Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Liu Ying | 3237 | 99.75% | 1 | 25.00% |
Sascha Hauer | 3 | 0.09% | 1 | 25.00% |
Boris Brezillon | 3 | 0.09% | 1 | 25.00% |
Uwe Kleine-König | 2 | 0.06% | 1 | 25.00% |
Total | 3245 | 4 |
// 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/platform_device.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);
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