diff options
| author | Cruise Hung <Cruise.Hung@amd.com> | 2025-07-15 16:36:44 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-07-28 16:40:31 -0400 |
| commit | 9a885f1193efa4802504624b2df3aa5eaaa44a56 (patch) | |
| tree | 1f5bc17ae3f8589f60dcd0ae8743e28ef14af89f /drivers/gpu | |
| parent | drm/amd/display: Allow for sharing of some link and audio link functions (diff) | |
| download | linux-9a885f1193efa4802504624b2df3aa5eaaa44a56.tar.gz linux-9a885f1193efa4802504624b2df3aa5eaaa44a56.zip | |
drm/amd/display: Add debug option to control BW Allocation mode
[Why & How]
Add debug option to control BW Allocation mode.
Reviewed-by: Meenakshikumar Somasundaram <meenakshikumar.somasundaram@amd.com>
Reviewed-by: PeiChen (Pei-Chen) Huang <peichen.huang@amd.com>
Signed-off-by: Cruise Hung <Cruise.Hung@amd.com>
Signed-off-by: Ivan Lipski <ivan.lipski@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dc.h | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c | 5 |
2 files changed, 7 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h index fee54cc0f7d4..57f4a9445b7e 100644 --- a/drivers/gpu/drm/amd/display/dc/dc.h +++ b/drivers/gpu/drm/amd/display/dc/dc.h @@ -839,7 +839,8 @@ union dpia_debug_options { uint32_t enable_force_tbt3_work_around:1; /* bit 4 */ uint32_t disable_usb4_pm_support:1; /* bit 5 */ uint32_t enable_usb4_bw_zero_alloc_patch:1; /* bit 6 */ - uint32_t reserved:25; + uint32_t enable_bw_allocation_mode:1; /* bit 7 */ + uint32_t reserved:24; } bits; uint32_t raw; }; diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c index 906d85ca8956..8a3c18ae97a7 100644 --- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c +++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c @@ -225,6 +225,11 @@ bool link_dpia_enable_usb4_dp_bw_alloc_mode(struct dc_link *link) bool ret = false; uint8_t val; + if (link->dc->debug.dpia_debug.bits.enable_bw_allocation_mode == false) { + DC_LOG_DEBUG("%s: link[%d] DPTX BW allocation mode disabled", __func__, link->link_index); + return false; + } + val = DPTX_BW_ALLOC_MODE_ENABLE | DPTX_BW_ALLOC_UNMASK_IRQ; if (core_link_write_dpcd(link, DPTX_BW_ALLOCATION_MODE_CONTROL, &val, sizeof(uint8_t)) == DC_OK) { |