Re: [PATCH 2/3] drm/rockchip: Add support for Rockchip Soc RGB output interface

On Thu, Sep 14, 2017 at 11:43:23AM +0800, Sandy Huang wrote:

Like rockchip rv1108 crtc 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

drivers/gpu/drm/rockchip/Kconfig | 9 + 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 | 327 ++++++++++++++++++++++++++++ 5 files changed, 340 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 0c31f0a..ff1c781 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.

@@ -65,4 +66,12 @@ 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"
• help

•  Choose this option to enable support for Rockchip RGB output.
  

•  Like Rockchip rv1108 SoC CRTC can directly output parallel and
  

The wording here is a little awkward. Perhaps change to:

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 082c251..36e602a 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c @@ -449,6 +449,8 @@ 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..0f0e6b464 --- /dev/null +++ b/drivers/gpu/drm/rockchip/rockchip_rgb.c @@ -0,0 +1,327 @@ +/*

• • 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) +{

• if (strncmp(s, "p888", 4) == 0)

• return ROCKCHIP_OUT_MODE_P888;
  

• else if (strncmp(s, "p666", 4) == 0)

• return ROCKCHIP_OUT_MODE_P666;
  

• else if (strncmp(s, "p565", 4) == 0)

• return ROCKCHIP_OUT_MODE_P565;
  

• else if (strncmp(s, "s888", 4) == 0)

• return ROCKCHIP_OUT_MODE_S888;
  

• else if (strncmp(s, "s888_dummy", 10) == 0)

• return ROCKCHIP_OUT_MODE_S888_DUMMY;
  

Instead of hardcoding the string lengths, try:

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;

Yes, strlen isn't as performant, but this code only runs once and it's safer.

• 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;
• 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) {

• of_property_read_u32(endpoint, "reg", &endpoint_id);
  

• ret = drm_of_find_panel_or_bridge(dev->of_node, 1, endpoint_id,
  

• 				  &rgb->panel, &rgb->bridge);
  

• if (!ret)
  

• 	break;
  

• }
• 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(dev->of_node, "rockchip,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)

• 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)

• return -ENODEV;
  

• rgb->pins = devm_kzalloc(rgb->dev, sizeof(*rgb->pins), GFP_KERNEL);
• if (!rgb->pins)

• return -ENOMEM;
  

Can you please log errors for all of these failing conditions?

• 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),
  

• },

+};

2.7.4

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