Re: [PATCH 2/3] drm/rockchip: Add support for Rockchip Soc RGB output interface
From: Sandy Huang
Date: Tue Sep 19 2017 - 23:03:53 EST
Hi sean,
Thanks for your review.
在 2017/9/20 7:02, Sean Paul 写道:
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@xxxxxxxxxxxxxx>
---
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
...
ok, i will update at next version.
+ 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@xxxxxxxxxxxxxx>
+ *
+ * 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.
ok, i will update at next version.
+
+ 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?
ok, i will add error log for this return, except the devm_kzalloc error.
+ 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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