: + params.usSymClock = + cpu_to_le16((le16_to_cpu(params.usSymClock) * 30) / 24); + break; + case COLOR_DEPTH_121212: + params.usSymClock = + cpu_to_le16((le16_to_cpu(params.usSymClock) * 36) / 24); + break; + case COLOR_DEPTH_161616: + params.usSymClock = + cpu_to_le16((le16_to_cpu(params.usSymClock) * 48) / 24); + break; + default: + break; + } + } if (EXEC_BIOS_CMD_TABLE(UNIPHYTransmitterControl, params)) result = BP_RESULT_OK; |