2 * i.MX drm driver - LVDS display bridge
4 * Copyright (C) 2012 Sascha Hauer, Pengutronix
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
16 #include <linux/module.h>
17 #include <linux/clk.h>
18 #include <linux/component.h>
20 #include <drm/drm_atomic.h>
21 #include <drm/drm_atomic_helper.h>
22 #include <drm/drm_fb_helper.h>
23 #include <drm/drm_crtc_helper.h>
24 #include <drm/drm_of.h>
25 #include <drm/drm_panel.h>
26 #include <linux/mfd/syscon.h>
27 #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
28 #include <linux/of_device.h>
29 #include <linux/of_graph.h>
30 #include <video/of_display_timing.h>
31 #include <video/of_videomode.h>
32 #include <linux/regmap.h>
33 #include <linux/videodev2.h>
37 #define DRIVER_NAME "imx-ldb"
39 #define LDB_CH0_MODE_EN_TO_DI0 (1 << 0)
40 #define LDB_CH0_MODE_EN_TO_DI1 (3 << 0)
41 #define LDB_CH0_MODE_EN_MASK (3 << 0)
42 #define LDB_CH1_MODE_EN_TO_DI0 (1 << 2)
43 #define LDB_CH1_MODE_EN_TO_DI1 (3 << 2)
44 #define LDB_CH1_MODE_EN_MASK (3 << 2)
45 #define LDB_SPLIT_MODE_EN (1 << 4)
46 #define LDB_DATA_WIDTH_CH0_24 (1 << 5)
47 #define LDB_BIT_MAP_CH0_JEIDA (1 << 6)
48 #define LDB_DATA_WIDTH_CH1_24 (1 << 7)
49 #define LDB_BIT_MAP_CH1_JEIDA (1 << 8)
50 #define LDB_DI0_VS_POL_ACT_LOW (1 << 9)
51 #define LDB_DI1_VS_POL_ACT_LOW (1 << 10)
52 #define LDB_BGREF_RMODE_INT (1 << 15)
56 struct imx_ldb_channel {
58 struct drm_connector connector;
59 struct drm_encoder encoder;
60 struct drm_panel *panel;
61 struct device_node *child;
62 struct i2c_adapter *ddc;
66 struct drm_display_mode mode;
71 static inline struct imx_ldb_channel *con_to_imx_ldb_ch(struct drm_connector *c)
73 return container_of(c, struct imx_ldb_channel, connector);
76 static inline struct imx_ldb_channel *enc_to_imx_ldb_ch(struct drm_encoder *e)
78 return container_of(e, struct imx_ldb_channel, encoder);
88 struct regmap *regmap;
90 struct imx_ldb_channel channel[2];
91 struct clk *clk[2]; /* our own clock */
92 struct clk *clk_sel[4]; /* parent of display clock */
93 struct clk *clk_parent[4]; /* original parent of clk_sel */
94 struct clk *clk_pll[2]; /* upstream clock we can adjust */
96 const struct bus_mux *lvds_mux;
99 static enum drm_connector_status imx_ldb_connector_detect(
100 struct drm_connector *connector, bool force)
102 return connector_status_connected;
105 static void imx_ldb_ch_set_bus_format(struct imx_ldb_channel *imx_ldb_ch,
108 struct imx_ldb *ldb = imx_ldb_ch->ldb;
109 int dual = ldb->ldb_ctrl & LDB_SPLIT_MODE_EN;
111 switch (bus_format) {
112 case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
114 case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
115 if (imx_ldb_ch->chno == 0 || dual)
116 ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH0_24;
117 if (imx_ldb_ch->chno == 1 || dual)
118 ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH1_24;
120 case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
121 if (imx_ldb_ch->chno == 0 || dual)
122 ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH0_24 |
123 LDB_BIT_MAP_CH0_JEIDA;
124 if (imx_ldb_ch->chno == 1 || dual)
125 ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH1_24 |
126 LDB_BIT_MAP_CH1_JEIDA;
131 static int imx_ldb_connector_get_modes(struct drm_connector *connector)
133 struct imx_ldb_channel *imx_ldb_ch = con_to_imx_ldb_ch(connector);
136 if (imx_ldb_ch->panel && imx_ldb_ch->panel->funcs &&
137 imx_ldb_ch->panel->funcs->get_modes) {
138 num_modes = imx_ldb_ch->panel->funcs->get_modes(imx_ldb_ch->panel);
143 if (!imx_ldb_ch->edid && imx_ldb_ch->ddc)
144 imx_ldb_ch->edid = drm_get_edid(connector, imx_ldb_ch->ddc);
146 if (imx_ldb_ch->edid) {
147 drm_mode_connector_update_edid_property(connector,
149 num_modes = drm_add_edid_modes(connector, imx_ldb_ch->edid);
152 if (imx_ldb_ch->mode_valid) {
153 struct drm_display_mode *mode;
155 mode = drm_mode_create(connector->dev);
158 drm_mode_copy(mode, &imx_ldb_ch->mode);
159 mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
160 drm_mode_probed_add(connector, mode);
167 static struct drm_encoder *imx_ldb_connector_best_encoder(
168 struct drm_connector *connector)
170 struct imx_ldb_channel *imx_ldb_ch = con_to_imx_ldb_ch(connector);
172 return &imx_ldb_ch->encoder;
175 static void imx_ldb_set_clock(struct imx_ldb *ldb, int mux, int chno,
176 unsigned long serial_clk, unsigned long di_clk)
180 dev_dbg(ldb->dev, "%s: now: %ld want: %ld\n", __func__,
181 clk_get_rate(ldb->clk_pll[chno]), serial_clk);
182 clk_set_rate(ldb->clk_pll[chno], serial_clk);
184 dev_dbg(ldb->dev, "%s after: %ld\n", __func__,
185 clk_get_rate(ldb->clk_pll[chno]));
187 dev_dbg(ldb->dev, "%s: now: %ld want: %ld\n", __func__,
188 clk_get_rate(ldb->clk[chno]),
190 clk_set_rate(ldb->clk[chno], di_clk);
192 dev_dbg(ldb->dev, "%s after: %ld\n", __func__,
193 clk_get_rate(ldb->clk[chno]));
195 /* set display clock mux to LDB input clock */
196 ret = clk_set_parent(ldb->clk_sel[mux], ldb->clk[chno]);
199 "unable to set di%d parent clock to ldb_di%d\n", mux,
203 static void imx_ldb_encoder_enable(struct drm_encoder *encoder)
205 struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder);
206 struct imx_ldb *ldb = imx_ldb_ch->ldb;
207 int dual = ldb->ldb_ctrl & LDB_SPLIT_MODE_EN;
208 int mux = drm_of_encoder_active_port_id(imx_ldb_ch->child, encoder);
210 drm_panel_prepare(imx_ldb_ch->panel);
213 clk_set_parent(ldb->clk_sel[mux], ldb->clk[0]);
214 clk_set_parent(ldb->clk_sel[mux], ldb->clk[1]);
216 clk_prepare_enable(ldb->clk[0]);
217 clk_prepare_enable(ldb->clk[1]);
219 clk_set_parent(ldb->clk_sel[mux], ldb->clk[imx_ldb_ch->chno]);
222 if (imx_ldb_ch == &ldb->channel[0] || dual) {
223 ldb->ldb_ctrl &= ~LDB_CH0_MODE_EN_MASK;
224 if (mux == 0 || ldb->lvds_mux)
225 ldb->ldb_ctrl |= LDB_CH0_MODE_EN_TO_DI0;
227 ldb->ldb_ctrl |= LDB_CH0_MODE_EN_TO_DI1;
229 if (imx_ldb_ch == &ldb->channel[1] || dual) {
230 ldb->ldb_ctrl &= ~LDB_CH1_MODE_EN_MASK;
231 if (mux == 1 || ldb->lvds_mux)
232 ldb->ldb_ctrl |= LDB_CH1_MODE_EN_TO_DI1;
234 ldb->ldb_ctrl |= LDB_CH1_MODE_EN_TO_DI0;
238 const struct bus_mux *lvds_mux = NULL;
240 if (imx_ldb_ch == &ldb->channel[0])
241 lvds_mux = &ldb->lvds_mux[0];
242 else if (imx_ldb_ch == &ldb->channel[1])
243 lvds_mux = &ldb->lvds_mux[1];
245 regmap_update_bits(ldb->regmap, lvds_mux->reg, lvds_mux->mask,
246 mux << lvds_mux->shift);
249 regmap_write(ldb->regmap, IOMUXC_GPR2, ldb->ldb_ctrl);
251 drm_panel_enable(imx_ldb_ch->panel);
254 static void imx_ldb_encoder_mode_set(struct drm_encoder *encoder,
255 struct drm_display_mode *orig_mode,
256 struct drm_display_mode *mode)
258 struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder);
259 struct imx_ldb *ldb = imx_ldb_ch->ldb;
260 int dual = ldb->ldb_ctrl & LDB_SPLIT_MODE_EN;
261 unsigned long serial_clk;
262 unsigned long di_clk = mode->clock * 1000;
263 int mux = drm_of_encoder_active_port_id(imx_ldb_ch->child, encoder);
264 u32 bus_format = imx_ldb_ch->bus_format;
266 if (mode->clock > 170000) {
268 "%s: mode exceeds 170 MHz pixel clock\n", __func__);
270 if (mode->clock > 85000 && !dual) {
272 "%s: mode exceeds 85 MHz pixel clock\n", __func__);
276 serial_clk = 3500UL * mode->clock;
277 imx_ldb_set_clock(ldb, mux, 0, serial_clk, di_clk);
278 imx_ldb_set_clock(ldb, mux, 1, serial_clk, di_clk);
280 serial_clk = 7000UL * mode->clock;
281 imx_ldb_set_clock(ldb, mux, imx_ldb_ch->chno, serial_clk,
285 /* FIXME - assumes straight connections DI0 --> CH0, DI1 --> CH1 */
286 if (imx_ldb_ch == &ldb->channel[0] || dual) {
287 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
288 ldb->ldb_ctrl |= LDB_DI0_VS_POL_ACT_LOW;
289 else if (mode->flags & DRM_MODE_FLAG_PVSYNC)
290 ldb->ldb_ctrl &= ~LDB_DI0_VS_POL_ACT_LOW;
292 if (imx_ldb_ch == &ldb->channel[1] || dual) {
293 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
294 ldb->ldb_ctrl |= LDB_DI1_VS_POL_ACT_LOW;
295 else if (mode->flags & DRM_MODE_FLAG_PVSYNC)
296 ldb->ldb_ctrl &= ~LDB_DI1_VS_POL_ACT_LOW;
300 struct drm_connector *connector;
302 drm_for_each_connector(connector, encoder->dev) {
303 struct drm_display_info *di = &connector->display_info;
305 if (connector->encoder == encoder &&
306 di->num_bus_formats) {
307 bus_format = di->bus_formats[0];
312 imx_ldb_ch_set_bus_format(imx_ldb_ch, bus_format);
315 static void imx_ldb_encoder_disable(struct drm_encoder *encoder)
317 struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder);
318 struct imx_ldb *ldb = imx_ldb_ch->ldb;
322 * imx_ldb_encoder_disable is called by
323 * drm_helper_disable_unused_functions without
324 * the encoder being enabled before.
326 if (imx_ldb_ch == &ldb->channel[0] &&
327 (ldb->ldb_ctrl & LDB_CH0_MODE_EN_MASK) == 0)
329 else if (imx_ldb_ch == &ldb->channel[1] &&
330 (ldb->ldb_ctrl & LDB_CH1_MODE_EN_MASK) == 0)
333 drm_panel_disable(imx_ldb_ch->panel);
335 if (imx_ldb_ch == &ldb->channel[0])
336 ldb->ldb_ctrl &= ~LDB_CH0_MODE_EN_MASK;
337 else if (imx_ldb_ch == &ldb->channel[1])
338 ldb->ldb_ctrl &= ~LDB_CH1_MODE_EN_MASK;
340 regmap_write(ldb->regmap, IOMUXC_GPR2, ldb->ldb_ctrl);
342 if (ldb->ldb_ctrl & LDB_SPLIT_MODE_EN) {
343 clk_disable_unprepare(ldb->clk[0]);
344 clk_disable_unprepare(ldb->clk[1]);
348 const struct bus_mux *lvds_mux = NULL;
350 if (imx_ldb_ch == &ldb->channel[0])
351 lvds_mux = &ldb->lvds_mux[0];
352 else if (imx_ldb_ch == &ldb->channel[1])
353 lvds_mux = &ldb->lvds_mux[1];
355 regmap_read(ldb->regmap, lvds_mux->reg, &mux);
356 mux &= lvds_mux->mask;
357 mux >>= lvds_mux->shift;
359 mux = (imx_ldb_ch == &ldb->channel[0]) ? 0 : 1;
362 /* set display clock mux back to original input clock */
363 ret = clk_set_parent(ldb->clk_sel[mux], ldb->clk_parent[mux]);
366 "unable to set di%d parent clock to original parent\n",
369 drm_panel_unprepare(imx_ldb_ch->panel);
372 static int imx_ldb_encoder_atomic_check(struct drm_encoder *encoder,
373 struct drm_crtc_state *crtc_state,
374 struct drm_connector_state *conn_state)
376 struct imx_crtc_state *imx_crtc_state = to_imx_crtc_state(crtc_state);
377 struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder);
378 struct drm_display_info *di = &conn_state->connector->display_info;
379 u32 bus_format = imx_ldb_ch->bus_format;
381 /* Bus format description in DT overrides connector display info. */
382 if (!bus_format && di->num_bus_formats)
383 bus_format = di->bus_formats[0];
384 switch (bus_format) {
385 case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
386 imx_crtc_state->bus_format = MEDIA_BUS_FMT_RGB666_1X18;
388 case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
389 case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
390 imx_crtc_state->bus_format = MEDIA_BUS_FMT_RGB888_1X24;
396 imx_crtc_state->di_hsync_pin = 2;
397 imx_crtc_state->di_vsync_pin = 3;
403 static const struct drm_connector_funcs imx_ldb_connector_funcs = {
404 .dpms = drm_atomic_helper_connector_dpms,
405 .fill_modes = drm_helper_probe_single_connector_modes,
406 .detect = imx_ldb_connector_detect,
407 .destroy = imx_drm_connector_destroy,
408 .reset = drm_atomic_helper_connector_reset,
409 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
410 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
413 static const struct drm_connector_helper_funcs imx_ldb_connector_helper_funcs = {
414 .get_modes = imx_ldb_connector_get_modes,
415 .best_encoder = imx_ldb_connector_best_encoder,
418 static const struct drm_encoder_funcs imx_ldb_encoder_funcs = {
419 .destroy = imx_drm_encoder_destroy,
422 static const struct drm_encoder_helper_funcs imx_ldb_encoder_helper_funcs = {
423 .mode_set = imx_ldb_encoder_mode_set,
424 .enable = imx_ldb_encoder_enable,
425 .disable = imx_ldb_encoder_disable,
426 .atomic_check = imx_ldb_encoder_atomic_check,
429 static int imx_ldb_get_clk(struct imx_ldb *ldb, int chno)
433 snprintf(clkname, sizeof(clkname), "di%d", chno);
434 ldb->clk[chno] = devm_clk_get(ldb->dev, clkname);
435 if (IS_ERR(ldb->clk[chno]))
436 return PTR_ERR(ldb->clk[chno]);
438 snprintf(clkname, sizeof(clkname), "di%d_pll", chno);
439 ldb->clk_pll[chno] = devm_clk_get(ldb->dev, clkname);
441 return PTR_ERR_OR_ZERO(ldb->clk_pll[chno]);
444 static int imx_ldb_register(struct drm_device *drm,
445 struct imx_ldb_channel *imx_ldb_ch)
447 struct imx_ldb *ldb = imx_ldb_ch->ldb;
448 struct drm_encoder *encoder = &imx_ldb_ch->encoder;
451 ret = imx_drm_encoder_parse_of(drm, encoder, imx_ldb_ch->child);
455 ret = imx_ldb_get_clk(ldb, imx_ldb_ch->chno);
459 if (ldb->ldb_ctrl & LDB_SPLIT_MODE_EN) {
460 ret = imx_ldb_get_clk(ldb, 1);
465 drm_encoder_helper_add(encoder, &imx_ldb_encoder_helper_funcs);
466 drm_encoder_init(drm, encoder, &imx_ldb_encoder_funcs,
467 DRM_MODE_ENCODER_LVDS, NULL);
469 drm_connector_helper_add(&imx_ldb_ch->connector,
470 &imx_ldb_connector_helper_funcs);
471 drm_connector_init(drm, &imx_ldb_ch->connector,
472 &imx_ldb_connector_funcs, DRM_MODE_CONNECTOR_LVDS);
474 if (imx_ldb_ch->panel) {
475 ret = drm_panel_attach(imx_ldb_ch->panel,
476 &imx_ldb_ch->connector);
481 drm_mode_connector_attach_encoder(&imx_ldb_ch->connector, encoder);
491 struct imx_ldb_bit_mapping {
494 const char * const mapping;
497 static const struct imx_ldb_bit_mapping imx_ldb_bit_mappings[] = {
498 { MEDIA_BUS_FMT_RGB666_1X7X3_SPWG, 18, "spwg" },
499 { MEDIA_BUS_FMT_RGB888_1X7X4_SPWG, 24, "spwg" },
500 { MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA, 24, "jeida" },
503 static u32 of_get_bus_format(struct device *dev, struct device_node *np)
509 ret = of_property_read_string(np, "fsl,data-mapping", &bm);
513 of_property_read_u32(np, "fsl,data-width", &datawidth);
515 for (i = 0; i < ARRAY_SIZE(imx_ldb_bit_mappings); i++) {
516 if (!strcasecmp(bm, imx_ldb_bit_mappings[i].mapping) &&
517 datawidth == imx_ldb_bit_mappings[i].datawidth)
518 return imx_ldb_bit_mappings[i].bus_format;
521 dev_err(dev, "invalid data mapping: %d-bit \"%s\"\n", datawidth, bm);
526 static struct bus_mux imx6q_lvds_mux[2] = {
530 .mask = IMX6Q_GPR3_LVDS0_MUX_CTL_MASK,
534 .mask = IMX6Q_GPR3_LVDS1_MUX_CTL_MASK,
539 * For a device declaring compatible = "fsl,imx6q-ldb", "fsl,imx53-ldb",
540 * of_match_device will walk through this list and take the first entry
541 * matching any of its compatible values. Therefore, the more generic
542 * entries (in this case fsl,imx53-ldb) need to be ordered last.
544 static const struct of_device_id imx_ldb_dt_ids[] = {
545 { .compatible = "fsl,imx6q-ldb", .data = imx6q_lvds_mux, },
546 { .compatible = "fsl,imx53-ldb", .data = NULL, },
549 MODULE_DEVICE_TABLE(of, imx_ldb_dt_ids);
551 static int imx_ldb_bind(struct device *dev, struct device *master, void *data)
553 struct drm_device *drm = data;
554 struct device_node *np = dev->of_node;
555 const struct of_device_id *of_id =
556 of_match_device(imx_ldb_dt_ids, dev);
557 struct device_node *child;
559 struct imx_ldb *imx_ldb;
564 imx_ldb = devm_kzalloc(dev, sizeof(*imx_ldb), GFP_KERNEL);
568 imx_ldb->regmap = syscon_regmap_lookup_by_phandle(np, "gpr");
569 if (IS_ERR(imx_ldb->regmap)) {
570 dev_err(dev, "failed to get parent regmap\n");
571 return PTR_ERR(imx_ldb->regmap);
577 imx_ldb->lvds_mux = of_id->data;
579 dual = of_property_read_bool(np, "fsl,dual-channel");
581 imx_ldb->ldb_ctrl |= LDB_SPLIT_MODE_EN;
584 * There are three different possible clock mux configurations:
585 * i.MX53: ipu1_di0_sel, ipu1_di1_sel
586 * i.MX6q: ipu1_di0_sel, ipu1_di1_sel, ipu2_di0_sel, ipu2_di1_sel
587 * i.MX6dl: ipu1_di0_sel, ipu1_di1_sel, lcdif_sel
588 * Map them all to di0_sel...di3_sel.
590 for (i = 0; i < 4; i++) {
593 sprintf(clkname, "di%d_sel", i);
594 imx_ldb->clk_sel[i] = devm_clk_get(imx_ldb->dev, clkname);
595 if (IS_ERR(imx_ldb->clk_sel[i])) {
596 ret = PTR_ERR(imx_ldb->clk_sel[i]);
597 imx_ldb->clk_sel[i] = NULL;
601 imx_ldb->clk_parent[i] = clk_get_parent(imx_ldb->clk_sel[i]);
606 for_each_child_of_node(np, child) {
607 struct imx_ldb_channel *channel;
608 struct device_node *ddc_node;
609 struct device_node *ep;
612 ret = of_property_read_u32(child, "reg", &i);
613 if (ret || i < 0 || i > 1)
617 dev_warn(dev, "dual-channel mode, ignoring second output\n");
621 if (!of_device_is_available(child))
624 channel = &imx_ldb->channel[i];
625 channel->ldb = imx_ldb;
627 channel->child = child;
630 * The output port is port@4 with an external 4-port mux or
631 * port@2 with the internal 2-port mux.
633 ep = of_graph_get_endpoint_by_regs(child,
634 imx_ldb->lvds_mux ? 4 : 2,
637 struct device_node *remote;
639 remote = of_graph_get_remote_port_parent(ep);
642 channel->panel = of_drm_find_panel(remote);
644 return -EPROBE_DEFER;
646 if (!channel->panel) {
647 dev_err(dev, "panel not found: %s\n",
649 return -EPROBE_DEFER;
653 ddc_node = of_parse_phandle(child, "ddc-i2c-bus", 0);
655 channel->ddc = of_find_i2c_adapter_by_node(ddc_node);
656 of_node_put(ddc_node);
658 dev_warn(dev, "failed to get ddc i2c adapter\n");
659 return -EPROBE_DEFER;
664 /* if no DDC available, fallback to hardcoded EDID */
665 dev_dbg(dev, "no ddc available\n");
667 edidp = of_get_property(child, "edid",
670 channel->edid = kmemdup(edidp,
673 } else if (!channel->panel) {
674 /* fallback to display-timings node */
675 ret = of_get_drm_display_mode(child,
679 channel->mode_valid = 1;
683 bus_format = of_get_bus_format(dev, child);
684 if (bus_format == -EINVAL) {
686 * If no bus format was specified in the device tree,
687 * we can still get it from the connected panel later.
689 if (channel->panel && channel->panel->funcs &&
690 channel->panel->funcs->get_modes)
693 if (bus_format < 0) {
694 dev_err(dev, "could not determine data mapping: %d\n",
698 channel->bus_format = bus_format;
700 ret = imx_ldb_register(drm, channel);
705 dev_set_drvdata(dev, imx_ldb);
710 static void imx_ldb_unbind(struct device *dev, struct device *master,
713 struct imx_ldb *imx_ldb = dev_get_drvdata(dev);
716 for (i = 0; i < 2; i++) {
717 struct imx_ldb_channel *channel = &imx_ldb->channel[i];
719 if (!channel->connector.funcs)
722 channel->connector.funcs->destroy(&channel->connector);
723 channel->encoder.funcs->destroy(&channel->encoder);
725 kfree(channel->edid);
726 i2c_put_adapter(channel->ddc);
730 static const struct component_ops imx_ldb_ops = {
731 .bind = imx_ldb_bind,
732 .unbind = imx_ldb_unbind,
735 static int imx_ldb_probe(struct platform_device *pdev)
737 return component_add(&pdev->dev, &imx_ldb_ops);
740 static int imx_ldb_remove(struct platform_device *pdev)
742 component_del(&pdev->dev, &imx_ldb_ops);
746 static struct platform_driver imx_ldb_driver = {
747 .probe = imx_ldb_probe,
748 .remove = imx_ldb_remove,
750 .of_match_table = imx_ldb_dt_ids,
755 module_platform_driver(imx_ldb_driver);
757 MODULE_DESCRIPTION("i.MX LVDS driver");
758 MODULE_AUTHOR("Sascha Hauer, Pengutronix");
759 MODULE_LICENSE("GPL");
760 MODULE_ALIAS("platform:" DRIVER_NAME);