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drm/radeon: properly lock disp in mc_stop/resume for evergreen+

Browse source 
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
This commit is contained in:
Alex Deucher 2013-04-10 09:58:42 -04:00
parent 2f86e2ede3
commit 968c01664c
2 changed files with 45 additions and 4 deletions
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47
drivers/gpu/drm/radeon/evergreen.c
View file

@ -1575,18 +1575,14 @@ void evergreen_mc_stop(struct radeon_device *rdev, struct evergreen_mc_save *sav
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 @@ void evergreen_mc_stop(struct radeon_device *rdev, struct evergreen_mc_save *sav
}
/* 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 @@ void evergreen_mc_resume(struct radeon_device *rdev, struct evergreen_mc_save *s
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;

2
drivers/gpu/drm/radeon/evergreen_reg.h
View file

@ -226,6 +226,8 @@
#define EVERGREEN_CRTC_STATUS_HV_COUNT 0x6ea0
#define EVERGREEN_MASTER_UPDATE_MODE 0x6ef8
#define EVERGREEN_CRTC_UPDATE_LOCK 0x6ed4
#define EVERGREEN_MASTER_UPDATE_LOCK 0x6ef4
#define EVERGREEN_MASTER_UPDATE_MODE 0x6ef8
#define EVERGREEN_DC_GPIO_HPD_MASK 0x64b0
#define EVERGREEN_DC_GPIO_HPD_A 0x64b4