drm/radeon/kms: drop taking lock around crtc lookup.

We only add/remove crtcs at driver load, you cannot remove when the GPU is running a CS packet since the fd is open, when GPU hotplugging on radeons actually is needed all this locking needs a review and I've started re-working kms core locking to deal with this better. But for now avoid long delays in CS processing when hotplug detect is happening in a different thread. this fixes a regression introduced with hotplug detection. Signed-off-by: Dave Airlie <airlied@redhat.com>
torvalds · Jul 21, 2010 · 29508eb · 29508eb
1 parent c42750b
commit 29508eb
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Showing 3 changed files with 1 addition and 6 deletions.
diff --git a/drivers/gpu/drm/radeon/evergreen_cs.c b/drivers/gpu/drm/radeon/evergreen_cs.c
@@ -333,7 +333,6 @@ static int evergreen_cs_packet_parse_vline(struct radeon_cs_parser *p)
 	header = radeon_get_ib_value(p, h_idx);
 	crtc_id = radeon_get_ib_value(p, h_idx + 2 + 7 + 1);
 	reg = CP_PACKET0_GET_REG(header);
-	mutex_lock(&p->rdev->ddev->mode_config.mutex);
 	obj = drm_mode_object_find(p->rdev->ddev, crtc_id, DRM_MODE_OBJECT_CRTC);
 	if (!obj) {
 		DRM_ERROR("cannot find crtc %d\n", crtc_id);
@@ -368,7 +367,6 @@ static int evergreen_cs_packet_parse_vline(struct radeon_cs_parser *p)
 		}
 	}
 out:
-	mutex_unlock(&p->rdev->ddev->mode_config.mutex);
 	return r;
 }
 

diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
@@ -1230,7 +1230,6 @@ int r100_cs_packet_parse_vline(struct radeon_cs_parser *p)
 	header = radeon_get_ib_value(p, h_idx);
 	crtc_id = radeon_get_ib_value(p, h_idx + 5);
 	reg = CP_PACKET0_GET_REG(header);
-	mutex_lock(&p->rdev->ddev->mode_config.mutex);
 	obj = drm_mode_object_find(p->rdev->ddev, crtc_id, DRM_MODE_OBJECT_CRTC);
 	if (!obj) {
 		DRM_ERROR("cannot find crtc %d\n", crtc_id);
@@ -1264,7 +1263,6 @@ int r100_cs_packet_parse_vline(struct radeon_cs_parser *p)
 		ib[h_idx + 3] |= RADEON_ENG_DISPLAY_SELECT_CRTC1;
 	}
 out:
-	mutex_unlock(&p->rdev->ddev->mode_config.mutex);
 	return r;
 }
 

diff --git a/drivers/gpu/drm/radeon/r600_cs.c b/drivers/gpu/drm/radeon/r600_cs.c
@@ -585,7 +585,7 @@ static int r600_cs_packet_parse_vline(struct radeon_cs_parser *p)
 	header = radeon_get_ib_value(p, h_idx);
 	crtc_id = radeon_get_ib_value(p, h_idx + 2 + 7 + 1);
 	reg = CP_PACKET0_GET_REG(header);
-	mutex_lock(&p->rdev->ddev->mode_config.mutex);
+
 	obj = drm_mode_object_find(p->rdev->ddev, crtc_id, DRM_MODE_OBJECT_CRTC);
 	if (!obj) {
 		DRM_ERROR("cannot find crtc %d\n", crtc_id);
@@ -620,7 +620,6 @@ static int r600_cs_packet_parse_vline(struct radeon_cs_parser *p)
 		ib[h_idx + 4] = AVIVO_D2MODE_VLINE_STATUS >> 2;
 	}
 out:
-	mutex_unlock(&p->rdev->ddev->mode_config.mutex);
 	return r;
 }