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Commit e9a4099a authored by Alex Deucher's avatar Alex Deucher Committed by Christian König
Browse files

drm/radeon: fix ATPX detection on non-VGA GPUs 



Some newer PX laptops have the pci device class
set to DISPLAY_OTHER rather than DISPLAY_VGA.  This
properly detects ATPX on those laptops.

Based on a patch from: Pali Rohár <pali.rohar@gmail.com>

Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Cc: airlied@gmail.com
parent 3ed9a335

drivers/gpu/drm/radeon/radeon_atpx_handler.c

+7 −0
Original line number Diff line number Diff line
@@ -528,6 +528,13 @@ static bool radeon_atpx_detect(void) 
		has_atpx |= (radeon_atpx_pci_probe_handle(pdev) == true);

	}



	/* some newer PX laptops mark the dGPU as a non-VGA display device */

	while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {

		vga_count++;



		has_atpx |= (radeon_atpx_pci_probe_handle(pdev) == true);

	}



	if (has_atpx && vga_count == 2) {

		acpi_get_name(radeon_atpx_priv.atpx.handle, ACPI_FULL_PATHNAME, &buffer);

		printk(KERN_INFO "VGA switcheroo: detected switching method %s handle\n",