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drm/bridge: Introduce LT8912B DSI to HDMI bridge
Lontium LT8912B is a DSI to HDMI bridge. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Adrien Grassein <adrien.grassein@gmail.com> Reviewed-by: Robert Foss <robert.foss@linaro.org> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210326121955.1266230-3-adrien.grassein@gmail.com
This commit is contained in:
Adrien Grassein
Robert Foss
parent
3aa6031dee
commit
30e2ae943c
@ -10479,6 +10479,7 @@ LONTIUM LT8912B MIPI TO HDMI BRIDGE
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M: Adrien Grassein <adrien.grassein@gmail.com>
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S: Maintained
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F: Documentation/devicetree/bindings/display/bridge/lontium,lt8912b.yaml
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F: drivers/gpu/drm/bridge/lontium-lt8912b.c
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LSILOGIC MPT FUSION DRIVERS (FC/SAS/SPI)
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M: Sathya Prakash <sathya.prakash@broadcom.com>
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@ -61,6 +61,20 @@ config DRM_DISPLAY_CONNECTOR
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on ARM-based platforms. Saying Y here when this driver is not needed
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will not cause any issue.
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config DRM_LONTIUM_LT8912B
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tristate "Lontium LT8912B DSI/HDMI bridge"
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depends on OF
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select DRM_PANEL_BRIDGE
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select DRM_KMS_HELPER
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select REGMAP_I2C
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help
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Driver for Lontium LT8912B DSI to HDMI bridge
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chip driver.
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Please say Y if you have such hardware.
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Say M here if you want to support this hardware as a module.
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The module will be named "lontium-lt8912b".
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config DRM_LONTIUM_LT9611
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tristate "Lontium LT9611 DSI/HDMI bridge"
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select SND_SOC_HDMI_CODEC if SND_SOC
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@ -3,6 +3,7 @@ obj-$(CONFIG_DRM_CDNS_DSI) += cdns-dsi.o
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obj-$(CONFIG_DRM_CHIPONE_ICN6211) += chipone-icn6211.o
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obj-$(CONFIG_DRM_CHRONTEL_CH7033) += chrontel-ch7033.o
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obj-$(CONFIG_DRM_DISPLAY_CONNECTOR) += display-connector.o
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obj-$(CONFIG_DRM_LONTIUM_LT8912B) += lontium-lt8912b.o
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obj-$(CONFIG_DRM_LONTIUM_LT9611) += lontium-lt9611.o
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obj-$(CONFIG_DRM_LONTIUM_LT9611UXC) += lontium-lt9611uxc.o
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obj-$(CONFIG_DRM_LVDS_CODEC) += lvds-codec.o
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765
drivers/gpu/drm/bridge/lontium-lt8912b.c
Normal file
765
drivers/gpu/drm/bridge/lontium-lt8912b.c
Normal file
@ -0,0 +1,765 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2018, The Linux Foundation. All rights reserved.
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*/
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#include <linux/device.h>
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#include <linux/delay.h>
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#include <linux/i2c.h>
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#include <linux/gpio.h>
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#include <linux/of_gpio.h>
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#include <linux/regmap.h>
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#include <drm/drm_probe_helper.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_mipi_dsi.h>
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#include <drm/drm_of.h>
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#include <video/videomode.h>
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#define I2C_MAIN 0
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#define I2C_ADDR_MAIN 0x48
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#define I2C_CEC_DSI 1
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#define I2C_ADDR_CEC_DSI 0x49
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#define I2C_MAX_IDX 2
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struct lt8912 {
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struct device *dev;
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struct drm_bridge bridge;
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struct drm_connector connector;
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struct i2c_client *i2c_client[I2C_MAX_IDX];
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struct regmap *regmap[I2C_MAX_IDX];
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struct device_node *host_node;
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struct drm_bridge *hdmi_port;
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struct mipi_dsi_device *dsi;
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struct gpio_desc *gp_reset;
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struct videomode mode;
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u8 data_lanes;
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bool is_power_on;
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bool is_attached;
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};
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static int lt8912_write_init_config(struct lt8912 *lt)
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{
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const struct reg_sequence seq[] = {
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/* Digital clock en*/
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{0x08, 0xff},
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{0x09, 0xff},
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{0x0a, 0xff},
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{0x0b, 0x7c},
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{0x0c, 0xff},
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{0x42, 0x04},
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/*Tx Analog*/
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{0x31, 0xb1},
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{0x32, 0xb1},
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{0x33, 0x0e},
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{0x37, 0x00},
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{0x38, 0x22},
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{0x60, 0x82},
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/*Cbus Analog*/
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{0x39, 0x45},
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{0x3a, 0x00},
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{0x3b, 0x00},
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/*HDMI Pll Analog*/
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{0x44, 0x31},
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{0x55, 0x44},
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{0x57, 0x01},
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{0x5a, 0x02},
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/*MIPI Analog*/
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{0x3e, 0xd6},
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{0x3f, 0xd4},
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{0x41, 0x3c},
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{0xB2, 0x00},
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};
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return regmap_multi_reg_write(lt->regmap[I2C_MAIN], seq, ARRAY_SIZE(seq));
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}
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static int lt8912_write_mipi_basic_config(struct lt8912 *lt)
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{
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const struct reg_sequence seq[] = {
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{0x12, 0x04},
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{0x14, 0x00},
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{0x15, 0x00},
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{0x1a, 0x03},
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{0x1b, 0x03},
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};
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return regmap_multi_reg_write(lt->regmap[I2C_CEC_DSI], seq, ARRAY_SIZE(seq));
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};
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static int lt8912_write_dds_config(struct lt8912 *lt)
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{
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const struct reg_sequence seq[] = {
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{0x4e, 0xff},
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{0x4f, 0x56},
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{0x50, 0x69},
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{0x51, 0x80},
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{0x1f, 0x5e},
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{0x20, 0x01},
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{0x21, 0x2c},
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{0x22, 0x01},
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{0x23, 0xfa},
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{0x24, 0x00},
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{0x25, 0xc8},
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{0x26, 0x00},
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{0x27, 0x5e},
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{0x28, 0x01},
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{0x29, 0x2c},
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{0x2a, 0x01},
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{0x2b, 0xfa},
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{0x2c, 0x00},
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{0x2d, 0xc8},
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{0x2e, 0x00},
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{0x42, 0x64},
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{0x43, 0x00},
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{0x44, 0x04},
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{0x45, 0x00},
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{0x46, 0x59},
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{0x47, 0x00},
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{0x48, 0xf2},
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{0x49, 0x06},
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{0x4a, 0x00},
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{0x4b, 0x72},
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{0x4c, 0x45},
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{0x4d, 0x00},
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{0x52, 0x08},
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{0x53, 0x00},
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{0x54, 0xb2},
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{0x55, 0x00},
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{0x56, 0xe4},
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{0x57, 0x0d},
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{0x58, 0x00},
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{0x59, 0xe4},
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{0x5a, 0x8a},
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{0x5b, 0x00},
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{0x5c, 0x34},
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{0x1e, 0x4f},
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{0x51, 0x00},
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};
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return regmap_multi_reg_write(lt->regmap[I2C_CEC_DSI], seq, ARRAY_SIZE(seq));
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}
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static int lt8912_write_rxlogicres_config(struct lt8912 *lt)
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{
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int ret;
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ret = regmap_write(lt->regmap[I2C_MAIN], 0x03, 0x7f);
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usleep_range(10000, 20000);
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ret |= regmap_write(lt->regmap[I2C_MAIN], 0x03, 0xff);
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return ret;
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};
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static int lt8912_write_lvds_config(struct lt8912 *lt)
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{
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const struct reg_sequence seq[] = {
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{0x44, 0x30},
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{0x51, 0x05},
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{0x50, 0x24},
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{0x51, 0x2d},
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{0x52, 0x04},
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{0x69, 0x0e},
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{0x69, 0x8e},
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{0x6a, 0x00},
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{0x6c, 0xb8},
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{0x6b, 0x51},
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{0x04, 0xfb},
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{0x04, 0xff},
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{0x7f, 0x00},
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{0xa8, 0x13},
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{0x02, 0xf7},
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{0x02, 0xff},
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{0x03, 0xcf},
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{0x03, 0xff},
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};
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return regmap_multi_reg_write(lt->regmap[I2C_CEC_DSI], seq, ARRAY_SIZE(seq));
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};
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static inline struct lt8912 *bridge_to_lt8912(struct drm_bridge *b)
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{
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return container_of(b, struct lt8912, bridge);
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}
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static inline struct lt8912 *connector_to_lt8912(struct drm_connector *c)
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{
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return container_of(c, struct lt8912, connector);
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}
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static const struct regmap_config lt8912_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = 0xff,
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};
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static int lt8912_init_i2c(struct lt8912 *lt, struct i2c_client *client)
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{
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unsigned int i;
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/*
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* At this time we only initialize 2 chips, but the lt8912 provides
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* a third interface for the audio over HDMI configuration.
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*/
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struct i2c_board_info info[] = {
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{ I2C_BOARD_INFO("lt8912p0", I2C_ADDR_MAIN), },
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{ I2C_BOARD_INFO("lt8912p1", I2C_ADDR_CEC_DSI), },
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};
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if (!lt)
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return -ENODEV;
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for (i = 0; i < ARRAY_SIZE(info); i++) {
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if (i > 0) {
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lt->i2c_client[i] = i2c_new_dummy_device(client->adapter,
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info[i].addr);
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if (IS_ERR(lt->i2c_client[i]))
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return PTR_ERR(lt->i2c_client[i]);
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}
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lt->regmap[i] = devm_regmap_init_i2c(lt->i2c_client[i],
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<8912_regmap_config);
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if (IS_ERR(lt->regmap[i]))
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return PTR_ERR(lt->regmap[i]);
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}
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return 0;
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}
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static int lt8912_free_i2c(struct lt8912 *lt)
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{
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unsigned int i;
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for (i = 1; i < I2C_MAX_IDX; i++)
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i2c_unregister_device(lt->i2c_client[i]);
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return 0;
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}
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static int lt8912_hard_power_on(struct lt8912 *lt)
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{
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gpiod_set_value_cansleep(lt->gp_reset, 0);
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msleep(20);
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return 0;
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}
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static void lt8912_hard_power_off(struct lt8912 *lt)
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{
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gpiod_set_value_cansleep(lt->gp_reset, 1);
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msleep(20);
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lt->is_power_on = false;
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}
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static int lt8912_video_setup(struct lt8912 *lt)
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{
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u32 hactive, h_total, hpw, hfp, hbp;
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u32 vactive, v_total, vpw, vfp, vbp;
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u8 settle = 0x08;
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int ret;
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if (!lt)
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return -EINVAL;
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hactive = lt->mode.hactive;
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hfp = lt->mode.hfront_porch;
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hpw = lt->mode.hsync_len;
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hbp = lt->mode.hback_porch;
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h_total = hactive + hfp + hpw + hbp;
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vactive = lt->mode.vactive;
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vfp = lt->mode.vfront_porch;
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vpw = lt->mode.vsync_len;
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vbp = lt->mode.vback_porch;
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v_total = vactive + vfp + vpw + vbp;
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if (vactive <= 600)
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settle = 0x04;
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else if (vactive == 1080)
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settle = 0x0a;
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ret = regmap_write(lt->regmap[I2C_CEC_DSI], 0x10, 0x01);
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ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x11, settle);
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ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x18, hpw);
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ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x19, vpw);
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ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x1c, hactive & 0xff);
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ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x1d, hactive >> 8);
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ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x2f, 0x0c);
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ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x34, h_total & 0xff);
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ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x35, h_total >> 8);
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ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x36, v_total & 0xff);
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ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x37, v_total >> 8);
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ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x38, vbp & 0xff);
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ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x39, vbp >> 8);
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ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x3a, vfp & 0xff);
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ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x3b, vfp >> 8);
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ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x3c, hbp & 0xff);
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ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x3d, hbp >> 8);
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ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x3e, hfp & 0xff);
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ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x3f, hfp >> 8);
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return ret;
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}
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static int lt8912_soft_power_on(struct lt8912 *lt)
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{
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if (!lt->is_power_on) {
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u32 lanes = lt->data_lanes;
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lt8912_write_init_config(lt);
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regmap_write(lt->regmap[I2C_CEC_DSI], 0x13, lanes & 3);
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lt8912_write_mipi_basic_config(lt);
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lt->is_power_on = true;
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}
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return 0;
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}
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static int lt8912_video_on(struct lt8912 *lt)
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{
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int ret;
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ret = lt8912_video_setup(lt);
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if (ret < 0)
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goto end;
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ret = lt8912_write_dds_config(lt);
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if (ret < 0)
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goto end;
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ret = lt8912_write_rxlogicres_config(lt);
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if (ret < 0)
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goto end;
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ret = lt8912_write_lvds_config(lt);
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if (ret < 0)
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goto end;
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end:
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return ret;
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}
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static enum drm_connector_status lt8912_check_cable_status(struct lt8912 *lt)
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{
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int ret;
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unsigned int reg_val;
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ret = regmap_read(lt->regmap[I2C_MAIN], 0xC1, ®_val);
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if (ret)
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return connector_status_unknown;
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if (reg_val & BIT(7))
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return connector_status_connected;
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return connector_status_disconnected;
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}
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static enum drm_connector_status
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lt8912_connector_detect(struct drm_connector *connector, bool force)
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{
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struct lt8912 *lt = connector_to_lt8912(connector);
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if (lt->hdmi_port->ops & DRM_BRIDGE_OP_DETECT)
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return drm_bridge_detect(lt->hdmi_port);
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return lt8912_check_cable_status(lt);
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}
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static const struct drm_connector_funcs lt8912_connector_funcs = {
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.detect = lt8912_connector_detect,
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.fill_modes = drm_helper_probe_single_connector_modes,
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.destroy = drm_connector_cleanup,
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.reset = drm_atomic_helper_connector_reset,
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.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
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};
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static enum drm_mode_status
|
||||
lt8912_connector_mode_valid(struct drm_connector *connector,
|
||||
struct drm_display_mode *mode)
|
||||
{
|
||||
if (mode->clock > 150000)
|
||||
return MODE_CLOCK_HIGH;
|
||||
|
||||
if (mode->hdisplay > 1920)
|
||||
return MODE_BAD_HVALUE;
|
||||
|
||||
if (mode->vdisplay > 1080)
|
||||
return MODE_BAD_VVALUE;
|
||||
|
||||
return MODE_OK;
|
||||
}
|
||||
|
||||
static int lt8912_connector_get_modes(struct drm_connector *connector)
|
||||
{
|
||||
struct edid *edid;
|
||||
int ret = -1;
|
||||
int num = 0;
|
||||
struct lt8912 *lt = connector_to_lt8912(connector);
|
||||
u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
|
||||
|
||||
edid = drm_bridge_get_edid(lt->hdmi_port, connector);
|
||||
if (edid) {
|
||||
drm_connector_update_edid_property(connector, edid);
|
||||
num = drm_add_edid_modes(connector, edid);
|
||||
} else {
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = drm_display_info_set_bus_formats(&connector->display_info,
|
||||
&bus_format, 1);
|
||||
if (ret)
|
||||
num = ret;
|
||||
|
||||
kfree(edid);
|
||||
return num;
|
||||
}
|
||||
|
||||
static const struct drm_connector_helper_funcs lt8912_connector_helper_funcs = {
|
||||
.get_modes = lt8912_connector_get_modes,
|
||||
.mode_valid = lt8912_connector_mode_valid,
|
||||
};
|
||||
|
||||
static void lt8912_bridge_mode_set(struct drm_bridge *bridge,
|
||||
const struct drm_display_mode *mode,
|
||||
const struct drm_display_mode *adj)
|
||||
{
|
||||
struct lt8912 *lt = bridge_to_lt8912(bridge);
|
||||
|
||||
drm_display_mode_to_videomode(adj, <->mode);
|
||||
}
|
||||
|
||||
static void lt8912_bridge_enable(struct drm_bridge *bridge)
|
||||
{
|
||||
struct lt8912 *lt = bridge_to_lt8912(bridge);
|
||||
|
||||
lt8912_video_on(lt);
|
||||
}
|
||||
|
||||
static int lt8912_attach_dsi(struct lt8912 *lt)
|
||||
{
|
||||
struct device *dev = lt->dev;
|
||||
struct mipi_dsi_host *host;
|
||||
struct mipi_dsi_device *dsi;
|
||||
int ret = -1;
|
||||
const struct mipi_dsi_device_info info = { .type = "lt8912",
|
||||
.channel = 0,
|
||||
.node = NULL,
|
||||
};
|
||||
|
||||
host = of_find_mipi_dsi_host_by_node(lt->host_node);
|
||||
if (!host) {
|
||||
dev_err(dev, "failed to find dsi host\n");
|
||||
return -EPROBE_DEFER;
|
||||
}
|
||||
|
||||
dsi = mipi_dsi_device_register_full(host, &info);
|
||||
if (IS_ERR(dsi)) {
|
||||
ret = PTR_ERR(dsi);
|
||||
dev_err(dev, "failed to create dsi device (%d)\n", ret);
|
||||
goto err_dsi_device;
|
||||
}
|
||||
|
||||
lt->dsi = dsi;
|
||||
|
||||
dsi->lanes = lt->data_lanes;
|
||||
dsi->format = MIPI_DSI_FMT_RGB888;
|
||||
|
||||
dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
|
||||
MIPI_DSI_MODE_VIDEO_BURST |
|
||||
MIPI_DSI_MODE_LPM |
|
||||
MIPI_DSI_MODE_EOT_PACKET;
|
||||
|
||||
ret = mipi_dsi_attach(dsi);
|
||||
if (ret < 0) {
|
||||
dev_err(dev, "failed to attach dsi to host\n");
|
||||
goto err_dsi_attach;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
err_dsi_attach:
|
||||
mipi_dsi_device_unregister(dsi);
|
||||
err_dsi_device:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void lt8912_detach_dsi(struct lt8912 *lt)
|
||||
{
|
||||
mipi_dsi_detach(lt->dsi);
|
||||
mipi_dsi_device_unregister(lt->dsi);
|
||||
}
|
||||
|
||||
static int lt8912_bridge_connector_init(struct drm_bridge *bridge)
|
||||
{
|
||||
int ret;
|
||||
struct lt8912 *lt = bridge_to_lt8912(bridge);
|
||||
struct drm_connector *connector = <->connector;
|
||||
|
||||
connector->polled = DRM_CONNECTOR_POLL_CONNECT |
|
||||
DRM_CONNECTOR_POLL_DISCONNECT;
|
||||
|
||||
ret = drm_connector_init(bridge->dev, connector,
|
||||
<8912_connector_funcs,
|
||||
lt->hdmi_port->type);
|
||||
if (ret)
|
||||
goto exit;
|
||||
|
||||
drm_connector_helper_add(connector, <8912_connector_helper_funcs);
|
||||
|
||||
connector->dpms = DRM_MODE_DPMS_OFF;
|
||||
drm_connector_attach_encoder(connector, bridge->encoder);
|
||||
|
||||
exit:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int lt8912_bridge_attach(struct drm_bridge *bridge,
|
||||
enum drm_bridge_attach_flags flags)
|
||||
{
|
||||
struct lt8912 *lt = bridge_to_lt8912(bridge);
|
||||
int ret;
|
||||
|
||||
if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
|
||||
ret = lt8912_bridge_connector_init(bridge);
|
||||
if (ret) {
|
||||
dev_err(lt->dev, "Failed to init bridge ! (%d)\n", ret);
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
|
||||
ret = lt8912_hard_power_on(lt);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = lt8912_soft_power_on(lt);
|
||||
if (ret)
|
||||
goto error;
|
||||
|
||||
ret = lt8912_attach_dsi(lt);
|
||||
if (ret)
|
||||
goto error;
|
||||
|
||||
lt->is_attached = true;
|
||||
|
||||
return 0;
|
||||
|
||||
error:
|
||||
lt8912_hard_power_off(lt);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void lt8912_bridge_detach(struct drm_bridge *bridge)
|
||||
{
|
||||
struct lt8912 *lt = bridge_to_lt8912(bridge);
|
||||
|
||||
if (lt->is_attached) {
|
||||
lt8912_detach_dsi(lt);
|
||||
lt8912_hard_power_off(lt);
|
||||
drm_connector_unregister(<->connector);
|
||||
drm_connector_cleanup(<->connector);
|
||||
}
|
||||
}
|
||||
|
||||
static enum drm_connector_status
|
||||
lt8912_bridge_detect(struct drm_bridge *bridge)
|
||||
{
|
||||
struct lt8912 *lt = bridge_to_lt8912(bridge);
|
||||
|
||||
if (lt->hdmi_port->ops & DRM_BRIDGE_OP_DETECT)
|
||||
return drm_bridge_detect(lt->hdmi_port);
|
||||
|
||||
return lt8912_check_cable_status(lt);
|
||||
}
|
||||
|
||||
static struct edid *lt8912_bridge_get_edid(struct drm_bridge *bridge,
|
||||
struct drm_connector *connector)
|
||||
{
|
||||
struct lt8912 *lt = bridge_to_lt8912(bridge);
|
||||
|
||||
/*
|
||||
* edid must be read through the ddc bus but it must be
|
||||
* given to the hdmi connector node.
|
||||
*/
|
||||
if (lt->hdmi_port->ops & DRM_BRIDGE_OP_EDID)
|
||||
return drm_bridge_get_edid(lt->hdmi_port, connector);
|
||||
|
||||
dev_warn(lt->dev, "The connected bridge does not supports DRM_BRIDGE_OP_EDID\n");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static const struct drm_bridge_funcs lt8912_bridge_funcs = {
|
||||
.attach = lt8912_bridge_attach,
|
||||
.detach = lt8912_bridge_detach,
|
||||
.mode_set = lt8912_bridge_mode_set,
|
||||
.enable = lt8912_bridge_enable,
|
||||
.detect = lt8912_bridge_detect,
|
||||
.get_edid = lt8912_bridge_get_edid,
|
||||
};
|
||||
|
||||
static int lt8912_parse_dt(struct lt8912 *lt)
|
||||
{
|
||||
struct gpio_desc *gp_reset;
|
||||
struct device *dev = lt->dev;
|
||||
int ret = 0;
|
||||
struct device_node *port_node;
|
||||
struct device_node *endpoint;
|
||||
|
||||
gp_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
|
||||
if (IS_ERR(gp_reset)) {
|
||||
ret = PTR_ERR(gp_reset);
|
||||
if (ret != -EPROBE_DEFER)
|
||||
dev_err(dev, "Failed to get reset gpio: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
lt->gp_reset = gp_reset;
|
||||
|
||||
endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1);
|
||||
if (IS_ERR(endpoint)) {
|
||||
ret = PTR_ERR(endpoint);
|
||||
goto end;
|
||||
}
|
||||
|
||||
lt->data_lanes = of_property_count_u32_elems(endpoint, "data-lanes");
|
||||
of_node_put(endpoint);
|
||||
|
||||
lt->host_node = of_graph_get_remote_node(dev->of_node, 0, -1);
|
||||
if (!lt->host_node) {
|
||||
dev_err(lt->dev, "%s: Failed to get remote port\n", __func__);
|
||||
ret = -ENODEV;
|
||||
goto end;
|
||||
}
|
||||
|
||||
port_node = of_graph_get_remote_node(dev->of_node, 1, -1);
|
||||
if (!port_node) {
|
||||
dev_err(lt->dev, "%s: Failed to get connector port\n", __func__);
|
||||
ret = -ENODEV;
|
||||
goto err_free_host_node;
|
||||
}
|
||||
|
||||
lt->hdmi_port = of_drm_find_bridge(port_node);
|
||||
if (IS_ERR(lt->hdmi_port)) {
|
||||
dev_err(lt->dev, "%s: Failed to get hdmi port\n", __func__);
|
||||
ret = PTR_ERR(lt->hdmi_port);
|
||||
of_node_put(lt->host_node);
|
||||
goto end;
|
||||
}
|
||||
|
||||
if (!of_device_is_compatible(port_node, "hdmi-connector")) {
|
||||
dev_err(lt->dev, "%s: Failed to get hdmi port\n", __func__);
|
||||
ret = -EINVAL;
|
||||
}
|
||||
|
||||
of_node_put(port_node);
|
||||
|
||||
end:
|
||||
return ret;
|
||||
|
||||
err_free_host_node:
|
||||
of_node_put(lt->host_node);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int lt8912_put_dt(struct lt8912 *lt)
|
||||
{
|
||||
of_node_put(lt->host_node);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int lt8912_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
static struct lt8912 *lt;
|
||||
int ret = 0;
|
||||
struct device *dev = &client->dev;
|
||||
|
||||
lt = devm_kzalloc(dev, sizeof(struct lt8912), GFP_KERNEL);
|
||||
if (!lt)
|
||||
return -ENOMEM;
|
||||
|
||||
lt->dev = dev;
|
||||
lt->i2c_client[0] = client;
|
||||
|
||||
ret = lt8912_parse_dt(lt);
|
||||
if (ret)
|
||||
goto err_dt_parse;
|
||||
|
||||
ret = lt8912_init_i2c(lt, client);
|
||||
if (ret)
|
||||
goto err_i2c;
|
||||
|
||||
i2c_set_clientdata(client, lt);
|
||||
|
||||
lt->bridge.funcs = <8912_bridge_funcs;
|
||||
lt->bridge.of_node = dev->of_node;
|
||||
lt->bridge.ops = (DRM_BRIDGE_OP_EDID |
|
||||
DRM_BRIDGE_OP_DETECT);
|
||||
|
||||
drm_bridge_add(<->bridge);
|
||||
|
||||
return 0;
|
||||
|
||||
err_i2c:
|
||||
lt8912_put_dt(lt);
|
||||
err_dt_parse:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int lt8912_remove(struct i2c_client *client)
|
||||
{
|
||||
struct lt8912 *lt = i2c_get_clientdata(client);
|
||||
|
||||
lt8912_bridge_detach(<->bridge);
|
||||
drm_bridge_remove(<->bridge);
|
||||
lt8912_free_i2c(lt);
|
||||
lt8912_put_dt(lt);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct of_device_id lt8912_dt_match[] = {
|
||||
{.compatible = "lontium,lt8912b"},
|
||||
{}
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, lt8912_dt_match);
|
||||
|
||||
static const struct i2c_device_id lt8912_id[] = {
|
||||
{"lt8912", 0},
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, lt8912_id);
|
||||
|
||||
static struct i2c_driver lt8912_i2c_driver = {
|
||||
.driver = {
|
||||
.name = "lt8912",
|
||||
.of_match_table = lt8912_dt_match,
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.probe = lt8912_probe,
|
||||
.remove = lt8912_remove,
|
||||
.id_table = lt8912_id,
|
||||
};
|
||||
module_i2c_driver(lt8912_i2c_driver);
|
||||
|
||||
MODULE_AUTHOR("Adrien Grassein <adrien.grassein@gmail.com>");
|
||||
MODULE_DESCRIPTION("lt8912 drm driver");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
Loading…
Reference in New Issue
Block a user