mirror of https://gitee.com/openkylin/linux.git
drm/bridge: Add Analogix anx6345 support
The ANX6345 is an ultra-low power DisplayPower/eDP transmitter designed for portable devices. This driver adds initial support for RGB to eDP mode, without HPD and interrupts. This is a configuration usually seen in eDP applications. Signed-off-by: Icenowy Zheng <icenowy@aosc.io> Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com> Signed-off-by: Torsten Duwe <duwe@suse.de> Signed-off-by: Maxime Ripard <maxime@cerno.tech> Link: https://patchwork.freedesktop.org/patch/msgid/20191107135220.590D968BFE@verein.lst.de
This commit is contained in:
Icenowy Zheng
Maxime Ripard
parent
dea73d6146
commit
6aa1926980
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@ -1,6 +1,18 @@
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# SPDX-License-Identifier: GPL-2.0-only
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config DRM_ANALOGIX_ANX6345
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tristate "Analogix ANX6345 bridge"
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select DRM_ANALOGIX_DP
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select DRM_KMS_HELPER
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select REGMAP_I2C
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help
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ANX6345 is an ultra-low Full-HD DisplayPort/eDP
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transmitter designed for portable devices. The
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ANX6345 transforms the LVTTL RGB output of an
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application processor to eDP or DisplayPort.
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config DRM_ANALOGIX_ANX78XX
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tristate "Analogix ANX78XX bridge"
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select DRM_ANALOGIX_DP
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select DRM_KMS_HELPER
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select REGMAP_I2C
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help
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@ -1,4 +1,5 @@
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# SPDX-License-Identifier: GPL-2.0-only
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analogix_dp-objs := analogix_dp_core.o analogix_dp_reg.o analogix-i2c-dptx.o
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obj-$(CONFIG_DRM_ANALOGIX_ANX6345) += analogix-anx6345.o
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obj-$(CONFIG_DRM_ANALOGIX_ANX78XX) += analogix-anx78xx.o
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obj-$(CONFIG_DRM_ANALOGIX_DP) += analogix_dp.o
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@ -0,0 +1,793 @@
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright(c) 2016, Analogix Semiconductor.
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* Copyright(c) 2017, Icenowy Zheng <icenowy@aosc.io>
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*
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* Based on anx7808 driver obtained from chromeos with copyright:
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* Copyright(c) 2013, Google Inc.
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*/
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/gpio/consumer.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of_platform.h>
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#include <linux/regmap.h>
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#include <linux/regulator/consumer.h>
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#include <linux/types.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_dp_helper.h>
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#include <drm/drm_edid.h>
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#include <drm/drm_of.h>
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#include <drm/drm_panel.h>
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#include <drm/drm_print.h>
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#include <drm/drm_probe_helper.h>
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#include "analogix-i2c-dptx.h"
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#include "analogix-i2c-txcommon.h"
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#define POLL_DELAY 50000 /* us */
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#define POLL_TIMEOUT 5000000 /* us */
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#define I2C_IDX_DPTX 0
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#define I2C_IDX_TXCOM 1
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static const u8 anx6345_i2c_addresses[] = {
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[I2C_IDX_DPTX] = 0x70,
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[I2C_IDX_TXCOM] = 0x72,
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};
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#define I2C_NUM_ADDRESSES ARRAY_SIZE(anx6345_i2c_addresses)
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struct anx6345 {
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struct drm_dp_aux aux;
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struct drm_bridge bridge;
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struct i2c_client *client;
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struct edid *edid;
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struct drm_connector connector;
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struct drm_dp_link link;
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struct drm_panel *panel;
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struct regulator *dvdd12;
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struct regulator *dvdd25;
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struct gpio_desc *gpiod_reset;
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struct mutex lock; /* protect EDID access */
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/* I2C Slave addresses of ANX6345 are mapped as DPTX and SYS */
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struct i2c_client *i2c_clients[I2C_NUM_ADDRESSES];
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struct regmap *map[I2C_NUM_ADDRESSES];
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u16 chipid;
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u8 dpcd[DP_RECEIVER_CAP_SIZE];
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bool powered;
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};
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static inline struct anx6345 *connector_to_anx6345(struct drm_connector *c)
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{
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return container_of(c, struct anx6345, connector);
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}
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static inline struct anx6345 *bridge_to_anx6345(struct drm_bridge *bridge)
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{
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return container_of(bridge, struct anx6345, bridge);
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}
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static int anx6345_set_bits(struct regmap *map, u8 reg, u8 mask)
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{
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return regmap_update_bits(map, reg, mask, mask);
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}
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static int anx6345_clear_bits(struct regmap *map, u8 reg, u8 mask)
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{
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return regmap_update_bits(map, reg, mask, 0);
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}
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static ssize_t anx6345_aux_transfer(struct drm_dp_aux *aux,
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struct drm_dp_aux_msg *msg)
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{
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struct anx6345 *anx6345 = container_of(aux, struct anx6345, aux);
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return anx_dp_aux_transfer(anx6345->map[I2C_IDX_DPTX], msg);
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}
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static int anx6345_dp_link_training(struct anx6345 *anx6345)
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{
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unsigned int value;
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u8 dp_bw;
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int err;
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err = anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM],
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SP_POWERDOWN_CTRL_REG,
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SP_TOTAL_PD);
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if (err)
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return err;
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err = drm_dp_dpcd_readb(&anx6345->aux, DP_MAX_LINK_RATE, &dp_bw);
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if (err < 0)
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return err;
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switch (dp_bw) {
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case DP_LINK_BW_1_62:
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case DP_LINK_BW_2_7:
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break;
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default:
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DRM_DEBUG_KMS("DP bandwidth (%#02x) not supported\n", dp_bw);
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return -EINVAL;
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}
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err = anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM], SP_VID_CTRL1_REG,
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SP_VIDEO_MUTE);
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if (err)
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return err;
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err = anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM],
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SP_VID_CTRL1_REG, SP_VIDEO_EN);
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if (err)
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return err;
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/* Get DPCD info */
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err = drm_dp_dpcd_read(&anx6345->aux, DP_DPCD_REV,
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&anx6345->dpcd, DP_RECEIVER_CAP_SIZE);
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if (err < 0) {
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DRM_ERROR("Failed to read DPCD: %d\n", err);
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return err;
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}
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/* Clear channel x SERDES power down */
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err = anx6345_clear_bits(anx6345->map[I2C_IDX_DPTX],
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SP_DP_ANALOG_POWER_DOWN_REG, SP_CH0_PD);
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if (err)
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return err;
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/* Check link capabilities */
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err = drm_dp_link_probe(&anx6345->aux, &anx6345->link);
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if (err < 0) {
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DRM_ERROR("Failed to probe link capabilities: %d\n", err);
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return err;
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}
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/* Power up the sink */
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err = drm_dp_link_power_up(&anx6345->aux, &anx6345->link);
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if (err < 0) {
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DRM_ERROR("Failed to power up DisplayPort link: %d\n", err);
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return err;
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}
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/* Possibly enable downspread on the sink */
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err = regmap_write(anx6345->map[I2C_IDX_DPTX],
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SP_DP_DOWNSPREAD_CTRL1_REG, 0);
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if (err)
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return err;
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if (anx6345->dpcd[DP_MAX_DOWNSPREAD] & DP_MAX_DOWNSPREAD_0_5) {
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DRM_DEBUG("Enable downspread on the sink\n");
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/* 4000PPM */
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err = regmap_write(anx6345->map[I2C_IDX_DPTX],
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SP_DP_DOWNSPREAD_CTRL1_REG, 8);
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if (err)
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return err;
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err = drm_dp_dpcd_writeb(&anx6345->aux, DP_DOWNSPREAD_CTRL,
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DP_SPREAD_AMP_0_5);
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if (err < 0)
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return err;
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} else {
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err = drm_dp_dpcd_writeb(&anx6345->aux, DP_DOWNSPREAD_CTRL, 0);
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if (err < 0)
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return err;
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}
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/* Set the lane count and the link rate on the sink */
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if (drm_dp_enhanced_frame_cap(anx6345->dpcd))
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err = anx6345_set_bits(anx6345->map[I2C_IDX_DPTX],
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SP_DP_SYSTEM_CTRL_BASE + 4,
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SP_ENHANCED_MODE);
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else
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err = anx6345_clear_bits(anx6345->map[I2C_IDX_DPTX],
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SP_DP_SYSTEM_CTRL_BASE + 4,
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SP_ENHANCED_MODE);
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if (err)
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return err;
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value = drm_dp_link_rate_to_bw_code(anx6345->link.rate);
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err = regmap_write(anx6345->map[I2C_IDX_DPTX],
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SP_DP_MAIN_LINK_BW_SET_REG, value);
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if (err)
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return err;
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err = regmap_write(anx6345->map[I2C_IDX_DPTX],
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SP_DP_LANE_COUNT_SET_REG, anx6345->link.num_lanes);
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if (err)
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return err;
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err = drm_dp_link_configure(&anx6345->aux, &anx6345->link);
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if (err < 0) {
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DRM_ERROR("Failed to configure DisplayPort link: %d\n", err);
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return err;
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}
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/* Start training on the source */
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err = regmap_write(anx6345->map[I2C_IDX_DPTX], SP_DP_LT_CTRL_REG,
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SP_LT_EN);
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if (err)
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return err;
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return regmap_read_poll_timeout(anx6345->map[I2C_IDX_DPTX],
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SP_DP_LT_CTRL_REG,
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value, !(value & SP_DP_LT_INPROGRESS),
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POLL_DELAY, POLL_TIMEOUT);
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}
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static int anx6345_tx_initialization(struct anx6345 *anx6345)
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{
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int err, i;
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/* FIXME: colordepth is hardcoded for now */
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err = regmap_write(anx6345->map[I2C_IDX_TXCOM], SP_VID_CTRL2_REG,
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SP_IN_BPC_6BIT << SP_IN_BPC_SHIFT);
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if (err)
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return err;
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err = regmap_write(anx6345->map[I2C_IDX_DPTX], SP_DP_PLL_CTRL_REG, 0);
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if (err)
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return err;
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err = regmap_write(anx6345->map[I2C_IDX_TXCOM],
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SP_ANALOG_DEBUG1_REG, 0);
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if (err)
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return err;
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err = regmap_write(anx6345->map[I2C_IDX_DPTX],
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SP_DP_LINK_DEBUG_CTRL_REG,
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SP_NEW_PRBS7 | SP_M_VID_DEBUG);
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if (err)
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return err;
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err = regmap_write(anx6345->map[I2C_IDX_DPTX],
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SP_DP_ANALOG_POWER_DOWN_REG, 0);
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if (err)
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return err;
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/* Force HPD */
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err = anx6345_set_bits(anx6345->map[I2C_IDX_DPTX],
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SP_DP_SYSTEM_CTRL_BASE + 3,
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SP_HPD_FORCE | SP_HPD_CTRL);
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if (err)
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return err;
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for (i = 0; i < 4; i++) {
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/* 4 lanes */
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err = regmap_write(anx6345->map[I2C_IDX_DPTX],
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SP_DP_LANE0_LT_CTRL_REG + i, 0);
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if (err)
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return err;
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}
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/* Reset AUX */
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err = anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM],
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SP_RESET_CTRL2_REG, SP_AUX_RST);
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if (err)
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return err;
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return anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM],
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SP_RESET_CTRL2_REG, SP_AUX_RST);
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}
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static void anx6345_poweron(struct anx6345 *anx6345)
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{
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int err;
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/* Ensure reset is asserted before starting power on sequence */
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gpiod_set_value_cansleep(anx6345->gpiod_reset, 1);
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usleep_range(1000, 2000);
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err = regulator_enable(anx6345->dvdd12);
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if (err) {
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DRM_ERROR("Failed to enable dvdd12 regulator: %d\n",
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err);
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return;
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}
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/* T1 - delay between VDD12 and VDD25 should be 0-2ms */
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usleep_range(1000, 2000);
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err = regulator_enable(anx6345->dvdd25);
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if (err) {
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DRM_ERROR("Failed to enable dvdd25 regulator: %d\n",
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err);
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return;
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}
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/* T2 - delay between RESETN and all power rail stable,
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* should be 2-5ms
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*/
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usleep_range(2000, 5000);
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gpiod_set_value_cansleep(anx6345->gpiod_reset, 0);
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/* Power on registers module */
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anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM], SP_POWERDOWN_CTRL_REG,
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SP_HDCP_PD | SP_AUDIO_PD | SP_VIDEO_PD | SP_LINK_PD);
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anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM], SP_POWERDOWN_CTRL_REG,
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SP_REGISTER_PD | SP_TOTAL_PD);
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if (anx6345->panel)
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drm_panel_prepare(anx6345->panel);
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anx6345->powered = true;
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}
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static void anx6345_poweroff(struct anx6345 *anx6345)
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{
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int err;
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gpiod_set_value_cansleep(anx6345->gpiod_reset, 1);
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usleep_range(1000, 2000);
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if (anx6345->panel)
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drm_panel_unprepare(anx6345->panel);
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err = regulator_disable(anx6345->dvdd25);
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if (err) {
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DRM_ERROR("Failed to disable dvdd25 regulator: %d\n",
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err);
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return;
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}
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usleep_range(5000, 10000);
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err = regulator_disable(anx6345->dvdd12);
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if (err) {
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DRM_ERROR("Failed to disable dvdd12 regulator: %d\n",
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err);
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return;
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}
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usleep_range(1000, 2000);
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anx6345->powered = false;
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}
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static int anx6345_start(struct anx6345 *anx6345)
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{
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int err;
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if (!anx6345->powered)
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anx6345_poweron(anx6345);
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/* Power on needed modules */
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err = anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM],
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SP_POWERDOWN_CTRL_REG,
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SP_VIDEO_PD | SP_LINK_PD);
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err = anx6345_tx_initialization(anx6345);
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if (err) {
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DRM_ERROR("Failed eDP transmitter initialization: %d\n", err);
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anx6345_poweroff(anx6345);
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return err;
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}
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err = anx6345_dp_link_training(anx6345);
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if (err) {
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DRM_ERROR("Failed link training: %d\n", err);
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anx6345_poweroff(anx6345);
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return err;
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}
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/*
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* This delay seems to help keep the hardware in a good state. Without
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* it, there are times where it fails silently.
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*/
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usleep_range(10000, 15000);
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return 0;
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}
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static int anx6345_config_dp_output(struct anx6345 *anx6345)
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{
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int err;
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err = anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM], SP_VID_CTRL1_REG,
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SP_VIDEO_MUTE);
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if (err)
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return err;
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/* Enable DP output */
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err = anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM], SP_VID_CTRL1_REG,
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SP_VIDEO_EN);
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if (err)
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return err;
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/* Force stream valid */
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return anx6345_set_bits(anx6345->map[I2C_IDX_DPTX],
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SP_DP_SYSTEM_CTRL_BASE + 3,
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SP_STRM_FORCE | SP_STRM_CTRL);
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}
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static int anx6345_get_downstream_info(struct anx6345 *anx6345)
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{
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u8 value;
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int err;
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|
||||
err = drm_dp_dpcd_readb(&anx6345->aux, DP_SINK_COUNT, &value);
|
||||
if (err < 0) {
|
||||
DRM_ERROR("Get sink count failed %d\n", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
if (!DP_GET_SINK_COUNT(value)) {
|
||||
DRM_ERROR("Downstream disconnected\n");
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int anx6345_get_modes(struct drm_connector *connector)
|
||||
{
|
||||
struct anx6345 *anx6345 = connector_to_anx6345(connector);
|
||||
int err, num_modes = 0;
|
||||
bool power_off = false;
|
||||
|
||||
mutex_lock(&anx6345->lock);
|
||||
|
||||
if (!anx6345->edid) {
|
||||
if (!anx6345->powered) {
|
||||
anx6345_poweron(anx6345);
|
||||
power_off = true;
|
||||
}
|
||||
|
||||
err = anx6345_get_downstream_info(anx6345);
|
||||
if (err) {
|
||||
DRM_ERROR("Failed to get downstream info: %d\n", err);
|
||||
goto unlock;
|
||||
}
|
||||
|
||||
anx6345->edid = drm_get_edid(connector, &anx6345->aux.ddc);
|
||||
if (!anx6345->edid)
|
||||
DRM_ERROR("Failed to read EDID from panel\n");
|
||||
|
||||
err = drm_connector_update_edid_property(connector,
|
||||
anx6345->edid);
|
||||
if (err) {
|
||||
DRM_ERROR("Failed to update EDID property: %d\n", err);
|
||||
goto unlock;
|
||||
}
|
||||
}
|
||||
|
||||
num_modes += drm_add_edid_modes(connector, anx6345->edid);
|
||||
|
||||
unlock:
|
||||
if (power_off)
|
||||
anx6345_poweroff(anx6345);
|
||||
|
||||
mutex_unlock(&anx6345->lock);
|
||||
|
||||
if (!num_modes && anx6345->panel)
|
||||
num_modes += drm_panel_get_modes(anx6345->panel);
|
||||
|
||||
return num_modes;
|
||||
}
|
||||
|
||||
static const struct drm_connector_helper_funcs anx6345_connector_helper_funcs = {
|
||||
.get_modes = anx6345_get_modes,
|
||||
};
|
||||
|
||||
static void
|
||||
anx6345_connector_destroy(struct drm_connector *connector)
|
||||
{
|
||||
struct anx6345 *anx6345 = connector_to_anx6345(connector);
|
||||
|
||||
if (anx6345->panel)
|
||||
drm_panel_detach(anx6345->panel);
|
||||
drm_connector_cleanup(connector);
|
||||
}
|
||||
|
||||
static const struct drm_connector_funcs anx6345_connector_funcs = {
|
||||
.fill_modes = drm_helper_probe_single_connector_modes,
|
||||
.destroy = anx6345_connector_destroy,
|
||||
.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 anx6345_bridge_attach(struct drm_bridge *bridge)
|
||||
{
|
||||
struct anx6345 *anx6345 = bridge_to_anx6345(bridge);
|
||||
int err;
|
||||
|
||||
if (!bridge->encoder) {
|
||||
DRM_ERROR("Parent encoder object not found");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
/* Register aux channel */
|
||||
anx6345->aux.name = "DP-AUX";
|
||||
anx6345->aux.dev = &anx6345->client->dev;
|
||||
anx6345->aux.transfer = anx6345_aux_transfer;
|
||||
|
||||
err = drm_dp_aux_register(&anx6345->aux);
|
||||
if (err < 0) {
|
||||
DRM_ERROR("Failed to register aux channel: %d\n", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
err = drm_connector_init(bridge->dev, &anx6345->connector,
|
||||
&anx6345_connector_funcs,
|
||||
DRM_MODE_CONNECTOR_eDP);
|
||||
if (err) {
|
||||
DRM_ERROR("Failed to initialize connector: %d\n", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
drm_connector_helper_add(&anx6345->connector,
|
||||
&anx6345_connector_helper_funcs);
|
||||
|
||||
err = drm_connector_register(&anx6345->connector);
|
||||
if (err) {
|
||||
DRM_ERROR("Failed to register connector: %d\n", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
anx6345->connector.polled = DRM_CONNECTOR_POLL_HPD;
|
||||
|
||||
err = drm_connector_attach_encoder(&anx6345->connector,
|
||||
bridge->encoder);
|
||||
if (err) {
|
||||
DRM_ERROR("Failed to link up connector to encoder: %d\n", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
if (anx6345->panel) {
|
||||
err = drm_panel_attach(anx6345->panel, &anx6345->connector);
|
||||
if (err) {
|
||||
DRM_ERROR("Failed to attach panel: %d\n", err);
|
||||
return err;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static enum drm_mode_status
|
||||
anx6345_bridge_mode_valid(struct drm_bridge *bridge,
|
||||
const struct drm_display_mode *mode)
|
||||
{
|
||||
if (mode->flags & DRM_MODE_FLAG_INTERLACE)
|
||||
return MODE_NO_INTERLACE;
|
||||
|
||||
/* Max 1200p at 5.4 Ghz, one lane */
|
||||
if (mode->clock > 154000)
|
||||
return MODE_CLOCK_HIGH;
|
||||
|
||||
return MODE_OK;
|
||||
}
|
||||
|
||||
static void anx6345_bridge_disable(struct drm_bridge *bridge)
|
||||
{
|
||||
struct anx6345 *anx6345 = bridge_to_anx6345(bridge);
|
||||
|
||||
/* Power off all modules except configuration registers access */
|
||||
anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM], SP_POWERDOWN_CTRL_REG,
|
||||
SP_HDCP_PD | SP_AUDIO_PD | SP_VIDEO_PD | SP_LINK_PD);
|
||||
if (anx6345->panel)
|
||||
drm_panel_disable(anx6345->panel);
|
||||
|
||||
if (anx6345->powered)
|
||||
anx6345_poweroff(anx6345);
|
||||
}
|
||||
|
||||
static void anx6345_bridge_enable(struct drm_bridge *bridge)
|
||||
{
|
||||
struct anx6345 *anx6345 = bridge_to_anx6345(bridge);
|
||||
int err;
|
||||
|
||||
if (anx6345->panel)
|
||||
drm_panel_enable(anx6345->panel);
|
||||
|
||||
err = anx6345_start(anx6345);
|
||||
if (err) {
|
||||
DRM_ERROR("Failed to initialize: %d\n", err);
|
||||
return;
|
||||
}
|
||||
|
||||
err = anx6345_config_dp_output(anx6345);
|
||||
if (err)
|
||||
DRM_ERROR("Failed to enable DP output: %d\n", err);
|
||||
}
|
||||
|
||||
static const struct drm_bridge_funcs anx6345_bridge_funcs = {
|
||||
.attach = anx6345_bridge_attach,
|
||||
.mode_valid = anx6345_bridge_mode_valid,
|
||||
.disable = anx6345_bridge_disable,
|
||||
.enable = anx6345_bridge_enable,
|
||||
};
|
||||
|
||||
static void unregister_i2c_dummy_clients(struct anx6345 *anx6345)
|
||||
{
|
||||
unsigned int i;
|
||||
|
||||
for (i = 1; i < ARRAY_SIZE(anx6345->i2c_clients); i++)
|
||||
if (anx6345->i2c_clients[i] &&
|
||||
anx6345->i2c_clients[i]->addr != anx6345->client->addr)
|
||||
i2c_unregister_device(anx6345->i2c_clients[i]);
|
||||
}
|
||||
|
||||
static const struct regmap_config anx6345_regmap_config = {
|
||||
.reg_bits = 8,
|
||||
.val_bits = 8,
|
||||
.max_register = 0xff,
|
||||
.cache_type = REGCACHE_NONE,
|
||||
};
|
||||
|
||||
static const u16 anx6345_chipid_list[] = {
|
||||
0x6345,
|
||||
};
|
||||
|
||||
static bool anx6345_get_chip_id(struct anx6345 *anx6345)
|
||||
{
|
||||
unsigned int i, idl, idh, version;
|
||||
|
||||
if (regmap_read(anx6345->map[I2C_IDX_TXCOM], SP_DEVICE_IDL_REG, &idl))
|
||||
return false;
|
||||
|
||||
if (regmap_read(anx6345->map[I2C_IDX_TXCOM], SP_DEVICE_IDH_REG, &idh))
|
||||
return false;
|
||||
|
||||
anx6345->chipid = (u8)idl | ((u8)idh << 8);
|
||||
|
||||
if (regmap_read(anx6345->map[I2C_IDX_TXCOM], SP_DEVICE_VERSION_REG,
|
||||
&version))
|
||||
return false;
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(anx6345_chipid_list); i++) {
|
||||
if (anx6345->chipid == anx6345_chipid_list[i]) {
|
||||
DRM_INFO("Found ANX%x (ver. %d) eDP Transmitter\n",
|
||||
anx6345->chipid, version);
|
||||
return true;
|
||||
}
|
||||
}
|
||||
|
||||
DRM_ERROR("ANX%x (ver. %d) not supported by this driver\n",
|
||||
anx6345->chipid, version);
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
static int anx6345_i2c_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
struct anx6345 *anx6345;
|
||||
struct device *dev;
|
||||
int i, err;
|
||||
|
||||
anx6345 = devm_kzalloc(&client->dev, sizeof(*anx6345), GFP_KERNEL);
|
||||
if (!anx6345)
|
||||
return -ENOMEM;
|
||||
|
||||
mutex_init(&anx6345->lock);
|
||||
|
||||
anx6345->bridge.of_node = client->dev.of_node;
|
||||
|
||||
anx6345->client = client;
|
||||
i2c_set_clientdata(client, anx6345);
|
||||
|
||||
dev = &anx6345->client->dev;
|
||||
|
||||
err = drm_of_find_panel_or_bridge(client->dev.of_node, 1, 0,
|
||||
&anx6345->panel, NULL);
|
||||
if (err == -EPROBE_DEFER)
|
||||
return err;
|
||||
|
||||
if (err)
|
||||
DRM_DEBUG("No panel found\n");
|
||||
|
||||
/* 1.2V digital core power regulator */
|
||||
anx6345->dvdd12 = devm_regulator_get(dev, "dvdd12-supply");
|
||||
if (IS_ERR(anx6345->dvdd12)) {
|
||||
DRM_ERROR("dvdd12-supply not found\n");
|
||||
return PTR_ERR(anx6345->dvdd12);
|
||||
}
|
||||
|
||||
/* 2.5V digital core power regulator */
|
||||
anx6345->dvdd25 = devm_regulator_get(dev, "dvdd25-supply");
|
||||
if (IS_ERR(anx6345->dvdd25)) {
|
||||
DRM_ERROR("dvdd25-supply not found\n");
|
||||
return PTR_ERR(anx6345->dvdd25);
|
||||
}
|
||||
|
||||
/* GPIO for chip reset */
|
||||
anx6345->gpiod_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
|
||||
if (IS_ERR(anx6345->gpiod_reset)) {
|
||||
DRM_ERROR("Reset gpio not found\n");
|
||||
return PTR_ERR(anx6345->gpiod_reset);
|
||||
}
|
||||
|
||||
/* Map slave addresses of ANX6345 */
|
||||
for (i = 0; i < I2C_NUM_ADDRESSES; i++) {
|
||||
if (anx6345_i2c_addresses[i] >> 1 != client->addr)
|
||||
anx6345->i2c_clients[i] = i2c_new_dummy(client->adapter,
|
||||
anx6345_i2c_addresses[i] >> 1);
|
||||
else
|
||||
anx6345->i2c_clients[i] = client;
|
||||
|
||||
if (!anx6345->i2c_clients[i]) {
|
||||
err = -ENOMEM;
|
||||
DRM_ERROR("Failed to reserve I2C bus %02x\n",
|
||||
anx6345_i2c_addresses[i]);
|
||||
goto err_unregister_i2c;
|
||||
}
|
||||
|
||||
anx6345->map[i] = devm_regmap_init_i2c(anx6345->i2c_clients[i],
|
||||
&anx6345_regmap_config);
|
||||
if (IS_ERR(anx6345->map[i])) {
|
||||
err = PTR_ERR(anx6345->map[i]);
|
||||
DRM_ERROR("Failed regmap initialization %02x\n",
|
||||
anx6345_i2c_addresses[i]);
|
||||
goto err_unregister_i2c;
|
||||
}
|
||||
}
|
||||
|
||||
/* Look for supported chip ID */
|
||||
anx6345_poweron(anx6345);
|
||||
if (anx6345_get_chip_id(anx6345)) {
|
||||
anx6345->bridge.funcs = &anx6345_bridge_funcs;
|
||||
drm_bridge_add(&anx6345->bridge);
|
||||
|
||||
return 0;
|
||||
} else {
|
||||
anx6345_poweroff(anx6345);
|
||||
err = -ENODEV;
|
||||
}
|
||||
|
||||
err_unregister_i2c:
|
||||
unregister_i2c_dummy_clients(anx6345);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int anx6345_i2c_remove(struct i2c_client *client)
|
||||
{
|
||||
struct anx6345 *anx6345 = i2c_get_clientdata(client);
|
||||
|
||||
drm_bridge_remove(&anx6345->bridge);
|
||||
|
||||
unregister_i2c_dummy_clients(anx6345);
|
||||
|
||||
kfree(anx6345->edid);
|
||||
|
||||
mutex_destroy(&anx6345->lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct i2c_device_id anx6345_id[] = {
|
||||
{ "anx6345", 0 },
|
||||
{ /* sentinel */ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, anx6345_id);
|
||||
|
||||
static const struct of_device_id anx6345_match_table[] = {
|
||||
{ .compatible = "analogix,anx6345", },
|
||||
{ /* sentinel */ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, anx6345_match_table);
|
||||
|
||||
static struct i2c_driver anx6345_driver = {
|
||||
.driver = {
|
||||
.name = "anx6345",
|
||||
.of_match_table = of_match_ptr(anx6345_match_table),
|
||||
},
|
||||
.probe = anx6345_i2c_probe,
|
||||
.remove = anx6345_i2c_remove,
|
||||
.id_table = anx6345_id,
|
||||
};
|
||||
module_i2c_driver(anx6345_driver);
|
||||
|
||||
MODULE_DESCRIPTION("ANX6345 eDP Transmitter driver");
|
||||
MODULE_AUTHOR("Icenowy Zheng <icenowy@aosc.io>");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
Loading…
Reference in New Issue