| Message ID | 20210322140152.101709-4-jagan@amarulasolutions.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm: sun4i: dsi: Convert drm bridge | expand |
Hi Jagan, Thank you for the patch. On Mon, Mar 22, 2021 at 07:31:51PM +0530, Jagan Teki wrote: > 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. It would be best if possible to move this patch before 2/4, to first convert to the bridge model, and then build on top of it. > Signed-off-by: Jagan Teki <jagan@amarulasolutions.com> > --- > Changes for v4: > - none > 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; The drm_encoder should be dropped from this driver, the encoder should be created by the main display driver. > 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);
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);
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 v4: - none 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(-)