| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Boris Brezillon | 1640 | 70.45% | 1 | 16.67% |
| Fabrizio Castro | 683 | 29.34% | 1 | 16.67% |
| Shashank Sharma | 2 | 0.09% | 1 | 16.67% |
| Daniel Vetter | 1 | 0.04% | 1 | 16.67% |
| Liu Ying | 1 | 0.04% | 1 | 16.67% |
| Linus Walleij | 1 | 0.04% | 1 | 16.67% |
| Total | 2328 | 6 |
/* * Copyright (C) 2018 Renesas Electronics * * Copyright (C) 2016 Atmel * Bo Shen <voice.shen@atmel.com> * * Authors: Bo Shen <voice.shen@atmel.com> * Boris Brezillon <boris.brezillon@free-electrons.com> * Wu, Songjun <Songjun.Wu@atmel.com> * * * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved. * * 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. * * 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 <linux/gpio/consumer.h> #include <linux/i2c-mux.h> #include <linux/i2c.h> #include <linux/module.h> #include <linux/regmap.h> #include <drm/drmP.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_crtc_helper.h> #include <drm/drm_edid.h> #define SII902X_TPI_VIDEO_DATA 0x0 #define SII902X_TPI_PIXEL_REPETITION 0x8 #define SII902X_TPI_AVI_PIXEL_REP_BUS_24BIT BIT(5) #define SII902X_TPI_AVI_PIXEL_REP_RISING_EDGE BIT(4) #define SII902X_TPI_AVI_PIXEL_REP_4X 3 #define SII902X_TPI_AVI_PIXEL_REP_2X 1 #define SII902X_TPI_AVI_PIXEL_REP_NONE 0 #define SII902X_TPI_CLK_RATIO_HALF (0 << 6) #define SII902X_TPI_CLK_RATIO_1X (1 << 6) #define SII902X_TPI_CLK_RATIO_2X (2 << 6) #define SII902X_TPI_CLK_RATIO_4X (3 << 6) #define SII902X_TPI_AVI_IN_FORMAT 0x9 #define SII902X_TPI_AVI_INPUT_BITMODE_12BIT BIT(7) #define SII902X_TPI_AVI_INPUT_DITHER BIT(6) #define SII902X_TPI_AVI_INPUT_RANGE_LIMITED (2 << 2) #define SII902X_TPI_AVI_INPUT_RANGE_FULL (1 << 2) #define SII902X_TPI_AVI_INPUT_RANGE_AUTO (0 << 2) #define SII902X_TPI_AVI_INPUT_COLORSPACE_BLACK (3 << 0) #define SII902X_TPI_AVI_INPUT_COLORSPACE_YUV422 (2 << 0) #define SII902X_TPI_AVI_INPUT_COLORSPACE_YUV444 (1 << 0) #define SII902X_TPI_AVI_INPUT_COLORSPACE_RGB (0 << 0) #define SII902X_TPI_AVI_INFOFRAME 0x0c #define SII902X_SYS_CTRL_DATA 0x1a #define SII902X_SYS_CTRL_PWR_DWN BIT(4) #define SII902X_SYS_CTRL_AV_MUTE BIT(3) #define SII902X_SYS_CTRL_DDC_BUS_REQ BIT(2) #define SII902X_SYS_CTRL_DDC_BUS_GRTD BIT(1) #define SII902X_SYS_CTRL_OUTPUT_MODE BIT(0) #define SII902X_SYS_CTRL_OUTPUT_HDMI 1 #define SII902X_SYS_CTRL_OUTPUT_DVI 0 #define SII902X_REG_CHIPID(n) (0x1b + (n)) #define SII902X_PWR_STATE_CTRL 0x1e #define SII902X_AVI_POWER_STATE_MSK GENMASK(1, 0) #define SII902X_AVI_POWER_STATE_D(l) ((l) & SII902X_AVI_POWER_STATE_MSK) #define SII902X_INT_ENABLE 0x3c #define SII902X_INT_STATUS 0x3d #define SII902X_HOTPLUG_EVENT BIT(0) #define SII902X_PLUGGED_STATUS BIT(2) #define SII902X_REG_TPI_RQB 0xc7 #define SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS 500 struct sii902x { struct i2c_client *i2c; struct regmap *regmap; struct drm_bridge bridge; struct drm_connector connector; struct gpio_desc *reset_gpio; struct i2c_mux_core *i2cmux; }; static int sii902x_read_unlocked(struct i2c_client *i2c, u8 reg, u8 *val) { union i2c_smbus_data data; int ret; ret = __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags, I2C_SMBUS_READ, reg, I2C_SMBUS_BYTE_DATA, &data); if (ret < 0) return ret; *val = data.byte; return 0; } static int sii902x_write_unlocked(struct i2c_client *i2c, u8 reg, u8 val) { union i2c_smbus_data data; data.byte = val; return __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags, I2C_SMBUS_WRITE, reg, I2C_SMBUS_BYTE_DATA, &data); } static int sii902x_update_bits_unlocked(struct i2c_client *i2c, u8 reg, u8 mask, u8 val) { int ret; u8 status; ret = sii902x_read_unlocked(i2c, reg, &status); if (ret) return ret; status &= ~mask; status |= val & mask; return sii902x_write_unlocked(i2c, reg, status); } static inline struct sii902x *bridge_to_sii902x(struct drm_bridge *bridge) { return container_of(bridge, struct sii902x, bridge); } static inline struct sii902x *connector_to_sii902x(struct drm_connector *con) { return container_of(con, struct sii902x, connector); } static void sii902x_reset(struct sii902x *sii902x) { if (!sii902x->reset_gpio) return; gpiod_set_value(sii902x->reset_gpio, 1); /* The datasheet says treset-min = 100us. Make it 150us to be sure. */ usleep_range(150, 200); gpiod_set_value(sii902x->reset_gpio, 0); } static enum drm_connector_status sii902x_connector_detect(struct drm_connector *connector, bool force) { struct sii902x *sii902x = connector_to_sii902x(connector); unsigned int status; regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status); return (status & SII902X_PLUGGED_STATUS) ? connector_status_connected : connector_status_disconnected; } static const struct drm_connector_funcs sii902x_connector_funcs = { .detect = sii902x_connector_detect, .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 sii902x_get_modes(struct drm_connector *connector) { struct sii902x *sii902x = connector_to_sii902x(connector); u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24; struct edid *edid; int num = 0, ret; edid = drm_get_edid(connector, sii902x->i2cmux->adapter[0]); drm_connector_update_edid_property(connector, edid); if (edid) { num = drm_add_edid_modes(connector, edid); kfree(edid); } ret = drm_display_info_set_bus_formats(&connector->display_info, &bus_format, 1); if (ret) return ret; return num; } static enum drm_mode_status sii902x_mode_valid(struct drm_connector *connector, struct drm_display_mode *mode) { /* TODO: check mode */ return MODE_OK; } static const struct drm_connector_helper_funcs sii902x_connector_helper_funcs = { .get_modes = sii902x_get_modes, .mode_valid = sii902x_mode_valid, }; static void sii902x_bridge_disable(struct drm_bridge *bridge) { struct sii902x *sii902x = bridge_to_sii902x(bridge); regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA, SII902X_SYS_CTRL_PWR_DWN, SII902X_SYS_CTRL_PWR_DWN); } static void sii902x_bridge_enable(struct drm_bridge *bridge) { struct sii902x *sii902x = bridge_to_sii902x(bridge); regmap_update_bits(sii902x->regmap, SII902X_PWR_STATE_CTRL, SII902X_AVI_POWER_STATE_MSK, SII902X_AVI_POWER_STATE_D(0)); regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA, SII902X_SYS_CTRL_PWR_DWN, 0); } static void sii902x_bridge_mode_set(struct drm_bridge *bridge, struct drm_display_mode *mode, struct drm_display_mode *adj) { struct sii902x *sii902x = bridge_to_sii902x(bridge); struct regmap *regmap = sii902x->regmap; u8 buf[HDMI_INFOFRAME_SIZE(AVI)]; struct hdmi_avi_infoframe frame; int ret; buf[0] = adj->clock; buf[1] = adj->clock >> 8; buf[2] = adj->vrefresh; buf[3] = 0x00; buf[4] = adj->hdisplay; buf[5] = adj->hdisplay >> 8; buf[6] = adj->vdisplay; buf[7] = adj->vdisplay >> 8; buf[8] = SII902X_TPI_CLK_RATIO_1X | SII902X_TPI_AVI_PIXEL_REP_NONE | SII902X_TPI_AVI_PIXEL_REP_BUS_24BIT; buf[9] = SII902X_TPI_AVI_INPUT_RANGE_AUTO | SII902X_TPI_AVI_INPUT_COLORSPACE_RGB; ret = regmap_bulk_write(regmap, SII902X_TPI_VIDEO_DATA, buf, 10); if (ret) return; ret = drm_hdmi_avi_infoframe_from_display_mode(&frame, adj, false); if (ret < 0) { DRM_ERROR("couldn't fill AVI infoframe\n"); return; } ret = hdmi_avi_infoframe_pack(&frame, buf, sizeof(buf)); if (ret < 0) { DRM_ERROR("failed to pack AVI infoframe: %d\n", ret); return; } /* Do not send the infoframe header, but keep the CRC field. */ regmap_bulk_write(regmap, SII902X_TPI_AVI_INFOFRAME, buf + HDMI_INFOFRAME_HEADER_SIZE - 1, HDMI_AVI_INFOFRAME_SIZE + 1); } static int sii902x_bridge_attach(struct drm_bridge *bridge) { struct sii902x *sii902x = bridge_to_sii902x(bridge); struct drm_device *drm = bridge->dev; int ret; drm_connector_helper_add(&sii902x->connector, &sii902x_connector_helper_funcs); if (!drm_core_check_feature(drm, DRIVER_ATOMIC)) { dev_err(&sii902x->i2c->dev, "sii902x driver is only compatible with DRM devices supporting atomic updates\n"); return -ENOTSUPP; } ret = drm_connector_init(drm, &sii902x->connector, &sii902x_connector_funcs, DRM_MODE_CONNECTOR_HDMIA); if (ret) return ret; if (sii902x->i2c->irq > 0) sii902x->connector.polled = DRM_CONNECTOR_POLL_HPD; else sii902x->connector.polled = DRM_CONNECTOR_POLL_CONNECT; drm_connector_attach_encoder(&sii902x->connector, bridge->encoder); return 0; } static const struct drm_bridge_funcs sii902x_bridge_funcs = { .attach = sii902x_bridge_attach, .mode_set = sii902x_bridge_mode_set, .disable = sii902x_bridge_disable, .enable = sii902x_bridge_enable, }; static const struct regmap_range sii902x_volatile_ranges[] = { { .range_min = 0, .range_max = 0xff }, }; static const struct regmap_access_table sii902x_volatile_table = { .yes_ranges = sii902x_volatile_ranges, .n_yes_ranges = ARRAY_SIZE(sii902x_volatile_ranges), }; static const struct regmap_config sii902x_regmap_config = { .reg_bits = 8, .val_bits = 8, .volatile_table = &sii902x_volatile_table, .cache_type = REGCACHE_NONE, }; static irqreturn_t sii902x_interrupt(int irq, void *data) { struct sii902x *sii902x = data; unsigned int status = 0; regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status); regmap_write(sii902x->regmap, SII902X_INT_STATUS, status); if ((status & SII902X_HOTPLUG_EVENT) && sii902x->bridge.dev) drm_helper_hpd_irq_event(sii902x->bridge.dev); return IRQ_HANDLED; } /* * The purpose of sii902x_i2c_bypass_select is to enable the pass through * mode of the HDMI transmitter. Do not use regmap from within this function, * only use sii902x_*_unlocked functions to read/modify/write registers. * We are holding the parent adapter lock here, keep this in mind before * adding more i2c transactions. * * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere * in this driver, we need to make sure that we only touch 0x1A[2:1] from * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that * we leave the remaining bits as we have found them. */ static int sii902x_i2c_bypass_select(struct i2c_mux_core *mux, u32 chan_id) { struct sii902x *sii902x = i2c_mux_priv(mux); struct device *dev = &sii902x->i2c->dev; unsigned long timeout; u8 status; int ret; ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, SII902X_SYS_CTRL_DDC_BUS_REQ, SII902X_SYS_CTRL_DDC_BUS_REQ); if (ret) return ret; timeout = jiffies + msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS); do { ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, &status); if (ret) return ret; } while (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD) && time_before(jiffies, timeout)); if (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD)) { dev_err(dev, "Failed to acquire the i2c bus\n"); return -ETIMEDOUT; } return sii902x_write_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, status); } /* * The purpose of sii902x_i2c_bypass_deselect is to disable the pass through * mode of the HDMI transmitter. Do not use regmap from within this function, * only use sii902x_*_unlocked functions to read/modify/write registers. * We are holding the parent adapter lock here, keep this in mind before * adding more i2c transactions. * * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere * in this driver, we need to make sure that we only touch 0x1A[2:1] from * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that * we leave the remaining bits as we have found them. */ static int sii902x_i2c_bypass_deselect(struct i2c_mux_core *mux, u32 chan_id) { struct sii902x *sii902x = i2c_mux_priv(mux); struct device *dev = &sii902x->i2c->dev; unsigned long timeout; unsigned int retries; u8 status; int ret; /* * When the HDMI transmitter is in pass through mode, we need an * (undocumented) additional delay between STOP and START conditions * to guarantee the bus won't get stuck. */ udelay(30); /* * Sometimes the I2C bus can stall after failure to use the * EDID channel. Retry a few times to see if things clear * up, else continue anyway. */ retries = 5; do { ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, &status); retries--; } while (ret && retries); if (ret) { dev_err(dev, "failed to read status (%d)\n", ret); return ret; } ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, SII902X_SYS_CTRL_DDC_BUS_REQ | SII902X_SYS_CTRL_DDC_BUS_GRTD, 0); if (ret) return ret; timeout = jiffies + msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS); do { ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA, &status); if (ret) return ret; } while (status & (SII902X_SYS_CTRL_DDC_BUS_REQ | SII902X_SYS_CTRL_DDC_BUS_GRTD) && time_before(jiffies, timeout)); if (status & (SII902X_SYS_CTRL_DDC_BUS_REQ | SII902X_SYS_CTRL_DDC_BUS_GRTD)) { dev_err(dev, "failed to release the i2c bus\n"); return -ETIMEDOUT; } return 0; } static int sii902x_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct device *dev = &client->dev; unsigned int status = 0; struct sii902x *sii902x; u8 chipid[4]; int ret; ret = i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA); if (!ret) { dev_err(dev, "I2C adapter not suitable\n"); return -EIO; } sii902x = devm_kzalloc(dev, sizeof(*sii902x), GFP_KERNEL); if (!sii902x) return -ENOMEM; sii902x->i2c = client; sii902x->regmap = devm_regmap_init_i2c(client, &sii902x_regmap_config); if (IS_ERR(sii902x->regmap)) return PTR_ERR(sii902x->regmap); sii902x->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW); if (IS_ERR(sii902x->reset_gpio)) { dev_err(dev, "Failed to retrieve/request reset gpio: %ld\n", PTR_ERR(sii902x->reset_gpio)); return PTR_ERR(sii902x->reset_gpio); } sii902x_reset(sii902x); ret = regmap_write(sii902x->regmap, SII902X_REG_TPI_RQB, 0x0); if (ret) return ret; ret = regmap_bulk_read(sii902x->regmap, SII902X_REG_CHIPID(0), &chipid, 4); if (ret) { dev_err(dev, "regmap_read failed %d\n", ret); return ret; } if (chipid[0] != 0xb0) { dev_err(dev, "Invalid chipid: %02x (expecting 0xb0)\n", chipid[0]); return -EINVAL; } /* Clear all pending interrupts */ regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status); regmap_write(sii902x->regmap, SII902X_INT_STATUS, status); if (client->irq > 0) { regmap_write(sii902x->regmap, SII902X_INT_ENABLE, SII902X_HOTPLUG_EVENT); ret = devm_request_threaded_irq(dev, client->irq, NULL, sii902x_interrupt, IRQF_ONESHOT, dev_name(dev), sii902x); if (ret) return ret; } sii902x->bridge.funcs = &sii902x_bridge_funcs; sii902x->bridge.of_node = dev->of_node; drm_bridge_add(&sii902x->bridge); i2c_set_clientdata(client, sii902x); sii902x->i2cmux = i2c_mux_alloc(client->adapter, dev, 1, 0, I2C_MUX_GATE, sii902x_i2c_bypass_select, sii902x_i2c_bypass_deselect); if (!sii902x->i2cmux) return -ENOMEM; sii902x->i2cmux->priv = sii902x; return i2c_mux_add_adapter(sii902x->i2cmux, 0, 0, 0); } static int sii902x_remove(struct i2c_client *client) { struct sii902x *sii902x = i2c_get_clientdata(client); i2c_mux_del_adapters(sii902x->i2cmux); drm_bridge_remove(&sii902x->bridge); return 0; } static const struct of_device_id sii902x_dt_ids[] = { { .compatible = "sil,sii9022", }, { } }; MODULE_DEVICE_TABLE(of, sii902x_dt_ids); static const struct i2c_device_id sii902x_i2c_ids[] = { { "sii9022", 0 }, { }, }; MODULE_DEVICE_TABLE(i2c, sii902x_i2c_ids); static struct i2c_driver sii902x_driver = { .probe = sii902x_probe, .remove = sii902x_remove, .driver = { .name = "sii902x", .of_match_table = sii902x_dt_ids, }, .id_table = sii902x_i2c_ids, }; module_i2c_driver(sii902x_driver); MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>"); MODULE_DESCRIPTION("SII902x RGB -> HDMI bridges"); MODULE_LICENSE("GPL");
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