[PATCH 12/23] drm: omapdrm: plane: update fifo size on atomic update

Sebastian Reichel
2016-03-08T16:58:05Z

This is a workaround for a hardware bug occuring
on OMAP3 with manually updated panels.

Signed-off-By: Sebastian Reichel <sre@kernel.org>
---
drivers/gpu/drm/omapdrm/omap_drv.h | 1 +
drivers/gpu/drm/omapdrm/omap_plane.c | 23 +++++++++++++++++++++++
2 files changed, 24 insertions(+)

diff --git a/drivers/gpu/drm/omapdrm/omap_drv.h b/drivers/gpu/drm/omapdrm/omap_drv.h
index 71e2c2284b86..3ab4919aff4b 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.h
+++ b/drivers/gpu/drm/omapdrm/omap_drv.h
@@ -161,6 +161,7 @@ struct drm_plane *omap_plane_init(struct drm_device *dev,
int id, enum drm_plane_type type);
void omap_plane_install_properties(struct drm_plane *plane,
struct drm_mode_object *obj);
+void omap_plane_update_fifo(struct drm_plane *plane);

struct drm_encoder *omap_encoder_init(struct drm_device *dev,
struct omap_dss_device *dssdev);
diff --git a/drivers/gpu/drm/omapdrm/omap_plane.c b/drivers/gpu/drm/omapdrm/omap_plane.c
index d75b197eff46..0147e416140c 100644
--- a/drivers/gpu/drm/omapdrm/omap_plane.c
+++ b/drivers/gpu/drm/omapdrm/omap_plane.c
@@ -75,6 +75,28 @@ static void omap_plane_cleanup_fb(struct drm_plane *plane,
omap_framebuffer_unpin(old_state->fb);
}

+void omap_plane_update_fifo(struct drm_plane *plane)
+{
+ struct omap_plane *omap_plane = to_omap_plane(plane);
+ struct drm_plane_state *state = plane->state;
+ struct drm_device *dev = plane->dev;
+ bool use_fifo_merge = false;
+ u32 fifo_low, fifo_high;
+ bool use_manual_update;
+
+ if (!dispc_ovl_enabled(omap_plane->id))
+ return;
+
+ use_manual_update = omap_crtc_is_manual_updated(state->crtc);
+
+ dispc_ovl_compute_fifo_thresholds(omap_plane->id, &fifo_low, &fifo_high,
+ use_fifo_merge, use_manual_update);
+
+ dev_dbg(dev->dev, "update fifo: %d %d", fifo_low, fifo_high);
+
+ dispc_ovl_set_fifo_threshold(omap_plane->id, fifo_low, fifo_high);
+}
+
static void omap_plane_atomic_update(struct drm_plane *plane,
struct drm_plane_state *old_state)
{
@@ -141,6 +163,7 @@ static void omap_plane_atomic_update(struct drm_plane *plane,
}

dispc_ovl_enable(omap_plane->id, true);
+ omap_plane_update_fifo(plane);
}

static void omap_plane_atomic_disable(struct drm_plane *plane,
--
2.7.0