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Commit 544f7377 authored by Jyri Sarha's avatar Jyri Sarha
Browse files

drm/tilcdc: Add support for drm panels 



Add support for drm panels to tilcdc. Adding the support on top of the
existing bridge support needs only couple of lines of code when using
using the drm panel bridge helpers.

Signed-off-by: default avatarJyri Sarha <jsarha@ti.com>
Reviewed-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
parent b225e742

drivers/gpu/drm/tilcdc/Kconfig

+2 −0
Original line number Diff line number Diff line
@@ -4,6 +4,8 @@ config DRM_TILCDC 
	select DRM_KMS_HELPER

	select DRM_KMS_CMA_HELPER

	select DRM_GEM_CMA_HELPER

	select DRM_BRIDGE

	select DRM_PANEL_BRIDGE

	select VIDEOMODE_HELPERS

	select BACKLIGHT_CLASS_DEVICE

	select BACKLIGHT_LCD_SUPPORT

drivers/gpu/drm/tilcdc/tilcdc_external.c

+20 −9
Original line number Diff line number Diff line
@@ -188,18 +188,16 @@ int tilcdc_attach_bridge(struct drm_device *ddev, struct drm_bridge *bridge) 
int tilcdc_attach_external_device(struct drm_device *ddev)

{

	struct tilcdc_drm_private *priv = ddev->dev_private;

	struct device_node *remote_node;

	struct drm_bridge *bridge;

	struct drm_panel *panel;

	int ret;



	remote_node = of_graph_get_remote_node(ddev->dev->of_node, 0, 0);

	if (!remote_node)

	ret = drm_of_find_panel_or_bridge(ddev->dev->of_node, 0, 0,

					  &panel, &bridge);

	if (ret == -ENODEV)

		return 0;



	bridge = of_drm_find_bridge(remote_node);

	of_node_put(remote_node);

	if (!bridge)

		return -EPROBE_DEFER;

	else if (ret)

		return ret;



	priv->external_encoder = devm_kzalloc(ddev->dev,

					      sizeof(*priv->external_encoder),
@@ -215,10 +213,23 @@ int tilcdc_attach_external_device(struct drm_device *ddev) 
		return ret;

	}



	if (panel) {

		bridge = devm_drm_panel_bridge_add(ddev->dev, panel,

						   DRM_MODE_CONNECTOR_DPI);

		if (IS_ERR(bridge)) {

			ret = PTR_ERR(bridge);

			goto err_encoder_cleanup;

		}

	}



	ret = tilcdc_attach_bridge(ddev, bridge);

	if (ret)

		drm_encoder_cleanup(priv->external_encoder);

		goto err_encoder_cleanup;



	return 0;



err_encoder_cleanup:

	drm_encoder_cleanup(priv->external_encoder);

	return ret;

}