Hi,
cc'ing the drm/bridge maintainers which I think are missing (Andrzej
Hajda and Neil Armstrong)
Missatge de Matthias Brugger <matthias.bgg@xxxxxxxxx> del dia dl., 7
d’oct. 2019 a les 13:04:
>
>
>
> On 07/10/2019 10:22, Ulrich Hecht wrote:
> > From: Jitao Shi <jitao.shi@xxxxxxxxxxxx>
> >
> > This patch adds drm_bridge driver for parade DSI to eDP bridge chip.
> >
> > Signed-off-by: Jitao Shi <jitao.shi@xxxxxxxxxxxx>
> > Reviewed-by: Daniel Kurtz <djkurtz@xxxxxxxxxxxx>
> > Reviewed-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx>
> > [uli: followed API changes, removed FW update feature]
> > Signed-off-by: Ulrich Hecht <uli@xxxxxxxx>
>
> Now it works, thanks for pushing this forward :)
>
> Tested-by: Matthias Brugger <matthias.bgg@xxxxxxxxx>
>
This bridge is really needed in case you have an Acer Chromebook R13,
otherwise, you don't have the display working. Would be nice have it
upstream :-), If it helps, I tested this patch on top of current
5.4-rc8 and I get the display working, so
Tested-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx>
Thanks,
Enric
> > ---
> >
> > Changes since v19:
> > - fixed return value of ps8640_probe() when no panel is found
> >
> > Changes since v18:
> > - followed DRM API changes
> > - use DEVICE_ATTR_RO()
> > - remove firmware update code
> > - add SPDX identifier
> >
> > Changes since v17:
> > - remove some unused head files.
> > - add macros for ps8640 pages.
> > - remove ddc_i2c client
> > - add mipi_dsi_device_register_full
> > - remove the manufacturer from the name and i2c_device_id
> >
> > Changes since v16:
> > - Disable ps8640 DSI MCS Function.
> > - Rename gpios name more clearly.
> > - Tune the ps8640 power on sequence.
> >
> > Changes since v15:
> > - Drop drm_connector_(un)register calls from parade ps8640.
> > The main DRM driver mtk_drm_drv now calls
> > drm_connector_register_all() after drm_dev_register() in the
> > mtk_drm_bind() function. That function should iterate over all
> > connectors and call drm_connector_register() for each of them.
> > So, remove drm_connector_(un)register calls from parade ps8640.
> >
> > Changes since v14:
> > - update copyright info.
> > - change bridge_to_ps8640 and connector_to_ps8640 to inline function.
> > - fix some coding style.
> > - use sizeof as array counter.
> > - use drm_get_edid when read edid.
> > - add mutex when firmware updating.
> >
> > Changes since v13:
> > - add const on data, ps8640_write_bytes(struct i2c_client *client, const u8 *data, u16 data_len)
> > - fix PAGE2_SW_REST tyro.
> > - move the buf[3] init to entrance of the function.
> >
> > Changes since v12:
> > - fix hw_chip_id build warning
> >
> > Changes since v11:
> > - Remove depends on I2C, add DRM depends
> > - Reuse ps8640_write_bytes() in ps8640_write_byte()
> > - Use timer check for polling like the routines in <linux/iopoll.h>
> > - Fix no drm_connector_unregister/drm_connector_cleanup when ps8640_bridge_attach fail
> > - Check the ps8640 hardware id in ps8640_validate_firmware
> > - Remove fw_version check
> > - Move ps8640_validate_firmware before ps8640_enter_bl
> > - Add ddc_i2c unregister when probe fail and ps8640_remove
> >
> >
> > drivers/gpu/drm/bridge/Kconfig | 12 +
> > drivers/gpu/drm/bridge/Makefile | 1 +
> > drivers/gpu/drm/bridge/parade-ps8640.c | 672 +++++++++++++++++++++++++++++++++
> > 3 files changed, 685 insertions(+)
> > create mode 100644 drivers/gpu/drm/bridge/parade-ps8640.c
> >
> > diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
> > index 1cc9f50..61c6415 100644
> > --- a/drivers/gpu/drm/bridge/Kconfig
> > +++ b/drivers/gpu/drm/bridge/Kconfig
> > @@ -82,6 +82,18 @@ config DRM_PARADE_PS8622
> > ---help---
> > Parade eDP-LVDS bridge chip driver.
> >
> > +config DRM_PARADE_PS8640
> > + tristate "Parade PS8640 MIPI DSI to eDP Converter"
> > + depends on DRM
> > + depends on OF
> > + select DRM_KMS_HELPER
> > + select DRM_MIPI_DSI
> > + select DRM_PANEL
> > + help
> > + Choose this option if you have PS8640 for display
> > + The PS8640 is a high-performance and low-power
> > + MIPI DSI to eDP converter
> > +
> > config DRM_SIL_SII8620
> > tristate "Silicon Image SII8620 HDMI/MHL bridge"
> > depends on OF
> > diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
> > index 4934fcf..14660ab 100644
> > --- a/drivers/gpu/drm/bridge/Makefile
> > +++ b/drivers/gpu/drm/bridge/Makefile
> > @@ -6,6 +6,7 @@ obj-$(CONFIG_DRM_LVDS_ENCODER) += lvds-encoder.o
> > obj-$(CONFIG_DRM_MEGACHIPS_STDPXXXX_GE_B850V3_FW) += megachips-stdpxxxx-ge-b850v3-fw.o
> > obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o
> > obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o
> > +obj-$(CONFIG_DRM_PARADE_PS8640) += parade-ps8640.o
> > obj-$(CONFIG_DRM_SIL_SII8620) += sil-sii8620.o
> > obj-$(CONFIG_DRM_SII902X) += sii902x.o
> > obj-$(CONFIG_DRM_SII9234) += sii9234.o
> > diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c
> > new file mode 100644
> > index 0000000..ac27010
> > --- /dev/null
> > +++ b/drivers/gpu/drm/bridge/parade-ps8640.c
> > @@ -0,0 +1,672 @@
> > +// SPDX-License-Identifier: GPL-2.0-only
> > +/*
> > + * Copyright (c) 2016 MediaTek Inc.
> > + *
> > + * This program is free software; you can redistribute it and/or modify
> > + * it under the terms of the GNU General Public License version 2 as
> > + * published by the Free Software Foundation.
> > + *
> > + * 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/delay.h>
> > +#include <linux/err.h>
> > +#include <linux/firmware.h>
> > +#include <linux/gpio/consumer.h>
> > +#include <linux/i2c.h>
> > +#include <linux/module.h>
> > +#include <linux/of_graph.h>
> > +#include <linux/regulator/consumer.h>
> > +#include <asm/unaligned.h>
> > +#include <drm/drm_panel.h>
> > +
> > +#include <drm/drm_atomic_helper.h>
> > +#include <drm/drm_crtc_helper.h>
> > +#include <drm/drm_edid.h>
> > +#include <drm/drm_mipi_dsi.h>
> > +#include <drm/drm_print.h>
> > +#include <drm/drm_probe_helper.h>
> > +
> > +#define PAGE1_VSTART 0x6b
> > +#define PAGE2_SPI_CFG3 0x82
> > +#define I2C_TO_SPI_RESET 0x20
> > +#define PAGE2_ROMADD_BYTE1 0x8e
> > +#define PAGE2_ROMADD_BYTE2 0x8f
> > +#define PAGE2_SWSPI_WDATA 0x90
> > +#define PAGE2_SWSPI_RDATA 0x91
> > +#define PAGE2_SWSPI_LEN 0x92
> > +#define PAGE2_SWSPI_CTL 0x93
> > +#define TRIGGER_NO_READBACK 0x05
> > +#define TRIGGER_READBACK 0x01
> > +#define PAGE2_SPI_STATUS 0x9e
> > +#define SPI_READY 0x0c
> > +#define PAGE2_GPIO_L 0xa6
> > +#define PAGE2_GPIO_H 0xa7
> > +#define PS_GPIO9 BIT(1)
> > +#define PAGE2_IROM_CTRL 0xb0
> > +#define IROM_ENABLE 0xc0
> > +#define IROM_DISABLE 0x80
> > +#define PAGE2_SW_RESET 0xbc
> > +#define SPI_SW_RESET BIT(7)
> > +#define MPU_SW_RESET BIT(6)
> > +#define PAGE2_ENCTLSPI_WR 0xda
> > +#define PAGE2_I2C_BYPASS 0xea
> > +#define I2C_BYPASS_EN 0xd0
> > +#define PAGE2_MCS_EN 0xf3
> > +#define MCS_EN BIT(0)
> > +#define PAGE3_SET_ADD 0xfe
> > +#define PAGE3_SET_VAL 0xff
> > +#define VDO_CTL_ADD 0x13
> > +#define VDO_DIS 0x18
> > +#define VDO_EN 0x1c
> > +#define PAGE4_REV_L 0xf0
> > +#define PAGE4_REV_H 0xf1
> > +#define PAGE4_CHIP_L 0xf2
> > +#define PAGE4_CHIP_H 0xf3
> > +
> > +#define PAGE0_DP_CNTL 0
> > +#define PAGE1_VDO_BDG 1
> > +#define PAGE2_TOP_CNTL 2
> > +#define PAGE3_DSI_CNTL1 3
> > +#define PAGE4_MIPI_PHY 4
> > +#define PAGE5_VPLL 5
> > +#define PAGE6_DSI_CNTL2 6
> > +#define PAGE7_SPI_CNTL 7
> > +#define MAX_DEVS 0x8
> > +
> > +struct ps8640_info {
> > + u8 family_id;
> > + u8 variant_id;
> > + u16 version;
> > +};
> > +
> > +struct ps8640 {
> > + struct drm_connector connector;
> > + struct drm_bridge bridge;
> > + struct edid *edid;
> > + struct mipi_dsi_device *dsi;
> > + struct i2c_client *page[MAX_DEVS];
> > + struct regulator_bulk_data supplies[2];
> > + struct drm_panel *panel;
> > + struct gpio_desc *gpio_reset;
> > + struct gpio_desc *gpio_power_down;
> > + struct gpio_desc *gpio_mode_sel;
> > + bool enabled;
> > +
> > + /* firmware file info */
> > + struct ps8640_info info;
> > + bool in_fw_update;
> > + /* for firmware update protect */
> > + struct mutex fw_mutex;
> > +};
> > +
> > +static const u8 enc_ctrl_code[6] = { 0xaa, 0x55, 0x50, 0x41, 0x52, 0x44 };
> > +static const u8 hw_chip_id[4] = { 0x00, 0x0a, 0x00, 0x30 };
> > +
> > +static inline struct ps8640 *bridge_to_ps8640(struct drm_bridge *e)
> > +{
> > + return container_of(e, struct ps8640, bridge);
> > +}
> > +
> > +static inline struct ps8640 *connector_to_ps8640(struct drm_connector *e)
> > +{
> > + return container_of(e, struct ps8640, connector);
> > +}
> > +
> > +static int ps8640_read(struct i2c_client *client, u8 reg, u8 *data,
> > + u16 data_len)
> > +{
> > + int ret;
> > + struct i2c_msg msgs[] = {
> > + {
> > + .addr = client->addr,
> > + .flags = 0,
> > + .len = 1,
> > + .buf = ®,
> > + },
> > + {
> > + .addr = client->addr,
> > + .flags = I2C_M_RD,
> > + .len = data_len,
> > + .buf = data,
> > + }
> > + };
> > +
> > + ret = i2c_transfer(client->adapter, msgs, 2);
> > +
> > + if (ret == 2)
> > + return 0;
> > + if (ret < 0)
> > + return ret;
> > + else
> > + return -EIO;
> > +}
> > +
> > +static int ps8640_write_bytes(struct i2c_client *client, const u8 *data,
> > + u16 data_len)
> > +{
> > + int ret;
> > + struct i2c_msg msg;
> > +
> > + msg.addr = client->addr;
> > + msg.flags = 0;
> > + msg.len = data_len;
> > + msg.buf = (u8 *)data;
> > +
> > + ret = i2c_transfer(client->adapter, &msg, 1);
> > + if (ret == 1)
> > + return 0;
> > + if (ret < 0)
> > + return ret;
> > + else
> > + return -EIO;
> > +}
> > +
> > +static int ps8640_write_byte(struct i2c_client *client, u8 reg, u8 data)
> > +{
> > + u8 buf[] = { reg, data };
> > +
> > + return ps8640_write_bytes(client, buf, sizeof(buf));
> > +}
> > +
> > +static void ps8640_get_mcu_fw_version(struct ps8640 *ps_bridge)
> > +{
> > + struct i2c_client *client = ps_bridge->page[PAGE5_VPLL];
> > + u8 fw_ver[2];
> > +
> > + ps8640_read(client, 0x4, fw_ver, sizeof(fw_ver));
> > + ps_bridge->info.version = (fw_ver[0] << 8) | fw_ver[1];
> > +
> > + DRM_INFO_ONCE("ps8640 rom fw version %d.%d\n", fw_ver[0], fw_ver[1]);
> > +}
> > +
> > +static int ps8640_bridge_unmute(struct ps8640 *ps_bridge)
> > +{
> > + struct i2c_client *client = ps_bridge->page[PAGE3_DSI_CNTL1];
> > + u8 vdo_ctrl_buf[3] = { PAGE3_SET_ADD, VDO_CTL_ADD, VDO_EN };
> > +
> > + return ps8640_write_bytes(client, vdo_ctrl_buf, sizeof(vdo_ctrl_buf));
> > +}
> > +
> > +static int ps8640_bridge_mute(struct ps8640 *ps_bridge)
> > +{
> > + struct i2c_client *client = ps_bridge->page[PAGE3_DSI_CNTL1];
> > + u8 vdo_ctrl_buf[3] = { PAGE3_SET_ADD, VDO_CTL_ADD, VDO_DIS };
> > +
> > + return ps8640_write_bytes(client, vdo_ctrl_buf, sizeof(vdo_ctrl_buf));
> > +}
> > +
> > +static void ps8640_pre_enable(struct drm_bridge *bridge)
> > +{
> > + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge);
> > + struct i2c_client *client = ps_bridge->page[PAGE2_TOP_CNTL];
> > + struct i2c_client *page1 = ps_bridge->page[PAGE1_VDO_BDG];
> > + int err;
> > + u8 set_vdo_done, mcs_en, vstart;
> > + ktime_t timeout;
> > +
> > + if (ps_bridge->in_fw_update)
> > + return;
> > +
> > + if (ps_bridge->enabled)
> > + return;
> > +
> > + err = drm_panel_prepare(ps_bridge->panel);
> > + if (err < 0) {
> > + DRM_ERROR("failed to prepare panel: %d\n", err);
> > + return;
> > + }
> > +
> > + err = regulator_bulk_enable(ARRAY_SIZE(ps_bridge->supplies),
> > + ps_bridge->supplies);
> > + if (err < 0) {
> > + DRM_ERROR("cannot enable regulators %d\n", err);
> > + goto err_panel_unprepare;
> > + }
> > +
> > + gpiod_set_value(ps_bridge->gpio_power_down, 1);
> > + gpiod_set_value(ps_bridge->gpio_reset, 0);
> > + usleep_range(2000, 2500);
> > + gpiod_set_value(ps_bridge->gpio_reset, 1);
> > +
> > + /*
> > + * Wait for the ps8640 embed mcu ready
> > + * First wait 200ms and then check the mcu ready flag every 20ms
> > + */
> > + msleep(200);
> > +
> > + timeout = ktime_add_ms(ktime_get(), 200);
> > + for (;;) {
> > + err = ps8640_read(client, PAGE2_GPIO_H, &set_vdo_done, 1);
> > + if (err < 0) {
> > + DRM_ERROR("failed read PAGE2_GPIO_H: %d\n", err);
> > + goto err_regulators_disable;
> > + }
> > + if ((set_vdo_done & PS_GPIO9) == PS_GPIO9)
> > + break;
> > + if (ktime_compare(ktime_get(), timeout) > 0)
> > + break;
> > + msleep(20);
> > + }
> > +
> > + msleep(50);
> > +
> > + ps8640_read(page1, PAGE1_VSTART, &vstart, 1);
> > + DRM_INFO("PS8640 PAGE1.0x6B = 0x%x\n", vstart);
> > +
> > + /**
> > + * The Manufacturer Command Set (MCS) is a device dependent interface
> > + * intended for factory programming of the display module default
> > + * parameters. Once the display module is configured, the MCS shall be
> > + * disabled by the manufacturer. Once disabled, all MCS commands are
> > + * ignored by the display interface.
> > + */
> > + ps8640_read(client, PAGE2_MCS_EN, &mcs_en, 1);
> > + ps8640_write_byte(client, PAGE2_MCS_EN, mcs_en & ~MCS_EN);
> > +
> > + if (ps_bridge->info.version == 0)
> > + ps8640_get_mcu_fw_version(ps_bridge);
> > +
> > + err = ps8640_bridge_unmute(ps_bridge);
> > + if (err)
> > + DRM_ERROR("failed to enable unmutevideo: %d\n", err);
> > + /* Switch access edp panel's edid through i2c */
> > + ps8640_write_byte(client, PAGE2_I2C_BYPASS, I2C_BYPASS_EN);
> > + ps_bridge->enabled = true;
> > +
> > + return;
> > +
> > +err_regulators_disable:
> > + regulator_bulk_disable(ARRAY_SIZE(ps_bridge->supplies),
> > + ps_bridge->supplies);
> > +err_panel_unprepare:
> > + drm_panel_unprepare(ps_bridge->panel);
> > +}
> > +
> > +static void ps8640_enable(struct drm_bridge *bridge)
> > +{
> > + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge);
> > + int err;
> > +
> > + err = drm_panel_enable(ps_bridge->panel);
> > + if (err < 0)
> > + DRM_ERROR("failed to enable panel: %d\n", err);
> > +}
> > +
> > +static void ps8640_disable(struct drm_bridge *bridge)
> > +{
> > + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge);
> > + int err;
> > +
> > + err = drm_panel_disable(ps_bridge->panel);
> > + if (err < 0)
> > + DRM_ERROR("failed to disable panel: %d\n", err);
> > +}
> > +
> > +static void ps8640_post_disable(struct drm_bridge *bridge)
> > +{
> > + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge);
> > + int err;
> > +
> > + if (ps_bridge->in_fw_update)
> > + return;
> > +
> > + if (!ps_bridge->enabled)
> > + return;
> > +
> > + ps_bridge->enabled = false;
> > +
> > + err = ps8640_bridge_mute(ps_bridge);
> > + if (err < 0)
> > + DRM_ERROR("failed to unmutevideo: %d\n", err);
> > +
> > + gpiod_set_value(ps_bridge->gpio_reset, 0);
> > + gpiod_set_value(ps_bridge->gpio_power_down, 0);
> > + err = regulator_bulk_disable(ARRAY_SIZE(ps_bridge->supplies),
> > + ps_bridge->supplies);
> > + if (err < 0)
> > + DRM_ERROR("cannot disable regulators %d\n", err);
> > +
> > + err = drm_panel_unprepare(ps_bridge->panel);
> > + if (err)
> > + DRM_ERROR("failed to unprepare panel: %d\n", err);
> > +}
> > +
> > +static int ps8640_get_modes(struct drm_connector *connector)
> > +{
> > + struct ps8640 *ps_bridge = connector_to_ps8640(connector);
> > + struct edid *edid;
> > + int num_modes = 0;
> > + bool power_off;
> > +
> > + if (ps_bridge->edid)
> > + return drm_add_edid_modes(connector, ps_bridge->edid);
> > +
> > + power_off = !ps_bridge->enabled;
> > + ps8640_pre_enable(&ps_bridge->bridge);
> > +
> > + edid = drm_get_edid(connector, ps_bridge->page[0]->adapter);
> > + if (!edid)
> > + goto out;
> > +
> > + ps_bridge->edid = edid;
> > + drm_connector_update_edid_property(connector, ps_bridge->edid);
> > + num_modes = drm_add_edid_modes(connector, ps_bridge->edid);
> > +
> > +out:
> > + if (power_off)
> > + ps8640_post_disable(&ps_bridge->bridge);
> > +
> > + return num_modes;
> > +}
> > +
> > +static const struct drm_connector_helper_funcs ps8640_connector_helper_funcs = {
> > + .get_modes = ps8640_get_modes,
> > +};
> > +
> > +static enum drm_connector_status ps8640_detect(struct drm_connector *connector,
> > + bool force)
> > +{
> > + return connector_status_connected;
> > +}
> > +
> > +static const struct drm_connector_funcs ps8640_connector_funcs = {
> > + .fill_modes = drm_helper_probe_single_connector_modes,
> > + .detect = ps8640_detect,
> > + .reset = drm_atomic_helper_connector_reset,
> > + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
> > + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
> > +};
> > +
> > +int ps8640_bridge_attach(struct drm_bridge *bridge)
> > +{
> > + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge);
> > + struct device *dev = &ps_bridge->page[0]->dev;
> > + struct device_node *in_ep, *dsi_node = NULL;
> > + struct mipi_dsi_device *dsi;
> > + struct mipi_dsi_host *host = NULL;
> > + int ret;
> > + const struct mipi_dsi_device_info info = { .type = "ps8640",
> > + .channel = 0,
> > + .node = NULL,
> > + };
> > +
> > + ret = drm_connector_init(bridge->dev, &ps_bridge->connector,
> > + &ps8640_connector_funcs,
> > + DRM_MODE_CONNECTOR_eDP);
> > +
> > + if (ret) {
> > + DRM_ERROR("Failed to initialize connector with drm: %d\n", ret);
> > + return ret;
> > + }
> > +
> > + drm_connector_helper_add(&ps_bridge->connector,
> > + &ps8640_connector_helper_funcs);
> > +
> > + ps_bridge->connector.dpms = DRM_MODE_DPMS_ON;
> > + drm_connector_attach_encoder(&ps_bridge->connector,
> > + bridge->encoder);
> > +
> > + if (ps_bridge->panel)
> > + drm_panel_attach(ps_bridge->panel, &ps_bridge->connector);
> > +
> > + /* port@0 is ps8640 dsi input port */
> > + in_ep = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1);
> > + if (in_ep) {
> > + dsi_node = of_graph_get_remote_port_parent(in_ep);
> > + of_node_put(in_ep);
> > + }
> > +
> > + if (dsi_node) {
> > + host = of_find_mipi_dsi_host_by_node(dsi_node);
> > + of_node_put(dsi_node);
> > + if (!host) {
> > + ret = -ENODEV;
> > + goto err;
> > + }
> > + }
> > +
> > + dsi = mipi_dsi_device_register_full(host, &info);
> > + if (IS_ERR(dsi)) {
> > + dev_err(dev, "failed to create dsi device\n");
> > + ret = PTR_ERR(dsi);
> > + goto err;
> > + }
> > +
> > + ps_bridge->dsi = dsi;
> > +
> > + dsi->host = host;
> > + dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
> > + MIPI_DSI_MODE_VIDEO_SYNC_PULSE;
> > + dsi->format = MIPI_DSI_FMT_RGB888;
> > + dsi->lanes = 4;
> > + ret = mipi_dsi_attach(dsi);
> > + if (ret)
> > + goto err_dsi_attach;
> > +
> > + return 0;
> > +
> > +err_dsi_attach:
> > + mipi_dsi_device_unregister(dsi);
> > +err:
> > + if (ps_bridge->panel)
> > + drm_panel_detach(ps_bridge->panel);
> > + drm_connector_cleanup(&ps_bridge->connector);
> > + return ret;
> > +}
> > +
> > +static const struct drm_bridge_funcs ps8640_bridge_funcs = {
> > + .attach = ps8640_bridge_attach,
> > + .disable = ps8640_disable,
> > + .post_disable = ps8640_post_disable,
> > + .pre_enable = ps8640_pre_enable,
> > + .enable = ps8640_enable,
> > +};
> > +
> > +/* Firmware Version is returned as Major.Minor */
> > +static ssize_t fw_version_show(struct device *dev,
> > + struct device_attribute *attr, char *buf)
> > +{
> > + struct ps8640 *ps_bridge = dev_get_drvdata(dev);
> > + struct ps8640_info *info = &ps_bridge->info;
> > +
> > + return scnprintf(buf, PAGE_SIZE, "%u.%u\n", info->version >> 8,
> > + info->version & 0xff);
> > +}
> > +
> > +/* Hardware Version is returned as FamilyID.VariantID */
> > +static ssize_t hw_version_show(struct device *dev,
> > + struct device_attribute *attr, char *buf)
> > +{
> > + struct ps8640 *ps_bridge = dev_get_drvdata(dev);
> > + struct ps8640_info *info = &ps_bridge->info;
> > +
> > + return scnprintf(buf, PAGE_SIZE, "ps%u.%u\n", info->family_id,
> > + info->variant_id);
> > +}
> > +
> > +static DEVICE_ATTR_RO(fw_version);
> > +static DEVICE_ATTR_RO(hw_version);
> > +
> > +static struct attribute *ps8640_attrs[] = {
> > + &dev_attr_fw_version.attr,
> > + &dev_attr_hw_version.attr,
> > + NULL
> > +};
> > +
> > +static const struct attribute_group ps8640_attr_group = {
> > + .attrs = ps8640_attrs,
> > +};
> > +
> > +static void ps8640_remove_sysfs_group(void *data)
> > +{
> > + struct ps8640 *ps_bridge = data;
> > +
> > + sysfs_remove_group(&ps_bridge->page[0]->dev.kobj, &ps8640_attr_group);
> > +}
> > +
> > +static int ps8640_probe(struct i2c_client *client,
> > + const struct i2c_device_id *id)
> > +{
> > + struct device *dev = &client->dev;
> > + struct ps8640 *ps_bridge;
> > + struct device_node *np = dev->of_node;
> > + struct device_node *port, *out_ep;
> > + struct device_node *panel_node = NULL;
> > + int ret;
> > + u32 i;
> > +
> > + ps_bridge = devm_kzalloc(dev, sizeof(*ps_bridge), GFP_KERNEL);
> > + if (!ps_bridge)
> > + return -ENOMEM;
> > +
> > + /* port@1 is ps8640 output port */
> > + port = of_graph_get_port_by_id(np, 1);
> > + if (port) {
> > + out_ep = of_get_child_by_name(port, "endpoint");
> > + of_node_put(port);
> > + if (out_ep) {
> > + panel_node = of_graph_get_remote_port_parent(out_ep);
> > + of_node_put(out_ep);
> > + }
> > + }
> > + if (panel_node) {
> > + ps_bridge->panel = of_drm_find_panel(panel_node);
> > + of_node_put(panel_node);
> > + if (IS_ERR(ps_bridge->panel))
> > + return PTR_ERR(ps_bridge->panel);
> > + }
> > +
> > + mutex_init(&ps_bridge->fw_mutex);
> > + ps_bridge->supplies[0].supply = "vdd33";
> > + ps_bridge->supplies[1].supply = "vdd12";
> > + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ps_bridge->supplies),
> > + ps_bridge->supplies);
> > + if (ret) {
> > + dev_info(dev, "failed to get regulators: %d\n", ret);
> > + return ret;
> > + }
> > +
> > + ps_bridge->gpio_mode_sel = devm_gpiod_get_optional(&client->dev,
> > + "mode-sel",
> > + GPIOD_OUT_HIGH);
> > + if (IS_ERR(ps_bridge->gpio_mode_sel)) {
> > + ret = PTR_ERR(ps_bridge->gpio_mode_sel);
> > + dev_err(dev, "cannot get mode-sel %d\n", ret);
> > + return ret;
> > + }
> > +
> > + ps_bridge->gpio_power_down = devm_gpiod_get(&client->dev, "sleep",
> > + GPIOD_OUT_LOW);
> > + if (IS_ERR(ps_bridge->gpio_power_down)) {
> > + ret = PTR_ERR(ps_bridge->gpio_power_down);
> > + dev_err(dev, "cannot get sleep: %d\n", ret);
> > + return ret;
> > + }
> > +
> > + /*
> > + * Request the reset pin low to avoid the bridge being
> > + * initialized prematurely
> > + */
> > + ps_bridge->gpio_reset = devm_gpiod_get(&client->dev, "reset",
> > + GPIOD_OUT_LOW);
> > + if (IS_ERR(ps_bridge->gpio_reset)) {
> > + ret = PTR_ERR(ps_bridge->gpio_reset);
> > + dev_err(dev, "cannot get reset: %d\n", ret);
> > + return ret;
> > + }
> > +
> > + ps_bridge->bridge.funcs = &ps8640_bridge_funcs;
> > + ps_bridge->bridge.of_node = dev->of_node;
> > +
> > + ps_bridge->page[0] = client;
> > +
> > + /*
> > + * ps8640 uses multiple addresses, use dummy devices for them
> > + * page[0]: for DP control
> > + * page[1]: for VIDEO Bridge
> > + * page[2]: for control top
> > + * page[3]: for DSI Link Control1
> > + * page[4]: for MIPI Phy
> > + * page[5]: for VPLL
> > + * page[6]: for DSI Link Control2
> > + * page[7]: for spi rom mapping
> > + */
> > + for (i = 1; i < MAX_DEVS; i++) {
> > + ps_bridge->page[i] = i2c_new_dummy(client->adapter,
> > + client->addr + i);
> > + if (!ps_bridge->page[i]) {
> > + dev_err(dev, "failed i2c dummy device, address%02x\n",
> > + client->addr + i);
> > + ret = -EBUSY;
> > + goto exit_dummy;
> > + }
> > + }
> > + i2c_set_clientdata(client, ps_bridge);
> > +
> > + ret = sysfs_create_group(&client->dev.kobj, &ps8640_attr_group);
> > + if (ret) {
> > + dev_err(dev, "failed to create sysfs entries: %d\n", ret);
> > + goto exit_dummy;
> > + }
> > +
> > + ret = devm_add_action(dev, ps8640_remove_sysfs_group, ps_bridge);
> > + if (ret) {
> > + dev_err(dev, "failed to add sysfs cleanup action: %d\n", ret);
> > + goto exit_remove_sysfs;
> > + }
> > +
> > + drm_bridge_add(&ps_bridge->bridge);
> > + return 0;
> > +
> > +exit_remove_sysfs:
> > + sysfs_remove_group(&ps_bridge->page[0]->dev.kobj, &ps8640_attr_group);
> > +exit_dummy:
> > + while (--i)
> > + i2c_unregister_device(ps_bridge->page[i]);
> > + return ret;
> > +}
> > +
> > +static int ps8640_remove(struct i2c_client *client)
> > +{
> > + struct ps8640 *ps_bridge = i2c_get_clientdata(client);
> > + int i = MAX_DEVS;
> > +
> > + drm_bridge_remove(&ps_bridge->bridge);
> > + sysfs_remove_group(&ps_bridge->page[0]->dev.kobj, &ps8640_attr_group);
> > + while (--i)
> > + i2c_unregister_device(ps_bridge->page[i]);
> > +
> > + return 0;
> > +}
> > +
> > +static const struct i2c_device_id ps8640_i2c_table[] = {
> > + { "ps8640", 0 },
> > + { /* sentinel */ },
> > +};
> > +MODULE_DEVICE_TABLE(i2c, ps8640_i2c_table);
> > +
> > +static const struct of_device_id ps8640_match[] = {
> > + { .compatible = "parade,ps8640" },
> > + { /* sentinel */ },
> > +};
> > +MODULE_DEVICE_TABLE(of, ps8640_match);
> > +
> > +static struct i2c_driver ps8640_driver = {
> > + .id_table = ps8640_i2c_table,
> > + .probe = ps8640_probe,
> > + .remove = ps8640_remove,
> > + .driver = {
> > + .name = "ps8640",
> > + .of_match_table = ps8640_match,
> > + },
> > +};
> > +module_i2c_driver(ps8640_driver);
> > +
> > +MODULE_AUTHOR("Jitao Shi <jitao.shi@xxxxxxxxxxxx>");
> > +MODULE_AUTHOR("CK Hu <ck.hu@xxxxxxxxxxxx>");
> > +MODULE_DESCRIPTION("PARADE ps8640 DSI-eDP converter driver");
> > +MODULE_LICENSE("GPL v2");
> >
> _______________________________________________
> dri-devel mailing list
> dri-devel@xxxxxxxxxxxxxxxxxxxxx
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
_______________________________________________
dri-devel mailing list
dri-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/dri-devel
