From: Eric Anholt Date: Thu, 11 May 2017 18:31:23 +0000 (-0700) Subject: drm/vc4: Switch DSI to the panel-bridge layer, and support bridges. X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=656fa22f9ceabbae74ea4628dd02d297aa07104b;p=openwrt%2Fstaging%2Fblogic.git drm/vc4: Switch DSI to the panel-bridge layer, and support bridges. The newer version of the RPi panel driver is going to be a combination of a bridge and a panel, but we should also support panels without a bridge, so the panel-bridge layer lets us do that cleanly. v2: Drop "dev" argument. Signed-off-by: Eric Anholt Acked-by: Daniel Vetter Reviewed-by: Boris Brezillon Signed-off-by: Archit Taneja Link: http://patchwork.freedesktop.org/patch/msgid/20170511183128.25085-2-eric@anholt.net --- diff --git a/drivers/gpu/drm/vc4/Kconfig b/drivers/gpu/drm/vc4/Kconfig index b16aefe4a8d3..4361bdcfd28a 100644 --- a/drivers/gpu/drm/vc4/Kconfig +++ b/drivers/gpu/drm/vc4/Kconfig @@ -7,7 +7,7 @@ config DRM_VC4 select DRM_KMS_HELPER select DRM_KMS_CMA_HELPER select DRM_GEM_CMA_HELPER - select DRM_PANEL + select DRM_PANEL_BRIDGE select SND_PCM select SND_PCM_ELD select SND_SOC_GENERIC_DMAENGINE_PCM diff --git a/drivers/gpu/drm/vc4/vc4_dsi.c b/drivers/gpu/drm/vc4/vc4_dsi.c index 0ef41df3915f..5e8b81eaa168 100644 --- a/drivers/gpu/drm/vc4/vc4_dsi.c +++ b/drivers/gpu/drm/vc4/vc4_dsi.c @@ -503,8 +503,8 @@ struct vc4_dsi { struct mipi_dsi_host dsi_host; struct drm_encoder *encoder; - struct drm_connector *connector; - struct drm_panel *panel; + struct drm_bridge *bridge; + bool is_panel_bridge; void __iomem *regs; @@ -605,18 +605,6 @@ to_vc4_dsi_encoder(struct drm_encoder *encoder) return container_of(encoder, struct vc4_dsi_encoder, base.base); } -/* VC4 DSI connector KMS struct */ -struct vc4_dsi_connector { - struct drm_connector base; - struct vc4_dsi *dsi; -}; - -static inline struct vc4_dsi_connector * -to_vc4_dsi_connector(struct drm_connector *connector) -{ - return container_of(connector, struct vc4_dsi_connector, base); -} - #define DSI_REG(reg) { reg, #reg } static const struct { u32 reg; @@ -724,79 +712,6 @@ int vc4_dsi_debugfs_regs(struct seq_file *m, void *unused) } #endif -static enum drm_connector_status -vc4_dsi_connector_detect(struct drm_connector *connector, bool force) -{ - struct vc4_dsi_connector *vc4_connector = - to_vc4_dsi_connector(connector); - struct vc4_dsi *dsi = vc4_connector->dsi; - - if (dsi->panel) - return connector_status_connected; - else - return connector_status_disconnected; -} - -static void vc4_dsi_connector_destroy(struct drm_connector *connector) -{ - drm_connector_unregister(connector); - drm_connector_cleanup(connector); -} - -static int vc4_dsi_connector_get_modes(struct drm_connector *connector) -{ - struct vc4_dsi_connector *vc4_connector = - to_vc4_dsi_connector(connector); - struct vc4_dsi *dsi = vc4_connector->dsi; - - if (dsi->panel) - return drm_panel_get_modes(dsi->panel); - - return 0; -} - -static const struct drm_connector_funcs vc4_dsi_connector_funcs = { - .dpms = drm_atomic_helper_connector_dpms, - .detect = vc4_dsi_connector_detect, - .fill_modes = drm_helper_probe_single_connector_modes, - .destroy = vc4_dsi_connector_destroy, - .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_connector_helper_funcs vc4_dsi_connector_helper_funcs = { - .get_modes = vc4_dsi_connector_get_modes, -}; - -static struct drm_connector *vc4_dsi_connector_init(struct drm_device *dev, - struct vc4_dsi *dsi) -{ - struct drm_connector *connector; - struct vc4_dsi_connector *dsi_connector; - - dsi_connector = devm_kzalloc(dev->dev, sizeof(*dsi_connector), - GFP_KERNEL); - if (!dsi_connector) - return ERR_PTR(-ENOMEM); - - connector = &dsi_connector->base; - - dsi_connector->dsi = dsi; - - drm_connector_init(dev, connector, &vc4_dsi_connector_funcs, - DRM_MODE_CONNECTOR_DSI); - drm_connector_helper_add(connector, &vc4_dsi_connector_helper_funcs); - - connector->polled = 0; - connector->interlace_allowed = 0; - connector->doublescan_allowed = 0; - - drm_mode_connector_attach_encoder(connector, dsi->encoder); - - return connector; -} - static void vc4_dsi_encoder_destroy(struct drm_encoder *encoder) { drm_encoder_cleanup(encoder); @@ -894,12 +809,8 @@ static void vc4_dsi_encoder_disable(struct drm_encoder *encoder) struct vc4_dsi *dsi = vc4_encoder->dsi; struct device *dev = &dsi->pdev->dev; - drm_panel_disable(dsi->panel); - vc4_dsi_ulps(dsi, true); - drm_panel_unprepare(dsi->panel); - clk_disable_unprepare(dsi->pll_phy_clock); clk_disable_unprepare(dsi->escape_clock); clk_disable_unprepare(dsi->pixel_clock); @@ -984,12 +895,6 @@ static void vc4_dsi_encoder_enable(struct drm_encoder *encoder) return; } - ret = drm_panel_prepare(dsi->panel); - if (ret) { - DRM_ERROR("Panel failed to prepare\n"); - return; - } - if (debug_dump_regs) { DRM_INFO("DSI regs before:\n"); vc4_dsi_dump_regs(dsi); @@ -1211,13 +1116,6 @@ static void vc4_dsi_encoder_enable(struct drm_encoder *encoder) DRM_INFO("DSI regs after:\n"); vc4_dsi_dump_regs(dsi); } - - ret = drm_panel_enable(dsi->panel); - if (ret) { - DRM_ERROR("Panel failed to enable\n"); - drm_panel_unprepare(dsi->panel); - return; - } } static ssize_t vc4_dsi_host_transfer(struct mipi_dsi_host *host, @@ -1415,17 +1313,22 @@ static int vc4_dsi_host_attach(struct mipi_dsi_host *host, return 0; } - dsi->panel = of_drm_find_panel(device->dev.of_node); - if (!dsi->panel) - return 0; - - ret = drm_panel_attach(dsi->panel, dsi->connector); - if (ret != 0) - return ret; + dsi->bridge = of_drm_find_bridge(device->dev.of_node); + if (!dsi->bridge) { + struct drm_panel *panel = + of_drm_find_panel(device->dev.of_node); - drm_helper_hpd_irq_event(dsi->connector->dev); + dsi->bridge = drm_panel_bridge_add(panel, + DRM_MODE_CONNECTOR_DSI); + if (IS_ERR(dsi->bridge)) { + ret = PTR_ERR(dsi->bridge); + dsi->bridge = NULL; + return ret; + } + dsi->is_panel_bridge = true; + } - return 0; + return drm_bridge_attach(dsi->encoder, dsi->bridge, NULL); } static int vc4_dsi_host_detach(struct mipi_dsi_host *host, @@ -1433,15 +1336,9 @@ static int vc4_dsi_host_detach(struct mipi_dsi_host *host, { struct vc4_dsi *dsi = host_to_dsi(host); - if (dsi->panel) { - int ret = drm_panel_detach(dsi->panel); - - if (ret) - return ret; - - dsi->panel = NULL; - - drm_helper_hpd_irq_event(dsi->connector->dev); + if (dsi->is_panel_bridge) { + drm_panel_bridge_remove(dsi->bridge); + dsi->bridge = NULL; } return 0; @@ -1708,12 +1605,6 @@ static int vc4_dsi_bind(struct device *dev, struct device *master, void *data) DRM_MODE_ENCODER_DSI, NULL); drm_encoder_helper_add(dsi->encoder, &vc4_dsi_encoder_helper_funcs); - dsi->connector = vc4_dsi_connector_init(drm, dsi); - if (IS_ERR(dsi->connector)) { - ret = PTR_ERR(dsi->connector); - goto err_destroy_encoder; - } - dsi->dsi_host.ops = &vc4_dsi_host_ops; dsi->dsi_host.dev = dev; @@ -1724,11 +1615,6 @@ static int vc4_dsi_bind(struct device *dev, struct device *master, void *data) pm_runtime_enable(dev); return 0; - -err_destroy_encoder: - vc4_dsi_encoder_destroy(dsi->encoder); - - return ret; } static void vc4_dsi_unbind(struct device *dev, struct device *master, @@ -1740,7 +1626,7 @@ static void vc4_dsi_unbind(struct device *dev, struct device *master, pm_runtime_disable(dev); - vc4_dsi_connector_destroy(dsi->connector); + drm_bridge_remove(dsi->bridge); vc4_dsi_encoder_destroy(dsi->encoder); mipi_dsi_host_unregister(&dsi->dsi_host);