In order to integrate with a chain of drm_bridge, the internal HDMI5 encoder has to expose the EDID read operation through the drm_bridge API. Register a bridge at initialisation time to do so.
For the time being make the next bridge in the chain optional as the HDMI output is still based on omap_dss_device. The create_connector argument to the bridge attach function is also ignored for the same reason. This will be changed later when removing the related omapdrm-specific display drivers.
Signed-off-by: Laurent Pinchart laurent.pinchart@ideasonboard.com --- drivers/gpu/drm/omapdrm/dss/hdmi5.c | 75 +++++++++++++++++++++++++++-- 1 file changed, 70 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/omapdrm/dss/hdmi5.c b/drivers/gpu/drm/omapdrm/dss/hdmi5.c index 2b02b0a11696..a895ed159981 100644 --- a/drivers/gpu/drm/omapdrm/dss/hdmi5.c +++ b/drivers/gpu/drm/omapdrm/dss/hdmi5.c @@ -388,8 +388,10 @@ static void hdmi_disconnect(struct omap_dss_device *src,
#define MAX_EDID 512
-static struct edid *hdmi_read_edid_data(struct hdmi_core_data *core) +static struct edid *hdmi_read_edid_data(struct omap_hdmi *hdmi, + struct drm_connector *connector) { + struct hdmi_core_data *core = &hdmi->core; int max_ext_blocks = 3; int r, n, i; u8 *edid; @@ -421,9 +423,12 @@ static struct edid *hdmi_read_edid_data(struct hdmi_core_data *core) return NULL; }
-static struct edid *hdmi_read_edid(struct omap_dss_device *dssdev) +static struct edid * +hdmi_do_read_edid(struct omap_hdmi *hdmi, + struct edid *(*read)(struct omap_hdmi *hdmi, + struct drm_connector *connector), + struct drm_connector *connector) { - struct omap_hdmi *hdmi = dssdev_to_hdmi(dssdev); struct edid *edid; bool need_enable; int idlemode; @@ -447,7 +452,7 @@ static struct edid *hdmi_read_edid(struct omap_dss_device *dssdev)
hdmi5_core_ddc_init(&hdmi->core);
- edid = hdmi_read_edid_data(&hdmi->core); + edid = read(hdmi, connector);
hdmi5_core_ddc_uninit(&hdmi->core);
@@ -462,6 +467,12 @@ static struct edid *hdmi_read_edid(struct omap_dss_device *dssdev) return (struct edid *)edid; }
+static struct edid *hdmi_read_edid(struct omap_dss_device *dssdev) +{ + return hdmi_do_read_edid(dssdev_to_hdmi(dssdev), hdmi_read_edid_data, + NULL); +} + static int hdmi_set_infoframe(struct omap_dss_device *dssdev, const struct hdmi_avi_infoframe *avi) { @@ -497,6 +508,56 @@ static const struct omap_dss_device_ops hdmi_ops = { }, };
+/* ----------------------------------------------------------------------------- + * DRM Bridge Operations + */ + +static int hdmi5_bridge_attach(struct drm_bridge *bridge, + enum drm_bridge_attach_flags flags) +{ + struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge); + + if (!hdmi->output.next_bridge) + return 0; + + return drm_bridge_attach(bridge->encoder, hdmi->output.next_bridge, + bridge, flags); +} + +static struct edid *hdmi5_bridge_read_edid(struct omap_hdmi *hdmi, + struct drm_connector *connector) +{ + return drm_do_get_edid(connector, hdmi5_core_ddc_read, &hdmi->core); +} + +static struct edid *hdmi5_bridge_get_edid(struct drm_bridge *bridge, + struct drm_connector *connector) +{ + struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge); + + return hdmi_do_read_edid(hdmi, hdmi5_bridge_read_edid, connector); +} + +static const struct drm_bridge_funcs hdmi5_bridge_funcs = { + .attach = hdmi5_bridge_attach, + .get_edid = hdmi5_bridge_get_edid, +}; + +static void hdmi5_bridge_init(struct omap_hdmi *hdmi) +{ + hdmi->bridge.funcs = &hdmi5_bridge_funcs; + hdmi->bridge.of_node = hdmi->pdev->dev.of_node; + hdmi->bridge.ops = DRM_BRIDGE_OP_EDID; + hdmi->bridge.type = DRM_MODE_CONNECTOR_HDMIA; + + drm_bridge_add(&hdmi->bridge); +} + +static void hdmi5_bridge_cleanup(struct omap_hdmi *hdmi) +{ + drm_bridge_remove(&hdmi->bridge); +} + /* ----------------------------------------------------------------------------- * Audio Callbacks */ @@ -679,6 +740,8 @@ static int hdmi5_init_output(struct omap_hdmi *hdmi) struct omap_dss_device *out = &hdmi->output; int r;
+ hdmi5_bridge_init(hdmi); + out->dev = &hdmi->pdev->dev; out->id = OMAP_DSS_OUTPUT_HDMI; out->type = OMAP_DISPLAY_TYPE_HDMI; @@ -689,7 +752,7 @@ static int hdmi5_init_output(struct omap_hdmi *hdmi) out->of_port = 0; out->ops_flags = OMAP_DSS_DEVICE_OP_EDID;
- r = omapdss_device_init_output(out, NULL); + r = omapdss_device_init_output(out, &hdmi->bridge); if (r < 0) return r;
@@ -704,6 +767,8 @@ static void hdmi5_uninit_output(struct omap_hdmi *hdmi)
omapdss_device_unregister(out); omapdss_device_cleanup_output(out); + + hdmi5_bridge_cleanup(hdmi); }
static int hdmi5_probe_of(struct omap_hdmi *hdmi)