diff options
| author | Yongqiang Sun <yongqiang.sun@amd.com> | 2018-09-17 16:05:51 +0200 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2018-10-10 00:02:22 +0200 |
| commit | ceb9831dd6e5dfb79f94b205eade4ecc29e26d60 (patch) | |
| tree | 5d25c385351fc60f05b6702006f51f20bd3e8e64 /drivers/gpu/drm/amd/display | |
| parent | drm/amd/display: clean up encoding checks (diff) | |
| download | linux-ceb9831dd6e5dfb79f94b205eade4ecc29e26d60.tar.xz linux-ceb9831dd6e5dfb79f94b205eade4ecc29e26d60.zip | |
drm/amd/display: WA for DF keeps awake after S0i3.
[Why]
DF keeps awake after S0i3 resume due to DRAM_STATE_CNTL
is set by bios command table during dcn init_hw.
[How]
As a work around, check STATE_CNTL status before init_hw,
if it is 0 before init_hw and set to 1 after init_hw,
change it to 0.
Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c | 17 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.h | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c | 14 |
3 files changed, 35 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c index 1ea91e153d3a..69345ce688c6 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c @@ -87,6 +87,23 @@ void hubbub1_wm_read_state(struct hubbub *hubbub, s->dram_clk_chanage = REG_READ(DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_D); } +void hubbub1_disable_allow_self_refresh(struct hubbub *hubbub) +{ + REG_UPDATE(DCHUBBUB_ARB_DRAM_STATE_CNTL, + DCHUBBUB_ARB_ALLOW_SELF_REFRESH_FORCE_ENABLE, 0); +} + +bool hububu1_is_allow_self_refresh_enabled(struct hubbub *hubbub) +{ + uint32_t enable = 0; + + REG_GET(DCHUBBUB_ARB_DRAM_STATE_CNTL, + DCHUBBUB_ARB_ALLOW_SELF_REFRESH_FORCE_ENABLE, &enable); + + return true ? false : enable; +} + + bool hubbub1_verify_allow_pstate_change_high( struct hubbub *hubbub) { diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.h b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.h index d6e596eef4c5..d0f03d152913 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.h +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.h @@ -203,6 +203,10 @@ void hubbub1_program_watermarks( unsigned int refclk_mhz, bool safe_to_lower); +void hubbub1_disable_allow_self_refresh(struct hubbub *hubbub); + +bool hububu1_is_allow_self_refresh_enabled(struct hubbub *hubub); + void hubbub1_toggle_watermark_change_req( struct hubbub *hubbub); diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c index a881ff5559ec..193184affefb 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c @@ -997,7 +997,21 @@ static void dcn10_init_hw(struct dc *dc) } else { if (!dcb->funcs->is_accelerated_mode(dcb)) { + bool allow_self_fresh_force_enable = + hububu1_is_allow_self_refresh_enabled(dc->res_pool->hubbub); + bios_golden_init(dc); + + /* WA for making DF sleep when idle after resume from S0i3. + * DCHUBBUB_ARB_ALLOW_SELF_REFRESH_FORCE_ENABLE is set to 1 by + * command table, if DCHUBBUB_ARB_ALLOW_SELF_REFRESH_FORCE_ENABLE = 0 + * before calling command table and it changed to 1 after, + * it should be set back to 0. + */ + if (allow_self_fresh_force_enable == false && + hububu1_is_allow_self_refresh_enabled(dc->res_pool->hubbub)) + hubbub1_disable_allow_self_refresh(dc->res_pool->hubbub); + disable_vga(dc->hwseq); } |