diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2016-03-02 11:47:29 -0500 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2016-04-18 08:49:26 -0400 |
| commit | 0c4ed2f42fdd3c471f9aba2f051a22ca362c23bd (patch) | |
| tree | dd5a0c3634b514a34148cecfafd04b5fdc07c05c | |
| parent | 64556df8779eac2000c7c2d8c5686da07173d584 (diff) | |
| download | lwn-0c4ed2f42fdd3c471f9aba2f051a22ca362c23bd.tar.gz lwn-0c4ed2f42fdd3c471f9aba2f051a22ca362c23bd.zip | |
drm/radeon: disable runtime pm on PX laptops without dGPU power control
[ Upstream commit e64c952efb8e0c15ae82cec8e455ab4910690ef1 ]
Some PX laptops don't provide an ACPI method to control dGPU power. On
those systems, the driver is responsible for handling the dGPU power
state. Disable runtime PM on them until support for this is implemented.
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_atpx_handler.c | 8 | ||||
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_device.c | 8 |
2 files changed, 11 insertions, 5 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_atpx_handler.c b/drivers/gpu/drm/radeon/radeon_atpx_handler.c index 8bc7d0bbd3c8..1523cf94bcdc 100644 --- a/drivers/gpu/drm/radeon/radeon_atpx_handler.c +++ b/drivers/gpu/drm/radeon/radeon_atpx_handler.c @@ -62,6 +62,10 @@ bool radeon_has_atpx(void) { return radeon_atpx_priv.atpx_detected; } +bool radeon_has_atpx_dgpu_power_cntl(void) { + return radeon_atpx_priv.atpx.functions.power_cntl; +} + /** * radeon_atpx_call - call an ATPX method * @@ -141,10 +145,6 @@ static void radeon_atpx_parse_functions(struct radeon_atpx_functions *f, u32 mas */ static int radeon_atpx_validate(struct radeon_atpx *atpx) { - /* make sure required functions are enabled */ - /* dGPU power control is required */ - atpx->functions.power_cntl = true; - if (atpx->functions.px_params) { union acpi_object *info; struct atpx_px_params output; diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c index 5d54ab0fbe2b..eb5f88aa76ab 100644 --- a/drivers/gpu/drm/radeon/radeon_device.c +++ b/drivers/gpu/drm/radeon/radeon_device.c @@ -103,6 +103,12 @@ static const char radeon_family_name[][16] = { "LAST", }; +#if defined(CONFIG_VGA_SWITCHEROO) +bool radeon_has_atpx_dgpu_power_cntl(void); +#else +static inline bool radeon_has_atpx_dgpu_power_cntl(void) { return false; } +#endif + #define RADEON_PX_QUIRK_DISABLE_PX (1 << 0) #define RADEON_PX_QUIRK_LONG_WAKEUP (1 << 1) @@ -1395,7 +1401,7 @@ int radeon_device_init(struct radeon_device *rdev, * ignore it */ vga_client_register(rdev->pdev, rdev, NULL, radeon_vga_set_decode); - if (rdev->flags & RADEON_IS_PX) + if ((rdev->flags & RADEON_IS_PX) && radeon_has_atpx_dgpu_power_cntl()) runtime = true; vga_switcheroo_register_client(rdev->pdev, &radeon_switcheroo_ops, runtime); if (runtime) |