1caab277bSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
2f76ee892STomi Valkeinen /*
3f76ee892STomi Valkeinen * linux/drivers/video/omap2/dss/sdi.c
4f76ee892STomi Valkeinen *
5f76ee892STomi Valkeinen * Copyright (C) 2009 Nokia Corporation
6f76ee892STomi Valkeinen * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
7f76ee892STomi Valkeinen */
8f76ee892STomi Valkeinen
9f76ee892STomi Valkeinen #define DSS_SUBSYS_NAME "SDI"
10f76ee892STomi Valkeinen
11f76ee892STomi Valkeinen #include <linux/kernel.h>
12f76ee892STomi Valkeinen #include <linux/delay.h>
13f76ee892STomi Valkeinen #include <linux/err.h>
14f76ee892STomi Valkeinen #include <linux/regulator/consumer.h>
15f76ee892STomi Valkeinen #include <linux/export.h>
16f76ee892STomi Valkeinen #include <linux/platform_device.h>
17f76ee892STomi Valkeinen #include <linux/string.h>
18f76ee892STomi Valkeinen #include <linux/of.h>
19f76ee892STomi Valkeinen #include <linux/component.h>
20f76ee892STomi Valkeinen
2162d9e44eSPeter Ujfalusi #include <video/omapfb_dss.h>
22f76ee892STomi Valkeinen #include "dss.h"
23f76ee892STomi Valkeinen
24f76ee892STomi Valkeinen static struct {
25f76ee892STomi Valkeinen struct platform_device *pdev;
26f76ee892STomi Valkeinen
27f76ee892STomi Valkeinen bool update_enabled;
28f76ee892STomi Valkeinen struct regulator *vdds_sdi_reg;
29f76ee892STomi Valkeinen
30f76ee892STomi Valkeinen struct dss_lcd_mgr_config mgr_config;
31f76ee892STomi Valkeinen struct omap_video_timings timings;
32f76ee892STomi Valkeinen int datapairs;
33f76ee892STomi Valkeinen
34f76ee892STomi Valkeinen struct omap_dss_device output;
35f76ee892STomi Valkeinen
36f76ee892STomi Valkeinen bool port_initialized;
37f76ee892STomi Valkeinen } sdi;
38f76ee892STomi Valkeinen
39f76ee892STomi Valkeinen struct sdi_clk_calc_ctx {
40f76ee892STomi Valkeinen unsigned long pck_min, pck_max;
41f76ee892STomi Valkeinen
42f76ee892STomi Valkeinen unsigned long fck;
43f76ee892STomi Valkeinen struct dispc_clock_info dispc_cinfo;
44f76ee892STomi Valkeinen };
45f76ee892STomi Valkeinen
dpi_calc_dispc_cb(int lckd,int pckd,unsigned long lck,unsigned long pck,void * data)46f76ee892STomi Valkeinen static bool dpi_calc_dispc_cb(int lckd, int pckd, unsigned long lck,
47f76ee892STomi Valkeinen unsigned long pck, void *data)
48f76ee892STomi Valkeinen {
49f76ee892STomi Valkeinen struct sdi_clk_calc_ctx *ctx = data;
50f76ee892STomi Valkeinen
51f76ee892STomi Valkeinen ctx->dispc_cinfo.lck_div = lckd;
52f76ee892STomi Valkeinen ctx->dispc_cinfo.pck_div = pckd;
53f76ee892STomi Valkeinen ctx->dispc_cinfo.lck = lck;
54f76ee892STomi Valkeinen ctx->dispc_cinfo.pck = pck;
55f76ee892STomi Valkeinen
56f76ee892STomi Valkeinen return true;
57f76ee892STomi Valkeinen }
58f76ee892STomi Valkeinen
dpi_calc_dss_cb(unsigned long fck,void * data)59f76ee892STomi Valkeinen static bool dpi_calc_dss_cb(unsigned long fck, void *data)
60f76ee892STomi Valkeinen {
61f76ee892STomi Valkeinen struct sdi_clk_calc_ctx *ctx = data;
62f76ee892STomi Valkeinen
63f76ee892STomi Valkeinen ctx->fck = fck;
64f76ee892STomi Valkeinen
65f76ee892STomi Valkeinen return dispc_div_calc(fck, ctx->pck_min, ctx->pck_max,
66f76ee892STomi Valkeinen dpi_calc_dispc_cb, ctx);
67f76ee892STomi Valkeinen }
68f76ee892STomi Valkeinen
sdi_calc_clock_div(unsigned long pclk,unsigned long * fck,struct dispc_clock_info * dispc_cinfo)69f76ee892STomi Valkeinen static int sdi_calc_clock_div(unsigned long pclk,
70f76ee892STomi Valkeinen unsigned long *fck,
71f76ee892STomi Valkeinen struct dispc_clock_info *dispc_cinfo)
72f76ee892STomi Valkeinen {
73f76ee892STomi Valkeinen int i;
74f76ee892STomi Valkeinen struct sdi_clk_calc_ctx ctx;
75f76ee892STomi Valkeinen
76f76ee892STomi Valkeinen /*
77f76ee892STomi Valkeinen * DSS fclk gives us very few possibilities, so finding a good pixel
78f76ee892STomi Valkeinen * clock may not be possible. We try multiple times to find the clock,
79f76ee892STomi Valkeinen * each time widening the pixel clock range we look for, up to
80f76ee892STomi Valkeinen * +/- 1MHz.
81f76ee892STomi Valkeinen */
82f76ee892STomi Valkeinen
83f76ee892STomi Valkeinen for (i = 0; i < 10; ++i) {
84f76ee892STomi Valkeinen bool ok;
85f76ee892STomi Valkeinen
86f76ee892STomi Valkeinen memset(&ctx, 0, sizeof(ctx));
87f76ee892STomi Valkeinen if (pclk > 1000 * i * i * i)
88f76ee892STomi Valkeinen ctx.pck_min = max(pclk - 1000 * i * i * i, 0lu);
89f76ee892STomi Valkeinen else
90f76ee892STomi Valkeinen ctx.pck_min = 0;
91f76ee892STomi Valkeinen ctx.pck_max = pclk + 1000 * i * i * i;
92f76ee892STomi Valkeinen
93f76ee892STomi Valkeinen ok = dss_div_calc(pclk, ctx.pck_min, dpi_calc_dss_cb, &ctx);
94f76ee892STomi Valkeinen if (ok) {
95f76ee892STomi Valkeinen *fck = ctx.fck;
96f76ee892STomi Valkeinen *dispc_cinfo = ctx.dispc_cinfo;
97f76ee892STomi Valkeinen return 0;
98f76ee892STomi Valkeinen }
99f76ee892STomi Valkeinen }
100f76ee892STomi Valkeinen
101f76ee892STomi Valkeinen return -EINVAL;
102f76ee892STomi Valkeinen }
103f76ee892STomi Valkeinen
sdi_config_lcd_manager(struct omap_dss_device * dssdev)104f76ee892STomi Valkeinen static void sdi_config_lcd_manager(struct omap_dss_device *dssdev)
105f76ee892STomi Valkeinen {
106f76ee892STomi Valkeinen struct omap_overlay_manager *mgr = sdi.output.manager;
107f76ee892STomi Valkeinen
108f76ee892STomi Valkeinen sdi.mgr_config.io_pad_mode = DSS_IO_PAD_MODE_BYPASS;
109f76ee892STomi Valkeinen
110f76ee892STomi Valkeinen sdi.mgr_config.stallmode = false;
111f76ee892STomi Valkeinen sdi.mgr_config.fifohandcheck = false;
112f76ee892STomi Valkeinen
113f76ee892STomi Valkeinen sdi.mgr_config.video_port_width = 24;
114f76ee892STomi Valkeinen sdi.mgr_config.lcden_sig_polarity = 1;
115f76ee892STomi Valkeinen
116f76ee892STomi Valkeinen dss_mgr_set_lcd_config(mgr, &sdi.mgr_config);
117f76ee892STomi Valkeinen }
118f76ee892STomi Valkeinen
sdi_display_enable(struct omap_dss_device * dssdev)119f76ee892STomi Valkeinen static int sdi_display_enable(struct omap_dss_device *dssdev)
120f76ee892STomi Valkeinen {
121f76ee892STomi Valkeinen struct omap_dss_device *out = &sdi.output;
122f76ee892STomi Valkeinen struct omap_video_timings *t = &sdi.timings;
123f76ee892STomi Valkeinen unsigned long fck;
124f76ee892STomi Valkeinen struct dispc_clock_info dispc_cinfo;
125f76ee892STomi Valkeinen unsigned long pck;
126f76ee892STomi Valkeinen int r;
127f76ee892STomi Valkeinen
128f76ee892STomi Valkeinen if (out->manager == NULL) {
129f76ee892STomi Valkeinen DSSERR("failed to enable display: no output/manager\n");
130f76ee892STomi Valkeinen return -ENODEV;
131f76ee892STomi Valkeinen }
132f76ee892STomi Valkeinen
133f76ee892STomi Valkeinen r = regulator_enable(sdi.vdds_sdi_reg);
134f76ee892STomi Valkeinen if (r)
135f76ee892STomi Valkeinen goto err_reg_enable;
136f76ee892STomi Valkeinen
137f76ee892STomi Valkeinen r = dispc_runtime_get();
138f76ee892STomi Valkeinen if (r)
139f76ee892STomi Valkeinen goto err_get_dispc;
140f76ee892STomi Valkeinen
141f76ee892STomi Valkeinen /* 15.5.9.1.2 */
142f76ee892STomi Valkeinen t->data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
143f76ee892STomi Valkeinen t->sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
144f76ee892STomi Valkeinen
145f76ee892STomi Valkeinen r = sdi_calc_clock_div(t->pixelclock, &fck, &dispc_cinfo);
146f76ee892STomi Valkeinen if (r)
147f76ee892STomi Valkeinen goto err_calc_clock_div;
148f76ee892STomi Valkeinen
149f76ee892STomi Valkeinen sdi.mgr_config.clock_info = dispc_cinfo;
150f76ee892STomi Valkeinen
151f76ee892STomi Valkeinen pck = fck / dispc_cinfo.lck_div / dispc_cinfo.pck_div;
152f76ee892STomi Valkeinen
153f76ee892STomi Valkeinen if (pck != t->pixelclock) {
154f76ee892STomi Valkeinen DSSWARN("Could not find exact pixel clock. Requested %d Hz, got %lu Hz\n",
155f76ee892STomi Valkeinen t->pixelclock, pck);
156f76ee892STomi Valkeinen
157f76ee892STomi Valkeinen t->pixelclock = pck;
158f76ee892STomi Valkeinen }
159f76ee892STomi Valkeinen
160f76ee892STomi Valkeinen
161f76ee892STomi Valkeinen dss_mgr_set_timings(out->manager, t);
162f76ee892STomi Valkeinen
163f76ee892STomi Valkeinen r = dss_set_fck_rate(fck);
164f76ee892STomi Valkeinen if (r)
165f76ee892STomi Valkeinen goto err_set_dss_clock_div;
166f76ee892STomi Valkeinen
167f76ee892STomi Valkeinen sdi_config_lcd_manager(dssdev);
168f76ee892STomi Valkeinen
169f76ee892STomi Valkeinen /*
170f76ee892STomi Valkeinen * LCLK and PCLK divisors are located in shadow registers, and we
171f76ee892STomi Valkeinen * normally write them to DISPC registers when enabling the output.
172f76ee892STomi Valkeinen * However, SDI uses pck-free as source clock for its PLL, and pck-free
173f76ee892STomi Valkeinen * is affected by the divisors. And as we need the PLL before enabling
174f76ee892STomi Valkeinen * the output, we need to write the divisors early.
175f76ee892STomi Valkeinen *
176f76ee892STomi Valkeinen * It seems just writing to the DISPC register is enough, and we don't
177f76ee892STomi Valkeinen * need to care about the shadow register mechanism for pck-free. The
178f76ee892STomi Valkeinen * exact reason for this is unknown.
179f76ee892STomi Valkeinen */
180f76ee892STomi Valkeinen dispc_mgr_set_clock_div(out->manager->id, &sdi.mgr_config.clock_info);
181f76ee892STomi Valkeinen
182f76ee892STomi Valkeinen dss_sdi_init(sdi.datapairs);
183f76ee892STomi Valkeinen r = dss_sdi_enable();
184f76ee892STomi Valkeinen if (r)
185f76ee892STomi Valkeinen goto err_sdi_enable;
186f76ee892STomi Valkeinen mdelay(2);
187f76ee892STomi Valkeinen
188f76ee892STomi Valkeinen r = dss_mgr_enable(out->manager);
189f76ee892STomi Valkeinen if (r)
190f76ee892STomi Valkeinen goto err_mgr_enable;
191f76ee892STomi Valkeinen
192f76ee892STomi Valkeinen return 0;
193f76ee892STomi Valkeinen
194f76ee892STomi Valkeinen err_mgr_enable:
195f76ee892STomi Valkeinen dss_sdi_disable();
196f76ee892STomi Valkeinen err_sdi_enable:
197f76ee892STomi Valkeinen err_set_dss_clock_div:
198f76ee892STomi Valkeinen err_calc_clock_div:
199f76ee892STomi Valkeinen dispc_runtime_put();
200f76ee892STomi Valkeinen err_get_dispc:
201f76ee892STomi Valkeinen regulator_disable(sdi.vdds_sdi_reg);
202f76ee892STomi Valkeinen err_reg_enable:
203f76ee892STomi Valkeinen return r;
204f76ee892STomi Valkeinen }
205f76ee892STomi Valkeinen
sdi_display_disable(struct omap_dss_device * dssdev)206f76ee892STomi Valkeinen static void sdi_display_disable(struct omap_dss_device *dssdev)
207f76ee892STomi Valkeinen {
208f76ee892STomi Valkeinen struct omap_overlay_manager *mgr = sdi.output.manager;
209f76ee892STomi Valkeinen
210f76ee892STomi Valkeinen dss_mgr_disable(mgr);
211f76ee892STomi Valkeinen
212f76ee892STomi Valkeinen dss_sdi_disable();
213f76ee892STomi Valkeinen
214f76ee892STomi Valkeinen dispc_runtime_put();
215f76ee892STomi Valkeinen
216f76ee892STomi Valkeinen regulator_disable(sdi.vdds_sdi_reg);
217f76ee892STomi Valkeinen }
218f76ee892STomi Valkeinen
sdi_set_timings(struct omap_dss_device * dssdev,struct omap_video_timings * timings)219f76ee892STomi Valkeinen static void sdi_set_timings(struct omap_dss_device *dssdev,
220f76ee892STomi Valkeinen struct omap_video_timings *timings)
221f76ee892STomi Valkeinen {
222f76ee892STomi Valkeinen sdi.timings = *timings;
223f76ee892STomi Valkeinen }
224f76ee892STomi Valkeinen
sdi_get_timings(struct omap_dss_device * dssdev,struct omap_video_timings * timings)225f76ee892STomi Valkeinen static void sdi_get_timings(struct omap_dss_device *dssdev,
226f76ee892STomi Valkeinen struct omap_video_timings *timings)
227f76ee892STomi Valkeinen {
228f76ee892STomi Valkeinen *timings = sdi.timings;
229f76ee892STomi Valkeinen }
230f76ee892STomi Valkeinen
sdi_check_timings(struct omap_dss_device * dssdev,struct omap_video_timings * timings)231f76ee892STomi Valkeinen static int sdi_check_timings(struct omap_dss_device *dssdev,
232f76ee892STomi Valkeinen struct omap_video_timings *timings)
233f76ee892STomi Valkeinen {
234f76ee892STomi Valkeinen struct omap_overlay_manager *mgr = sdi.output.manager;
235f76ee892STomi Valkeinen
236f76ee892STomi Valkeinen if (mgr && !dispc_mgr_timings_ok(mgr->id, timings))
237f76ee892STomi Valkeinen return -EINVAL;
238f76ee892STomi Valkeinen
239f76ee892STomi Valkeinen if (timings->pixelclock == 0)
240f76ee892STomi Valkeinen return -EINVAL;
241f76ee892STomi Valkeinen
242f76ee892STomi Valkeinen return 0;
243f76ee892STomi Valkeinen }
244f76ee892STomi Valkeinen
sdi_set_datapairs(struct omap_dss_device * dssdev,int datapairs)245f76ee892STomi Valkeinen static void sdi_set_datapairs(struct omap_dss_device *dssdev, int datapairs)
246f76ee892STomi Valkeinen {
247f76ee892STomi Valkeinen sdi.datapairs = datapairs;
248f76ee892STomi Valkeinen }
249f76ee892STomi Valkeinen
sdi_init_regulator(void)250f76ee892STomi Valkeinen static int sdi_init_regulator(void)
251f76ee892STomi Valkeinen {
252f76ee892STomi Valkeinen struct regulator *vdds_sdi;
253f76ee892STomi Valkeinen
254f76ee892STomi Valkeinen if (sdi.vdds_sdi_reg)
255f76ee892STomi Valkeinen return 0;
256f76ee892STomi Valkeinen
257f76ee892STomi Valkeinen vdds_sdi = devm_regulator_get(&sdi.pdev->dev, "vdds_sdi");
258f76ee892STomi Valkeinen if (IS_ERR(vdds_sdi)) {
259f76ee892STomi Valkeinen if (PTR_ERR(vdds_sdi) != -EPROBE_DEFER)
260f76ee892STomi Valkeinen DSSERR("can't get VDDS_SDI regulator\n");
261f76ee892STomi Valkeinen return PTR_ERR(vdds_sdi);
262f76ee892STomi Valkeinen }
263f76ee892STomi Valkeinen
264f76ee892STomi Valkeinen sdi.vdds_sdi_reg = vdds_sdi;
265f76ee892STomi Valkeinen
266f76ee892STomi Valkeinen return 0;
267f76ee892STomi Valkeinen }
268f76ee892STomi Valkeinen
sdi_connect(struct omap_dss_device * dssdev,struct omap_dss_device * dst)269f76ee892STomi Valkeinen static int sdi_connect(struct omap_dss_device *dssdev,
270f76ee892STomi Valkeinen struct omap_dss_device *dst)
271f76ee892STomi Valkeinen {
272f76ee892STomi Valkeinen struct omap_overlay_manager *mgr;
273f76ee892STomi Valkeinen int r;
274f76ee892STomi Valkeinen
275f76ee892STomi Valkeinen r = sdi_init_regulator();
276f76ee892STomi Valkeinen if (r)
277f76ee892STomi Valkeinen return r;
278f76ee892STomi Valkeinen
279f76ee892STomi Valkeinen mgr = omap_dss_get_overlay_manager(dssdev->dispc_channel);
280f76ee892STomi Valkeinen if (!mgr)
281f76ee892STomi Valkeinen return -ENODEV;
282f76ee892STomi Valkeinen
283f76ee892STomi Valkeinen r = dss_mgr_connect(mgr, dssdev);
284f76ee892STomi Valkeinen if (r)
285f76ee892STomi Valkeinen return r;
286f76ee892STomi Valkeinen
287f76ee892STomi Valkeinen r = omapdss_output_set_device(dssdev, dst);
288f76ee892STomi Valkeinen if (r) {
289f76ee892STomi Valkeinen DSSERR("failed to connect output to new device: %s\n",
290f76ee892STomi Valkeinen dst->name);
291f76ee892STomi Valkeinen dss_mgr_disconnect(mgr, dssdev);
292f76ee892STomi Valkeinen return r;
293f76ee892STomi Valkeinen }
294f76ee892STomi Valkeinen
295f76ee892STomi Valkeinen return 0;
296f76ee892STomi Valkeinen }
297f76ee892STomi Valkeinen
sdi_disconnect(struct omap_dss_device * dssdev,struct omap_dss_device * dst)298f76ee892STomi Valkeinen static void sdi_disconnect(struct omap_dss_device *dssdev,
299f76ee892STomi Valkeinen struct omap_dss_device *dst)
300f76ee892STomi Valkeinen {
301f76ee892STomi Valkeinen WARN_ON(dst != dssdev->dst);
302f76ee892STomi Valkeinen
303f76ee892STomi Valkeinen if (dst != dssdev->dst)
304f76ee892STomi Valkeinen return;
305f76ee892STomi Valkeinen
306f76ee892STomi Valkeinen omapdss_output_unset_device(dssdev);
307f76ee892STomi Valkeinen
308f76ee892STomi Valkeinen if (dssdev->manager)
309f76ee892STomi Valkeinen dss_mgr_disconnect(dssdev->manager, dssdev);
310f76ee892STomi Valkeinen }
311f76ee892STomi Valkeinen
312f76ee892STomi Valkeinen static const struct omapdss_sdi_ops sdi_ops = {
313f76ee892STomi Valkeinen .connect = sdi_connect,
314f76ee892STomi Valkeinen .disconnect = sdi_disconnect,
315f76ee892STomi Valkeinen
316f76ee892STomi Valkeinen .enable = sdi_display_enable,
317f76ee892STomi Valkeinen .disable = sdi_display_disable,
318f76ee892STomi Valkeinen
319f76ee892STomi Valkeinen .check_timings = sdi_check_timings,
320f76ee892STomi Valkeinen .set_timings = sdi_set_timings,
321f76ee892STomi Valkeinen .get_timings = sdi_get_timings,
322f76ee892STomi Valkeinen
323f76ee892STomi Valkeinen .set_datapairs = sdi_set_datapairs,
324f76ee892STomi Valkeinen };
325f76ee892STomi Valkeinen
sdi_init_output(struct platform_device * pdev)326f76ee892STomi Valkeinen static void sdi_init_output(struct platform_device *pdev)
327f76ee892STomi Valkeinen {
328f76ee892STomi Valkeinen struct omap_dss_device *out = &sdi.output;
329f76ee892STomi Valkeinen
330f76ee892STomi Valkeinen out->dev = &pdev->dev;
331f76ee892STomi Valkeinen out->id = OMAP_DSS_OUTPUT_SDI;
332f76ee892STomi Valkeinen out->output_type = OMAP_DISPLAY_TYPE_SDI;
333f76ee892STomi Valkeinen out->name = "sdi.0";
334f76ee892STomi Valkeinen out->dispc_channel = OMAP_DSS_CHANNEL_LCD;
335f76ee892STomi Valkeinen /* We have SDI only on OMAP3, where it's on port 1 */
336f76ee892STomi Valkeinen out->port_num = 1;
337f76ee892STomi Valkeinen out->ops.sdi = &sdi_ops;
338f76ee892STomi Valkeinen out->owner = THIS_MODULE;
339f76ee892STomi Valkeinen
340f76ee892STomi Valkeinen omapdss_register_output(out);
341f76ee892STomi Valkeinen }
342f76ee892STomi Valkeinen
sdi_uninit_output(struct platform_device * pdev)343f76ee892STomi Valkeinen static void sdi_uninit_output(struct platform_device *pdev)
344f76ee892STomi Valkeinen {
345f76ee892STomi Valkeinen struct omap_dss_device *out = &sdi.output;
346f76ee892STomi Valkeinen
347f76ee892STomi Valkeinen omapdss_unregister_output(out);
348f76ee892STomi Valkeinen }
349f76ee892STomi Valkeinen
sdi_bind(struct device * dev,struct device * master,void * data)350f76ee892STomi Valkeinen static int sdi_bind(struct device *dev, struct device *master, void *data)
351f76ee892STomi Valkeinen {
352f76ee892STomi Valkeinen struct platform_device *pdev = to_platform_device(dev);
353f76ee892STomi Valkeinen
354f76ee892STomi Valkeinen sdi.pdev = pdev;
355f76ee892STomi Valkeinen
356f76ee892STomi Valkeinen sdi_init_output(pdev);
357f76ee892STomi Valkeinen
358f76ee892STomi Valkeinen return 0;
359f76ee892STomi Valkeinen }
360f76ee892STomi Valkeinen
sdi_unbind(struct device * dev,struct device * master,void * data)361f76ee892STomi Valkeinen static void sdi_unbind(struct device *dev, struct device *master, void *data)
362f76ee892STomi Valkeinen {
363f76ee892STomi Valkeinen struct platform_device *pdev = to_platform_device(dev);
364f76ee892STomi Valkeinen
365f76ee892STomi Valkeinen sdi_uninit_output(pdev);
366f76ee892STomi Valkeinen }
367f76ee892STomi Valkeinen
368f76ee892STomi Valkeinen static const struct component_ops sdi_component_ops = {
369f76ee892STomi Valkeinen .bind = sdi_bind,
370f76ee892STomi Valkeinen .unbind = sdi_unbind,
371f76ee892STomi Valkeinen };
372f76ee892STomi Valkeinen
sdi_probe(struct platform_device * pdev)373f76ee892STomi Valkeinen static int sdi_probe(struct platform_device *pdev)
374f76ee892STomi Valkeinen {
375f76ee892STomi Valkeinen return component_add(&pdev->dev, &sdi_component_ops);
376f76ee892STomi Valkeinen }
377f76ee892STomi Valkeinen
sdi_remove(struct platform_device * pdev)378*dc6b77baSUwe Kleine-König static void sdi_remove(struct platform_device *pdev)
379f76ee892STomi Valkeinen {
380f76ee892STomi Valkeinen component_del(&pdev->dev, &sdi_component_ops);
381f76ee892STomi Valkeinen }
382f76ee892STomi Valkeinen
383f76ee892STomi Valkeinen static struct platform_driver omap_sdi_driver = {
384f76ee892STomi Valkeinen .probe = sdi_probe,
385*dc6b77baSUwe Kleine-König .remove_new = sdi_remove,
386f76ee892STomi Valkeinen .driver = {
387f76ee892STomi Valkeinen .name = "omapdss_sdi",
388f76ee892STomi Valkeinen .suppress_bind_attrs = true,
389f76ee892STomi Valkeinen },
390f76ee892STomi Valkeinen };
391f76ee892STomi Valkeinen
sdi_init_platform_driver(void)392f76ee892STomi Valkeinen int __init sdi_init_platform_driver(void)
393f76ee892STomi Valkeinen {
394f76ee892STomi Valkeinen return platform_driver_register(&omap_sdi_driver);
395f76ee892STomi Valkeinen }
396f76ee892STomi Valkeinen
sdi_uninit_platform_driver(void)397f76ee892STomi Valkeinen void sdi_uninit_platform_driver(void)
398f76ee892STomi Valkeinen {
399f76ee892STomi Valkeinen platform_driver_unregister(&omap_sdi_driver);
400f76ee892STomi Valkeinen }
401f76ee892STomi Valkeinen
sdi_init_port(struct platform_device * pdev,struct device_node * port)402f76ee892STomi Valkeinen int sdi_init_port(struct platform_device *pdev, struct device_node *port)
403f76ee892STomi Valkeinen {
404f76ee892STomi Valkeinen struct device_node *ep;
405f76ee892STomi Valkeinen u32 datapairs;
406f76ee892STomi Valkeinen int r;
407f76ee892STomi Valkeinen
408f76ee892STomi Valkeinen ep = omapdss_of_get_next_endpoint(port, NULL);
409f76ee892STomi Valkeinen if (!ep)
410f76ee892STomi Valkeinen return 0;
411f76ee892STomi Valkeinen
412f76ee892STomi Valkeinen r = of_property_read_u32(ep, "datapairs", &datapairs);
413f76ee892STomi Valkeinen if (r) {
414f76ee892STomi Valkeinen DSSERR("failed to parse datapairs\n");
415f76ee892STomi Valkeinen goto err_datapairs;
416f76ee892STomi Valkeinen }
417f76ee892STomi Valkeinen
418f76ee892STomi Valkeinen sdi.datapairs = datapairs;
419f76ee892STomi Valkeinen
420f76ee892STomi Valkeinen of_node_put(ep);
421f76ee892STomi Valkeinen
422f76ee892STomi Valkeinen sdi.pdev = pdev;
423f76ee892STomi Valkeinen
424f76ee892STomi Valkeinen sdi_init_output(pdev);
425f76ee892STomi Valkeinen
426f76ee892STomi Valkeinen sdi.port_initialized = true;
427f76ee892STomi Valkeinen
428f76ee892STomi Valkeinen return 0;
429f76ee892STomi Valkeinen
430f76ee892STomi Valkeinen err_datapairs:
431f76ee892STomi Valkeinen of_node_put(ep);
432f76ee892STomi Valkeinen
433f76ee892STomi Valkeinen return r;
434f76ee892STomi Valkeinen }
435f76ee892STomi Valkeinen
sdi_uninit_port(struct device_node * port)436f76ee892STomi Valkeinen void sdi_uninit_port(struct device_node *port)
437f76ee892STomi Valkeinen {
438f76ee892STomi Valkeinen if (!sdi.port_initialized)
439f76ee892STomi Valkeinen return;
440f76ee892STomi Valkeinen
441f76ee892STomi Valkeinen sdi_uninit_output(sdi.pdev);
442f76ee892STomi Valkeinen }
443