From: Mikita Lipski <[email protected]> [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. Change-Id: I0d7f1fe6915f8f9c19eb3a39e56a4ae8cdd1b30a Signed-off-by: Mikita Lipski <[email protected]> Reviewed-by: Charlene Liu <[email protected]> Acked-by: Bhawanpreet Lakha <[email protected]> --- drivers/gpu/drm/amd/display/dc/bios/command_table.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) 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 2a72025838d0..2bd7cd97e00d 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; -- 2.14.1 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
