drm/omap: Add a dss device operation flag for .get_modes()

Instead of manually iterating over the dss devices in the pipeline to
find the first one that implements the .get_modes() operation, add a new
operation flag for .get_modes() and use the omap_connector_find_device()
helper function to locate the right dss device.

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>

11 files changed, 16 insertions, 5 deletions

diff --git a/drivers/gpu/drm/omapdrm/displays/panel-dpi.c b/drivers/gpu/drm/omapdrm/displays/panel-dpi.c
index d6a584292e91..897b8820e000 100644
--- a/drivers/gpu/drm/omapdrm/displays/panel-dpi.c
+++ b/drivers/gpu/drm/omapdrm/displays/panel-dpi.c
@@ -152,6 +152,7 @@ static int panel_dpi_probe(struct platform_device *pdev)
         dssdev->type = OMAP_DISPLAY_TYPE_DPI;
         dssdev->owner = THIS_MODULE;
         dssdev->of_ports = BIT(0);
+        dssdev->ops_flags = OMAP_DSS_DEVICE_OP_MODES;
         drm_bus_flags_from_videomode(&ddata->vm, &dssdev->bus_flags);
 
         omapdss_display_init(dssdev);
diff --git a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
index c5f570106a17..fe9d9f847d2e 100644
--- a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
+++ b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
@@ -1271,6 +1271,7 @@ static int dsicm_probe(struct platform_device *pdev)
         dssdev->type = OMAP_DISPLAY_TYPE_DSI;
         dssdev->owner = THIS_MODULE;
         dssdev->of_ports = BIT(0);
+        dssdev->ops_flags = OMAP_DSS_DEVICE_OP_MODES;
 
         dssdev->caps = OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE |
                 OMAP_DSS_DISPLAY_CAP_TEAR_ELIM;
diff --git a/drivers/gpu/drm/omapdrm/displays/panel-lgphilips-lb035q02.c b/drivers/gpu/drm/omapdrm/displays/panel-lgphilips-lb035q02.c
index e05b7f80416e..f37931bf1c5f 100644
--- a/drivers/gpu/drm/omapdrm/displays/panel-lgphilips-lb035q02.c
+++ b/drivers/gpu/drm/omapdrm/displays/panel-lgphilips-lb035q02.c
@@ -199,6 +199,7 @@ static int lb035q02_panel_spi_probe(struct spi_device *spi)
         dssdev->type = OMAP_DISPLAY_TYPE_DPI;
         dssdev->owner = THIS_MODULE;
         dssdev->of_ports = BIT(0);
+        dssdev->ops_flags = OMAP_DSS_DEVICE_OP_MODES;
 
         /*
          * Note: According to the panel documentation:
diff --git a/drivers/gpu/drm/omapdrm/displays/panel-nec-nl8048hl11.c b/drivers/gpu/drm/omapdrm/displays/panel-nec-nl8048hl11.c
index cf2127837e67..8f2fb3d0492f 100644
--- a/drivers/gpu/drm/omapdrm/displays/panel-nec-nl8048hl11.c
+++ b/drivers/gpu/drm/omapdrm/displays/panel-nec-nl8048hl11.c
@@ -194,6 +194,7 @@ static int nec_8048_probe(struct spi_device *spi)
         dssdev->type = OMAP_DISPLAY_TYPE_DPI;
         dssdev->owner = THIS_MODULE;
         dssdev->of_ports = BIT(0);
+        dssdev->ops_flags = OMAP_DSS_DEVICE_OP_MODES;
         dssdev->bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_SYNC_POSEDGE
                           | DRM_BUS_FLAG_PIXDATA_POSEDGE;
 
diff --git a/drivers/gpu/drm/omapdrm/displays/panel-sharp-ls037v7dw01.c b/drivers/gpu/drm/omapdrm/displays/panel-sharp-ls037v7dw01.c
index 30320cee1e56..8d5d7f775b55 100644
--- a/drivers/gpu/drm/omapdrm/displays/panel-sharp-ls037v7dw01.c
+++ b/drivers/gpu/drm/omapdrm/displays/panel-sharp-ls037v7dw01.c
@@ -209,6 +209,7 @@ static int sharp_ls_probe(struct platform_device *pdev)
         dssdev->type = OMAP_DISPLAY_TYPE_DPI;
         dssdev->owner = THIS_MODULE;
         dssdev->of_ports = BIT(0);
+        dssdev->ops_flags = OMAP_DSS_DEVICE_OP_MODES;
 
         /*
          * Note: According to the panel documentation:
diff --git a/drivers/gpu/drm/omapdrm/displays/panel-sony-acx565akm.c b/drivers/gpu/drm/omapdrm/displays/panel-sony-acx565akm.c
index 8debe77f92ff..b8360cef3754 100644
--- a/drivers/gpu/drm/omapdrm/displays/panel-sony-acx565akm.c
+++ b/drivers/gpu/drm/omapdrm/displays/panel-sony-acx565akm.c
@@ -708,6 +708,7 @@ static int acx565akm_probe(struct spi_device *spi)
         dssdev->type = OMAP_DISPLAY_TYPE_SDI;
         dssdev->owner = THIS_MODULE;
         dssdev->of_ports = BIT(0);
+        dssdev->ops_flags = OMAP_DSS_DEVICE_OP_MODES;
         dssdev->bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_SYNC_NEGEDGE
                           | DRM_BUS_FLAG_PIXDATA_POSEDGE;
 
diff --git a/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c b/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c
index c8b15f19a166..721c5bb3bdef 100644
--- a/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c
+++ b/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c
@@ -323,6 +323,7 @@ static int td028ttec1_panel_probe(struct spi_device *spi)
         dssdev->type = OMAP_DISPLAY_TYPE_DPI;
         dssdev->owner = THIS_MODULE;
         dssdev->of_ports = BIT(0);
+        dssdev->ops_flags = OMAP_DSS_DEVICE_OP_MODES;
 
         /*
          * Note: According to the panel documentation:
diff --git a/drivers/gpu/drm/omapdrm/displays/panel-tpo-td043mtea1.c b/drivers/gpu/drm/omapdrm/displays/panel-tpo-td043mtea1.c
index 9ecc4c7bee67..50960018dbe8 100644
--- a/drivers/gpu/drm/omapdrm/displays/panel-tpo-td043mtea1.c
+++ b/drivers/gpu/drm/omapdrm/displays/panel-tpo-td043mtea1.c
@@ -422,6 +422,7 @@ static int tpo_td043_probe(struct spi_device *spi)
         dssdev->type = OMAP_DISPLAY_TYPE_DPI;
         dssdev->owner = THIS_MODULE;
         dssdev->of_ports = BIT(0);
+        dssdev->ops_flags = OMAP_DSS_DEVICE_OP_MODES;
 
         /*
          * Note: According to the panel documentation:
diff --git a/drivers/gpu/drm/omapdrm/dss/omapdss.h b/drivers/gpu/drm/omapdrm/dss/omapdss.h
index 7637fc041b71..01da7e94b974 100644
--- a/drivers/gpu/drm/omapdrm/dss/omapdss.h
+++ b/drivers/gpu/drm/omapdrm/dss/omapdss.h
@@ -393,12 +393,14 @@ struct omap_dss_device_ops {
  * enum omap_dss_device_ops_flag - Indicates which device ops are supported
  * @OMAP_DSS_DEVICE_OP_DETECT: The device supports output connection detection
  * @OMAP_DSS_DEVICE_OP_HPD: The device supports all hot-plug-related operations
- * @OMAP_DSS_DEVICE_OP_EDID: The device supports readind EDID
+ * @OMAP_DSS_DEVICE_OP_EDID: The device supports reading EDID
+ * @OMAP_DSS_DEVICE_OP_MODES: The device supports reading modes
  */
 enum omap_dss_device_ops_flag {
         OMAP_DSS_DEVICE_OP_DETECT = BIT(0),
         OMAP_DSS_DEVICE_OP_HPD = BIT(1),
         OMAP_DSS_DEVICE_OP_EDID = BIT(2),
+        OMAP_DSS_DEVICE_OP_MODES = BIT(3),
 };
 
 struct omap_dss_device {
diff --git a/drivers/gpu/drm/omapdrm/dss/venc.c b/drivers/gpu/drm/omapdrm/dss/venc.c
index cefefe6d6fcb..f1abb4195a76 100644
--- a/drivers/gpu/drm/omapdrm/dss/venc.c
+++ b/drivers/gpu/drm/omapdrm/dss/venc.c
@@ -755,6 +755,7 @@ static int venc_init_output(struct venc_device *venc)
         out->ops = &venc_ops;
         out->owner = THIS_MODULE;
         out->of_ports = BIT(0);
+        out->ops_flags = OMAP_DSS_DEVICE_OP_MODES;
 
         r = omapdss_device_init_output(out);
         if (r < 0)
diff --git a/drivers/gpu/drm/omapdrm/omap_connector.c b/drivers/gpu/drm/omapdrm/omap_connector.c
index c0157554c12f..dc4533c8cbb4 100644
--- a/drivers/gpu/drm/omapdrm/omap_connector.c
+++ b/drivers/gpu/drm/omapdrm/omap_connector.c
@@ -228,10 +228,10 @@ static int omap_connector_get_modes(struct drm_connector *connector)
          * Otherwise if the display pipeline reports modes (e.g. with a fixed
          * resolution panel or an analog TV output), query it.
          */
-        for (dssdev = omap_connector->display; dssdev; dssdev = dssdev->src) {
-                if (dssdev->ops->get_modes)
-                        return dssdev->ops->get_modes(dssdev, connector);
-        }
+        dssdev = omap_connector_find_device(connector,
+                                            OMAP_DSS_DEVICE_OP_MODES);
+        if (dssdev)
+                return dssdev->ops->get_modes(dssdev, connector);
 
         /*
          * We can't retrieve modes, which can happen for instance for a DVI or