drm/amdgpu/dce8: fix flash with white screen on monitor

Fixed mc stop and resume hardware programming sequence.

Signed-off-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c
index 300ff4a..4fdfab1 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c
@@ -526,36 +526,16 @@ static void dce_v8_0_stop_mc_access(struct amdgpu_device *adev,
                crtc_enabled = REG_GET_FIELD(RREG32(mmCRTC_CONTROL + crtc_offsets[i]),
                                             CRTC_CONTROL, CRTC_MASTER_EN);
                if (crtc_enabled) {
-#if 0
-                       u32 frame_count;
-                       int j;
-
+#if 1
                        save->crtc_enabled[i] = true;
                        tmp = RREG32(mmCRTC_BLANK_CONTROL + crtc_offsets[i]);
                        if (REG_GET_FIELD(tmp, CRTC_BLANK_CONTROL, CRTC_BLANK_DATA_EN) == 0) {
-                               amdgpu_display_vblank_wait(adev, i);
-                               WREG32(mmCRTC_UPDATE_LOCK + crtc_offsets[i], 1);
+                               /*it is correct only for RGB ; black is 0*/
+                               WREG32(mmCRTC_BLANK_DATA_COLOR + crtc_offsets[i], 0);
                                tmp = REG_SET_FIELD(tmp, CRTC_BLANK_CONTROL, CRTC_BLANK_DATA_EN, 1);
                                WREG32(mmCRTC_BLANK_CONTROL + crtc_offsets[i], tmp);
-                               WREG32(mmCRTC_UPDATE_LOCK + crtc_offsets[i], 0);
-                       }
-                       /* wait for the next frame */
-                       frame_count = amdgpu_display_vblank_get_counter(adev, i);
-                       for (j = 0; j < adev->usec_timeout; j++) {
-                               if (amdgpu_display_vblank_get_counter(adev, i) != frame_count)
-                                       break;
-                               udelay(1);
-                       }
-                       tmp = RREG32(mmGRPH_UPDATE + crtc_offsets[i]);
-                       if (REG_GET_FIELD(tmp, GRPH_UPDATE, GRPH_UPDATE_LOCK) == 0) {
-                               tmp = REG_SET_FIELD(tmp, GRPH_UPDATE, GRPH_UPDATE_LOCK, 1);
-                               WREG32(mmGRPH_UPDATE + crtc_offsets[i], tmp);
-                       }
-                       tmp = RREG32(mmMASTER_UPDATE_LOCK + crtc_offsets[i]);
-                       if (REG_GET_FIELD(tmp, MASTER_UPDATE_LOCK, MASTER_UPDATE_LOCK) == 0) {
-                               tmp = REG_SET_FIELD(tmp, MASTER_UPDATE_LOCK, MASTER_UPDATE_LOCK, 1);
-                               WREG32(mmMASTER_UPDATE_LOCK + crtc_offsets[i], tmp);
                        }
+                       mdelay(20);
 #else
                        /* XXX this is a hack to avoid strange behavior with EFI on certain systems */
                        WREG32(mmCRTC_UPDATE_LOCK + crtc_offsets[i], 1);
@@ -575,55 +555,22 @@ static void dce_v8_0_stop_mc_access(struct amdgpu_device *adev,
 static void dce_v8_0_resume_mc_access(struct amdgpu_device *adev,
                                      struct amdgpu_mode_mc_save *save)
 {
-       u32 tmp, frame_count;
-       int i, j;
+       u32 tmp;
+       int i;
 
        /* update crtc base addresses */
        for (i = 0; i < adev->mode_info.num_crtc; i++) {
                WREG32(mmGRPH_PRIMARY_SURFACE_ADDRESS_HIGH + crtc_offsets[i],
                       upper_32_bits(adev->mc.vram_start));
-               WREG32(mmGRPH_SECONDARY_SURFACE_ADDRESS_HIGH + crtc_offsets[i],
-                      upper_32_bits(adev->mc.vram_start));
                WREG32(mmGRPH_PRIMARY_SURFACE_ADDRESS + crtc_offsets[i],
                       (u32)adev->mc.vram_start);
-               WREG32(mmGRPH_SECONDARY_SURFACE_ADDRESS + crtc_offsets[i],
-                      (u32)adev->mc.vram_start);
 
                if (save->crtc_enabled[i]) {
-                       tmp = RREG32(mmMASTER_UPDATE_MODE + crtc_offsets[i]);
-                       if (REG_GET_FIELD(tmp, MASTER_UPDATE_MODE, MASTER_UPDATE_MODE) != 3) {
-                               tmp = REG_SET_FIELD(tmp, MASTER_UPDATE_MODE, MASTER_UPDATE_MODE, 3);
-                               WREG32(mmMASTER_UPDATE_MODE + crtc_offsets[i], tmp);
-                       }
-                       tmp = RREG32(mmGRPH_UPDATE + crtc_offsets[i]);
-                       if (REG_GET_FIELD(tmp, GRPH_UPDATE, GRPH_UPDATE_LOCK)) {
-                               tmp = REG_SET_FIELD(tmp, GRPH_UPDATE, GRPH_UPDATE_LOCK, 0);
-                               WREG32(mmGRPH_UPDATE + crtc_offsets[i], tmp);
-                       }
-                       tmp = RREG32(mmMASTER_UPDATE_LOCK + crtc_offsets[i]);
-                       if (REG_GET_FIELD(tmp, MASTER_UPDATE_LOCK, MASTER_UPDATE_LOCK)) {
-                               tmp = REG_SET_FIELD(tmp, MASTER_UPDATE_LOCK, MASTER_UPDATE_LOCK, 0);
-                               WREG32(mmMASTER_UPDATE_LOCK + crtc_offsets[i], tmp);
-                       }
-                       for (j = 0; j < adev->usec_timeout; j++) {
-                               tmp = RREG32(mmGRPH_UPDATE + crtc_offsets[i]);
-                               if (REG_GET_FIELD(tmp, GRPH_UPDATE, GRPH_SURFACE_UPDATE_PENDING) == 0)
-                                       break;
-                               udelay(1);
-                       }
                        tmp = RREG32(mmCRTC_BLANK_CONTROL + crtc_offsets[i]);
                        tmp = REG_SET_FIELD(tmp, CRTC_BLANK_CONTROL, CRTC_BLANK_DATA_EN, 0);
-                       WREG32(mmCRTC_UPDATE_LOCK + crtc_offsets[i], 1);
                        WREG32(mmCRTC_BLANK_CONTROL + crtc_offsets[i], tmp);
-                       WREG32(mmCRTC_UPDATE_LOCK + crtc_offsets[i], 0);
-                       /* wait for the next frame */
-                       frame_count = amdgpu_display_vblank_get_counter(adev, i);
-                       for (j = 0; j < adev->usec_timeout; j++) {
-                               if (amdgpu_display_vblank_get_counter(adev, i) != frame_count)
-                                       break;
-                               udelay(1);
-                       }
                }
+               mdelay(20);
        }
 
        WREG32(mmVGA_MEMORY_BASE_ADDRESS_HIGH, upper_32_bits(adev->mc.vram_start));