add simple encoder for dsi bridge Signed-off-by: Keith Zhao <keith.zhao@xxxxxxxxxxxxxxxx> --- drivers/gpu/drm/verisilicon/Makefile | 4 +- drivers/gpu/drm/verisilicon/vs_drv.c | 2 + drivers/gpu/drm/verisilicon/vs_simple_enc.c | 195 ++++++++++++++++++++ drivers/gpu/drm/verisilicon/vs_simple_enc.h | 23 +++ 4 files changed, 223 insertions(+), 1 deletion(-) create mode 100644 drivers/gpu/drm/verisilicon/vs_simple_enc.c create mode 100644 drivers/gpu/drm/verisilicon/vs_simple_enc.h diff --git a/drivers/gpu/drm/verisilicon/Makefile b/drivers/gpu/drm/verisilicon/Makefile index 71fadafcee13..cd5d0a90bcfe 100644 --- a/drivers/gpu/drm/verisilicon/Makefile +++ b/drivers/gpu/drm/verisilicon/Makefile @@ -5,6 +5,8 @@ vs_drm-objs := vs_dc_hw.o \ vs_crtc.o \ vs_drv.o \ vs_modeset.o \ - vs_plane.o + vs_plane.o \ + vs_simple_enc.o + vs_drm-$(CONFIG_DRM_VERISILICON_STARFIVE_HDMI) += starfive_hdmi.o obj-$(CONFIG_DRM_VERISILICON) += vs_drm.o diff --git a/drivers/gpu/drm/verisilicon/vs_drv.c b/drivers/gpu/drm/verisilicon/vs_drv.c index d7e5199fe293..946f137ab124 100644 --- a/drivers/gpu/drm/verisilicon/vs_drv.c +++ b/drivers/gpu/drm/verisilicon/vs_drv.c @@ -23,6 +23,7 @@ #include "vs_drv.h" #include "vs_modeset.h" #include "vs_dc.h" +#include "vs_simple_enc.h" #define DRV_NAME "verisilicon" #define DRV_DESC "Verisilicon DRM driver" @@ -217,6 +218,7 @@ static struct platform_driver *drm_sub_drivers[] = { #ifdef CONFIG_DRM_VERISILICON_STARFIVE_HDMI &starfive_hdmi_driver, #endif + &simple_encoder_driver, }; static struct component_match *vs_drm_match_add(struct device *dev) diff --git a/drivers/gpu/drm/verisilicon/vs_simple_enc.c b/drivers/gpu/drm/verisilicon/vs_simple_enc.c new file mode 100644 index 000000000000..c5a8d82bc469 --- /dev/null +++ b/drivers/gpu/drm/verisilicon/vs_simple_enc.c @@ -0,0 +1,195 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2020 VeriSilicon Holdings Co., Ltd. + */ +#include <linux/component.h> +#include <linux/of_device.h> +#include <linux/module.h> + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_bridge.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_of.h> +#include <linux/regmap.h> +#include <linux/media-bus-format.h> +#include <linux/mfd/syscon.h> + +#include "vs_crtc.h" +#include "vs_simple_enc.h" + +static const struct simple_encoder_priv dsi_priv = { + .encoder_type = DRM_MODE_ENCODER_DSI +}; + +static inline struct simple_encoder *to_simple_encoder(struct drm_encoder *enc) +{ + return container_of(enc, struct simple_encoder, encoder); +} + +static int encoder_parse_dt(struct device *dev) +{ + struct simple_encoder *simple = dev_get_drvdata(dev); + unsigned int args[2]; + + simple->dss_regmap = syscon_regmap_lookup_by_phandle_args(dev->of_node, + "starfive,syscon", + 2, args); + + if (IS_ERR(simple->dss_regmap)) { + return dev_err_probe(dev, PTR_ERR(simple->dss_regmap), + "getting the regmap failed\n"); + } + + simple->offset = args[0]; + simple->mask = args[1]; + + return 0; +} + +void encoder_atomic_enable(struct drm_encoder *encoder, + struct drm_atomic_state *state) +{ + struct simple_encoder *simple = to_simple_encoder(encoder); + + regmap_update_bits(simple->dss_regmap, simple->offset, simple->mask, + simple->mask); +} + +int encoder_atomic_check(struct drm_encoder *encoder, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + struct vs_crtc_state *vs_crtc_state = to_vs_crtc_state(crtc_state); + struct drm_connector *connector = conn_state->connector; + int ret = 0; + + struct drm_bridge *first_bridge = drm_bridge_chain_get_first_bridge(encoder); + struct drm_bridge_state *bridge_state = ERR_PTR(-EINVAL); + + vs_crtc_state->encoder_type = encoder->encoder_type; + + if (first_bridge && first_bridge->funcs->atomic_duplicate_state) + bridge_state = drm_atomic_get_bridge_state(crtc_state->state, first_bridge); + + if (IS_ERR(bridge_state)) { + if (connector->display_info.num_bus_formats) + vs_crtc_state->output_fmt = connector->display_info.bus_formats[0]; + else + vs_crtc_state->output_fmt = MEDIA_BUS_FMT_FIXED; + } else { + vs_crtc_state->output_fmt = bridge_state->input_bus_cfg.format; + } + + switch (vs_crtc_state->output_fmt) { + case MEDIA_BUS_FMT_FIXED: + case MEDIA_BUS_FMT_RGB565_1X16: + case MEDIA_BUS_FMT_RGB666_1X18: + case MEDIA_BUS_FMT_RGB888_1X24: + case MEDIA_BUS_FMT_RGB666_1X24_CPADHI: + case MEDIA_BUS_FMT_RGB101010_1X30: + case MEDIA_BUS_FMT_UYYVYY8_0_5X24: + case MEDIA_BUS_FMT_UYVY8_1X16: + case MEDIA_BUS_FMT_YUV8_1X24: + case MEDIA_BUS_FMT_UYYVYY10_0_5X30: + case MEDIA_BUS_FMT_UYVY10_1X20: + case MEDIA_BUS_FMT_YUV10_1X30: + ret = 0; + break; + default: + ret = -EINVAL; + break; + } + + /* If MEDIA_BUS_FMT_FIXED, set it to default value */ + if (vs_crtc_state->output_fmt == MEDIA_BUS_FMT_FIXED) + vs_crtc_state->output_fmt = MEDIA_BUS_FMT_RGB888_1X24; + + return ret; +} + +static const struct drm_encoder_helper_funcs encoder_helper_funcs = { + .atomic_check = encoder_atomic_check, + .atomic_enable = encoder_atomic_enable, +}; + +static int encoder_bind(struct device *dev, struct device *master, void *data) +{ + struct drm_device *drm_dev = data; + struct simple_encoder *simple = dev_get_drvdata(dev); + struct drm_encoder *encoder; + struct drm_bridge *bridge; + int ret; + + encoder = &simple->encoder; + + ret = drmm_encoder_init(drm_dev, encoder, NULL, simple->priv->encoder_type, NULL); + if (ret) + return ret; + + drm_encoder_helper_add(encoder, &encoder_helper_funcs); + + encoder->possible_crtcs = + drm_of_find_possible_crtcs(drm_dev, dev->of_node); + + /* output port is port1*/ + bridge = devm_drm_of_get_bridge(dev, dev->of_node, 1, 0); + if (IS_ERR(bridge)) + return 0; + + return drm_bridge_attach(encoder, bridge, NULL, 0); +} + +static const struct component_ops encoder_component_ops = { + .bind = encoder_bind, +}; + +static const struct of_device_id simple_encoder_dt_match[] = { + { .compatible = "starfive,dsi-encoder", .data = &dsi_priv}, + {}, +}; +MODULE_DEVICE_TABLE(of, simple_encoder_dt_match); + +static int encoder_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct simple_encoder *simple; + int ret; + + simple = devm_kzalloc(dev, sizeof(*simple), GFP_KERNEL); + if (!simple) + return -ENOMEM; + + simple->priv = of_device_get_match_data(dev); + + simple->dev = dev; + + dev_set_drvdata(dev, simple); + + ret = encoder_parse_dt(dev); + if (ret) + return ret; + + return component_add(dev, &encoder_component_ops); +} + +static int encoder_remove(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + + component_del(dev, &encoder_component_ops); + dev_set_drvdata(dev, NULL); + + return 0; +} + +struct platform_driver simple_encoder_driver = { + .probe = encoder_probe, + .remove = encoder_remove, + .driver = { + .name = "vs-simple-encoder", + .of_match_table = of_match_ptr(simple_encoder_dt_match), + }, +}; + +MODULE_DESCRIPTION("Simple Encoder Driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/gpu/drm/verisilicon/vs_simple_enc.h b/drivers/gpu/drm/verisilicon/vs_simple_enc.h new file mode 100644 index 000000000000..fb33ca9e18d6 --- /dev/null +++ b/drivers/gpu/drm/verisilicon/vs_simple_enc.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2022 VeriSilicon Holdings Co., Ltd. + */ + +#ifndef __VS_SIMPLE_ENC_H_ +#define __VS_SIMPLE_ENC_H_ + +struct simple_encoder_priv { + unsigned char encoder_type; +}; + +struct simple_encoder { + struct drm_encoder encoder; + struct device *dev; + const struct simple_encoder_priv *priv; + struct regmap *dss_regmap; + unsigned int offset; + unsigned int mask; +}; + +extern struct platform_driver simple_encoder_driver; +#endif /* __VS_SIMPLE_ENC_H_ */ -- 2.34.1