diff options
Diffstat (limited to 'drivers/gpu/drm/bridge/imx/imx8qxp-ldb-drv.c')
| -rw-r--r-- | drivers/gpu/drm/bridge/imx/imx8qxp-ldb-drv.c | 721 |
1 files changed, 0 insertions, 721 deletions
diff --git a/drivers/gpu/drm/bridge/imx/imx8qxp-ldb-drv.c b/drivers/gpu/drm/bridge/imx/imx8qxp-ldb-drv.c deleted file mode 100644 index c806576b1e22..000000000000 --- a/drivers/gpu/drm/bridge/imx/imx8qxp-ldb-drv.c +++ /dev/null @@ -1,721 +0,0 @@ -// 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 void 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); -} - -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_new = 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); |