diff options
| author |   Paul Hsieh <paul.hsieh@amd.com> | 2022-03-16 06:59:46 +0800 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2022-04-12 14:18:18 -0400 |
| commit | 593692d2de458a68c8e2326d48d1325d87947d90 (patch) | |
| tree | 2a9f0e166cec693fdbec0ddd81e2d7df3bfa4211 /drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21 | |
| parent | drm/amd/display: remove dtbclk_ss compensation for dcn316 (diff) | |
| download | linux-dev-593692d2de458a68c8e2326d48d1325d87947d90.tar.xz linux-dev-593692d2de458a68c8e2326d48d1325d87947d90.zip | |
drm/amd/display: Power down hardware if timer not trigger
[WHY]
In headless systems, if SetMode/Power down timer
is not called, hardware will not be powered down
causing HW/SW discrepancies. Powering down hardware
on SetPowerState to D3 will ensure SW/HW state is accurate.
[HOW]
1. If PowerDownThread timer is not trigger but OS call
SetPowerState to D3, power down hardware.
2. Update HDMI hang w/a to apply to all TMDS signals on
headless system
Reviewed-by: Martin Leung <Martin.Leung@amd.com>
Acked-by: Pavle Kotarac <Pavle.Kotarac@amd.com>
Signed-off-by: Paul Hsieh <paul.hsieh@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c index f4dee0e48a67..02943ca65807 100644 --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c @@ -88,11 +88,22 @@ static int rn_get_active_display_cnt_wa(struct dc *dc, struct dc_state *context) static void rn_set_low_power_state(struct clk_mgr *clk_mgr_base) { + int display_count; struct clk_mgr_internal *clk_mgr = TO_CLK_MGR_INTERNAL(clk_mgr_base); + struct dc *dc = clk_mgr_base->ctx->dc; + struct dc_state *context = dc->current_state; + + if (clk_mgr_base->clks.pwr_state != DCN_PWR_STATE_LOW_POWER) { + + display_count = rn_get_active_display_cnt_wa(dc, context); - rn_vbios_smu_set_dcn_low_power_state(clk_mgr, DCN_PWR_STATE_LOW_POWER); - /* update power state */ - clk_mgr_base->clks.pwr_state = DCN_PWR_STATE_LOW_POWER; + /* if we can go lower, go lower */ + if (display_count == 0) { + rn_vbios_smu_set_dcn_low_power_state(clk_mgr, DCN_PWR_STATE_LOW_POWER); + /* update power state */ + clk_mgr_base->clks.pwr_state = DCN_PWR_STATE_LOW_POWER; + } + } } static void rn_update_clocks_update_dpp_dto(struct clk_mgr_internal *clk_mgr, |