Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * NXP PTN3460 DP/LVDS bridge driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2013 Google, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/gpio/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <drm/drm_atomic_helper.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <drm/drm_bridge.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <drm/drm_crtc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <drm/drm_edid.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <drm/drm_of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <drm/drm_panel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <drm/drm_print.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <drm/drm_probe_helper.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #define PTN3460_EDID_ADDR			0x0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #define PTN3460_EDID_EMULATION_ADDR		0x84
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define PTN3460_EDID_ENABLE_EMULATION		0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define PTN3460_EDID_EMULATION_SELECTION	1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #define PTN3460_EDID_SRAM_LOAD_ADDR		0x85
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) struct ptn3460_bridge {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	struct drm_connector connector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	struct drm_bridge bridge;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	struct drm_bridge *panel_bridge;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	struct gpio_desc *gpio_pd_n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	struct gpio_desc *gpio_rst_n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	u32 edid_emulation;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	bool enabled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) static inline struct ptn3460_bridge *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 		bridge_to_ptn3460(struct drm_bridge *bridge)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	return container_of(bridge, struct ptn3460_bridge, bridge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) static inline struct ptn3460_bridge *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 		connector_to_ptn3460(struct drm_connector *connector)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	return container_of(connector, struct ptn3460_bridge, connector);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) static int ptn3460_read_bytes(struct ptn3460_bridge *ptn_bridge, char addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 		u8 *buf, int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	ret = i2c_master_send(ptn_bridge->client, &addr, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	if (ret <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		DRM_ERROR("Failed to send i2c command, ret=%d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	ret = i2c_master_recv(ptn_bridge->client, buf, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	if (ret <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		DRM_ERROR("Failed to recv i2c data, ret=%d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) static int ptn3460_write_byte(struct ptn3460_bridge *ptn_bridge, char addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 		char val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	char buf[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	buf[0] = addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	buf[1] = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	ret = i2c_master_send(ptn_bridge->client, buf, ARRAY_SIZE(buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	if (ret <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		DRM_ERROR("Failed to send i2c command, ret=%d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) static int ptn3460_select_edid(struct ptn3460_bridge *ptn_bridge)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	char val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	/* Load the selected edid into SRAM (accessed at PTN3460_EDID_ADDR) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	ret = ptn3460_write_byte(ptn_bridge, PTN3460_EDID_SRAM_LOAD_ADDR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 			ptn_bridge->edid_emulation);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		DRM_ERROR("Failed to transfer EDID to sram, ret=%d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	/* Enable EDID emulation and select the desired EDID */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	val = 1 << PTN3460_EDID_ENABLE_EMULATION |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		ptn_bridge->edid_emulation << PTN3460_EDID_EMULATION_SELECTION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	ret = ptn3460_write_byte(ptn_bridge, PTN3460_EDID_EMULATION_ADDR, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		DRM_ERROR("Failed to write EDID value, ret=%d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static void ptn3460_pre_enable(struct drm_bridge *bridge)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	if (ptn_bridge->enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	gpiod_set_value(ptn_bridge->gpio_pd_n, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	gpiod_set_value(ptn_bridge->gpio_rst_n, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	usleep_range(10, 20);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	gpiod_set_value(ptn_bridge->gpio_rst_n, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	 * There's a bug in the PTN chip where it falsely asserts hotplug before
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	 * it is fully functional. We're forced to wait for the maximum start up
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	 * time specified in the chip's datasheet to make sure we're really up.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	msleep(90);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	ret = ptn3460_select_edid(ptn_bridge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		DRM_ERROR("Select EDID failed ret=%d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	ptn_bridge->enabled = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) static void ptn3460_disable(struct drm_bridge *bridge)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	if (!ptn_bridge->enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	ptn_bridge->enabled = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	gpiod_set_value(ptn_bridge->gpio_rst_n, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	gpiod_set_value(ptn_bridge->gpio_pd_n, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) static struct edid *ptn3460_get_edid(struct drm_bridge *bridge,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 				     struct drm_connector *connector)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	bool power_off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	u8 *edid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	power_off = !ptn_bridge->enabled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	ptn3460_pre_enable(&ptn_bridge->bridge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	edid = kmalloc(EDID_LENGTH, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	if (!edid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		DRM_ERROR("Failed to allocate EDID\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	ret = ptn3460_read_bytes(ptn_bridge, PTN3460_EDID_ADDR, edid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 				 EDID_LENGTH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		kfree(edid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		edid = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	if (power_off)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		ptn3460_disable(&ptn_bridge->bridge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	return (struct edid *)edid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) static int ptn3460_connector_get_modes(struct drm_connector *connector)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	struct ptn3460_bridge *ptn_bridge = connector_to_ptn3460(connector);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	struct edid *edid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	int num_modes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	edid = ptn3460_get_edid(&ptn_bridge->bridge, connector);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	drm_connector_update_edid_property(connector, edid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	num_modes = drm_add_edid_modes(connector, edid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	kfree(edid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	return num_modes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) static const struct drm_connector_helper_funcs ptn3460_connector_helper_funcs = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	.get_modes = ptn3460_connector_get_modes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) static const struct drm_connector_funcs ptn3460_connector_funcs = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	.fill_modes = drm_helper_probe_single_connector_modes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	.destroy = drm_connector_cleanup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	.reset = drm_atomic_helper_connector_reset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) static int ptn3460_bridge_attach(struct drm_bridge *bridge,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 				 enum drm_bridge_attach_flags flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	/* Let this driver create connector if requested */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	ret = drm_bridge_attach(bridge->encoder, ptn_bridge->panel_bridge,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 				bridge, flags | DRM_BRIDGE_ATTACH_NO_CONNECTOR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	if (!bridge->encoder) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		DRM_ERROR("Parent encoder object not found");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	ptn_bridge->connector.polled = DRM_CONNECTOR_POLL_HPD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	ret = drm_connector_init(bridge->dev, &ptn_bridge->connector,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 			&ptn3460_connector_funcs, DRM_MODE_CONNECTOR_LVDS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 		DRM_ERROR("Failed to initialize connector with drm\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	drm_connector_helper_add(&ptn_bridge->connector,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 					&ptn3460_connector_helper_funcs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	drm_connector_register(&ptn_bridge->connector);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	drm_connector_attach_encoder(&ptn_bridge->connector,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 							bridge->encoder);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	drm_helper_hpd_irq_event(ptn_bridge->connector.dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) static const struct drm_bridge_funcs ptn3460_bridge_funcs = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	.pre_enable = ptn3460_pre_enable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	.disable = ptn3460_disable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	.attach = ptn3460_bridge_attach,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	.get_edid = ptn3460_get_edid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) static int ptn3460_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 				const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	struct device *dev = &client->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	struct ptn3460_bridge *ptn_bridge;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	struct drm_bridge *panel_bridge;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	struct drm_panel *panel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	ptn_bridge = devm_kzalloc(dev, sizeof(*ptn_bridge), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	if (!ptn_bridge) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &panel, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	panel_bridge = devm_drm_panel_bridge_add(dev, panel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	if (IS_ERR(panel_bridge))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		return PTR_ERR(panel_bridge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	ptn_bridge->panel_bridge = panel_bridge;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	ptn_bridge->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	ptn_bridge->gpio_pd_n = devm_gpiod_get(&client->dev, "powerdown",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 					       GPIOD_OUT_HIGH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	if (IS_ERR(ptn_bridge->gpio_pd_n)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		ret = PTR_ERR(ptn_bridge->gpio_pd_n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 		dev_err(dev, "cannot get gpio_pd_n %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	 * Request the reset pin low to avoid the bridge being
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	 * initialized prematurely
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	ptn_bridge->gpio_rst_n = devm_gpiod_get(&client->dev, "reset",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 						GPIOD_OUT_LOW);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	if (IS_ERR(ptn_bridge->gpio_rst_n)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 		ret = PTR_ERR(ptn_bridge->gpio_rst_n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 		DRM_ERROR("cannot get gpio_rst_n %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	ret = of_property_read_u32(dev->of_node, "edid-emulation",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 			&ptn_bridge->edid_emulation);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 		dev_err(dev, "Can't read EDID emulation value\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	ptn_bridge->bridge.funcs = &ptn3460_bridge_funcs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	ptn_bridge->bridge.ops = DRM_BRIDGE_OP_EDID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	ptn_bridge->bridge.type = DRM_MODE_CONNECTOR_LVDS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	ptn_bridge->bridge.of_node = dev->of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	drm_bridge_add(&ptn_bridge->bridge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	i2c_set_clientdata(client, ptn_bridge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) static int ptn3460_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	struct ptn3460_bridge *ptn_bridge = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	drm_bridge_remove(&ptn_bridge->bridge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) static const struct i2c_device_id ptn3460_i2c_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	{"ptn3460", 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	{},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) MODULE_DEVICE_TABLE(i2c, ptn3460_i2c_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) static const struct of_device_id ptn3460_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	{ .compatible = "nxp,ptn3460" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	{},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) MODULE_DEVICE_TABLE(of, ptn3460_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) static struct i2c_driver ptn3460_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	.id_table	= ptn3460_i2c_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	.probe		= ptn3460_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 	.remove		= ptn3460_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	.driver		= {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 		.name	= "nxp,ptn3460",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 		.of_match_table = ptn3460_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) module_i2c_driver(ptn3460_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) MODULE_AUTHOR("Sean Paul <seanpaul@chromium.org>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) MODULE_DESCRIPTION("NXP ptn3460 eDP-LVDS converter driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) MODULE_LICENSE("GPL v2");