From: Charlene Liu Date: Mon, 24 Jul 2017 21:41:28 -0400 Subject: drm/amd/display: single PSR display not allow CSTATE sw w/a Git-commit: ee356d8f4fff35510b83aa71299ddc0ccb798d58 Patch-mainline: v4.15-rc1 References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166 Description: HW issue when all the pipes are off, DCE_allow_cstate is 0. New sequence : blank OTG only instead of previous OTG_master_en=0) Signed-off-by: Charlene Liu Reviewed-by: Anthony Koo Acked-by: Harry Wentland Signed-off-by: Alex Deucher Acked-by: Petr Tesarik --- drivers/gpu/drm/amd/display/dc/core/dc_link.c | 6 ++++++ drivers/gpu/drm/amd/display/dc/dc_types.h | 3 ++- 2 files changed, 8 insertions(+), 1 deletion(-) --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -1548,6 +1548,12 @@ bool dc_link_setup_psr(struct dc_link *l psr_context->psr_level.u32all = 0; +#if defined(CONFIG_DRM_AMD_DC_DCN1_0) + /*skip power down the single pipe since it blocks the cstate*/ + if (ASIC_REV_IS_RAVEN(link->ctx->asic_id.hw_internal_rev)) + psr_context->psr_level.bits.SKIP_SINGLE_OTG_DISABLE = true; +#endif + /* SMU will perform additional powerdown sequence. * For unsupported ASICs, set psr_level flag to skip PSR * static screen notification to SMU. --- a/drivers/gpu/drm/amd/display/dc/dc_types.h +++ b/drivers/gpu/drm/amd/display/dc/dc_types.h @@ -539,7 +539,8 @@ union dmcu_psr_level { unsigned int SKIP_SMU_NOTIFICATION:1; unsigned int SKIP_AUTO_STATE_ADVANCE:1; unsigned int DISABLE_PSR_ENTRY_ABORT:1; - unsigned int RESERVED:23; + unsigned int SKIP_SINGLE_OTG_DISABLE:1; + unsigned int RESERVED:22; } bits; unsigned int u32all; };