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drm/radeon: disable runtime pm in certain cases 

If the platform does not support hybrid graphics or ATPX dGPU
power control.

bug: https://bugzilla.kernel.org/show_bug.cgi?id=51381

Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Alex Deucher 2016-10-31 10:41:49 -04:00
parent 3b496626ee
commit 066f1f0b47
1 changed files with 13 additions and 0 deletions
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13
drivers/gpu/drm/radeon/radeon_device.c
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@ -104,6 +104,14 @@ static const char radeon_family_name[][16] = {
"LAST", "LAST",
}; };
#if defined(CONFIG_VGA_SWITCHEROO)
bool radeon_has_atpx_dgpu_power_cntl(void);
bool radeon_is_atpx_hybrid(void);
#else
static inline bool radeon_has_atpx_dgpu_power_cntl(void) { return false; }
static inline bool radeon_is_atpx_hybrid(void) { return false; }
#endif
#define RADEON_PX_QUIRK_DISABLE_PX (1 << 0) #define RADEON_PX_QUIRK_DISABLE_PX (1 << 0)
#define RADEON_PX_QUIRK_LONG_WAKEUP (1 << 1) #define RADEON_PX_QUIRK_LONG_WAKEUP (1 << 1)
@ -160,6 +168,11 @@ static void radeon_device_handle_px_quirks(struct radeon_device *rdev)
if (rdev->px_quirk_flags & RADEON_PX_QUIRK_DISABLE_PX) if (rdev->px_quirk_flags & RADEON_PX_QUIRK_DISABLE_PX)
rdev->flags &= ~RADEON_IS_PX; rdev->flags &= ~RADEON_IS_PX;
/* disable PX is the system doesn't support dGPU power control or hybrid gfx */
if (!radeon_is_atpx_hybrid() &&
!radeon_has_atpx_dgpu_power_cntl())
rdev->flags &= ~RADEON_IS_PX;
} }
/** /**