From: Sandor Yu <R01008@freescale.com>
Date: Wed, 4 Sep 2013 07:45:00 +0000 (+0800)
Subject: ENGR00277843-02 imx6sl: Enable sii902x hdmi function
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=6708e9116ba29bc33373b9d714a9fb8245b45c57;p=karo-tx-linux.git

ENGR00277843-02 imx6sl: Enable sii902x hdmi function

- Add sii902x hdmi chip driver.
- Sii902x initialized as I2C device.
- Support resolution change by application or FB command line.
- Max support resolution 1080p60.
- Support read EDID from hdmi sink.
- Support hdmi cable hotplug.
- Support default video mode read from dts.

Signed-off-by: Sandor Yu <R01008@freescale.com>
---

diff --git a/drivers/video/mxc/Kconfig b/drivers/video/mxc/Kconfig
index e1f5627830e8..759ff096826c 100644
--- a/drivers/video/mxc/Kconfig
+++ b/drivers/video/mxc/Kconfig
@@ -57,3 +57,7 @@ config FB_MXC_EINK_AUTO_UPDATE_MODE
     bool "E-Ink Auto-update Mode Support"
     default n
     depends on FB_MXC_EINK_PANEL
+
+config FB_MXS_SII902X
+	tristate "Si Image SII9022 DVI/HDMI Interface Chip"
+	depends on FB_MXS && I2C
diff --git a/drivers/video/mxc/Makefile b/drivers/video/mxc/Makefile
index f8b589c4ec42..6a5b855dbafa 100644
--- a/drivers/video/mxc/Makefile
+++ b/drivers/video/mxc/Makefile
@@ -5,3 +5,4 @@ obj-$(CONFIG_FB_MXC_HDMI)			+= mxc_hdmi.o
 obj-$(CONFIG_FB_MXC_EDID)			+= mxc_edid.o
 obj-$(CONFIG_FB_MXC_SYNC_PANEL) += mxc_dispdrv.o mxc_lcdif.o mxc_ipuv3_fb.o
 obj-$(CONFIG_FB_MXC_EINK_PANEL)             += mxc_epdc_fb.o
+obj-$(CONFIG_FB_MXS_SII902X) += mxsfb_sii902x.o
diff --git a/drivers/video/mxc/mxsfb_sii902x.c b/drivers/video/mxc/mxsfb_sii902x.c
new file mode 100644
index 000000000000..531d3f66a116
--- /dev/null
+++ b/drivers/video/mxc/mxsfb_sii902x.c
@@ -0,0 +1,532 @@
+/*
+ * Copyright (C) 2010-2013 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/*!
+ * @defgroup Framebuffer Framebuffer Driver for Sii902x.
+ */
+
+/*!
+ * @file mxsfb_sii902x.c
+ *
+ * @brief  Frame buffer driver for SII902x
+ *
+ * @ingroup Framebuffer
+ */
+
+/*!
+ * Include files
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/i2c.h>
+#include <linux/fsl_devices.h>
+#include <linux/interrupt.h>
+#include <linux/reset.h>
+#include <asm/mach-types.h>
+#include <video/mxc_edid.h>
+
+#define SII_EDID_LEN	512
+#define DRV_NAME "sii902x"
+
+struct sii902x_data {
+	struct i2c_client *client;
+	struct delayed_work det_work;
+	struct fb_info *fbi;
+	struct mxc_edid_cfg edid_cfg;
+	u8 cable_plugin;
+	u8 edid[SII_EDID_LEN];
+	bool waiting_for_fb;
+	bool dft_mode_set;
+	const char *mode_str;
+	int bits_per_pixel;
+} sii902x;
+
+static void sii902x_poweron(void);
+static void sii902x_poweroff(void);
+
+#ifdef DEBUG
+static void dump_fb_videomode(struct fb_videomode *m)
+{
+	pr_debug("fb_videomode = %d %d %d %d %d %d %d %d %d %d %d %d %d\n",
+		m->refresh, m->xres, m->yres, m->pixclock, m->left_margin,
+		m->right_margin, m->upper_margin, m->lower_margin,
+		m->hsync_len, m->vsync_len, m->sync, m->vmode, m->flag);
+}
+#else
+static void dump_fb_videomode(struct fb_videomode *m)
+{}
+#endif
+
+static __attribute__ ((unused)) void dump_regs(u8 reg, int len)
+{
+	u8 buf[50];
+	int i;
+
+	i2c_smbus_read_i2c_block_data(sii902x.client, reg, len, buf);
+	for (i = 0; i < len; i++)
+		dev_dbg(&sii902x.client->dev, "reg[0x%02X]: 0x%02X\n",
+				i+reg, buf[i]);
+}
+
+static ssize_t sii902x_show_name(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	strcpy(buf, sii902x.fbi->fix.id);
+	sprintf(buf+strlen(buf), "\n");
+
+	return strlen(buf);
+}
+
+static DEVICE_ATTR(fb_name, S_IRUGO, sii902x_show_name, NULL);
+
+static ssize_t sii902x_show_state(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	if (sii902x.cable_plugin == 0)
+		strcpy(buf, "plugout\n");
+	else
+		strcpy(buf, "plugin\n");
+
+	return strlen(buf);
+}
+
+static DEVICE_ATTR(cable_state, S_IRUGO, sii902x_show_state, NULL);
+
+static ssize_t sii902x_show_edid(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	int i, j, len = 0;
+
+	for (j = 0; j < SII_EDID_LEN/16; j++) {
+		for (i = 0; i < 16; i++)
+			len += sprintf(buf+len, "0x%02X ",
+					sii902x.edid[j*16 + i]);
+		len += sprintf(buf+len, "\n");
+	}
+
+	return len;
+}
+
+static DEVICE_ATTR(edid, S_IRUGO, sii902x_show_edid, NULL);
+
+static void sii902x_setup(struct fb_info *fbi)
+{
+	u16 data[4];
+	u32 refresh;
+	u8 *tmp;
+	int i;
+
+	dev_dbg(&sii902x.client->dev, "Sii902x: setup..\n");
+
+	/* Power up */
+	i2c_smbus_write_byte_data(sii902x.client, 0x1E, 0x00);
+
+	/* set TPI video mode */
+	data[0] = PICOS2KHZ(fbi->var.pixclock) / 10;
+	data[2] = fbi->var.hsync_len + fbi->var.left_margin +
+		  fbi->var.xres + fbi->var.right_margin;
+	data[3] = fbi->var.vsync_len + fbi->var.upper_margin +
+		  fbi->var.yres + fbi->var.lower_margin;
+	refresh = data[2] * data[3];
+	refresh = (PICOS2KHZ(fbi->var.pixclock) * 1000) / refresh;
+	data[1] = refresh * 100;
+	tmp = (u8 *)data;
+	for (i = 0; i < 8; i++)
+		i2c_smbus_write_byte_data(sii902x.client, i, tmp[i]);
+
+	/* input bus/pixel: full pixel wide (24bit), rising edge */
+	i2c_smbus_write_byte_data(sii902x.client, 0x08, 0x70);
+	/* Set input format to RGB */
+	i2c_smbus_write_byte_data(sii902x.client, 0x09, 0x00);
+	/* set output format to RGB */
+	i2c_smbus_write_byte_data(sii902x.client, 0x0A, 0x00);
+	/* audio setup */
+	i2c_smbus_write_byte_data(sii902x.client, 0x25, 0x00);
+	i2c_smbus_write_byte_data(sii902x.client, 0x26, 0x40);
+	i2c_smbus_write_byte_data(sii902x.client, 0x27, 0x00);
+}
+
+#ifdef CONFIG_FB_MODE_HELPERS
+static int sii902x_read_edid(struct fb_info *fbi)
+{
+	int old, dat, ret, cnt = 100;
+	unsigned short addr = 0x50;
+
+	dev_dbg(&sii902x.client->dev, "%s\n", __func__);
+
+	old = i2c_smbus_read_byte_data(sii902x.client, 0x1A);
+
+	i2c_smbus_write_byte_data(sii902x.client, 0x1A, old | 0x4);
+	do {
+		cnt--;
+		msleep(10);
+		dat = i2c_smbus_read_byte_data(sii902x.client, 0x1A);
+	} while ((!(dat & 0x2)) && cnt);
+
+	if (!cnt) {
+		ret = -1;
+		goto done;
+	}
+
+	i2c_smbus_write_byte_data(sii902x.client, 0x1A, old | 0x06);
+
+	/* edid reading */
+	ret = mxc_edid_read(sii902x.client->adapter, addr,
+				sii902x.edid, &sii902x.edid_cfg, fbi);
+
+	cnt = 100;
+	do {
+		cnt--;
+		i2c_smbus_write_byte_data(sii902x.client, 0x1A, old & ~0x6);
+		msleep(10);
+		dat = i2c_smbus_read_byte_data(sii902x.client, 0x1A);
+	} while ((dat & 0x6) && cnt);
+
+	if (!cnt)
+		ret = -1;
+
+done:
+
+	i2c_smbus_write_byte_data(sii902x.client, 0x1A, old);
+	return ret;
+}
+#else
+static int sii902x_read_edid(struct fb_info *fbi)
+{
+	return -1;
+}
+#endif
+
+static void sii902x_cable_connected(void)
+{
+	int i;
+	const struct fb_videomode *mode;
+	struct fb_videomode m;
+
+	if (sii902x_read_edid(sii902x.fbi) < 0)
+		dev_err(&sii902x.client->dev,
+			"Sii902x: read edid fail\n");
+	else {
+		if (sii902x.fbi->monspecs.modedb_len > 0) {
+
+			fb_destroy_modelist(&sii902x.fbi->modelist);
+
+			for (i = 0; i < sii902x.fbi->monspecs.modedb_len; i++) {
+
+				mode = &sii902x.fbi->monspecs.modedb[i];
+
+				if (!(mode->vmode & FB_VMODE_INTERLACED)) {
+
+					dev_dbg(&sii902x.client->dev, "Added mode %d:", i);
+					dev_dbg(&sii902x.client->dev,
+						"xres = %d, yres = %d, freq = %d, vmode = %d, flag = %d\n",
+						mode->xres, mode->yres, mode->refresh,
+						mode->vmode, mode->flag);
+
+					fb_add_videomode(mode, &sii902x.fbi->modelist);
+				}
+			}
+
+			/* Set the default mode only once. */
+			if (!sii902x.dft_mode_set &&
+					sii902x.mode_str && sii902x.bits_per_pixel) {
+
+				dev_dbg(&sii902x.client->dev, "%s: setting to default=%s bpp=%d\n",
+						__func__, sii902x.mode_str, sii902x.bits_per_pixel);
+
+				fb_find_mode(&sii902x.fbi->var, sii902x.fbi,
+						sii902x.mode_str, NULL, 0, NULL,
+						sii902x.bits_per_pixel);
+
+				sii902x.dft_mode_set = true;
+			}
+
+			fb_var_to_videomode(&m, &sii902x.fbi->var);
+			dump_fb_videomode(&m);
+
+			mode = fb_find_nearest_mode(&m,
+					&sii902x.fbi->modelist);
+
+			/* update fbi mode  */
+			sii902x.fbi->mode = (struct fb_videomode *)mode;
+
+			fb_videomode_to_var(&sii902x.fbi->var, mode);
+
+			sii902x.fbi->var.activate |= FB_ACTIVATE_FORCE;
+			console_lock();
+			sii902x.fbi->flags |= FBINFO_MISC_USEREVENT;
+			fb_set_var(sii902x.fbi, &sii902x.fbi->var);
+			sii902x.fbi->flags &= ~FBINFO_MISC_USEREVENT;
+			console_unlock();
+		}
+		/* Power on sii902x */
+		sii902x_poweron();
+	}
+}
+
+static void det_worker(struct work_struct *work)
+{
+	int dat;
+	char event_string[16];
+	char *envp[] = { event_string, NULL };
+
+	dev_dbg(&sii902x.client->dev, "%s\n", __func__);
+
+	dat = i2c_smbus_read_byte_data(sii902x.client, 0x3D);
+	if (dat & 0x1) {
+		/* cable connection changes */
+		if (dat & 0x4) {
+			sii902x.cable_plugin = 1;
+			dev_dbg(&sii902x.client->dev, "EVENT=plugin\n");
+			sprintf(event_string, "EVENT=plugin");
+			sii902x_cable_connected();
+		} else {
+			sii902x.cable_plugin = 0;
+			dev_dbg(&sii902x.client->dev, "EVENT=plugout\n");
+			sprintf(event_string, "EVENT=plugout");
+			/* Power off sii902x */
+			sii902x_poweroff();
+		}
+		kobject_uevent_env(&sii902x.client->dev.kobj, KOBJ_CHANGE, envp);
+	}
+	i2c_smbus_write_byte_data(sii902x.client, 0x3D, dat);
+
+	dev_dbg(&sii902x.client->dev, "exit %s\n", __func__);
+
+}
+
+static irqreturn_t sii902x_detect_handler(int irq, void *data)
+{
+	if (sii902x.fbi)
+		schedule_delayed_work(&(sii902x.det_work), msecs_to_jiffies(20));
+	else
+		sii902x.waiting_for_fb = true;
+
+	return IRQ_HANDLED;
+}
+
+static int sii902x_fb_event(struct notifier_block *nb, unsigned long val, void *v)
+{
+	struct fb_event *event = v;
+	struct fb_info *fbi = event->info;
+
+	dev_dbg(&sii902x.client->dev, "%s event=0x%lx\n", __func__, val);
+
+	switch (val) {
+	case FB_EVENT_FB_REGISTERED:
+		if (sii902x.fbi == NULL) {
+			sii902x.fbi = fbi;
+			if (sii902x.waiting_for_fb)
+				det_worker(NULL);
+		}
+		fb_show_logo(fbi, 0);
+		break;
+	case FB_EVENT_MODE_CHANGE:
+		sii902x_setup(fbi);
+		break;
+	case FB_EVENT_BLANK:
+		if (*((int *)event->data) == FB_BLANK_UNBLANK) {
+			dev_dbg(&sii902x.client->dev, "FB_BLANK_UNBLANK\n");
+			sii902x_poweron();
+		} else {
+			dev_dbg(&sii902x.client->dev, "FB_BLANK_BLANK\n");
+			sii902x_poweroff();
+		}
+		break;
+	}
+	return 0;
+}
+
+static struct notifier_block nb = {
+	.notifier_call = sii902x_fb_event,
+};
+
+static int mxsfb_get_of_property(void)
+{
+	struct device_node *np = sii902x.client->dev.of_node;
+	const char *mode_str;
+	int bits_per_pixel, ret;
+
+	ret = of_property_read_string(np, "mode_str", &mode_str);
+	if (ret < 0) {
+		dev_warn(&sii902x.client->dev, "get of property mode_str fail\n");
+		return ret;
+	}
+	ret = of_property_read_u32(np, "bits-per-pixel", &bits_per_pixel);
+	if (ret) {
+		dev_warn(&sii902x.client->dev, "get of property bpp fail\n");
+		return ret;
+	}
+
+	sii902x.mode_str = mode_str;
+	sii902x.bits_per_pixel = bits_per_pixel;
+
+	return ret;
+}
+
+static int sii902x_probe(struct i2c_client *client,
+		const struct i2c_device_id *id)
+{
+	int i, dat, ret;
+	struct fb_info edid_fbi;
+
+	memset(&sii902x, 0, sizeof(sii902x));
+
+	sii902x.client = client;
+
+	dev_dbg(&sii902x.client->dev, "%s\n", __func__);;
+
+	/* Reset sii902x */
+	ret = device_reset(&sii902x.client->dev);
+	if (ret) {
+		dev_err(&sii902x.client->dev, "failed to reset: %d\n", ret);
+		return -ENODEV;
+	}
+
+	/* Set 902x in hardware TPI mode on and jump out of D3 state */
+	if (i2c_smbus_write_byte_data(sii902x.client, 0xc7, 0x00) < 0) {
+		dev_err(&sii902x.client->dev,
+			"Sii902x: cound not find device\n");
+		return -ENODEV;
+	}
+
+	/* read device ID */
+	for (i = 10; i > 0; i--) {
+		dat = i2c_smbus_read_byte_data(sii902x.client, 0x1B);
+		printk(KERN_DEBUG "Sii902x: read id = 0x%02X", dat);
+		if (dat == 0xb0) {
+			dat = i2c_smbus_read_byte_data(sii902x.client, 0x1C);
+			printk(KERN_DEBUG "-0x%02X", dat);
+			dat = i2c_smbus_read_byte_data(sii902x.client, 0x1D);
+			printk(KERN_DEBUG "-0x%02X", dat);
+			dat = i2c_smbus_read_byte_data(sii902x.client, 0x30);
+			printk(KERN_DEBUG "-0x%02X\n", dat);
+			break;
+		}
+	}
+	if (i == 0) {
+		dev_err(&sii902x.client->dev,
+			"Sii902x: cound not find device\n");
+		return -ENODEV;
+	}
+
+	/* try to read edid */
+	ret = sii902x_read_edid(&edid_fbi);
+	if (ret < 0)
+		dev_warn(&sii902x.client->dev, "Can not read edid\n");
+
+	if (sii902x.client->irq) {
+		ret = request_irq(sii902x.client->irq, sii902x_detect_handler,
+				IRQF_TRIGGER_FALLING,
+				"SII902x_det", &sii902x);
+		if (ret < 0)
+			dev_warn(&sii902x.client->dev,
+				"Sii902x: cound not request det irq %d\n",
+				sii902x.client->irq);
+		else {
+			/*enable cable hot plug irq*/
+			i2c_smbus_write_byte_data(sii902x.client, 0x3c, 0x01);
+			INIT_DELAYED_WORK(&(sii902x.det_work), det_worker);
+		}
+		ret = device_create_file(&sii902x.client->dev, &dev_attr_fb_name);
+		if (ret < 0)
+			dev_warn(&sii902x.client->dev,
+				"Sii902x: cound not create sys node for fb name\n");
+		ret = device_create_file(&sii902x.client->dev, &dev_attr_cable_state);
+		if (ret < 0)
+			dev_warn(&sii902x.client->dev,
+				"Sii902x: cound not create sys node for cable state\n");
+		ret = device_create_file(&sii902x.client->dev, &dev_attr_edid);
+		if (ret < 0)
+			dev_warn(&sii902x.client->dev,
+				"Sii902x: cound not create sys node for edid\n");
+
+	}
+
+	mxsfb_get_of_property();
+	fb_register_client(&nb);
+
+	return 0;
+}
+
+static int sii902x_remove(struct i2c_client *client)
+{
+	fb_unregister_client(&nb);
+	sii902x_poweroff();
+
+	return 0;
+}
+
+static void sii902x_poweron(void)
+{
+	/* Turn on DVI or HDMI */
+	if (sii902x.edid_cfg.hdmi_cap)
+		i2c_smbus_write_byte_data(sii902x.client, 0x1A, 0x01);
+	else
+		i2c_smbus_write_byte_data(sii902x.client, 0x1A, 0x00);
+	return;
+}
+
+static void sii902x_poweroff(void)
+{
+	/* disable tmds before changing resolution */
+	if (sii902x.edid_cfg.hdmi_cap)
+		i2c_smbus_write_byte_data(sii902x.client, 0x1A, 0x11);
+	else
+		i2c_smbus_write_byte_data(sii902x.client, 0x1A, 0x10);
+
+	return;
+}
+
+static const struct i2c_device_id sii902x_id[] = {
+	{ DRV_NAME, 0},
+	{ },
+};
+MODULE_DEVICE_TABLE(i2c, sii902x_id);
+
+static const struct of_device_id sii902x_dt_ids[] = {
+	{ .compatible = "SiI,sii902x", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, sii902x_dt_ids);
+
+static struct i2c_driver sii902x_driver = {
+	.driver = {
+		.name = DRV_NAME,
+		.owner = THIS_MODULE,
+		.of_match_table = sii902x_dt_ids,
+	},
+	.probe		= sii902x_probe,
+	.remove		= sii902x_remove,
+	.id_table	= sii902x_id,
+};
+
+module_i2c_driver(sii902x_driver);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("SII902x DVI/HDMI driver");
+MODULE_LICENSE("GPL");