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path: root/drivers/gpu/drm/amd/display/dc/bios/command_table.c
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2025-10-28drm/amd/display: Add DAC_LoadDetection to BIOS parser (v2)Timur Kristóf
DAC_LoadDetection can be used to determine whether something is connected to an analog connector by determining if there is an analog load. This causes visible flickering on displays, so we only resort to using this when the connected display doesn't have an EDID. For reference, see the legacy display code: amdgpu_atombios_encoder_dac_load_detect v2: Only clear corresponding bit from BIOS_SCRATCH_0. 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>
2025-10-28drm/amd/display: Add SelectCRTC_Source to BIOS parserTimur Kristóf
The SelectCRTC_Source command will be used to change which CRTC should be connected to which encoder. For reference, see the legacy display code: amdgpu_atombios_encoder_set_crtc_source 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>
2025-08-18drm/amd/display: Fix fractional fb divider in set_pixel_clock_v3Timur Kristóf
For later VBIOS versions, the fractional feedback divider is calculated as the remainder of dividing the feedback divider by a factor, which is set to 1000000. For reference, see: - calculate_fb_and_fractional_fb_divider - calc_pll_max_vco_construct However, in case of old VBIOS versions that have set_pixel_clock_v3, they only have 1 byte available for the fractional feedback divider, and it's expected to be set to the remainder from dividing the feedback divider by 10. For reference see the legacy display code: - amdgpu_pll_compute - amdgpu_atombios_crtc_program_pll This commit fixes set_pixel_clock_v3 by dividing the fractional feedback divider passed to the function by 100000. Fixes: 4562236b3bc0 ("drm/amd/dc: Add dc display driver (v2)") Signed-off-by: Timur Kristóf <timur.kristof@gmail.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Rodrigo Siqueira <siqueira@igalia.com> Reviewed-by: Alex Hung <alex.hung@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> (cherry picked from commit 027e7acc7e17802ebf28e1edb88a404836ad50d6) Cc: stable@vger.kernel.org
2024-04-26drm/amd/display: Fix uninitialized variables in DCAlex Hung
This fixes 29 UNINIT issues reported by Coverity. Reviewed-by: Hersen Wu <hersenxs.wu@amd.com> Acked-by: Wayne Lin <wayne.lin@amd.com> Signed-off-by: Alex Hung <alex.hung@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2024-01-15drm/amdgpu: check PS, WS indexAlexander Richards
Theoretically, it would be possible for a buggy or malicious VBIOS to overwrite past the bounds of the passed parameters (or its own workspace); add bounds checking to prevent this from happening. Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3093 Signed-off-by: Alexander Richards <electrodeyt@gmail.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2022-06-03drm/amd/display: Fix USBC link creationDillon Varone
[Description] Add USBC connector ID to align with new VBIOS parsing. Add seperate DCN321 link encoder due to different PHY version affecting DP ALT related registers. Signed-off-by: Dillon Varone <dillon.varone@amd.com> Acked-by: Jerry Zuo <jerry.zuo@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2022-03-31drm/amd/display: Add support for USBC connectorSamson Tam
[Why] Add support for CONNECTOR_ID_USBC Reviewed-by: Alvin Lee <Alvin.Lee2@amd.com> Acked-by: Alex Hung <alex.hung@amd.com> Signed-off-by: Samson Tam <Samson.Tam@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2022-03-15drm/amdgpu/dc: fix typos in commentsJulia Lawall
Various spelling mistakes in comments. Detected with the help of Coccinelle. Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2021-03-05drm/amdgpu/dc: fill in missing call to atom cmd table for pll adjust v2Alex Deucher
We set up the parameters, but never called the atom table. Reviewed-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2021-01-25drm/amd/display: Fix HDMI deep color output for DCE 6-11.Mario Kleiner
This fixes corrupted display output in HDMI deep color 10/12 bpc mode at least as observed on AMD Mullins, DCE-8.3. It will hopefully also provide fixes for other DCE's up to DCE-11, assuming those will need similar fixes, but i could not test that for HDMI due to lack of suitable hw, so viewer discretion is advised. dce110_stream_encoder_hdmi_set_stream_attribute() is used for HDMI setup on all DCE's and is missing color_depth assignment. dce110_program_pix_clk() is used for pixel clock setup on HDMI for DCE 6-11, and is missing color_depth assignment. Additionally some of the underlying Atombios specific encoder and pixelclock setup functions are missing code which is in the classic amdgpu kms modesetting path and the in the radeon kms driver for DCE6/DCE8. encoder_control_digx_v3() - Was missing setup code wrt. amdgpu and radeon kms classic drivers. Added here, but untested due to lack of suitable test hw. encoder_control_digx_v4() - Added missing setup code. Successfully tested on AMD mullins / DCE-8.3 with HDMI deep color output at 10 bpc and 12 bpc. Note that encoder_control_digx_v5() has proper setup code in place and is used, e.g., by DCE-11.2, but this code wasn't used for deep color setup due to the missing cntl.color_depth setup in the calling function for HDMI. set_pixel_clock_v5() - Missing setup code wrt. classic amdgpu/radeon kms. Added here, but untested due to lack of hw. set_pixel_clock_v6() - Missing setup code added. Successfully tested on AMD mullins DCE-8.3. This fixes corrupted display output at HDMI deep color output with 10 bpc or 12 bpc. Fixes: 4562236b3bc0 ("drm/amd/dc: Add dc display driver (v2)") Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com> Cc: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2020-08-10drm/amd/display: convert to use le16_add_cpu()Qinglang Miao
Convert cpu_to_le16(le16_to_cpu(E1) + E2) to use le16_add_cpu(). Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-01-25drm/amd/display: Connect dig_fe to otg directly instead of calling bioshersen wu
[Why] After call bios table crtc_source_select, dal will program fmt again. The bios table program dig_source_select and other fmt register for bios usage which is redundancy and uncessary. [How] Program dig_soruce_select register directly Signed-off-by: hersen wu <hersenxs.wu@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>
2019-01-14drm/amd/display: Use 100 Hz precision for pipe pixel clocksKen Chalmers
[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>
2018-08-27drm/amd/display: Set DFS bypass flags for dce110Nicholas Kazlauskas
[Why] While there is support for using and quering DFS bypass clocks the hardware is never notified to enter DFS bypass mode for dce110. [How] Add a flag that can be set when programming the display engine PLL to enable DFS bypass mode. If this flag is set then the hardware is notified to enter DFS bypass mode and the correct display engine clock frequency can be acquired. Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> Reviewed-by: Harry Wentland <Harry.Wentland@amd.com> Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2018-08-06drm/amd/display: update clk for various HDMI color depthsMikita Lipski
[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
2018-04-11drm/amd/dc: Use atombios api directly in DCRex Zhu
In order to remove the cgs wrapper functions for atombios api. Reviewed-by: Harry Wentland <Harry.Wentland@amd.com> Signed-off-by: Rex Zhu <Rex.Zhu@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2018-01-24drm/amd/display: Demote error print to debug print when ATOM impl missingHarry Wentland
I assumed wrongfully that all relevant functions should be implemented. Apparently this isn't the case. Demote the print to debug level for now. 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>
2017-12-20drm/amd/display: Error print when ATOM BIOS implementation is missingHarry Wentland
We fail apply_ctx_to_hw when crtc_source_select is missing. This isn't really helpful at this point. It would aid ASIC bringup if we log an error when we can't find the implementation for the ATOM version. Do the same for all other function points in the command table that do a NULL check before being called. Signed-off-by: Harry Wentland <harry.wentland@amd.com> Reviewed-by: Roman Li <Roman.Li@amd.com> Reviewed-by: Jordan Lazare <Jordan.Lazare@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>
2017-09-26drm/amd/display: remove dead codeTony Cheng
Signed-off-by: Tony Cheng <tony.cheng@amd.com> Reviewed-by: Harry Wentland <Harry.Wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-09-26drm/amd/display: remove un-used defines and dead codeTony Cheng
Signed-off-by: Tony Cheng <tony.cheng@amd.com> Reviewed-by: Harry Wentland <Harry.Wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-09-26drm/amd/display: Remove obsolete LATEST_ATOM_BIOS_SUPPORTHarry Wentland
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>
2017-09-26drm/amd/dc: Add dc display driver (v2)Harry Wentland
Supported DCE versions: 8.0, 10.0, 11.0, 11.2 v2: rebase against 4.11 Signed-off-by: Harry Wentland <harry.wentland@amd.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
generated by cgit v1.2.3 (git 2.46.0) at 2025-12-11 15:51:59 +0000