drm/omap: Merge omap_dss_device type and output_type fields

The omap_dss_device type and output_type fields differ mostly for
historical reasons. The output_type field is required for all devices
but the display at the end of the pipeline, and must be set to
OMAP_DISPLAY_TYPE_NONE for the latter. The type field is required for
all devices but the internal encoder, for which it is ignored.

The only reason why the output_type field must be set to
OMAP_DISPLAY_TYPE_NONE for the display at the end of the pipeline is to
identify omap_dss_device instances corresponding to displays. This is
not documented and confusing.

Clean the code by adding a new display field to the omap_dss_device
structure to identify displays, and merge the type and output_type
fields.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Tested-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

9 files changed, 17 insertions, 13 deletions

diff --git a/drivers/gpu/drm/omapdrm/dss/base.c b/drivers/gpu/drm/omapdrm/dss/base.c
index d14abde3c5f0..81ea0f55cd75 100644
--- a/drivers/gpu/drm/omapdrm/dss/base.c
+++ b/drivers/gpu/drm/omapdrm/dss/base.c
@@ -207,7 +207,7 @@ void omapdss_device_disconnect(struct omap_dss_device *src,
 	dev_dbg(dst->dev, "disconnect\n");
 
 	if (!dst->id && !omapdss_device_is_connected(dst)) {
-		WARN_ON(dst->output_type);
+		WARN_ON(!dst->display);
 		return;
 	}
 
diff --git a/drivers/gpu/drm/omapdrm/dss/dpi.c b/drivers/gpu/drm/omapdrm/dss/dpi.c
index 295bc3eeea80..cc78dfa07f04 100644
--- a/drivers/gpu/drm/omapdrm/dss/dpi.c
+++ b/drivers/gpu/drm/omapdrm/dss/dpi.c
@@ -634,7 +634,7 @@ static int dpi_init_output_port(struct dpi_data *dpi, struct device_node *port)
 
 	out->dev = &dpi->pdev->dev;
 	out->id = OMAP_DSS_OUTPUT_DPI;
-	out->output_type = OMAP_DISPLAY_TYPE_DPI;
+	out->type = OMAP_DISPLAY_TYPE_DPI;
 	out->dispc_channel = dpi_get_channel(dpi);
 	out->of_ports = BIT(port_num);
 	out->ops = &dpi_ops;
diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c
index 4ac325e664b5..2582b566e0b0 100644
--- a/drivers/gpu/drm/omapdrm/dss/dsi.c
+++ b/drivers/gpu/drm/omapdrm/dss/dsi.c
@@ -5121,7 +5121,7 @@ static int dsi_init_output(struct dsi_data *dsi)
 	out->id = dsi->module_id == 0 ?
 			OMAP_DSS_OUTPUT_DSI1 : OMAP_DSS_OUTPUT_DSI2;
 
-	out->output_type = OMAP_DISPLAY_TYPE_DSI;
+	out->type = OMAP_DISPLAY_TYPE_DSI;
 	out->name = dsi->module_id == 0 ? "dsi.0" : "dsi.1";
 	out->dispc_channel = dsi_get_channel(dsi);
 	out->ops = &dsi_ops;
diff --git a/drivers/gpu/drm/omapdrm/dss/hdmi4.c b/drivers/gpu/drm/omapdrm/dss/hdmi4.c
index 4337380b1bf7..6339e2756b34 100644
--- a/drivers/gpu/drm/omapdrm/dss/hdmi4.c
+++ b/drivers/gpu/drm/omapdrm/dss/hdmi4.c
@@ -679,7 +679,7 @@ static int hdmi4_init_output(struct omap_hdmi *hdmi)
 
 	out->dev = &hdmi->pdev->dev;
 	out->id = OMAP_DSS_OUTPUT_HDMI;
-	out->output_type = OMAP_DISPLAY_TYPE_HDMI;
+	out->type = OMAP_DISPLAY_TYPE_HDMI;
 	out->name = "hdmi.0";
 	out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
 	out->ops = &hdmi_ops;
diff --git a/drivers/gpu/drm/omapdrm/dss/hdmi5.c b/drivers/gpu/drm/omapdrm/dss/hdmi5.c
index b94f884c5c1a..2955bbad13bb 100644
--- a/drivers/gpu/drm/omapdrm/dss/hdmi5.c
+++ b/drivers/gpu/drm/omapdrm/dss/hdmi5.c
@@ -663,7 +663,7 @@ static int hdmi5_init_output(struct omap_hdmi *hdmi)
 
 	out->dev = &hdmi->pdev->dev;
 	out->id = OMAP_DSS_OUTPUT_HDMI;
-	out->output_type = OMAP_DISPLAY_TYPE_HDMI;
+	out->type = OMAP_DISPLAY_TYPE_HDMI;
 	out->name = "hdmi.0";
 	out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
 	out->ops = &hdmi_ops;
diff --git a/drivers/gpu/drm/omapdrm/dss/omapdss.h b/drivers/gpu/drm/omapdrm/dss/omapdss.h
index d13a6b5774e8..ab5467a1e92c 100644
--- a/drivers/gpu/drm/omapdrm/dss/omapdss.h
+++ b/drivers/gpu/drm/omapdrm/dss/omapdss.h
@@ -413,14 +413,18 @@ struct omap_dss_device {
 
 	struct list_head list;
 
+	/*
+	 * DSS type that this device generates (for DSS internal devices) or
+	 * requires (for external encoders, connectors and panels). Must be a
+	 * non-zero (different than OMAP_DISPLAY_TYPE_NONE) value.
+	 */
 	enum omap_display_type type;
+
 	/*
-	 * DSS output type that this device generates (for DSS internal devices)
-	 * or requires (for external encoders). Must be OMAP_DISPLAY_TYPE_NONE
-	 * for display devices (connectors and panels) and to non-zero value for
-	 * all other devices.
+	 * True if the device is a display (panel or connector) at the end of
+	 * the pipeline, false otherwise.
 	 */
-	enum omap_display_type output_type;
+	bool display;
 
 	const char *name;
 
diff --git a/drivers/gpu/drm/omapdrm/dss/output.c b/drivers/gpu/drm/omapdrm/dss/output.c
index 0ac400a521f3..f25ecfd26534 100644
--- a/drivers/gpu/drm/omapdrm/dss/output.c
+++ b/drivers/gpu/drm/omapdrm/dss/output.c
@@ -33,7 +33,7 @@ int omapdss_device_init_output(struct omap_dss_device *out)
 		return PTR_ERR(out->next);
 	}
 
-	if (out->next && out->output_type != out->next->type) {
+	if (out->next && out->type != out->next->type) {
 		dev_err(out->dev, "output type and display type don't match\n");
 		return -EINVAL;
 	}
diff --git a/drivers/gpu/drm/omapdrm/dss/sdi.c b/drivers/gpu/drm/omapdrm/dss/sdi.c
index 38b0bf19538d..e7945322c471 100644
--- a/drivers/gpu/drm/omapdrm/dss/sdi.c
+++ b/drivers/gpu/drm/omapdrm/dss/sdi.c
@@ -272,7 +272,7 @@ static int sdi_init_output(struct sdi_device *sdi)
 
 	out->dev = &sdi->pdev->dev;
 	out->id = OMAP_DSS_OUTPUT_SDI;
-	out->output_type = OMAP_DISPLAY_TYPE_SDI;
+	out->type = OMAP_DISPLAY_TYPE_SDI;
 	out->name = "sdi.0";
 	out->dispc_channel = OMAP_DSS_CHANNEL_LCD;
 	/* We have SDI only on OMAP3, where it's on port 1 */
diff --git a/drivers/gpu/drm/omapdrm/dss/venc.c b/drivers/gpu/drm/omapdrm/dss/venc.c
index f2cbecfd05b5..da43b865d973 100644
--- a/drivers/gpu/drm/omapdrm/dss/venc.c
+++ b/drivers/gpu/drm/omapdrm/dss/venc.c
@@ -760,7 +760,7 @@ static int venc_init_output(struct venc_device *venc)
 
 	out->dev = &venc->pdev->dev;
 	out->id = OMAP_DSS_OUTPUT_VENC;
-	out->output_type = OMAP_DISPLAY_TYPE_VENC;
+	out->type = OMAP_DISPLAY_TYPE_VENC;
 	out->name = "venc.0";
 	out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
 	out->ops = &venc_ops;