DRM bridge drivers have build-in handling of treating all display pipeline components as bridges.
So, convert the existing to a drm bridge driver with a built-in encoder support for compatibility with existing component drivers.
Signed-off-by: Jagan Teki jagan@amarulasolutions.com --- Changes for v3: - new patch
drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 75 ++++++++++++++++---------- drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h | 6 +++ 2 files changed, 54 insertions(+), 27 deletions(-)
diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c index 39321299dc27..6f3c5330a468 100644 --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c @@ -714,10 +714,10 @@ static int sun6i_dsi_start(struct sun6i_dsi *dsi, return 0; }
-static void sun6i_dsi_encoder_enable(struct drm_encoder *encoder) +static void sun6i_dsi_bridge_enable(struct drm_bridge *bridge) { - struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode; - struct sun6i_dsi *dsi = encoder_to_sun6i_dsi(encoder); + struct drm_display_mode *mode = &bridge->encoder->crtc->state->adjusted_mode; + struct sun6i_dsi *dsi = bridge_to_sun6i_dsi(bridge); struct mipi_dsi_device *device = dsi->device; union phy_configure_opts opts = { }; struct phy_configure_opts_mipi_dphy *cfg = &opts.mipi_dphy; @@ -801,9 +801,9 @@ static void sun6i_dsi_encoder_enable(struct drm_encoder *encoder) sun6i_dsi_start(dsi, DSI_START_HSD); }
-static void sun6i_dsi_encoder_disable(struct drm_encoder *encoder) +static void sun6i_dsi_bridge_disable(struct drm_bridge *bridge) { - struct sun6i_dsi *dsi = encoder_to_sun6i_dsi(encoder); + struct sun6i_dsi *dsi = bridge_to_sun6i_dsi(bridge);
DRM_DEBUG_DRIVER("Disabling DSI output\n");
@@ -852,9 +852,40 @@ static const struct drm_connector_funcs sun6i_dsi_connector_funcs = { .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, };
-static const struct drm_encoder_helper_funcs sun6i_dsi_enc_helper_funcs = { - .disable = sun6i_dsi_encoder_disable, - .enable = sun6i_dsi_encoder_enable, +static int sun6i_dsi_bridge_attach(struct drm_bridge *bridge, + enum drm_bridge_attach_flags flags) +{ + struct sun6i_dsi *dsi = bridge_to_sun6i_dsi(bridge); + int ret; + + if (dsi->panel_bridge) + return drm_bridge_attach(bridge->encoder, dsi->panel_bridge, NULL, 0); + + if (dsi->panel) { + drm_connector_helper_add(&dsi->connector, + &sun6i_dsi_connector_helper_funcs); + ret = drm_connector_init(bridge->dev, &dsi->connector, + &sun6i_dsi_connector_funcs, + DRM_MODE_CONNECTOR_DSI); + if (ret) { + dev_err(dsi->dev, "Couldn't initialise the DSI connector\n"); + goto err_cleanup_connector; + } + + drm_connector_attach_encoder(&dsi->connector, &dsi->encoder); + } + + return 0; + +err_cleanup_connector: + drm_encoder_cleanup(&dsi->encoder); + return ret; +} + +static const struct drm_bridge_funcs sun6i_dsi_bridge_funcs = { + .enable = sun6i_dsi_bridge_enable, + .disable = sun6i_dsi_bridge_disable, + .attach = sun6i_dsi_bridge_attach, };
static u32 sun6i_dsi_dcs_build_pkt_hdr(struct sun6i_dsi *dsi, @@ -1063,8 +1094,6 @@ static int sun6i_dsi_bind(struct device *dev, struct device *master, struct sun6i_dsi *dsi = dev_get_drvdata(dev); int ret;
- drm_encoder_helper_add(&dsi->encoder, - &sun6i_dsi_enc_helper_funcs); ret = drm_simple_encoder_init(drm, &dsi->encoder, DRM_MODE_ENCODER_DSI); if (ret) { @@ -1073,27 +1102,12 @@ static int sun6i_dsi_bind(struct device *dev, struct device *master, } dsi->encoder.possible_crtcs = BIT(0);
- drm_connector_helper_add(&dsi->connector, - &sun6i_dsi_connector_helper_funcs); - ret = drm_connector_init(drm, &dsi->connector, - &sun6i_dsi_connector_funcs, - DRM_MODE_CONNECTOR_DSI); + ret = drm_bridge_attach(&dsi->encoder, &dsi->bridge, NULL, 0); if (ret) { - dev_err(dsi->dev, - "Couldn't initialise the DSI connector\n"); + dev_err(dsi->dev, "Couldn't attach drm bridge\n"); goto err_cleanup_connector; }
- drm_connector_attach_encoder(&dsi->connector, &dsi->encoder); - - if (dsi->panel_bridge) { - ret = drm_bridge_attach(&dsi->encoder, dsi->panel_bridge, NULL, 0); - if (ret) { - dev_err(dsi->dev, "Couldn't attach drm bridge\n"); - goto err_cleanup_connector; - } - } - return 0;
err_cleanup_connector: @@ -1199,6 +1213,12 @@ static int sun6i_dsi_probe(struct platform_device *pdev) goto err_unprotect_clk; }
+ dsi->bridge.funcs = &sun6i_dsi_bridge_funcs; + dsi->bridge.of_node = dev->of_node; + dsi->bridge.type = DRM_MODE_CONNECTOR_DSI; + + drm_bridge_add(&dsi->bridge); + ret = component_add(&pdev->dev, &sun6i_dsi_ops); if (ret) { dev_err(dev, "Couldn't register our component\n"); @@ -1222,6 +1242,7 @@ static int sun6i_dsi_remove(struct platform_device *pdev) struct device *dev = &pdev->dev; struct sun6i_dsi *dsi = dev_get_drvdata(dev);
+ drm_bridge_remove(&dsi->bridge); component_del(&pdev->dev, &sun6i_dsi_ops); mipi_dsi_host_unregister(&dsi->host); clk_rate_exclusive_put(dsi->mod_clk); diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h index 370ecb356a63..5e70666089ad 100644 --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h @@ -16,6 +16,7 @@ #define SUN6I_DSI_TCON_DIV 4
struct sun6i_dsi { + struct drm_bridge bridge; struct drm_connector connector; struct drm_encoder encoder; struct mipi_dsi_host host; @@ -38,6 +39,11 @@ static inline struct sun6i_dsi *host_to_sun6i_dsi(struct mipi_dsi_host *host) return container_of(host, struct sun6i_dsi, host); };
+static inline struct sun6i_dsi *bridge_to_sun6i_dsi(struct drm_bridge *bridge) +{ + return container_of(bridge, struct sun6i_dsi, bridge); +} + static inline struct sun6i_dsi *connector_to_sun6i_dsi(struct drm_connector *connector) { return container_of(connector, struct sun6i_dsi, connector);