From efc83cf423df99bd6c1899cf0b65897f1ee75751 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Wed, 14 Sep 2016 14:01:41 -0400 Subject: [PATCH] drm/amdgpu/atpx: check for ATIF dGPU wake for display events support Some ATPX laptops implement special circuitry to generate display hotplug events via ACPI when the dGPU is powered off. Check if this is supported. Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu.h | 2 ++ drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c | 9 +++++++++ 2 files changed, 11 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index 44255cb0bb50..9d79e4ba0213 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -2450,11 +2450,13 @@ void amdgpu_register_atpx_handler(void); void amdgpu_unregister_atpx_handler(void); bool amdgpu_has_atpx_dgpu_power_cntl(void); bool amdgpu_is_atpx_hybrid(void); +bool amdgpu_atpx_dgpu_req_power_for_displays(void); #else static inline void amdgpu_register_atpx_handler(void) {} static inline void amdgpu_unregister_atpx_handler(void) {} static inline bool amdgpu_has_atpx_dgpu_power_cntl(void) { return false; } static inline bool amdgpu_is_atpx_hybrid(void) { return false; } +static inline bool amdgpu_atpx_dgpu_req_power_for_displays(void) { return false; } #endif /* diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c index 49de92600074..550c5ee704ec 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c @@ -29,6 +29,7 @@ struct amdgpu_atpx { acpi_handle handle; struct amdgpu_atpx_functions functions; bool is_hybrid; + bool dgpu_req_power_for_displays; }; static struct amdgpu_atpx_priv { @@ -73,6 +74,10 @@ bool amdgpu_is_atpx_hybrid(void) { return amdgpu_atpx_priv.atpx.is_hybrid; } +bool amdgpu_atpx_dgpu_req_power_for_displays(void) { + return amdgpu_atpx_priv.atpx.dgpu_req_power_for_displays; +} + /** * amdgpu_atpx_call - call an ATPX method * @@ -213,6 +218,10 @@ static int amdgpu_atpx_validate(struct amdgpu_atpx *atpx) atpx->is_hybrid = true; } + atpx->dgpu_req_power_for_displays = false; + if (valid_bits & ATPX_DGPU_REQ_POWER_FOR_DISPLAYS) + atpx->dgpu_req_power_for_displays = true; + return 0; } -- 2.20.1