drm/amdgpu: remove *_mc_access from display funcs

These are no longer needed now that we use the fb_location
programmed by the vbios.

Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

11 files changed, 51 insertions, 505 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 407b6c6736ec..20e0ed96efbb 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -613,7 +613,6 @@ struct amdgpu_mc {
 	struct amdgpu_irq_src	vm_fault;
 	uint32_t		vram_type;
 	uint32_t                srbm_soft_reset;
-	struct amdgpu_mode_mc_save save;
 	bool			prt_warning;
 	uint64_t		stolen_size;
 	/* apertures */
@@ -1910,8 +1909,6 @@ amdgpu_get_sdma_instance(struct amdgpu_ring *ring)
 #define amdgpu_display_page_flip_get_scanoutpos(adev, crtc, vbl, pos) (adev)->mode_info.funcs->page_flip_get_scanoutpos((adev), (crtc), (vbl), (pos))
 #define amdgpu_display_add_encoder(adev, e, s, c) (adev)->mode_info.funcs->add_encoder((adev), (e), (s), (c))
 #define amdgpu_display_add_connector(adev, ci, sd, ct, ib, coi, h, r) (adev)->mode_info.funcs->add_connector((adev), (ci), (sd), (ct), (ib), (coi), (h), (r))
-#define amdgpu_display_stop_mc_access(adev, s) (adev)->mode_info.funcs->stop_mc_access((adev), (s))
-#define amdgpu_display_resume_mc_access(adev, s) (adev)->mode_info.funcs->resume_mc_access((adev), (s))
 #define amdgpu_emit_copy_buffer(adev, ib, s, d, b) (adev)->mman.buffer_funcs->emit_copy_buffer((ib),  (s), (d), (b))
 #define amdgpu_emit_fill_buffer(adev, ib, s, d, b) (adev)->mman.buffer_funcs->emit_fill_buffer((ib), (s), (d), (b))
 #define amdgpu_gfx_get_gpu_clock_counter(adev) (adev)->gfx.funcs->get_gpu_clock_counter((adev))
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index f3811f6197e0..ae4387fd2b65 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2851,12 +2851,6 @@ int amdgpu_gpu_reset(struct amdgpu_device *adev)
 		r = amdgpu_suspend(adev);
 
 retry:
-		/* Disable fb access */
-		if (adev->mode_info.num_crtc) {
-			struct amdgpu_mode_mc_save save;
-			amdgpu_display_stop_mc_access(adev, &save);
-			amdgpu_wait_for_idle(adev, AMD_IP_BLOCK_TYPE_GMC);
-		}
 		if (adev->is_atom_fw)
 			amdgpu_atomfirmware_scratch_regs_save(adev);
 		else
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
index 35bd93cb0c19..b8abd4e18d51 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
@@ -257,12 +257,6 @@ struct amdgpu_audio {
 	int num_pins;
 };
 
-struct amdgpu_mode_mc_save {
-	u32 vga_render_control;
-	u32 vga_hdp_control;
-	bool crtc_enabled[AMDGPU_MAX_CRTCS];
-};
-
 struct amdgpu_display_funcs {
 	/* display watermarks */
 	void (*bandwidth_update)(struct amdgpu_device *adev);
@@ -298,10 +292,6 @@ struct amdgpu_display_funcs {
 			      uint16_t connector_object_id,
 			      struct amdgpu_hpd *hpd,
 			      struct amdgpu_router *router);
-	void (*stop_mc_access)(struct amdgpu_device *adev,
-			       struct amdgpu_mode_mc_save *save);
-	void (*resume_mc_access)(struct amdgpu_device *adev,
-				 struct amdgpu_mode_mc_save *save);
 };
 
 struct amdgpu_mode_info {
diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c
index fba084dc43a2..16915a92672b 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c
@@ -484,134 +484,6 @@ static bool dce_v10_0_is_display_hung(struct amdgpu_device *adev)
 	return true;
 }
 
-static void dce_v10_0_stop_mc_access(struct amdgpu_device *adev,
-				     struct amdgpu_mode_mc_save *save)
-{
-	u32 crtc_enabled, tmp;
-	int i;
-
-	save->vga_render_control = RREG32(mmVGA_RENDER_CONTROL);
-	save->vga_hdp_control = RREG32(mmVGA_HDP_CONTROL);
-
-	/* disable VGA render */
-	tmp = RREG32(mmVGA_RENDER_CONTROL);
-	tmp = REG_SET_FIELD(tmp, VGA_RENDER_CONTROL, VGA_VSTATUS_CNTL, 0);
-	WREG32(mmVGA_RENDER_CONTROL, tmp);
-
-	/* blank the display controllers */
-	for (i = 0; i < adev->mode_info.num_crtc; i++) {
-		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;
-
-			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);
-				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);
-			}
-#else
-			/* XXX this is a hack to avoid strange behavior with EFI on certain systems */
-			WREG32(mmCRTC_UPDATE_LOCK + crtc_offsets[i], 1);
-			tmp = RREG32(mmCRTC_CONTROL + crtc_offsets[i]);
-			tmp = REG_SET_FIELD(tmp, CRTC_CONTROL, CRTC_MASTER_EN, 0);
-			WREG32(mmCRTC_CONTROL + crtc_offsets[i], tmp);
-			WREG32(mmCRTC_UPDATE_LOCK + crtc_offsets[i], 0);
-			save->crtc_enabled[i] = false;
-			/* ***** */
-#endif
-		} else {
-			save->crtc_enabled[i] = false;
-		}
-	}
-}
-
-static void dce_v10_0_resume_mc_access(struct amdgpu_device *adev,
-				       struct amdgpu_mode_mc_save *save)
-{
-	u32 tmp, frame_count;
-	int i, j;
-
-	/* 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) != 0) {
-				tmp = REG_SET_FIELD(tmp, MASTER_UPDATE_MODE, MASTER_UPDATE_MODE, 0);
-				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);
-			}
-		}
-	}
-
-	WREG32(mmVGA_MEMORY_BASE_ADDRESS_HIGH, upper_32_bits(adev->mc.vram_start));
-	WREG32(mmVGA_MEMORY_BASE_ADDRESS, lower_32_bits(adev->mc.vram_start));
-
-	/* Unlock vga access */
-	WREG32(mmVGA_HDP_CONTROL, save->vga_hdp_control);
-	mdelay(1);
-	WREG32(mmVGA_RENDER_CONTROL, save->vga_render_control);
-}
-
 static void dce_v10_0_set_vga_render_state(struct amdgpu_device *adev,
 					   bool render)
 {
@@ -3751,8 +3623,6 @@ static const struct amdgpu_display_funcs dce_v10_0_display_funcs = {
 	.page_flip_get_scanoutpos = &dce_v10_0_crtc_get_scanoutpos,
 	.add_encoder = &dce_v10_0_encoder_add,
 	.add_connector = &amdgpu_connector_add,
-	.stop_mc_access = &dce_v10_0_stop_mc_access,
-	.resume_mc_access = &dce_v10_0_resume_mc_access,
 };
 
 static void dce_v10_0_set_display_funcs(struct amdgpu_device *adev)
diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c
index 4eb3b90903ac..6a43f25c5d96 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c
@@ -499,79 +499,6 @@ static bool dce_v11_0_is_display_hung(struct amdgpu_device *adev)
 	return true;
 }
 
-static void dce_v11_0_stop_mc_access(struct amdgpu_device *adev,
-				     struct amdgpu_mode_mc_save *save)
-{
-	u32 crtc_enabled, tmp;
-	int i;
-
-	save->vga_render_control = RREG32(mmVGA_RENDER_CONTROL);
-	save->vga_hdp_control = RREG32(mmVGA_HDP_CONTROL);
-
-	/* disable VGA render */
-	tmp = RREG32(mmVGA_RENDER_CONTROL);
-	tmp = REG_SET_FIELD(tmp, VGA_RENDER_CONTROL, VGA_VSTATUS_CNTL, 0);
-	WREG32(mmVGA_RENDER_CONTROL, tmp);
-
-	/* blank the display controllers */
-	for (i = 0; i < adev->mode_info.num_crtc; i++) {
-		crtc_enabled = REG_GET_FIELD(RREG32(mmCRTC_CONTROL + crtc_offsets[i]),
-					     CRTC_CONTROL, CRTC_MASTER_EN);
-		if (crtc_enabled) {
-#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) {
-				/*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);
-			}
-#else
-			/* XXX this is a hack to avoid strange behavior with EFI on certain systems */
-			WREG32(mmCRTC_UPDATE_LOCK + crtc_offsets[i], 1);
-			tmp = RREG32(mmCRTC_CONTROL + crtc_offsets[i]);
-			tmp = REG_SET_FIELD(tmp, CRTC_CONTROL, CRTC_MASTER_EN, 0);
-			WREG32(mmCRTC_CONTROL + crtc_offsets[i], tmp);
-			WREG32(mmCRTC_UPDATE_LOCK + crtc_offsets[i], 0);
-			save->crtc_enabled[i] = false;
-			/* ***** */
-#endif
-		} else {
-			save->crtc_enabled[i] = false;
-		}
-	}
-}
-
-static void dce_v11_0_resume_mc_access(struct amdgpu_device *adev,
-				       struct amdgpu_mode_mc_save *save)
-{
-	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_PRIMARY_SURFACE_ADDRESS + crtc_offsets[i],
-		       (u32)adev->mc.vram_start);
-
-		if (save->crtc_enabled[i]) {
-			tmp = RREG32(mmCRTC_BLANK_CONTROL + crtc_offsets[i]);
-			tmp = REG_SET_FIELD(tmp, CRTC_BLANK_CONTROL, CRTC_BLANK_DATA_EN, 0);
-			WREG32(mmCRTC_BLANK_CONTROL + crtc_offsets[i], tmp);
-		}
-	}
-
-	WREG32(mmVGA_MEMORY_BASE_ADDRESS_HIGH, upper_32_bits(adev->mc.vram_start));
-	WREG32(mmVGA_MEMORY_BASE_ADDRESS, lower_32_bits(adev->mc.vram_start));
-
-	/* Unlock vga access */
-	WREG32(mmVGA_HDP_CONTROL, save->vga_hdp_control);
-	mdelay(1);
-	WREG32(mmVGA_RENDER_CONTROL, save->vga_render_control);
-}
-
 static void dce_v11_0_set_vga_render_state(struct amdgpu_device *adev,
 					   bool render)
 {
@@ -3820,8 +3747,6 @@ static const struct amdgpu_display_funcs dce_v11_0_display_funcs = {
 	.page_flip_get_scanoutpos = &dce_v11_0_crtc_get_scanoutpos,
 	.add_encoder = &dce_v11_0_encoder_add,
 	.add_connector = &amdgpu_connector_add,
-	.stop_mc_access = &dce_v11_0_stop_mc_access,
-	.resume_mc_access = &dce_v11_0_resume_mc_access,
 };
 
 static void dce_v11_0_set_display_funcs(struct amdgpu_device *adev)
diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
index fde68b959e91..48d5dd4974de 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
@@ -392,117 +392,6 @@ static u32 dce_v6_0_hpd_get_gpio_reg(struct amdgpu_device *adev)
 	return mmDC_GPIO_HPD_A;
 }
 
-static u32 evergreen_get_vblank_counter(struct amdgpu_device* adev, int crtc)
-{
-	if (crtc >= adev->mode_info.num_crtc)
-		return 0;
-	else
-		return RREG32(mmCRTC_STATUS_FRAME_COUNT + crtc_offsets[crtc]);
-}
-
-static void dce_v6_0_stop_mc_access(struct amdgpu_device *adev,
-				    struct amdgpu_mode_mc_save *save)
-{
-	u32 crtc_enabled, tmp, frame_count;
-	int i, j;
-
-	save->vga_render_control = RREG32(mmVGA_RENDER_CONTROL);
-	save->vga_hdp_control = RREG32(mmVGA_HDP_CONTROL);
-
-	/* disable VGA render */
-	WREG32(mmVGA_RENDER_CONTROL, 0);
-
-	/* blank the display controllers */
-	for (i = 0; i < adev->mode_info.num_crtc; i++) {
-		crtc_enabled = RREG32(mmCRTC_CONTROL + crtc_offsets[i]) & CRTC_CONTROL__CRTC_MASTER_EN_MASK;
-		if (crtc_enabled) {
-			save->crtc_enabled[i] = true;
-			tmp = RREG32(mmCRTC_BLANK_CONTROL + crtc_offsets[i]);
-
-			if (!(tmp & CRTC_BLANK_CONTROL__CRTC_BLANK_DATA_EN_MASK)) {
-				dce_v6_0_vblank_wait(adev, i);
-				WREG32(mmCRTC_UPDATE_LOCK + crtc_offsets[i], 1);
-				tmp |= CRTC_BLANK_CONTROL__CRTC_BLANK_DATA_EN_MASK;
-				WREG32(mmCRTC_BLANK_CONTROL + crtc_offsets[i], tmp);
-				WREG32(mmCRTC_UPDATE_LOCK + crtc_offsets[i], 0);
-			}
-			/* wait for the next frame */
-			frame_count = evergreen_get_vblank_counter(adev, i);
-			for (j = 0; j < adev->usec_timeout; j++) {
-				if (evergreen_get_vblank_counter(adev, i) != frame_count)
-					break;
-				udelay(1);
-			}
-
-			/* XXX this is a hack to avoid strange behavior with EFI on certain systems */
-			WREG32(mmCRTC_UPDATE_LOCK + crtc_offsets[i], 1);
-			tmp = RREG32(mmCRTC_CONTROL + crtc_offsets[i]);
-			tmp &= ~CRTC_CONTROL__CRTC_MASTER_EN_MASK;
-			WREG32(mmCRTC_CONTROL + crtc_offsets[i], tmp);
-			WREG32(mmCRTC_UPDATE_LOCK + crtc_offsets[i], 0);
-			save->crtc_enabled[i] = false;
-			/* ***** */
-		} else {
-			save->crtc_enabled[i] = false;
-		}
-	}
-}
-
-static void dce_v6_0_resume_mc_access(struct amdgpu_device *adev,
-				      struct amdgpu_mode_mc_save *save)
-{
-	u32 tmp;
-	int i, j;
-
-	/* 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);
-	}
-
-	WREG32(mmVGA_MEMORY_BASE_ADDRESS_HIGH, upper_32_bits(adev->mc.vram_start));
-	WREG32(mmVGA_MEMORY_BASE_ADDRESS, (u32)adev->mc.vram_start);
-
-	/* unlock regs and wait for update */
-	for (i = 0; i < adev->mode_info.num_crtc; i++) {
-		if (save->crtc_enabled[i]) {
-			tmp = RREG32(mmMASTER_UPDATE_MODE + crtc_offsets[i]);
-			if ((tmp & 0x7) != 0) {
-				tmp &= ~0x7;
-				WREG32(mmMASTER_UPDATE_MODE + crtc_offsets[i], tmp);
-			}
-			tmp = RREG32(mmGRPH_UPDATE + crtc_offsets[i]);
-			if (tmp & GRPH_UPDATE__GRPH_UPDATE_LOCK_MASK) {
-				tmp &= ~GRPH_UPDATE__GRPH_UPDATE_LOCK_MASK;
-				WREG32(mmGRPH_UPDATE + crtc_offsets[i], tmp);
-			}
-			tmp = RREG32(mmMASTER_UPDATE_LOCK + crtc_offsets[i]);
-			if (tmp & 1) {
-				tmp &= ~1;
-				WREG32(mmMASTER_UPDATE_LOCK + crtc_offsets[i], tmp);
-			}
-			for (j = 0; j < adev->usec_timeout; j++) {
-				tmp = RREG32(mmGRPH_UPDATE + crtc_offsets[i]);
-				if ((tmp & GRPH_UPDATE__GRPH_SURFACE_UPDATE_PENDING_MASK) == 0)
-					break;
-				udelay(1);
-			}
-		}
-	}
-
-	/* Unlock vga access */
-	WREG32(mmVGA_HDP_CONTROL, save->vga_hdp_control);
-	mdelay(1);
-	WREG32(mmVGA_RENDER_CONTROL, save->vga_render_control);
-
-}
-
 static void dce_v6_0_set_vga_render_state(struct amdgpu_device *adev,
 					  bool render)
 {
@@ -3539,8 +3428,6 @@ static const struct amdgpu_display_funcs dce_v6_0_display_funcs = {
 	.page_flip_get_scanoutpos = &dce_v6_0_crtc_get_scanoutpos,
 	.add_encoder = &dce_v6_0_encoder_add,
 	.add_connector = &amdgpu_connector_add,
-	.stop_mc_access = &dce_v6_0_stop_mc_access,
-	.resume_mc_access = &dce_v6_0_resume_mc_access,
 };
 
 static void dce_v6_0_set_display_funcs(struct amdgpu_device *adev)
diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c
index 8e530a01ae83..647a48f03574 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c
@@ -419,81 +419,6 @@ static bool dce_v8_0_is_display_hung(struct amdgpu_device *adev)
 	return true;
 }
 
-static void dce_v8_0_stop_mc_access(struct amdgpu_device *adev,
-				    struct amdgpu_mode_mc_save *save)
-{
-	u32 crtc_enabled, tmp;
-	int i;
-
-	save->vga_render_control = RREG32(mmVGA_RENDER_CONTROL);
-	save->vga_hdp_control = RREG32(mmVGA_HDP_CONTROL);
-
-	/* disable VGA render */
-	tmp = RREG32(mmVGA_RENDER_CONTROL);
-	tmp = REG_SET_FIELD(tmp, VGA_RENDER_CONTROL, VGA_VSTATUS_CNTL, 0);
-	WREG32(mmVGA_RENDER_CONTROL, tmp);
-
-	/* blank the display controllers */
-	for (i = 0; i < adev->mode_info.num_crtc; i++) {
-		crtc_enabled = REG_GET_FIELD(RREG32(mmCRTC_CONTROL + crtc_offsets[i]),
-					     CRTC_CONTROL, CRTC_MASTER_EN);
-		if (crtc_enabled) {
-#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) {
-				/*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);
-			}
-			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);
-			tmp = RREG32(mmCRTC_CONTROL + crtc_offsets[i]);
-			tmp = REG_SET_FIELD(tmp, CRTC_CONTROL, CRTC_MASTER_EN, 0);
-			WREG32(mmCRTC_CONTROL + crtc_offsets[i], tmp);
-			WREG32(mmCRTC_UPDATE_LOCK + crtc_offsets[i], 0);
-			save->crtc_enabled[i] = false;
-			/* ***** */
-#endif
-		} else {
-			save->crtc_enabled[i] = false;
-		}
-	}
-}
-
-static void dce_v8_0_resume_mc_access(struct amdgpu_device *adev,
-				      struct amdgpu_mode_mc_save *save)
-{
-	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_PRIMARY_SURFACE_ADDRESS + crtc_offsets[i],
-		       (u32)adev->mc.vram_start);
-
-		if (save->crtc_enabled[i]) {
-			tmp = RREG32(mmCRTC_BLANK_CONTROL + crtc_offsets[i]);
-			tmp = REG_SET_FIELD(tmp, CRTC_BLANK_CONTROL, CRTC_BLANK_DATA_EN, 0);
-			WREG32(mmCRTC_BLANK_CONTROL + crtc_offsets[i], tmp);
-		}
-		mdelay(20);
-	}
-
-	WREG32(mmVGA_MEMORY_BASE_ADDRESS_HIGH, upper_32_bits(adev->mc.vram_start));
-	WREG32(mmVGA_MEMORY_BASE_ADDRESS, lower_32_bits(adev->mc.vram_start));
-
-	/* Unlock vga access */
-	WREG32(mmVGA_HDP_CONTROL, save->vga_hdp_control);
-	mdelay(1);
-	WREG32(mmVGA_RENDER_CONTROL, save->vga_render_control);
-}
-
 static void dce_v8_0_set_vga_render_state(struct amdgpu_device *adev,
 					  bool render)
 {
@@ -3588,8 +3513,6 @@ static const struct amdgpu_display_funcs dce_v8_0_display_funcs = {
 	.page_flip_get_scanoutpos = &dce_v8_0_crtc_get_scanoutpos,
 	.add_encoder = &dce_v8_0_encoder_add,
 	.add_connector = &amdgpu_connector_add,
-	.stop_mc_access = &dce_v8_0_stop_mc_access,
-	.resume_mc_access = &dce_v8_0_resume_mc_access,
 };
 
 static void dce_v8_0_set_display_funcs(struct amdgpu_device *adev)
diff --git a/drivers/gpu/drm/amd/amdgpu/dce_virtual.c b/drivers/gpu/drm/amd/amdgpu/dce_virtual.c
index f257702978fe..5ac2e17b76ac 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_virtual.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_virtual.c
@@ -95,56 +95,6 @@ static u32 dce_virtual_hpd_get_gpio_reg(struct amdgpu_device *adev)
 	return 0;
 }
 
-static void dce_virtual_stop_mc_access(struct amdgpu_device *adev,
-			      struct amdgpu_mode_mc_save *save)
-{
-	switch (adev->asic_type) {
-#ifdef CONFIG_DRM_AMDGPU_SI
-	case CHIP_TAHITI:
-	case CHIP_PITCAIRN:
-	case CHIP_VERDE:
-	case CHIP_OLAND:
-		dce_v6_0_disable_dce(adev);
-		break;
-#endif
-#ifdef CONFIG_DRM_AMDGPU_CIK
-	case CHIP_BONAIRE:
-	case CHIP_HAWAII:
-	case CHIP_KAVERI:
-	case CHIP_KABINI:
-	case CHIP_MULLINS:
-		dce_v8_0_disable_dce(adev);
-		break;
-#endif
-	case CHIP_FIJI:
-	case CHIP_TONGA:
-		dce_v10_0_disable_dce(adev);
-		break;
-	case CHIP_CARRIZO:
-	case CHIP_STONEY:
-	case CHIP_POLARIS10:
-	case CHIP_POLARIS11:
-	case CHIP_POLARIS12:
-		dce_v11_0_disable_dce(adev);
-		break;
-	case CHIP_TOPAZ:
-#ifdef CONFIG_DRM_AMDGPU_SI
-	case CHIP_HAINAN:
-#endif
-		/* no DCE */
-		return;
-	default:
-		DRM_ERROR("Virtual display unsupported ASIC type: 0x%X\n", adev->asic_type);
-	}
-
-	return;
-}
-static void dce_virtual_resume_mc_access(struct amdgpu_device *adev,
-				struct amdgpu_mode_mc_save *save)
-{
-	return;
-}
-
 /**
  * dce_virtual_bandwidth_update - program display watermarks
  *
@@ -516,6 +466,45 @@ static int dce_virtual_sw_fini(void *handle)
 
 static int dce_virtual_hw_init(void *handle)
 {
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+
+	switch (adev->asic_type) {
+#ifdef CONFIG_DRM_AMDGPU_SI
+	case CHIP_TAHITI:
+	case CHIP_PITCAIRN:
+	case CHIP_VERDE:
+	case CHIP_OLAND:
+		dce_v6_0_disable_dce(adev);
+		break;
+#endif
+#ifdef CONFIG_DRM_AMDGPU_CIK
+	case CHIP_BONAIRE:
+	case CHIP_HAWAII:
+	case CHIP_KAVERI:
+	case CHIP_KABINI:
+	case CHIP_MULLINS:
+		dce_v8_0_disable_dce(adev);
+		break;
+#endif
+	case CHIP_FIJI:
+	case CHIP_TONGA:
+		dce_v10_0_disable_dce(adev);
+		break;
+	case CHIP_CARRIZO:
+	case CHIP_STONEY:
+	case CHIP_POLARIS11:
+	case CHIP_POLARIS10:
+		dce_v11_0_disable_dce(adev);
+		break;
+	case CHIP_TOPAZ:
+#ifdef CONFIG_DRM_AMDGPU_SI
+	case CHIP_HAINAN:
+#endif
+		/* no DCE */
+		break;
+	default:
+		DRM_ERROR("Virtual display unsupported ASIC type: 0x%X\n", adev->asic_type);
+	}
 	return 0;
 }
 
@@ -683,8 +672,6 @@ static const struct amdgpu_display_funcs dce_virtual_display_funcs = {
 	.page_flip_get_scanoutpos = &dce_virtual_crtc_get_scanoutpos,
 	.add_encoder = NULL,
 	.add_connector = NULL,
-	.stop_mc_access = &dce_virtual_stop_mc_access,
-	.resume_mc_access = &dce_virtual_resume_mc_access,
 };
 
 static void dce_virtual_set_display_funcs(struct amdgpu_device *adev)
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c
index a652fbaa7b8c..c1a124a86775 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c
@@ -66,14 +66,10 @@ static const u32 crtc_offsets[6] =
 	SI_CRTC5_REGISTER_OFFSET
 };
 
-static void gmc_v6_0_mc_stop(struct amdgpu_device *adev,
-			     struct amdgpu_mode_mc_save *save)
+static void gmc_v6_0_mc_stop(struct amdgpu_device *adev)
 {
 	u32 blackout;
 
-	if (adev->mode_info.num_crtc)
-		amdgpu_display_stop_mc_access(adev, save);
-
 	gmc_v6_0_wait_for_idle((void *)adev);
 
 	blackout = RREG32(mmMC_SHARED_BLACKOUT_CNTL);
@@ -90,8 +86,7 @@ static void gmc_v6_0_mc_stop(struct amdgpu_device *adev,
 
 }
 
-static void gmc_v6_0_mc_resume(struct amdgpu_device *adev,
-			       struct amdgpu_mode_mc_save *save)
+static void gmc_v6_0_mc_resume(struct amdgpu_device *adev)
 {
 	u32 tmp;
 
@@ -103,10 +98,6 @@ static void gmc_v6_0_mc_resume(struct amdgpu_device *adev,
 	tmp = REG_SET_FIELD(0, BIF_FB_EN, FB_READ_EN, 1);
 	tmp = REG_SET_FIELD(tmp, BIF_FB_EN, FB_WRITE_EN, 1);
 	WREG32(mmBIF_FB_EN, tmp);
-
-	if (adev->mode_info.num_crtc)
-		amdgpu_display_resume_mc_access(adev, save);
-
 }
 
 static int gmc_v6_0_init_microcode(struct amdgpu_device *adev)
@@ -975,7 +966,6 @@ static int gmc_v6_0_wait_for_idle(void *handle)
 static int gmc_v6_0_soft_reset(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
-	struct amdgpu_mode_mc_save save;
 	u32 srbm_soft_reset = 0;
 	u32 tmp = RREG32(mmSRBM_STATUS);
 
@@ -991,7 +981,7 @@ static int gmc_v6_0_soft_reset(void *handle)
 	}
 
 	if (srbm_soft_reset) {
-		gmc_v6_0_mc_stop(adev, &save);
+		gmc_v6_0_mc_stop(adev);
 		if (gmc_v6_0_wait_for_idle(adev)) {
 			dev_warn(adev->dev, "Wait for GMC idle timed out !\n");
 		}
@@ -1011,7 +1001,7 @@ static int gmc_v6_0_soft_reset(void *handle)
 
 		udelay(50);
 
-		gmc_v6_0_mc_resume(adev, &save);
+		gmc_v6_0_mc_resume(adev);
 		udelay(50);
 	}
 
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
index 31ad68a68c77..575d72583746 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
@@ -76,14 +76,10 @@ static void gmc_v7_0_init_golden_registers(struct amdgpu_device *adev)
 	}
 }
 
-static void gmc_v7_0_mc_stop(struct amdgpu_device *adev,
-			     struct amdgpu_mode_mc_save *save)
+static void gmc_v7_0_mc_stop(struct amdgpu_device *adev)
 {
 	u32 blackout;
 
-	if (adev->mode_info.num_crtc)
-		amdgpu_display_stop_mc_access(adev, save);
-
 	gmc_v7_0_wait_for_idle((void *)adev);
 
 	blackout = RREG32(mmMC_SHARED_BLACKOUT_CNTL);
@@ -99,8 +95,7 @@ static void gmc_v7_0_mc_stop(struct amdgpu_device *adev,
 	udelay(100);
 }
 
-static void gmc_v7_0_mc_resume(struct amdgpu_device *adev,
-			       struct amdgpu_mode_mc_save *save)
+static void gmc_v7_0_mc_resume(struct amdgpu_device *adev)
 {
 	u32 tmp;
 
@@ -112,9 +107,6 @@ static void gmc_v7_0_mc_resume(struct amdgpu_device *adev,
 	tmp = REG_SET_FIELD(0, BIF_FB_EN, FB_READ_EN, 1);
 	tmp = REG_SET_FIELD(tmp, BIF_FB_EN, FB_WRITE_EN, 1);
 	WREG32(mmBIF_FB_EN, tmp);
-
-	if (adev->mode_info.num_crtc)
-		amdgpu_display_resume_mc_access(adev, save);
 }
 
 /**
@@ -1128,7 +1120,6 @@ static int gmc_v7_0_wait_for_idle(void *handle)
 static int gmc_v7_0_soft_reset(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
-	struct amdgpu_mode_mc_save save;
 	u32 srbm_soft_reset = 0;
 	u32 tmp = RREG32(mmSRBM_STATUS);
 
@@ -1144,7 +1135,7 @@ static int gmc_v7_0_soft_reset(void *handle)
 	}
 
 	if (srbm_soft_reset) {
-		gmc_v7_0_mc_stop(adev, &save);
+		gmc_v7_0_mc_stop(adev);
 		if (gmc_v7_0_wait_for_idle((void *)adev)) {
 			dev_warn(adev->dev, "Wait for GMC idle timed out !\n");
 		}
@@ -1165,7 +1156,7 @@ static int gmc_v7_0_soft_reset(void *handle)
 		/* Wait a little for things to settle down */
 		udelay(50);
 
-		gmc_v7_0_mc_resume(adev, &save);
+		gmc_v7_0_mc_resume(adev);
 		udelay(50);
 	}
 
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
index 72ab2d04f048..6379177b9fcb 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
@@ -161,14 +161,10 @@ static void gmc_v8_0_init_golden_registers(struct amdgpu_device *adev)
 	}
 }
 
-static void gmc_v8_0_mc_stop(struct amdgpu_device *adev,
-			     struct amdgpu_mode_mc_save *save)
+static void gmc_v8_0_mc_stop(struct amdgpu_device *adev)
 {
 	u32 blackout;
 
-	if (adev->mode_info.num_crtc)
-		amdgpu_display_stop_mc_access(adev, save);
-
 	gmc_v8_0_wait_for_idle(adev);
 
 	blackout = RREG32(mmMC_SHARED_BLACKOUT_CNTL);
@@ -184,8 +180,7 @@ static void gmc_v8_0_mc_stop(struct amdgpu_device *adev,
 	udelay(100);
 }
 
-static void gmc_v8_0_mc_resume(struct amdgpu_device *adev,
-			       struct amdgpu_mode_mc_save *save)
+static void gmc_v8_0_mc_resume(struct amdgpu_device *adev)
 {
 	u32 tmp;
 
@@ -197,9 +192,6 @@ static void gmc_v8_0_mc_resume(struct amdgpu_device *adev,
 	tmp = REG_SET_FIELD(0, BIF_FB_EN, FB_READ_EN, 1);
 	tmp = REG_SET_FIELD(tmp, BIF_FB_EN, FB_WRITE_EN, 1);
 	WREG32(mmBIF_FB_EN, tmp);
-
-	if (adev->mode_info.num_crtc)
-		amdgpu_display_resume_mc_access(adev, save);
 }
 
 /**
@@ -1250,7 +1242,7 @@ static int gmc_v8_0_pre_soft_reset(void *handle)
 	if (!adev->mc.srbm_soft_reset)
 		return 0;
 
-	gmc_v8_0_mc_stop(adev, &adev->mc.save);
+	gmc_v8_0_mc_stop(adev);
 	if (gmc_v8_0_wait_for_idle(adev)) {
 		dev_warn(adev->dev, "Wait for GMC idle timed out !\n");
 	}
@@ -1296,7 +1288,7 @@ static int gmc_v8_0_post_soft_reset(void *handle)
 	if (!adev->mc.srbm_soft_reset)
 		return 0;
 
-	gmc_v8_0_mc_resume(adev, &adev->mc.save);
+	gmc_v8_0_mc_resume(adev);
 	return 0;
 }