diff options
| author | Roman Li <Roman.Li@amd.com> | 2026-03-14 03:34:48 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-03-23 21:13:05 +0300 |
| commit | 5a90bb2160394fc2fb835ad8142891aea194fe3c (patch) | |
| tree | 4e8fe97bc79d77055bc195b0f53051a0fbacf707 /drivers/gpu | |
| parent | cb50faeb0d7585fed52231627d632462b9f927b0 (diff) | |
| download | linux-5a90bb2160394fc2fb835ad8142891aea194fe3c.tar.xz | |
drm/amd/display: Clamp min DS DCFCLK value to DCN limit
[why & how]
DCN has a global limit for minimum DS DCFCLK during any operation.
Adhere to that limit and add a debug flag.
Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Signed-off-by: Ovidiu Bunea <ovidiu.bunea@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Signed-off-by: Chuanyu Tseng <Chuanyu.Tseng@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/clk_mgr/dcn42/dcn42_clk_mgr.c | 5 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dc.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/resource/dcn42/dcn42_resource.c | 1 |
3 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn42/dcn42_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn42/dcn42_clk_mgr.c index a0296d5f0102..bc11510b63a1 100644 --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn42/dcn42_clk_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn42/dcn42_clk_mgr.c @@ -291,6 +291,11 @@ void dcn42_update_clocks(struct clk_mgr *clk_mgr_base, if (should_set_clock(safe_to_lower, new_clocks->dcfclk_deep_sleep_khz, clk_mgr_base->clks.dcfclk_deep_sleep_khz)) { clk_mgr_base->clks.dcfclk_deep_sleep_khz = new_clocks->dcfclk_deep_sleep_khz; + + /* Clamp the requested clock to PMFW based on DCN limit. */ + if (dc->debug.min_deep_sleep_dcfclk_khz > 0 && clk_mgr_base->clks.dcfclk_deep_sleep_khz < dc->debug.min_deep_sleep_dcfclk_khz) + clk_mgr_base->clks.dcfclk_deep_sleep_khz = dc->debug.min_deep_sleep_dcfclk_khz; + dcn42_smu_set_min_deep_sleep_dcfclk(clk_mgr, clk_mgr_base->clks.dcfclk_deep_sleep_khz); } diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h index 0b48feaba131..4d15d97ed7f1 100644 --- a/drivers/gpu/drm/amd/display/dc/dc.h +++ b/drivers/gpu/drm/amd/display/dc/dc.h @@ -1215,6 +1215,7 @@ struct dc_debug_options { bool enable_dmu_recovery; unsigned int force_vmin_threshold; bool enable_otg_frame_sync_pwa; + unsigned int min_deep_sleep_dcfclk_khz; }; diff --git a/drivers/gpu/drm/amd/display/dc/resource/dcn42/dcn42_resource.c b/drivers/gpu/drm/amd/display/dc/resource/dcn42/dcn42_resource.c index 7b451c7db02c..8175109a66b0 100644 --- a/drivers/gpu/drm/amd/display/dc/resource/dcn42/dcn42_resource.c +++ b/drivers/gpu/drm/amd/display/dc/resource/dcn42/dcn42_resource.c @@ -760,6 +760,7 @@ static const struct dc_debug_options debug_defaults_drv = { .disable_z10 = false, .ignore_pg = true, .disable_stutter_for_wm_program = true, + .min_deep_sleep_dcfclk_khz = 8000, }; static const struct dc_check_config config_defaults = { |