drm/radeon: properly lock disp in mc_stop/resume for evergreen+
Need to wait for the new addresses to take affect before
re-enabling the MC.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index f8a5b60..42111e6 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -1575,18 +1575,14 @@
if (!(tmp & EVERGREEN_CRTC_BLANK_DATA_EN)) {
radeon_wait_for_vblank(rdev, i);
tmp |= EVERGREEN_CRTC_BLANK_DATA_EN;
- WREG32(EVERGREEN_CRTC_UPDATE_LOCK + crtc_offsets[i], 1);
WREG32(EVERGREEN_CRTC_BLANK_CONTROL + crtc_offsets[i], tmp);
- WREG32(EVERGREEN_CRTC_UPDATE_LOCK + crtc_offsets[i], 0);
}
} else {
tmp = RREG32(EVERGREEN_CRTC_CONTROL + crtc_offsets[i]);
if (!(tmp & EVERGREEN_CRTC_DISP_READ_REQUEST_DISABLE)) {
radeon_wait_for_vblank(rdev, i);
tmp |= EVERGREEN_CRTC_DISP_READ_REQUEST_DISABLE;
- WREG32(EVERGREEN_CRTC_UPDATE_LOCK + crtc_offsets[i], 1);
WREG32(EVERGREEN_CRTC_CONTROL + crtc_offsets[i], tmp);
- WREG32(EVERGREEN_CRTC_UPDATE_LOCK + crtc_offsets[i], 0);
}
}
/* wait for the next frame */
@@ -1613,6 +1609,22 @@
}
/* wait for the MC to settle */
udelay(100);
+
+ /* lock double buffered regs */
+ for (i = 0; i < rdev->num_crtc; i++) {
+ if (save->crtc_enabled[i]) {
+ tmp = RREG32(EVERGREEN_GRPH_UPDATE + crtc_offsets[i]);
+ if (!(tmp & EVERGREEN_GRPH_UPDATE_LOCK)) {
+ tmp |= EVERGREEN_GRPH_UPDATE_LOCK;
+ WREG32(EVERGREEN_GRPH_UPDATE + crtc_offsets[i], tmp);
+ }
+ tmp = RREG32(EVERGREEN_MASTER_UPDATE_LOCK + crtc_offsets[i]);
+ if (!(tmp & 1)) {
+ tmp |= 1;
+ WREG32(EVERGREEN_MASTER_UPDATE_LOCK + crtc_offsets[i], tmp);
+ }
+ }
+ }
}
void evergreen_mc_resume(struct radeon_device *rdev, struct evergreen_mc_save *save)
@@ -1634,6 +1646,33 @@
WREG32(EVERGREEN_VGA_MEMORY_BASE_ADDRESS_HIGH, upper_32_bits(rdev->mc.vram_start));
WREG32(EVERGREEN_VGA_MEMORY_BASE_ADDRESS, (u32)rdev->mc.vram_start);
+ /* unlock regs and wait for update */
+ for (i = 0; i < rdev->num_crtc; i++) {
+ if (save->crtc_enabled[i]) {
+ tmp = RREG32(EVERGREEN_MASTER_UPDATE_MODE + crtc_offsets[i]);
+ if ((tmp & 0x3) != 0) {
+ tmp &= ~0x3;
+ WREG32(EVERGREEN_MASTER_UPDATE_MODE + crtc_offsets[i], tmp);
+ }
+ tmp = RREG32(EVERGREEN_GRPH_UPDATE + crtc_offsets[i]);
+ if (tmp & EVERGREEN_GRPH_UPDATE_LOCK) {
+ tmp &= ~EVERGREEN_GRPH_UPDATE_LOCK;
+ WREG32(EVERGREEN_GRPH_UPDATE + crtc_offsets[i], tmp);
+ }
+ tmp = RREG32(EVERGREEN_MASTER_UPDATE_LOCK + crtc_offsets[i]);
+ if (tmp & 1) {
+ tmp &= ~1;
+ WREG32(EVERGREEN_MASTER_UPDATE_LOCK + crtc_offsets[i], tmp);
+ }
+ for (j = 0; j < rdev->usec_timeout; j++) {
+ tmp = RREG32(EVERGREEN_GRPH_UPDATE + crtc_offsets[i]);
+ if ((tmp & EVERGREEN_GRPH_SURFACE_UPDATE_PENDING) == 0)
+ break;
+ udelay(1);
+ }
+ }
+ }
+
/* unblackout the MC */
tmp = RREG32(MC_SHARED_BLACKOUT_CNTL);
tmp &= ~BLACKOUT_MODE_MASK;