diff options
| author | Timur Kristóf <timur.kristof@gmail.com> | 2025-09-26 20:01:46 +0200 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-10-28 10:08:36 -0400 |
| commit | 727b179a8032c256b02b816661b2d96713f11e41 (patch) | |
| tree | 5ad6fa9db402531f29ea22f1c48da6b5d258abec | |
| parent | 7fb4f254c8ebcd89e32c13c2a5758b0664f9fcc4 (diff) | |
drm/amd/display: Get maximum pixel clock from VBIOS
We will use this for validating the pixel clock when
an analog monitor is connected to VGA or DVI-I connectors.
For reference, see the legacy display code:
amdgpu_connector_vga_mode_valid
Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/bios/bios_parser.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/include/grph_object_ctrl_defs.h | 1 |
2 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/bios/bios_parser.c b/drivers/gpu/drm/amd/display/dc/bios/bios_parser.c index c7875edea321..33d0ec38ded7 100644 --- a/drivers/gpu/drm/amd/display/dc/bios/bios_parser.c +++ b/drivers/gpu/drm/amd/display/dc/bios/bios_parser.c @@ -441,6 +441,7 @@ static enum bp_result get_firmware_info_v1_4( le32_to_cpu(firmware_info->ulMinPixelClockPLL_Output) * 10; info->pll_info.max_output_pxl_clk_pll_frequency = le32_to_cpu(firmware_info->ulMaxPixelClockPLL_Output) * 10; + info->max_pixel_clock = le16_to_cpu(firmware_info->usMaxPixelClock) * 10; if (firmware_info->usFirmwareCapability.sbfAccess.MemoryClockSS_Support) /* Since there is no information on the SS, report conservative @@ -497,6 +498,7 @@ static enum bp_result get_firmware_info_v2_1( info->external_clock_source_frequency_for_dp = le16_to_cpu(firmwareInfo->usUniphyDPModeExtClkFreq) * 10; info->min_allowed_bl_level = firmwareInfo->ucMinAllowedBL_Level; + info->max_pixel_clock = le16_to_cpu(firmwareInfo->usMaxPixelClock) * 10; /* There should be only one entry in the SS info table for Memory Clock */ diff --git a/drivers/gpu/drm/amd/display/include/grph_object_ctrl_defs.h b/drivers/gpu/drm/amd/display/include/grph_object_ctrl_defs.h index cc467031651d..38a77fa9b4af 100644 --- a/drivers/gpu/drm/amd/display/include/grph_object_ctrl_defs.h +++ b/drivers/gpu/drm/amd/display/include/grph_object_ctrl_defs.h @@ -169,6 +169,7 @@ struct dc_firmware_info { uint32_t engine_clk_ss_percentage; } feature; + uint32_t max_pixel_clock; /* in KHz */ uint32_t default_display_engine_pll_frequency; /* in KHz */ uint32_t external_clock_source_frequency_for_dp; /* in KHz */ uint32_t smu_gpu_pll_output_freq; /* in KHz */ |