Some Rockchip CRTCs, like rv1108, can directly output parallel and serial RGB data to panel or conversion chip, so we add this driver to probe encoder and connector.

Signed-off-by: Sandy Huang hjc@rock-chips.com Reviewed-by: Sean Paul seanpaul@chromium.org Reviewed-by: Mark Yao mark.yao@rock-chips.com --- Changes in v4: 1. add ROCKCHIP_RGB depend on DRM_ROCKCHIP and PINCTRL; 2. drm_connector_cleanup be gated on rgb->panel; Changes in v3: update for rgb-mode move to panel node. Changes in v2: 1. add error log when probe failed; 2. update name_to_output_mode() according to sean's suggest; 3. Fix uninitialized use of ret.

drivers/gpu/drm/rockchip/Kconfig | 11 + drivers/gpu/drm/rockchip/Makefile | 1 + drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 2 + drivers/gpu/drm/rockchip/rockchip_drm_drv.h | 1 + drivers/gpu/drm/rockchip/rockchip_rgb.c | 344 ++++++++++++++++++++++++++++ 5 files changed, 359 insertions(+) create mode 100644 drivers/gpu/drm/rockchip/rockchip_rgb.c

diff --git a/drivers/gpu/drm/rockchip/Kconfig b/drivers/gpu/drm/rockchip/Kconfig index 3c70c62..51b1570 100644 --- a/drivers/gpu/drm/rockchip/Kconfig +++ b/drivers/gpu/drm/rockchip/Kconfig @@ -8,6 +8,7 @@ config DRM_ROCKCHIP select DRM_ANALOGIX_DP if ROCKCHIP_ANALOGIX_DP select DRM_DW_HDMI if ROCKCHIP_DW_HDMI select DRM_MIPI_DSI if ROCKCHIP_DW_MIPI_DSI + select DRM_RGB if ROCKCHIP_RGB select SND_SOC_HDMI_CODEC if ROCKCHIP_CDN_DP && SND_SOC help Choose this option if you have a Rockchip soc chipset. @@ -66,4 +67,14 @@ config ROCKCHIP_LVDS Rockchip rk3288 SoC has LVDS TX Controller can be used, and it support LVDS, rgb, dual LVDS output mode. say Y to enable its driver. + +config ROCKCHIP_RGB + bool "Rockchip RGB support" + depends on DRM_ROCKCHIP + depends on PINCTRL + help + Choose this option to enable support for Rockchip RGB output. + Some Rockchip CRTCs, like rv1108, can directly output parallel + and serial RGB format to panel or connect to a conversion chip. + say Y to enable its driver. endif diff --git a/drivers/gpu/drm/rockchip/Makefile b/drivers/gpu/drm/rockchip/Makefile index a881d2c..f32a17f 100644 --- a/drivers/gpu/drm/rockchip/Makefile +++ b/drivers/gpu/drm/rockchip/Makefile @@ -13,5 +13,6 @@ rockchipdrm-$(CONFIG_ROCKCHIP_DW_HDMI) += dw_hdmi-rockchip.o rockchipdrm-$(CONFIG_ROCKCHIP_DW_MIPI_DSI) += dw-mipi-dsi.o rockchipdrm-$(CONFIG_ROCKCHIP_INNO_HDMI) += inno_hdmi.o rockchipdrm-$(CONFIG_ROCKCHIP_LVDS) += rockchip_lvds.o +rockchipdrm-$(CONFIG_ROCKCHIP_RGB) += rockchip_rgb.o

obj-$(CONFIG_DRM_ROCKCHIP) += rockchipdrm.o diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c index 76d63de..265597c 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c @@ -459,6 +459,8 @@ static int __init rockchip_drm_init(void) CONFIG_ROCKCHIP_LVDS); ADD_ROCKCHIP_SUB_DRIVER(rockchip_dp_driver, CONFIG_ROCKCHIP_ANALOGIX_DP); + ADD_ROCKCHIP_SUB_DRIVER(rockchip_rgb_driver, + CONFIG_ROCKCHIP_RGB); ADD_ROCKCHIP_SUB_DRIVER(cdn_dp_driver, CONFIG_ROCKCHIP_CDN_DP); ADD_ROCKCHIP_SUB_DRIVER(dw_hdmi_rockchip_pltfm_driver, CONFIG_ROCKCHIP_DW_HDMI); diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h index 498dfbc..6b0ec7e 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h @@ -70,5 +70,6 @@ extern struct platform_driver dw_mipi_dsi_driver; extern struct platform_driver inno_hdmi_driver; extern struct platform_driver rockchip_dp_driver; extern struct platform_driver rockchip_lvds_driver; +extern struct platform_driver rockchip_rgb_driver; extern struct platform_driver vop_platform_driver; #endif /* _ROCKCHIP_DRM_DRV_H_ */ diff --git a/drivers/gpu/drm/rockchip/rockchip_rgb.c b/drivers/gpu/drm/rockchip/rockchip_rgb.c new file mode 100644 index 0000000..1831897 --- /dev/null +++ b/drivers/gpu/drm/rockchip/rockchip_rgb.c @@ -0,0 +1,344 @@ +/* + * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd + * Author: + * Sandy Huang hjc@rock-chips.com + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <drm/drmP.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_dp_helper.h> +#include <drm/drm_panel.h> +#include <drm/drm_of.h> + +#include <linux/component.h> +#include <linux/of_graph.h> + +#include "rockchip_drm_drv.h" +#include "rockchip_drm_vop.h" + +#define connector_to_rgb(c) container_of(c, struct rockchip_rgb, connector) +#define encoder_to_rgb(c) container_of(c, struct rockchip_rgb, encoder) + +struct rockchip_rgb { + struct device *dev; + struct drm_device *drm_dev; + struct drm_panel *panel; + struct drm_bridge *bridge; + struct drm_connector connector; + struct drm_encoder encoder; + struct dev_pin_info *pins; + int output_mode; +}; + +static inline int name_to_output_mode(const char *s) +{ + static const struct { + const char *name; + int format; + } formats[] = { + { "p888", ROCKCHIP_OUT_MODE_P888 }, + { "p666", ROCKCHIP_OUT_MODE_P666 }, + { "p565", ROCKCHIP_OUT_MODE_P565 }, + { "s888", ROCKCHIP_OUT_MODE_S888 }, + { "s888_dummy", ROCKCHIP_OUT_MODE_S888_DUMMY } + }; + int i; + + for (i = 0; i < ARRAY_SIZE(formats); i++) + if (!strncmp(s, formats[i].name, strlen(formats[i].name))) + return formats[i].format; + + return -EINVAL; +} + +static const struct drm_connector_funcs rockchip_rgb_connector_funcs = { + .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 int rockchip_rgb_connector_get_modes(struct drm_connector *connector) +{ + struct rockchip_rgb *rgb = connector_to_rgb(connector); + struct drm_panel *panel = rgb->panel; + + return drm_panel_get_modes(panel); +} + +static const +struct drm_connector_helper_funcs rockchip_rgb_connector_helper_funcs = { + .get_modes = rockchip_rgb_connector_get_modes, +}; + +static void rockchip_rgb_encoder_enable(struct drm_encoder *encoder) +{ + struct rockchip_rgb *rgb = encoder_to_rgb(encoder); + + drm_panel_prepare(rgb->panel); + /* iomux to LCD data/sync mode */ + if (rgb->pins && !IS_ERR(rgb->pins->default_state)) + pinctrl_select_state(rgb->pins->p, rgb->pins->default_state); + + drm_panel_enable(rgb->panel); +} + +static void rockchip_rgb_encoder_disable(struct drm_encoder *encoder) +{ + struct rockchip_rgb *rgb = encoder_to_rgb(encoder); + + drm_panel_disable(rgb->panel); + drm_panel_unprepare(rgb->panel); +} + +static int +rockchip_rgb_encoder_atomic_check(struct drm_encoder *encoder, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state); + struct rockchip_rgb *rgb = encoder_to_rgb(encoder); + + s->output_mode = rgb->output_mode; + s->output_type = DRM_MODE_CONNECTOR_LVDS; + + return 0; +} + +static const +struct drm_encoder_helper_funcs rockchip_rgb_encoder_helper_funcs = { + .enable = rockchip_rgb_encoder_enable, + .disable = rockchip_rgb_encoder_disable, + .atomic_check = rockchip_rgb_encoder_atomic_check, +}; + +static const struct drm_encoder_funcs rockchip_rgb_encoder_funcs = { + .destroy = drm_encoder_cleanup, +}; + +static const struct of_device_id rockchip_rgb_dt_ids[] = { + { + .compatible = "rockchip,rv1108-rgb", + }, + {} +}; + +MODULE_DEVICE_TABLE(of, rockchip_rgb_dt_ids); + +static int rockchip_rgb_bind(struct device *dev, struct device *master, + void *data) +{ + struct rockchip_rgb *rgb = dev_get_drvdata(dev); + struct drm_device *drm_dev = data; + struct drm_encoder *encoder; + struct drm_connector *connector; + struct device_node *remote = NULL; + struct device_node *port, *endpoint; + u32 endpoint_id; + const char *name; + int ret = 0, child_count = 0; + + rgb->drm_dev = drm_dev; + port = of_graph_get_port_by_id(dev->of_node, 1); + if (!port) { + DRM_DEV_ERROR(dev, + "can't found port point, please init rgb panel port!\n"); + return -EINVAL; + } + for_each_child_of_node(port, endpoint) { + child_count++; + if (of_property_read_u32(endpoint, "reg", &endpoint_id)) + endpoint_id = 0; + ret = drm_of_find_panel_or_bridge(dev->of_node, 1, endpoint_id, + &rgb->panel, &rgb->bridge); + if (!ret) + break; + } + if (!child_count) { + DRM_DEV_ERROR(dev, "rgb port does not have any children\n"); + ret = -EINVAL; + goto err_put_port; + } else if (ret) { + DRM_DEV_ERROR(dev, "failed to find panel and bridge node\n"); + ret = -EPROBE_DEFER; + goto err_put_port; + } + if (rgb->panel) + remote = rgb->panel->dev->of_node; + else + remote = rgb->bridge->of_node; + if (of_property_read_string(remote, "rgb-mode", &name)) + /* default set it as output mode P888 */ + rgb->output_mode = ROCKCHIP_OUT_MODE_P888; + else + rgb->output_mode = name_to_output_mode(name); + if (rgb->output_mode < 0) { + DRM_DEV_ERROR(dev, "invalid rockchip,rgb-mode [%s]\n", name); + ret = rgb->output_mode; + goto err_put_remote; + } + + encoder = &rgb->encoder; + encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev, + dev->of_node); + + ret = drm_encoder_init(drm_dev, encoder, &rockchip_rgb_encoder_funcs, + DRM_MODE_ENCODER_NONE, NULL); + if (ret < 0) { + DRM_DEV_ERROR(drm_dev->dev, + "failed to initialize encoder: %d\n", ret); + goto err_put_remote; + } + + drm_encoder_helper_add(encoder, &rockchip_rgb_encoder_helper_funcs); + + if (rgb->panel) { + connector = &rgb->connector; + connector->dpms = DRM_MODE_DPMS_OFF; + ret = drm_connector_init(drm_dev, connector, + &rockchip_rgb_connector_funcs, + DRM_MODE_CONNECTOR_Unknown); + if (ret < 0) { + DRM_DEV_ERROR(drm_dev->dev, + "failed to initialize connector: %d\n", + ret); + goto err_free_encoder; + } + + drm_connector_helper_add(connector, + &rockchip_rgb_connector_helper_funcs); + + ret = drm_mode_connector_attach_encoder(connector, encoder); + if (ret < 0) { + DRM_DEV_ERROR(drm_dev->dev, + "failed to attach encoder: %d\n", ret); + goto err_free_connector; + } + + ret = drm_panel_attach(rgb->panel, connector); + if (ret < 0) { + DRM_DEV_ERROR(drm_dev->dev, + "failed to attach panel: %d\n", ret); + goto err_free_connector; + } + } else { + rgb->bridge->encoder = encoder; + ret = drm_bridge_attach(encoder, rgb->bridge, NULL); + if (ret) { + DRM_DEV_ERROR(drm_dev->dev, + "failed to attach bridge: %d\n", ret); + goto err_free_encoder; + } + encoder->bridge = rgb->bridge; + } + + of_node_put(remote); + of_node_put(port); + + return 0; + +err_free_connector: + drm_connector_cleanup(connector); +err_free_encoder: + drm_encoder_cleanup(encoder); +err_put_remote: + of_node_put(remote); +err_put_port: + of_node_put(port); + + return ret; +} + +static void rockchip_rgb_unbind(struct device *dev, struct device *master, + void *data) +{ + struct rockchip_rgb *rgb = dev_get_drvdata(dev); + + rockchip_rgb_encoder_disable(&rgb->encoder); + if (rgb->panel) { + drm_panel_detach(rgb->panel); + drm_connector_cleanup(&rgb->connector); + } + drm_encoder_cleanup(&rgb->encoder); +} + +static const struct component_ops rockchip_rgb_component_ops = { + .bind = rockchip_rgb_bind, + .unbind = rockchip_rgb_unbind, +}; + +static int rockchip_rgb_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct rockchip_rgb *rgb; + const struct of_device_id *match; + int ret; + + if (!dev->of_node) { + DRM_DEV_ERROR(dev, "dev->of_node is null\n"); + return -ENODEV; + } + + rgb = devm_kzalloc(&pdev->dev, sizeof(*rgb), GFP_KERNEL); + if (!rgb) + return -ENOMEM; + + rgb->dev = dev; + match = of_match_node(rockchip_rgb_dt_ids, dev->of_node); + if (!match) { + DRM_DEV_ERROR(dev, "match node failed\n"); + return -ENODEV; + } + + rgb->pins = devm_kzalloc(rgb->dev, sizeof(*rgb->pins), GFP_KERNEL); + if (!rgb->pins) + return -ENOMEM; + rgb->pins->p = devm_pinctrl_get(rgb->dev); + if (IS_ERR(rgb->pins->p)) { + DRM_DEV_ERROR(dev, "no pinctrl handle\n"); + devm_kfree(rgb->dev, rgb->pins); + rgb->pins = NULL; + } else { + rgb->pins->default_state = + pinctrl_lookup_state(rgb->pins->p, "lcdc"); + if (IS_ERR(rgb->pins->default_state)) { + DRM_DEV_ERROR(dev, "no default pinctrl state\n"); + devm_kfree(rgb->dev, rgb->pins); + rgb->pins = NULL; + } + } + + dev_set_drvdata(dev, rgb); + ret = component_add(&pdev->dev, &rockchip_rgb_component_ops); + if (ret < 0) + DRM_DEV_ERROR(dev, "failed to add component\n"); + + return ret; +} + +static int rockchip_rgb_remove(struct platform_device *pdev) +{ + component_del(&pdev->dev, &rockchip_rgb_component_ops); + + return 0; +} + +struct platform_driver rockchip_rgb_driver = { + .probe = rockchip_rgb_probe, + .remove = rockchip_rgb_remove, + .driver = { + .name = "rockchip-rgb", + .of_match_table = of_match_ptr(rockchip_rgb_dt_ids), + }, +};