diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_atpx_handler.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_atpx_handler.c b/drivers/gpu/drm/radeon/radeon_atpx_handler.c index 2fdcd04bc93f..4129b12521a6 100644 --- a/drivers/gpu/drm/radeon/radeon_atpx_handler.c +++ b/drivers/gpu/drm/radeon/radeon_atpx_handler.c @@ -34,6 +34,7 @@ struct radeon_atpx { static struct radeon_atpx_priv { bool atpx_detected; + bool bridge_pm_usable; /* handle for device - and atpx */ acpi_handle dhandle; struct radeon_atpx atpx; @@ -203,7 +204,11 @@ static int radeon_atpx_validate(struct radeon_atpx *atpx) atpx->is_hybrid = false; if (valid_bits & ATPX_MS_HYBRID_GFX_SUPPORTED) { printk("ATPX Hybrid Graphics\n"); - atpx->functions.power_cntl = false; + /* + * Disable legacy PM methods only when pcie port PM is usable, + * otherwise the device might fail to power off or power on. + */ + atpx->functions.power_cntl = !radeon_atpx_priv.bridge_pm_usable; atpx->is_hybrid = true; } @@ -474,6 +479,7 @@ static int radeon_atpx_power_state(enum vga_switcheroo_client_id id, */ static bool radeon_atpx_pci_probe_handle(struct pci_dev *pdev) { + struct pci_dev *parent_pdev = pci_upstream_bridge(pdev); acpi_handle dhandle, atpx_handle; acpi_status status; @@ -487,6 +493,7 @@ static bool radeon_atpx_pci_probe_handle(struct pci_dev *pdev) radeon_atpx_priv.dhandle = dhandle; radeon_atpx_priv.atpx.handle = atpx_handle; + radeon_atpx_priv.bridge_pm_usable = parent_pdev && parent_pdev->bridge_d3; return true; } |