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linux-zen-server/drivers/gpu/drm/bridge/imx/imx8qxp-ldb-drv.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2020 NXP
*/
#include <linux/clk.h>
#include <linux/media-bus-format.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_graph.h>
#include <linux/phy/phy.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <drm/drm_atomic_state_helper.h>
#include <drm/drm_bridge.h>
#include <drm/drm_connector.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_of.h>
#include <drm/drm_print.h>
#include "imx-ldb-helper.h"
#define LDB_CH_SEL BIT(28)
#define SS_CTRL 0x20
#define CH_HSYNC_M(id) BIT(0 + ((id) * 2))
#define CH_VSYNC_M(id) BIT(1 + ((id) * 2))
#define CH_PHSYNC(id) BIT(0 + ((id) * 2))
#define CH_PVSYNC(id) BIT(1 + ((id) * 2))
#define DRIVER_NAME "imx8qxp-ldb"
struct imx8qxp_ldb_channel {
struct ldb_channel base;
struct phy *phy;
unsigned int di_id;
};
struct imx8qxp_ldb {
struct ldb base;
struct device *dev;
struct imx8qxp_ldb_channel channel[MAX_LDB_CHAN_NUM];
struct clk *clk_pixel;
struct clk *clk_bypass;
struct drm_bridge *companion;
int active_chno;
};
static inline struct imx8qxp_ldb_channel *
base_to_imx8qxp_ldb_channel(struct ldb_channel *base)
{
return container_of(base, struct imx8qxp_ldb_channel, base);
}
static inline struct imx8qxp_ldb *base_to_imx8qxp_ldb(struct ldb *base)
{
return container_of(base, struct imx8qxp_ldb, base);
}
static void imx8qxp_ldb_set_phy_cfg(struct imx8qxp_ldb *imx8qxp_ldb,
unsigned long di_clk, bool is_split,
struct phy_configure_opts_lvds *phy_cfg)
{
phy_cfg->bits_per_lane_and_dclk_cycle = 7;
phy_cfg->lanes = 4;
if (is_split) {
phy_cfg->differential_clk_rate = di_clk / 2;
phy_cfg->is_slave = !imx8qxp_ldb->companion;
} else {
phy_cfg->differential_clk_rate = di_clk;
phy_cfg->is_slave = false;
}
}
static int
imx8qxp_ldb_bridge_atomic_check(struct drm_bridge *bridge,
struct drm_bridge_state *bridge_state,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
struct ldb_channel *ldb_ch = bridge->driver_private;
struct ldb *ldb = ldb_ch->ldb;
struct imx8qxp_ldb_channel *imx8qxp_ldb_ch =
base_to_imx8qxp_ldb_channel(ldb_ch);
struct imx8qxp_ldb *imx8qxp_ldb = base_to_imx8qxp_ldb(ldb);
struct drm_bridge *companion = imx8qxp_ldb->companion;
struct drm_display_mode *adj = &crtc_state->adjusted_mode;
unsigned long di_clk = adj->clock * 1000;
bool is_split = ldb_channel_is_split_link(ldb_ch);
union phy_configure_opts opts = { };
struct phy_configure_opts_lvds *phy_cfg = &opts.lvds;
int ret;
ret = ldb_bridge_atomic_check_helper(bridge, bridge_state,
crtc_state, conn_state);
if (ret)
return ret;
imx8qxp_ldb_set_phy_cfg(imx8qxp_ldb, di_clk, is_split, phy_cfg);
ret = phy_validate(imx8qxp_ldb_ch->phy, PHY_MODE_LVDS, 0, &opts);
if (ret < 0) {
DRM_DEV_DEBUG_DRIVER(imx8qxp_ldb->dev,
"failed to validate PHY: %d\n", ret);
return ret;
}
if (is_split && companion) {
ret = companion->funcs->atomic_check(companion,
bridge_state, crtc_state, conn_state);
if (ret)
return ret;
}
return ret;
}
static void
imx8qxp_ldb_bridge_mode_set(struct drm_bridge *bridge,
const struct drm_display_mode *mode,
const struct drm_display_mode *adjusted_mode)
{
struct ldb_channel *ldb_ch = bridge->driver_private;
struct ldb_channel *companion_ldb_ch;
struct ldb *ldb = ldb_ch->ldb;
struct imx8qxp_ldb_channel *imx8qxp_ldb_ch =
base_to_imx8qxp_ldb_channel(ldb_ch);
struct imx8qxp_ldb *imx8qxp_ldb = base_to_imx8qxp_ldb(ldb);
struct drm_bridge *companion = imx8qxp_ldb->companion;
struct device *dev = imx8qxp_ldb->dev;
unsigned long di_clk = adjusted_mode->clock * 1000;
bool is_split = ldb_channel_is_split_link(ldb_ch);
union phy_configure_opts opts = { };
struct phy_configure_opts_lvds *phy_cfg = &opts.lvds;
u32 chno = ldb_ch->chno;
int ret;
ret = pm_runtime_get_sync(dev);
if (ret < 0)
DRM_DEV_ERROR(dev, "failed to get runtime PM sync: %d\n", ret);
ret = phy_init(imx8qxp_ldb_ch->phy);
if (ret < 0)
DRM_DEV_ERROR(dev, "failed to initialize PHY: %d\n", ret);
ret = phy_set_mode(imx8qxp_ldb_ch->phy, PHY_MODE_LVDS);
if (ret < 0)
DRM_DEV_ERROR(dev, "failed to set PHY mode: %d\n", ret);
if (is_split && companion) {
companion_ldb_ch = bridge_to_ldb_ch(companion);
companion_ldb_ch->in_bus_format = ldb_ch->in_bus_format;
companion_ldb_ch->out_bus_format = ldb_ch->out_bus_format;
}
clk_set_rate(imx8qxp_ldb->clk_bypass, di_clk);
clk_set_rate(imx8qxp_ldb->clk_pixel, di_clk);
imx8qxp_ldb_set_phy_cfg(imx8qxp_ldb, di_clk, is_split, phy_cfg);
ret = phy_configure(imx8qxp_ldb_ch->phy, &opts);
if (ret < 0)
DRM_DEV_ERROR(dev, "failed to configure PHY: %d\n", ret);
if (chno == 0)
ldb->ldb_ctrl &= ~LDB_CH_SEL;
else
ldb->ldb_ctrl |= LDB_CH_SEL;
/* input VSYNC signal from pixel link is active low */
if (imx8qxp_ldb_ch->di_id == 0)
ldb->ldb_ctrl |= LDB_DI0_VS_POL_ACT_LOW;
else
ldb->ldb_ctrl |= LDB_DI1_VS_POL_ACT_LOW;
/*
* For split mode, settle input VSYNC signal polarity and
* channel selection down early.
*/
if (is_split)
regmap_write(ldb->regmap, ldb->ctrl_reg, ldb->ldb_ctrl);
ldb_bridge_mode_set_helper(bridge, mode, adjusted_mode);
if (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC)
regmap_update_bits(ldb->regmap, SS_CTRL, CH_VSYNC_M(chno), 0);
else if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
regmap_update_bits(ldb->regmap, SS_CTRL,
CH_VSYNC_M(chno), CH_PVSYNC(chno));
if (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC)
regmap_update_bits(ldb->regmap, SS_CTRL, CH_HSYNC_M(chno), 0);
else if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
regmap_update_bits(ldb->regmap, SS_CTRL,
CH_HSYNC_M(chno), CH_PHSYNC(chno));
if (is_split && companion)
companion->funcs->mode_set(companion, mode, adjusted_mode);
}
static void
imx8qxp_ldb_bridge_atomic_pre_enable(struct drm_bridge *bridge,
struct drm_bridge_state *old_bridge_state)
{
struct ldb_channel *ldb_ch = bridge->driver_private;
struct ldb *ldb = ldb_ch->ldb;
struct imx8qxp_ldb *imx8qxp_ldb = base_to_imx8qxp_ldb(ldb);
struct drm_bridge *companion = imx8qxp_ldb->companion;
bool is_split = ldb_channel_is_split_link(ldb_ch);
clk_prepare_enable(imx8qxp_ldb->clk_pixel);
clk_prepare_enable(imx8qxp_ldb->clk_bypass);
if (is_split && companion)
companion->funcs->atomic_pre_enable(companion, old_bridge_state);
}
static void
imx8qxp_ldb_bridge_atomic_enable(struct drm_bridge *bridge,
struct drm_bridge_state *old_bridge_state)
{
struct ldb_channel *ldb_ch = bridge->driver_private;
struct ldb *ldb = ldb_ch->ldb;
struct imx8qxp_ldb_channel *imx8qxp_ldb_ch =
base_to_imx8qxp_ldb_channel(ldb_ch);
struct imx8qxp_ldb *imx8qxp_ldb = base_to_imx8qxp_ldb(ldb);
struct drm_bridge *companion = imx8qxp_ldb->companion;
struct device *dev = imx8qxp_ldb->dev;
bool is_split = ldb_channel_is_split_link(ldb_ch);
int ret;
if (ldb_ch->chno == 0 || is_split) {
ldb->ldb_ctrl &= ~LDB_CH0_MODE_EN_MASK;
ldb->ldb_ctrl |= imx8qxp_ldb_ch->di_id == 0 ?
LDB_CH0_MODE_EN_TO_DI0 : LDB_CH0_MODE_EN_TO_DI1;
}
if (ldb_ch->chno == 1 || is_split) {
ldb->ldb_ctrl &= ~LDB_CH1_MODE_EN_MASK;
ldb->ldb_ctrl |= imx8qxp_ldb_ch->di_id == 0 ?
LDB_CH1_MODE_EN_TO_DI0 : LDB_CH1_MODE_EN_TO_DI1;
}
ldb_bridge_enable_helper(bridge);
ret = phy_power_on(imx8qxp_ldb_ch->phy);
if (ret)
DRM_DEV_ERROR(dev, "failed to power on PHY: %d\n", ret);
if (is_split && companion)
companion->funcs->atomic_enable(companion, old_bridge_state);
}
static void
imx8qxp_ldb_bridge_atomic_disable(struct drm_bridge *bridge,
struct drm_bridge_state *old_bridge_state)
{
struct ldb_channel *ldb_ch = bridge->driver_private;
struct ldb *ldb = ldb_ch->ldb;
struct imx8qxp_ldb_channel *imx8qxp_ldb_ch =
base_to_imx8qxp_ldb_channel(ldb_ch);
struct imx8qxp_ldb *imx8qxp_ldb = base_to_imx8qxp_ldb(ldb);
struct drm_bridge *companion = imx8qxp_ldb->companion;
struct device *dev = imx8qxp_ldb->dev;
bool is_split = ldb_channel_is_split_link(ldb_ch);
int ret;
ret = phy_power_off(imx8qxp_ldb_ch->phy);
if (ret)
DRM_DEV_ERROR(dev, "failed to power off PHY: %d\n", ret);
ret = phy_exit(imx8qxp_ldb_ch->phy);
if (ret < 0)
DRM_DEV_ERROR(dev, "failed to teardown PHY: %d\n", ret);
ldb_bridge_disable_helper(bridge);
clk_disable_unprepare(imx8qxp_ldb->clk_bypass);
clk_disable_unprepare(imx8qxp_ldb->clk_pixel);
if (is_split && companion)
companion->funcs->atomic_disable(companion, old_bridge_state);
ret = pm_runtime_put(dev);
if (ret < 0)
DRM_DEV_ERROR(dev, "failed to put runtime PM: %d\n", ret);
}
static const u32 imx8qxp_ldb_bus_output_fmts[] = {
MEDIA_BUS_FMT_RGB666_1X7X3_SPWG,
MEDIA_BUS_FMT_RGB888_1X7X4_SPWG,
MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA,
MEDIA_BUS_FMT_FIXED,
};
static bool imx8qxp_ldb_bus_output_fmt_supported(u32 fmt)
{
int i;
for (i = 0; i < ARRAY_SIZE(imx8qxp_ldb_bus_output_fmts); i++) {
if (imx8qxp_ldb_bus_output_fmts[i] == fmt)
return true;
}
return false;
}
static u32 *
imx8qxp_ldb_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
struct drm_bridge_state *bridge_state,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state,
u32 output_fmt,
unsigned int *num_input_fmts)
{
struct drm_display_info *di;
const struct drm_format_info *finfo;
u32 *input_fmts;
if (!imx8qxp_ldb_bus_output_fmt_supported(output_fmt))
return NULL;
*num_input_fmts = 1;
input_fmts = kmalloc(sizeof(*input_fmts), GFP_KERNEL);
if (!input_fmts)
return NULL;
switch (output_fmt) {
case MEDIA_BUS_FMT_FIXED:
di = &conn_state->connector->display_info;
/*
* Look at the first bus format to determine input format.
* Default to MEDIA_BUS_FMT_RGB888_1X24, if no match.
*/
if (di->num_bus_formats) {
finfo = drm_format_info(di->bus_formats[0]);
input_fmts[0] = finfo->depth == 18 ?
MEDIA_BUS_FMT_RGB666_1X24_CPADHI :
MEDIA_BUS_FMT_RGB888_1X24;
} else {
input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
}
break;
case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
input_fmts[0] = MEDIA_BUS_FMT_RGB666_1X24_CPADHI;
break;
case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
break;
default:
kfree(input_fmts);
input_fmts = NULL;
break;
}
return input_fmts;
}
static u32 *
imx8qxp_ldb_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
struct drm_bridge_state *bridge_state,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state,
unsigned int *num_output_fmts)
{
*num_output_fmts = ARRAY_SIZE(imx8qxp_ldb_bus_output_fmts);
return kmemdup(imx8qxp_ldb_bus_output_fmts,
sizeof(imx8qxp_ldb_bus_output_fmts), GFP_KERNEL);
}
static enum drm_mode_status
imx8qxp_ldb_bridge_mode_valid(struct drm_bridge *bridge,
const struct drm_display_info *info,
const struct drm_display_mode *mode)
{
struct ldb_channel *ldb_ch = bridge->driver_private;
bool is_single = ldb_channel_is_single_link(ldb_ch);
if (mode->clock > 170000)
return MODE_CLOCK_HIGH;
if (mode->clock > 150000 && is_single)
return MODE_CLOCK_HIGH;
return MODE_OK;
}
static const struct drm_bridge_funcs imx8qxp_ldb_bridge_funcs = {
.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
.atomic_reset = drm_atomic_helper_bridge_reset,
.mode_valid = imx8qxp_ldb_bridge_mode_valid,
.attach = ldb_bridge_attach_helper,
.atomic_check = imx8qxp_ldb_bridge_atomic_check,
.mode_set = imx8qxp_ldb_bridge_mode_set,
.atomic_pre_enable = imx8qxp_ldb_bridge_atomic_pre_enable,
.atomic_enable = imx8qxp_ldb_bridge_atomic_enable,
.atomic_disable = imx8qxp_ldb_bridge_atomic_disable,
.atomic_get_input_bus_fmts =
imx8qxp_ldb_bridge_atomic_get_input_bus_fmts,
.atomic_get_output_bus_fmts =
imx8qxp_ldb_bridge_atomic_get_output_bus_fmts,
};
static int imx8qxp_ldb_set_di_id(struct imx8qxp_ldb *imx8qxp_ldb)
{
struct imx8qxp_ldb_channel *imx8qxp_ldb_ch =
&imx8qxp_ldb->channel[imx8qxp_ldb->active_chno];
struct ldb_channel *ldb_ch = &imx8qxp_ldb_ch->base;
struct device_node *ep, *remote;
struct device *dev = imx8qxp_ldb->dev;
struct of_endpoint endpoint;
int ret;
ep = of_graph_get_endpoint_by_regs(ldb_ch->np, 0, -1);
if (!ep) {
DRM_DEV_ERROR(dev, "failed to get port0 endpoint\n");
return -EINVAL;
}
remote = of_graph_get_remote_endpoint(ep);
of_node_put(ep);
if (!remote) {
DRM_DEV_ERROR(dev, "failed to get port0 remote endpoint\n");
return -EINVAL;
}
ret = of_graph_parse_endpoint(remote, &endpoint);
of_node_put(remote);
if (ret) {
DRM_DEV_ERROR(dev, "failed to parse port0 remote endpoint: %d\n",
ret);
return ret;
}
imx8qxp_ldb_ch->di_id = endpoint.id;
return 0;
}
static int
imx8qxp_ldb_check_chno_and_dual_link(struct ldb_channel *ldb_ch, int link)
{
if ((link == DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS && ldb_ch->chno != 0) ||
(link == DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS && ldb_ch->chno != 1))
return -EINVAL;
return 0;
}
static int imx8qxp_ldb_parse_dt_companion(struct imx8qxp_ldb *imx8qxp_ldb)
{
struct imx8qxp_ldb_channel *imx8qxp_ldb_ch =
&imx8qxp_ldb->channel[imx8qxp_ldb->active_chno];
struct ldb_channel *ldb_ch = &imx8qxp_ldb_ch->base;
struct ldb_channel *companion_ldb_ch;
struct device_node *companion;
struct device_node *child;
struct device_node *companion_port = NULL;
struct device_node *port1, *port2;
struct device *dev = imx8qxp_ldb->dev;
const struct of_device_id *match;
u32 i;
int dual_link;
int ret;
/* Locate the companion LDB for dual-link operation, if any. */
companion = of_parse_phandle(dev->of_node, "fsl,companion-ldb", 0);
if (!companion)
return 0;
if (!of_device_is_available(companion)) {
DRM_DEV_ERROR(dev, "companion LDB is not available\n");
ret = -ENODEV;
goto out;
}
/*
* Sanity check: the companion bridge must have the same compatible
* string.
*/
match = of_match_device(dev->driver->of_match_table, dev);
if (!of_device_is_compatible(companion, match->compatible)) {
DRM_DEV_ERROR(dev, "companion LDB is incompatible\n");
ret = -ENXIO;
goto out;
}
for_each_available_child_of_node(companion, child) {
ret = of_property_read_u32(child, "reg", &i);
if (ret || i > MAX_LDB_CHAN_NUM - 1) {
DRM_DEV_ERROR(dev,
"invalid channel node address: %u\n", i);
ret = -EINVAL;
of_node_put(child);
goto out;
}
/*
* Channel numbers have to be different, because channel0
* transmits odd pixels and channel1 transmits even pixels.
*/
if (i == (ldb_ch->chno ^ 0x1)) {
companion_port = child;
break;
}
}
if (!companion_port) {
DRM_DEV_ERROR(dev,
"failed to find companion LDB channel port\n");
ret = -EINVAL;
goto out;
}
/*
* We need to work out if the sink is expecting us to function in
* dual-link mode. We do this by looking at the DT port nodes we are
* connected to. If they are marked as expecting odd pixels and
* even pixels than we need to enable LDB split mode.
*/
port1 = of_graph_get_port_by_id(ldb_ch->np, 1);
port2 = of_graph_get_port_by_id(companion_port, 1);
dual_link = drm_of_lvds_get_dual_link_pixel_order(port1, port2);
of_node_put(port1);
of_node_put(port2);
switch (dual_link) {
case DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS:
ldb_ch->link_type = LDB_CH_DUAL_LINK_ODD_EVEN_PIXELS;
break;
case DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS:
ldb_ch->link_type = LDB_CH_DUAL_LINK_EVEN_ODD_PIXELS;
break;
default:
ret = dual_link;
DRM_DEV_ERROR(dev,
"failed to get dual link pixel order: %d\n", ret);
goto out;
}
ret = imx8qxp_ldb_check_chno_and_dual_link(ldb_ch, dual_link);
if (ret < 0) {
DRM_DEV_ERROR(dev,
"unmatched channel number(%u) vs dual link(%d)\n",
ldb_ch->chno, dual_link);
goto out;
}
imx8qxp_ldb->companion = of_drm_find_bridge(companion_port);
if (!imx8qxp_ldb->companion) {
ret = -EPROBE_DEFER;
DRM_DEV_DEBUG_DRIVER(dev,
"failed to find bridge for companion bridge: %d\n",
ret);
goto out;
}
DRM_DEV_DEBUG_DRIVER(dev,
"dual-link configuration detected (companion bridge %pOF)\n",
companion);
companion_ldb_ch = bridge_to_ldb_ch(imx8qxp_ldb->companion);
companion_ldb_ch->link_type = ldb_ch->link_type;
out:
of_node_put(companion_port);
of_node_put(companion);
return ret;
}
static int imx8qxp_ldb_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct imx8qxp_ldb *imx8qxp_ldb;
struct imx8qxp_ldb_channel *imx8qxp_ldb_ch;
struct ldb *ldb;
struct ldb_channel *ldb_ch;
int ret, i;
imx8qxp_ldb = devm_kzalloc(dev, sizeof(*imx8qxp_ldb), GFP_KERNEL);
if (!imx8qxp_ldb)
return -ENOMEM;
imx8qxp_ldb->clk_pixel = devm_clk_get(dev, "pixel");
if (IS_ERR(imx8qxp_ldb->clk_pixel)) {
ret = PTR_ERR(imx8qxp_ldb->clk_pixel);
if (ret != -EPROBE_DEFER)
DRM_DEV_ERROR(dev,
"failed to get pixel clock: %d\n", ret);
return ret;
}
imx8qxp_ldb->clk_bypass = devm_clk_get(dev, "bypass");
if (IS_ERR(imx8qxp_ldb->clk_bypass)) {
ret = PTR_ERR(imx8qxp_ldb->clk_bypass);
if (ret != -EPROBE_DEFER)
DRM_DEV_ERROR(dev,
"failed to get bypass clock: %d\n", ret);
return ret;
}
imx8qxp_ldb->dev = dev;
ldb = &imx8qxp_ldb->base;
ldb->dev = dev;
ldb->ctrl_reg = 0xe0;
for (i = 0; i < MAX_LDB_CHAN_NUM; i++)
ldb->channel[i] = &imx8qxp_ldb->channel[i].base;
ret = ldb_init_helper(ldb);
if (ret)
return ret;
if (ldb->available_ch_cnt == 0) {
DRM_DEV_DEBUG_DRIVER(dev, "no available channel\n");
return 0;
} else if (ldb->available_ch_cnt > 1) {
DRM_DEV_ERROR(dev, "invalid available channel number(%u)\n",
ldb->available_ch_cnt);
return -EINVAL;
}
for (i = 0; i < MAX_LDB_CHAN_NUM; i++) {
imx8qxp_ldb_ch = &imx8qxp_ldb->channel[i];
ldb_ch = &imx8qxp_ldb_ch->base;
if (ldb_ch->is_available) {
imx8qxp_ldb->active_chno = ldb_ch->chno;
break;
}
}
imx8qxp_ldb_ch->phy = devm_of_phy_get(dev, ldb_ch->np, "lvds_phy");
if (IS_ERR(imx8qxp_ldb_ch->phy)) {
ret = PTR_ERR(imx8qxp_ldb_ch->phy);
if (ret != -EPROBE_DEFER)
DRM_DEV_ERROR(dev, "failed to get channel%d PHY: %d\n",
imx8qxp_ldb->active_chno, ret);
return ret;
}
ret = ldb_find_next_bridge_helper(ldb);
if (ret)
return ret;
ret = imx8qxp_ldb_set_di_id(imx8qxp_ldb);
if (ret)
return ret;
ret = imx8qxp_ldb_parse_dt_companion(imx8qxp_ldb);
if (ret)
return ret;
platform_set_drvdata(pdev, imx8qxp_ldb);
pm_runtime_enable(dev);
ldb_add_bridge_helper(ldb, &imx8qxp_ldb_bridge_funcs);
return ret;
}
static int imx8qxp_ldb_remove(struct platform_device *pdev)
{
struct imx8qxp_ldb *imx8qxp_ldb = platform_get_drvdata(pdev);
struct ldb *ldb = &imx8qxp_ldb->base;
ldb_remove_bridge_helper(ldb);
pm_runtime_disable(&pdev->dev);
return 0;
}
static int __maybe_unused imx8qxp_ldb_runtime_suspend(struct device *dev)
{
return 0;
}
static int __maybe_unused imx8qxp_ldb_runtime_resume(struct device *dev)
{
struct imx8qxp_ldb *imx8qxp_ldb = dev_get_drvdata(dev);
struct ldb *ldb = &imx8qxp_ldb->base;
/* disable LDB by resetting the control register to POR default */
regmap_write(ldb->regmap, ldb->ctrl_reg, 0);
return 0;
}
static const struct dev_pm_ops imx8qxp_ldb_pm_ops = {
SET_RUNTIME_PM_OPS(imx8qxp_ldb_runtime_suspend,
imx8qxp_ldb_runtime_resume, NULL)
};
static const struct of_device_id imx8qxp_ldb_dt_ids[] = {
{ .compatible = "fsl,imx8qxp-ldb" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, imx8qxp_ldb_dt_ids);
static struct platform_driver imx8qxp_ldb_driver = {
.probe = imx8qxp_ldb_probe,
.remove = imx8qxp_ldb_remove,
.driver = {
.pm = &imx8qxp_ldb_pm_ops,
.name = DRIVER_NAME,
.of_match_table = imx8qxp_ldb_dt_ids,
},
};
module_platform_driver(imx8qxp_ldb_driver);
MODULE_DESCRIPTION("i.MX8QXP LVDS Display Bridge(LDB)/Pixel Mapper bridge driver");
MODULE_AUTHOR("Liu Ying <victor.liu@nxp.com>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:" DRIVER_NAME);
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