Convert the encoder to bridge driver in order to standardize on a single API by supporting all varients of downstream bridge devices.
The drm_encoder can't be removed as it's exposed to userspace, so it then becomes a dumb encoder, without any operation implemented. Tested on DSI Panel, DSI Bridge, I2C-Configured DSI Bridge. Signed-off-by: Jagan Teki <ja...@amarulasolutions.com> --- Changes for v7: - drop bridge call chain - use drmm_of_dsi_get_bridge - switch to atomic bridge calls - use atomic_pre_enable and atomic_enable for previous enable Changes for v6: - support donwstream bridge - drop bridge conversion - devm_drm_of_get_bridge() require child lookup https://patchwork.kernel.org/project/dri-devel/cover/20211207054747.461029-1-ja...@amarulasolutions.com/ Changes for v5: - add atomic APIs - find host and device variant DSI devices. Changes for v4, v3: - none drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 143 ++++++++++--------------- drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h | 10 +- 2 files changed, 61 insertions(+), 92 deletions(-) diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c index 760ff05eabf4..71951a6dc914 100644 --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c @@ -20,8 +20,8 @@ #include <linux/slab.h> #include <drm/drm_atomic_helper.h> +#include <drm/drm_bridge.h> #include <drm/drm_mipi_dsi.h> -#include <drm/drm_panel.h> #include <drm/drm_print.h> #include <drm/drm_probe_helper.h> #include <drm/drm_simple_kms_helper.h> @@ -713,10 +713,11 @@ 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_pre_enable(struct drm_bridge *bridge, + struct drm_bridge_state *old_state) { - 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; @@ -768,9 +769,12 @@ static void sun6i_dsi_encoder_enable(struct drm_encoder *encoder) phy_set_mode(dsi->dphy, PHY_MODE_MIPI_DPHY); phy_configure(dsi->dphy, &opts); phy_power_on(dsi->dphy); +} - if (dsi->panel) - drm_panel_prepare(dsi->panel); +static void sun6i_dsi_bridge_enable(struct drm_bridge *bridge, + struct drm_bridge_state *old_state) +{ + struct sun6i_dsi *dsi = bridge_to_sun6i_dsi(bridge); /* * FIXME: This should be moved after the switch to HS mode. @@ -784,9 +788,6 @@ static void sun6i_dsi_encoder_enable(struct drm_encoder *encoder) * ordering on the panels I've tested it with, so I guess this * will do for now, until that IP is better understood. */ - if (dsi->panel) - drm_panel_enable(dsi->panel); - sun6i_dsi_start(dsi, DSI_START_HSC); udelay(1000); @@ -794,17 +795,13 @@ 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 drm_bridge_state *old_state) { - 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"); - if (dsi->panel) { - drm_panel_disable(dsi->panel); - drm_panel_unprepare(dsi->panel); - } - phy_power_off(dsi->dphy); phy_exit(dsi->dphy); @@ -813,38 +810,23 @@ static void sun6i_dsi_encoder_disable(struct drm_encoder *encoder) regulator_disable(dsi->regulator); } -static int sun6i_dsi_get_modes(struct drm_connector *connector) -{ - struct sun6i_dsi *dsi = connector_to_sun6i_dsi(connector); - - return drm_panel_get_modes(dsi->panel, connector); -} - -static const struct drm_connector_helper_funcs sun6i_dsi_connector_helper_funcs = { - .get_modes = sun6i_dsi_get_modes, -}; - -static enum drm_connector_status -sun6i_dsi_connector_detect(struct drm_connector *connector, bool force) +static int sun6i_dsi_bridge_attach(struct drm_bridge *bridge, + enum drm_bridge_attach_flags flags) { - struct sun6i_dsi *dsi = connector_to_sun6i_dsi(connector); + struct sun6i_dsi *dsi = bridge_to_sun6i_dsi(bridge); - return dsi->panel ? connector_status_connected : - connector_status_disconnected; + return drm_bridge_attach(bridge->encoder, dsi->out_bridge, + &dsi->bridge, flags); } -static const struct drm_connector_funcs sun6i_dsi_connector_funcs = { - .detect = sun6i_dsi_connector_detect, - .fill_modes = drm_helper_probe_single_connector_modes, - .destroy = drm_connector_cleanup, - .reset = drm_atomic_helper_connector_reset, - .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, - .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 const struct drm_bridge_funcs sun6i_mipi_dsi_bridge_funcs = { + .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, + .atomic_reset = drm_atomic_helper_bridge_reset, + .atomic_pre_enable = sun6i_dsi_bridge_pre_enable, + .atomic_enable = sun6i_dsi_bridge_enable, + .atomic_disable = sun6i_dsi_bridge_disable, + .attach = sun6i_dsi_bridge_attach, }; static u32 sun6i_dsi_dcs_build_pkt_hdr(struct sun6i_dsi *dsi, @@ -959,20 +941,27 @@ static int sun6i_dsi_dcs_read(struct sun6i_dsi *dsi, return 1; } +static const struct component_ops sun6i_dsi_ops; + static int sun6i_dsi_attach(struct mipi_dsi_host *host, struct mipi_dsi_device *device) { struct sun6i_dsi *dsi = host_to_sun6i_dsi(host); - struct drm_panel *panel = of_drm_find_panel(device->dev.of_node); + int ret; + + dsi->device = device; + + drm_bridge_add(&dsi->bridge); + + ret = component_add(dsi->dev, &sun6i_dsi_ops); + if (ret) { + dev_err(dsi->dev, "Couldn't register our component\n"); + return ret; + } - if (IS_ERR(panel)) - return PTR_ERR(panel); if (!dsi->drm || !dsi->drm->registered) return -EPROBE_DEFER; - dsi->panel = panel; - dsi->device = device; - drm_kms_helper_hotplug_event(dsi->drm); dev_info(host->dev, "Attached device %s\n", device->name); @@ -985,11 +974,10 @@ static int sun6i_dsi_detach(struct mipi_dsi_host *host, { struct sun6i_dsi *dsi = host_to_sun6i_dsi(host); - dsi->panel = NULL; + component_del(dsi->dev, &sun6i_dsi_ops); + drm_bridge_remove(&dsi->bridge); dsi->device = NULL; - drm_kms_helper_hotplug_event(dsi->drm); - return 0; } @@ -1054,8 +1042,13 @@ 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); + dsi->out_bridge = drmm_of_dsi_get_bridge(drm, dev->of_node, 0, 1); + if (IS_ERR(dsi->out_bridge)) { + ret = PTR_ERR(dsi->out_bridge); + DRM_DEV_ERROR(dsi->dev, "failed to find the bridge: %d\n", ret); + return ret; + } + ret = drm_simple_encoder_init(drm, &dsi->encoder, DRM_MODE_ENCODER_DSI); if (ret) { @@ -1064,39 +1057,19 @@ 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"); - goto err_cleanup_connector; + dev_err(dsi->dev, "Couldn't attach the DSI bridge\n"); + return ret; } - drm_connector_attach_encoder(&dsi->connector, &dsi->encoder); - dsi->drm = drm; return 0; - -err_cleanup_connector: - drm_encoder_cleanup(&dsi->encoder); - return ret; -} - -static void sun6i_dsi_unbind(struct device *dev, struct device *master, - void *data) -{ - struct sun6i_dsi *dsi = dev_get_drvdata(dev); - - dsi->drm = NULL; } static const struct component_ops sun6i_dsi_ops = { .bind = sun6i_dsi_bind, - .unbind = sun6i_dsi_unbind, }; static int sun6i_dsi_probe(struct platform_device *pdev) @@ -1175,22 +1148,19 @@ static int sun6i_dsi_probe(struct platform_device *pdev) goto err_unprotect_clk; } + dsi->bridge.funcs = &sun6i_mipi_dsi_bridge_funcs; + dsi->bridge.of_node = dev->of_node; + dsi->bridge.type = DRM_MODE_CONNECTOR_DSI; + dsi->bridge.enable_next_first = true; + ret = mipi_dsi_host_register(&dsi->host); if (ret) { dev_err(dev, "Couldn't register MIPI-DSI host\n"); goto err_unprotect_clk; } - ret = component_add(&pdev->dev, &sun6i_dsi_ops); - if (ret) { - dev_err(dev, "Couldn't register our component\n"); - goto err_remove_dsi_host; - } - return 0; -err_remove_dsi_host: - mipi_dsi_host_unregister(&dsi->host); err_unprotect_clk: if (dsi->variant->has_mod_clk && dsi->variant->set_mod_clk) clk_rate_exclusive_put(dsi->mod_clk); @@ -1205,7 +1175,6 @@ static int sun6i_dsi_remove(struct platform_device *pdev) struct device *dev = &pdev->dev; struct sun6i_dsi *dsi = dev_get_drvdata(dev); - component_del(&pdev->dev, &sun6i_dsi_ops); mipi_dsi_host_unregister(&dsi->host); if (dsi->variant->has_mod_clk && dsi->variant->set_mod_clk) 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 f1ddefe0f554..8b9263e0f4ef 100644 --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h @@ -21,9 +21,9 @@ struct sun6i_dsi_variant { }; struct sun6i_dsi { - struct drm_connector connector; struct drm_encoder encoder; struct mipi_dsi_host host; + struct drm_bridge bridge; struct clk *bus_clk; struct clk *mod_clk; @@ -35,7 +35,7 @@ struct sun6i_dsi { struct device *dev; struct mipi_dsi_device *device; struct drm_device *drm; - struct drm_panel *panel; + struct drm_bridge *out_bridge; const struct sun6i_dsi_variant *variant; }; @@ -45,10 +45,10 @@ 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 *connector_to_sun6i_dsi(struct drm_connector *connector) +static inline struct sun6i_dsi *bridge_to_sun6i_dsi(struct drm_bridge *bridge) { - return container_of(connector, struct sun6i_dsi, connector); -}; + return container_of(bridge, struct sun6i_dsi, bridge); +} static inline struct sun6i_dsi *encoder_to_sun6i_dsi(const struct drm_encoder *encoder) { -- 2.25.1
