From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S939373AbdD0Qgd (ORCPT ); Thu, 27 Apr 2017 12:36:33 -0400 Received: from anholt.net ([50.246.234.109]:34064 "EHLO anholt.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S938674AbdD0QgH (ORCPT ); Thu, 27 Apr 2017 12:36:07 -0400 From: Eric Anholt To: dri-devel@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org, Yannick Fertre , Eric Anholt Subject: [PATCH 1/2] drm/bridge: Refactor out the panel wrapper from the lvds-encoder bridge. Date: Thu, 27 Apr 2017 09:36:00 -0700 Message-Id: <20170427163601.7313-1-eric@anholt.net> X-Mailer: git-send-email 2.11.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Many DRM drivers have common code to make a stub connector implementation that wraps a drm_panel. By wrapping the panel in a DRM bridge, all of the connector code (including calls during encoder enable/disable) goes away. Signed-off-by: Eric Anholt --- Documentation/gpu/drm-kms-helpers.rst | 3 + drivers/gpu/drm/bridge/Kconfig | 11 +- drivers/gpu/drm/bridge/Makefile | 1 + drivers/gpu/drm/bridge/lvds-encoder.c | 158 ++++------------------------ drivers/gpu/drm/bridge/panel.c | 188 ++++++++++++++++++++++++++++++++++ include/drm/drm_bridge.h | 8 ++ 6 files changed, 228 insertions(+), 141 deletions(-) create mode 100644 drivers/gpu/drm/bridge/panel.c diff --git a/Documentation/gpu/drm-kms-helpers.rst b/Documentation/gpu/drm-kms-helpers.rst index c075aadd7078..60eb3b41702b 100644 --- a/Documentation/gpu/drm-kms-helpers.rst +++ b/Documentation/gpu/drm-kms-helpers.rst @@ -143,6 +143,9 @@ Bridge Helper Reference .. kernel-doc:: drivers/gpu/drm/drm_bridge.c :export: +.. kernel-doc:: drivers/gpu/drm/bridge/panel.c + :export: + .. _drm_panel_helper: Panel Helper Reference diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig index f6968d3b4b41..c4daca38743c 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -4,6 +4,14 @@ config DRM_BRIDGE help Bridge registration and lookup framework. +config DRM_PANEL_BRIDGE + def_bool y + depends on DRM_BRIDGE + select DRM_KMS_HELPER + select DRM_PANEL + help + DRM bridge wrapper of DRM panels + menu "Display Interface Bridges" depends on DRM && DRM_BRIDGE @@ -27,8 +35,7 @@ config DRM_DUMB_VGA_DAC config DRM_LVDS_ENCODER tristate "Transparent parallel to LVDS encoder support" depends on OF - select DRM_KMS_HELPER - select DRM_PANEL + select DRM_PANEL_BRIDGE help Support for transparent parallel to LVDS encoders that don't require any configuration. diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile index 3fe2226ee2f2..40a43750ad55 100644 --- a/drivers/gpu/drm/bridge/Makefile +++ b/drivers/gpu/drm/bridge/Makefile @@ -5,6 +5,7 @@ obj-$(CONFIG_DRM_DUMB_VGA_DAC) += dumb-vga-dac.o obj-$(CONFIG_DRM_LVDS_ENCODER) += lvds-encoder.o obj-$(CONFIG_DRM_MEGACHIPS_STDPXXXX_GE_B850V3_FW) += megachips-stdpxxxx-ge-b850v3-fw.o obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o +obj-$(CONFIG_DRM_PANEL_BRIDGE) += panel.o obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o obj-$(CONFIG_DRM_SIL_SII8620) += sil-sii8620.o obj-$(CONFIG_DRM_SII902X) += sii902x.o diff --git a/drivers/gpu/drm/bridge/lvds-encoder.c b/drivers/gpu/drm/bridge/lvds-encoder.c index f1f67a279426..04e1504c4d8f 100644 --- a/drivers/gpu/drm/bridge/lvds-encoder.c +++ b/drivers/gpu/drm/bridge/lvds-encoder.c @@ -8,144 +8,18 @@ */ #include -#include -#include -#include -#include -#include +#include #include #include -struct lvds_encoder { - struct device *dev; - - struct drm_bridge bridge; - struct drm_connector connector; - struct drm_panel *panel; -}; - -static inline struct lvds_encoder * -drm_bridge_to_lvds_encoder(struct drm_bridge *bridge) -{ - return container_of(bridge, struct lvds_encoder, bridge); -} - -static inline struct lvds_encoder * -drm_connector_to_lvds_encoder(struct drm_connector *connector) -{ - return container_of(connector, struct lvds_encoder, connector); -} - -static int lvds_connector_get_modes(struct drm_connector *connector) -{ - struct lvds_encoder *lvds = drm_connector_to_lvds_encoder(connector); - - return drm_panel_get_modes(lvds->panel); -} - -static const struct drm_connector_helper_funcs lvds_connector_helper_funcs = { - .get_modes = lvds_connector_get_modes, -}; - -static const struct drm_connector_funcs lvds_connector_funcs = { - .dpms = drm_atomic_helper_connector_dpms, - .reset = drm_atomic_helper_connector_reset, - .fill_modes = drm_helper_probe_single_connector_modes, - .destroy = drm_connector_cleanup, - .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, - .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, -}; - -static int lvds_encoder_attach(struct drm_bridge *bridge) -{ - struct lvds_encoder *lvds = drm_bridge_to_lvds_encoder(bridge); - struct drm_connector *connector = &lvds->connector; - int ret; - - if (!bridge->encoder) { - DRM_ERROR("Missing encoder\n"); - return -ENODEV; - } - - drm_connector_helper_add(connector, &lvds_connector_helper_funcs); - - ret = drm_connector_init(bridge->dev, connector, &lvds_connector_funcs, - DRM_MODE_CONNECTOR_LVDS); - if (ret) { - DRM_ERROR("Failed to initialize connector\n"); - return ret; - } - - drm_mode_connector_attach_encoder(&lvds->connector, bridge->encoder); - - ret = drm_panel_attach(lvds->panel, &lvds->connector); - if (ret < 0) - return ret; - - return 0; -} - -static void lvds_encoder_detach(struct drm_bridge *bridge) -{ - struct lvds_encoder *lvds = drm_bridge_to_lvds_encoder(bridge); - - drm_panel_detach(lvds->panel); -} - -static void lvds_encoder_pre_enable(struct drm_bridge *bridge) -{ - struct lvds_encoder *lvds = drm_bridge_to_lvds_encoder(bridge); - - drm_panel_prepare(lvds->panel); -} - -static void lvds_encoder_enable(struct drm_bridge *bridge) -{ - struct lvds_encoder *lvds = drm_bridge_to_lvds_encoder(bridge); - - drm_panel_enable(lvds->panel); -} - -static void lvds_encoder_disable(struct drm_bridge *bridge) -{ - struct lvds_encoder *lvds = drm_bridge_to_lvds_encoder(bridge); - - drm_panel_disable(lvds->panel); -} - -static void lvds_encoder_post_disable(struct drm_bridge *bridge) -{ - struct lvds_encoder *lvds = drm_bridge_to_lvds_encoder(bridge); - - drm_panel_unprepare(lvds->panel); -} - -static const struct drm_bridge_funcs lvds_encoder_bridge_funcs = { - .attach = lvds_encoder_attach, - .detach = lvds_encoder_detach, - .pre_enable = lvds_encoder_pre_enable, - .enable = lvds_encoder_enable, - .disable = lvds_encoder_disable, - .post_disable = lvds_encoder_post_disable, -}; - static int lvds_encoder_probe(struct platform_device *pdev) { - struct lvds_encoder *lvds; struct device_node *port; struct device_node *endpoint; - struct device_node *panel; - - lvds = devm_kzalloc(&pdev->dev, sizeof(*lvds), GFP_KERNEL); - if (!lvds) - return -ENOMEM; - - lvds->dev = &pdev->dev; - platform_set_drvdata(pdev, lvds); - - lvds->bridge.funcs = &lvds_encoder_bridge_funcs; - lvds->bridge.of_node = pdev->dev.of_node; + struct device_node *panel_node; + struct drm_panel *panel; + struct drm_bridge *bridge; /* Locate the panel DT node. */ port = of_graph_get_port_by_id(pdev->dev.of_node, 1); @@ -161,29 +35,35 @@ static int lvds_encoder_probe(struct platform_device *pdev) return -ENXIO; } - panel = of_graph_get_remote_port_parent(endpoint); + panel_node = of_graph_get_remote_port_parent(endpoint); of_node_put(endpoint); - if (!panel) { + if (!panel_node) { dev_dbg(&pdev->dev, "no remote endpoint for port 1\n"); return -ENXIO; } - lvds->panel = of_drm_find_panel(panel); - of_node_put(panel); - if (!lvds->panel) { + panel = of_drm_find_panel(panel_node); + of_node_put(panel_node); + if (!panel) { dev_dbg(&pdev->dev, "panel not found, deferring probe\n"); return -EPROBE_DEFER; } - /* Register the bridge. */ - return drm_bridge_add(&lvds->bridge); + bridge = drm_panel_bridge_add(&pdev->dev, panel, + DRM_MODE_CONNECTOR_LVDS); + if (IS_ERR(bridge)) + return PTR_ERR(bridge); + + platform_set_drvdata(pdev, bridge); + + return 0; } static int lvds_encoder_remove(struct platform_device *pdev) { - struct lvds_encoder *encoder = platform_get_drvdata(pdev); + struct drm_bridge *bridge = platform_get_drvdata(pdev); - drm_bridge_remove(&encoder->bridge); + drm_bridge_remove(bridge); return 0; } diff --git a/drivers/gpu/drm/bridge/panel.c b/drivers/gpu/drm/bridge/panel.c new file mode 100644 index 000000000000..2081245455c6 --- /dev/null +++ b/drivers/gpu/drm/bridge/panel.c @@ -0,0 +1,188 @@ +/* + * Copyright (C) 2016 Laurent Pinchart + * Copyright (C) 2017 Broadcom + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +struct panel_bridge { + struct drm_bridge bridge; + struct device *dev; + struct drm_connector connector; + struct drm_panel *panel; + u32 connector_type; +}; + +static inline struct panel_bridge * +drm_bridge_to_panel_bridge(struct drm_bridge *bridge) +{ + return container_of(bridge, struct panel_bridge, bridge); +} + +static inline struct panel_bridge * +drm_connector_to_panel_bridge(struct drm_connector *connector) +{ + return container_of(connector, struct panel_bridge, connector); +} + +static int panel_bridge_connector_get_modes(struct drm_connector *connector) +{ + struct panel_bridge *panel_bridge = + drm_connector_to_panel_bridge(connector); + + return drm_panel_get_modes(panel_bridge->panel); +} + +static const struct drm_connector_helper_funcs panel_bridge_connector_helper_funcs = { + .get_modes = panel_bridge_connector_get_modes, +}; + +static const struct drm_connector_funcs panel_bridge_connector_funcs = { + .dpms = drm_atomic_helper_connector_dpms, + .reset = drm_atomic_helper_connector_reset, + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = drm_connector_cleanup, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static int panel_bridge_attach(struct drm_bridge *bridge) +{ + struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge); + struct drm_connector *connector = &panel_bridge->connector; + int ret; + + if (!bridge->encoder) { + DRM_ERROR("Missing encoder\n"); + return -ENODEV; + } + + drm_connector_helper_add(connector, + &panel_bridge_connector_helper_funcs); + + ret = drm_connector_init(bridge->dev, connector, + &panel_bridge_connector_funcs, + panel_bridge->connector_type); + if (ret) { + DRM_ERROR("Failed to initialize connector\n"); + return ret; + } + + drm_mode_connector_attach_encoder(&panel_bridge->connector, + bridge->encoder); + + ret = drm_panel_attach(panel_bridge->panel, &panel_bridge->connector); + if (ret < 0) + return ret; + + return 0; +} + +static void panel_bridge_detach(struct drm_bridge *bridge) +{ + struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge); + + drm_panel_detach(panel_bridge->panel); +} + +static void panel_bridge_pre_enable(struct drm_bridge *bridge) +{ + struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge); + + drm_panel_prepare(panel_bridge->panel); +} + +static void panel_bridge_enable(struct drm_bridge *bridge) +{ + struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge); + + drm_panel_enable(panel_bridge->panel); +} + +static void panel_bridge_disable(struct drm_bridge *bridge) +{ + struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge); + + drm_panel_disable(panel_bridge->panel); +} + +static void panel_bridge_post_disable(struct drm_bridge *bridge) +{ + struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge); + + drm_panel_unprepare(panel_bridge->panel); +} + +static const struct drm_bridge_funcs panel_bridge_bridge_funcs = { + .attach = panel_bridge_attach, + .detach = panel_bridge_detach, + .pre_enable = panel_bridge_pre_enable, + .enable = panel_bridge_enable, + .disable = panel_bridge_disable, + .post_disable = panel_bridge_post_disable, +}; + +/** + * drm_panel_bridge_add - Creates a drm_bridge and drm_connector that + * just call the appropriate functions from drm_panel. + * + * @dev: The struct device of the panel device. This is used for + * registering the drm_bridge. + * @panel: The drm_panel being wrapped. Must be non-NULL. + * @connector_type: The DRM_MODE_CONNECTOR_* for the connector to be + * created. + * + * For drivers converting from directly using drm_panel: The expected + * usage pattern is that during either encoder module probe or DSI + * host attach, a drm_panel will be looked up through + * drm_of_find_panel_or_bridge(). drm_panel_bridge_add() is used to + * wrap that panel in the new bridge, and the result can then be + * passed to drm_bridge_attach(). The drm_panel_prepare() and related + * functions can be dropped from the encoder driver (they're now + * called by the KMS helpers before calling into the encoder), along + * with connector creation. + */ +struct drm_bridge *drm_panel_bridge_add(struct device *dev, + struct drm_panel *panel, + u32 connector_type) +{ + struct panel_bridge *panel_bridge = + devm_kzalloc(dev, sizeof(*panel_bridge), GFP_KERNEL); + int ret; + + if (!dev || !panel) + return ERR_PTR(EINVAL); + + panel_bridge->dev = dev; + panel_bridge->connector_type = connector_type; + panel_bridge->panel = panel; + + panel_bridge->bridge.funcs = &panel_bridge_bridge_funcs; + panel_bridge->bridge.of_node = dev->of_node; + + ret = drm_bridge_add(&panel_bridge->bridge); + if (ret) + return ERR_PTR(ret); + + return &panel_bridge->bridge; +} +EXPORT_SYMBOL(drm_panel_bridge_add); + +void drm_panel_bridge_remove(struct device *dev, struct drm_bridge *bridge) +{ + drm_bridge_remove(bridge); + devm_kfree(dev, bridge); +} +EXPORT_SYMBOL(drm_panel_bridge_remove); diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h index fdd82fcbf168..e08563ee0546 100644 --- a/include/drm/drm_bridge.h +++ b/include/drm/drm_bridge.h @@ -29,6 +29,7 @@ #include struct drm_bridge; +struct drm_panel; /** * struct drm_bridge_funcs - drm_bridge control functions @@ -221,4 +222,11 @@ void drm_bridge_mode_set(struct drm_bridge *bridge, void drm_bridge_pre_enable(struct drm_bridge *bridge); void drm_bridge_enable(struct drm_bridge *bridge); +#ifdef CONFIG_DRM_PANEL +struct drm_bridge *drm_panel_bridge_add(struct device *dev, + struct drm_panel *panel, + u32 connector_type); +void drm_panel_bridge_remove(struct device *dev, struct drm_bridge *bridge); +#endif + #endif -- 2.11.0