Commit bcc65fd8 authored Aug 08, 2011 by Matthew Garrett Committed by Dave Airlie Aug 12, 2011

drm/radeon: re-POST the asic on Apple hardware when booted via EFI

At least some Apples program the GPU into a state that wedges the engine
once userspace starts trying to perform accelerated operations. Executing
the Atom init scripts gets the hardware back into a working state. The
same hardware works fine when booted via BIOS emulation, so let's just
execute the init scripts on Apples when we're using EFI.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

parent 13bb9430

drivers/gpu/drm/radeon/radeon_device.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -32,6 +32,7 @@
		#include <drm/radeon_drm.h>
		#include <linux/vgaarb.h>
		#include <linux/vga_switcheroo.h>
		#include <linux/efi.h>
		#include "radeon_reg.h"
		#include "radeon.h"
		#include "atom.h"
		@@ -348,6 +349,9 @@ bool radeon_card_posted(struct radeon_device *rdev)
		{
		uint32_t reg;

		if (efi_enabled && rdev->pdev->subsystem_vendor == PCI_VENDOR_ID_APPLE)
		return false;

		/* first check CRTCs */
		if (ASIC_IS_DCE41(rdev)) {
		reg = RREG32(EVERGREEN_CRTC_CONTROL + EVERGREEN_CRTC0_REGISTER_OFFSET) \|