Add new properties to specify x,y coordinates and
width and height for writeback.
These are reset to 0 on duplicating state to provide
robustness against accidental scaling.
Signed-off-by: Ben Davis <ben.da...@arm.com>
---
drivers/gpu/drm/drm_atomic_state_helper.c | 6 +++
drivers/gpu/drm/drm_atomic_uapi.c | 17 ++++++++
drivers/gpu/drm/drm_writeback.c | 66 +++++++++++++++++++++++++++++++
include/drm/drm_connector.h | 23 +++++++++++
include/drm/drm_mode_config.h | 20 ++++++++++
5 files changed, 132 insertions(+)
diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c
b/drivers/gpu/drm/drm_atomic_state_helper.c
index 25a95b9..5973ca3 100644
--- a/drivers/gpu/drm/drm_atomic_state_helper.c
+++ b/drivers/gpu/drm/drm_atomic_state_helper.c
@@ -382,6 +382,12 @@ __drm_atomic_helper_connector_duplicate_state(struct
drm_connector *connector,
/* Don't copy over a writeback job, they are used only once */
state->writeback_job = NULL;
+
+ /* Auto clear writeback coordinates, should only be used once */
+ state->writeback_dest_x = 0;
+ state->writeback_dest_y = 0;
+ state->writeback_dest_w = 0;
+ state->writeback_dest_h = 0;
}
EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state);
diff --git a/drivers/gpu/drm/drm_atomic_uapi.c
b/drivers/gpu/drm/drm_atomic_uapi.c
index d520a04..7d3fb7f 100644
--- a/drivers/gpu/drm/drm_atomic_uapi.c
+++ b/drivers/gpu/drm/drm_atomic_uapi.c
@@ -765,6 +765,14 @@ static int drm_atomic_connector_set_property(struct
drm_connector *connector,
return -EINVAL;
}
state->content_protection = val;
+ } else if (property == config->prop_writeback_dest_x) {
+ state->writeback_dest_x = val;
+ } else if (property == config->prop_writeback_dest_y) {
+ state->writeback_dest_y = val;
+ } else if (property == config->prop_writeback_dest_w) {
+ state->writeback_dest_w = val;
+ } else if (property == config->prop_writeback_dest_h) {
+ state->writeback_dest_h = val;
} else if (property == config->writeback_fb_id_property) {
struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, NULL,
val);
int ret = drm_atomic_set_writeback_fb_for_connector(state, fb);
@@ -837,6 +845,15 @@ drm_atomic_connector_get_property(struct drm_connector
*connector,
*val = state->scaling_mode;
} else if (property == connector->content_protection_property) {
*val = state->content_protection;
+ } else if (property == config->prop_writeback_dest_x) {
+ /* Auto clear wb co-ordinates to prevent accidental scaling */
+ *val = 0;
+ } else if (property == config->prop_writeback_dest_y) {
+ *val = 0;
+ } else if (property == config->prop_writeback_dest_w) {
+ *val = 0;
+ } else if (property == config->prop_writeback_dest_h) {
+ *val = 0;
} else if (property == config->writeback_fb_id_property) {
/* Writeback framebuffer is one-shot, write and forget */
*val = 0;
diff --git a/drivers/gpu/drm/drm_writeback.c b/drivers/gpu/drm/drm_writeback.c
index c20e6fe..7c53abd 100644
--- a/drivers/gpu/drm/drm_writeback.c
+++ b/drivers/gpu/drm/drm_writeback.c
@@ -74,6 +74,30 @@
* applications making use of writeback connectors *always* retrieve an
* out-fence for the commit and use it appropriately.
* From userspace, this property will always read as zero.
+ *
+ * "WRITEBACK_DEST_X":
+ * The x-coordinate to write back onto the output writeback framebuffer.
+ * 0 acts as default. If non-zero the composition will be translated
+ * horizontally in the buffer by the amount specified. This is the case
+ * even if not scaling on writeback.
+ *
+ * "WRITEBACK_DEST_Y":
+ * The y-coordinate to write back onto the output writeback framebuffer.
+ * 0 acts as default. If non-zero the composition will be translated
+ * vertically in the buffer by the amount specified. This is the case even
+ * if not scaling on writeback.
+ *
+ * "WRITEBACK_DEST_W":
+ * The width of the composition to write back. 0 acts as default. If
+ * non-zero the composition will be scaled to match the given width.
+ * If scaling both WRITEBACK_DEST_W and WRITEBACK_DEST_H should be
+ * set as non-zero.
+ *
+ * "WRITEBACK_DEST_H":
+ * The height of the composition to write back. 0 acts as default. If
+ * non-zero the composition will be scaled to match the given height.
+ * If scaling both WRITEBACK_DEST_W and WRITEBACK_DEST_H should be
+ * set as non-zero.
*/
#define fence_to_wb_connector(x) container_of(x->lock, \
@@ -141,6 +165,38 @@ static int create_writeback_properties(struct drm_device
*dev)
dev->mode_config.writeback_out_fence_ptr_property = prop;
}
+ if (!dev->mode_config.prop_writeback_dest_x) {
+ prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
+ "WRITEBACK_DEST_X", 0,
UINT_MAX);
+ if (!prop)
+ return -ENOMEM;
+ dev->mode_config.prop_writeback_dest_x = prop;
+ }
+
+ if (!dev->mode_config.prop_writeback_dest_y) {
+ prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
+ "WRITEBACK_DEST_Y", 0,
UINT_MAX);
+ if (!prop)
+ return -ENOMEM;
+ dev->mode_config.prop_writeback_dest_y = prop;
+ }
+
+ if (!dev->mode_config.prop_writeback_dest_w) {
+ prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
+ "WRITEBACK_DEST_W", 0,
UINT_MAX);
+ if (!prop)
+ return -ENOMEM;
+ dev->mode_config.prop_writeback_dest_w = prop;
+ }
+
+ if (!dev->mode_config.prop_writeback_dest_h) {
+ prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
+ "WRITEBACK_DEST_H", 0,
UINT_MAX);
+ if (!prop)
+ return -ENOMEM;
+ dev->mode_config.prop_writeback_dest_h = prop;
+ }
+
return 0;
}
@@ -225,6 +281,16 @@ int drm_writeback_connector_init(struct drm_device *dev,
drm_object_attach_property(&connector->base,
config->writeback_pixel_formats_property,
blob->base.id);
+
+ drm_object_attach_property(&connector->base,
+ config->prop_writeback_dest_x, 0);
+ drm_object_attach_property(&connector->base,
+ config->prop_writeback_dest_y, 0);
+ drm_object_attach_property(&connector->base,
+ config->prop_writeback_dest_w, 0);
+ drm_object_attach_property(&connector->base,
+ config->prop_writeback_dest_h, 0);
+
wb_connector->pixel_formats_blob_ptr = blob;
return 0;
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 8fe22ab..4c7701e 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -515,6 +515,25 @@ struct drm_connector_state {
*/
struct drm_writeback_job *writeback_job;
+ /** @writeback_dest_x: x coord to write plane to on wb buffer
+ * The written back composition will be translated by this
+ * amount horizontally on the output buffer.
+ */
+ /** @writeback_dest_y: y coord to write plane to on wb buffer
+ * The written back composition will be translated by this
+ * amount vertically on the output buffer.
+ */
+ /** @writeback_dest_w: width of plane to write to wb buffer
+ * The written back composition will be scaled to match this
+ * height dimension on the output buffer. Ignored if 0.
+ */
+ /** @writeback_dest_h: height of plane to write to wb buffer
+ * The written back composition will be scaled to match this
+ * width dimension on the output buffer. Ignored if 0.
+ */
+ uint32_t writeback_dest_x, writeback_dest_y,
+ writeback_dest_w, writeback_dest_h;
+
/**
* @max_requested_bpc: Connector property to limit the maximum bit
* depth of the pixels.
@@ -704,6 +723,10 @@ struct drm_connector_funcs {
* cleaned up by calling the @atomic_destroy_state hook in this
* structure.
*
+ * State relating to writeback including writeback_job and
+ * writeback_dest_x,y,w,h is not intended to be reused and so will not
+ * be duplicated and will instead be reset to NULL/0 respectively.
+ *
* This callback is mandatory for atomic drivers.
*
* Atomic drivers which don't subclass &struct drm_connector_state
should use
diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h
index 7f60e8e..40ce4a8 100644
--- a/include/drm/drm_mode_config.h
+++ b/include/drm/drm_mode_config.h
@@ -622,6 +622,26 @@ struct drm_mode_config {
*/
struct drm_property *prop_crtc_h;
/**
+ * @prop_writeback_dest_x: Writeback connector property for the crtc
+ * output destination position in the writeback buffer.
+ */
+ struct drm_property *prop_writeback_dest_x;
+ /**
+ * @prop_writeback_dest_y: Writeback connector property for the crtc
+ * output destination position in the writeback buffer.
+ */
+ struct drm_property *prop_writeback_dest_y;
+ /**
+ * @prop_writeback_dest_w: Writeback connector property for the crtc
+ * output destination position in the writeback buffer.
+ */
+ struct drm_property *prop_writeback_dest_w;
+ /**
+ * @prop_writeback_dest_h: Writeback connector property for the crtc
+ * output destination position in the writeback buffer.
+ */
+ struct drm_property *prop_writeback_dest_h;
+ /**
* @prop_fb_id: Default atomic plane property to specify the
* &drm_framebuffer.
*/
--
2.7.4
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