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Date: Fri, 5 Sep 2014 12:48:37 +0800
From: Xiubo Li <Li.Xiubo@...escale.com>
To: <robh+dt@...nel.org>, <pawel.moll@....com>, <mark.rutland@....com>,
<ijc+devicetree@...lion.org.uk>, <galak@...eaurora.org>,
<plagnioj@...osoft.com>, <tomi.valkeinen@...com>,
<grant.likely@...aro.org>, <arnd@...db.de>,
<peter.griffin@...aro.org>, <jg1.han@...sung.com>,
<daniel.vetter@...ll.ch>, <laurent.pinchart@...asonboard.com>,
<robdclark@...il.com>, <linux-fbdev@...r.kernel.org>
CC: <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
Xiubo Li <Li.Xiubo@...escale.com>
Subject: [PATCH] fbdev: fsl-sii902x: HDMI support for Freescale SoCs
Some Freescale SoCs, there has an DVI/HDMI controller and a PHY,
attached to one of their display controller unit's LCDC interfaces.
This patch adds a preliminary static support for such controllers.
This will support for many modes and a dynamic switching between
them.
Signed-off-by: Xiubo Li <Li.Xiubo@...escale.com>
---
.../devicetree/bindings/video/fsl-sii902x.txt | 17 +
drivers/video/fbdev/Kconfig | 7 +
drivers/video/fbdev/Makefile | 1 +
drivers/video/fbdev/fsl-sii902x.c | 526 +++++++++++++++++++++
4 files changed, 551 insertions(+)
create mode 100644 Documentation/devicetree/bindings/video/fsl-sii902x.txt
create mode 100644 drivers/video/fbdev/fsl-sii902x.c
diff --git a/Documentation/devicetree/bindings/video/fsl-sii902x.txt b/Documentation/devicetree/bindings/video/fsl-sii902x.txt
new file mode 100644
index 0000000..55c63ad6
--- /dev/null
+++ b/Documentation/devicetree/bindings/video/fsl-sii902x.txt
@@ -0,0 +1,17 @@
+Device-Tree binding for SII902X HDMI driver
+
+Required properties:
+- compatible: Must contain "fsl,sii902x".
+- reg: I2C address of the SII902X HDMI device.
+- interrupts: One interrupt of the fb dev.
+
+Example:
+&i2c1 {
+ status = "okay";
+
+ hdmi: sii9022a@39 {
+ compatible = "fsl,sii902x";
+ reg = <0x39>;
+ interrupts = <GIC_SPI 167 IRQ_TYPE_EDGE_RISING>;
+ };
+};
diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
index ccbe2ae..946eb5c 100644
--- a/drivers/video/fbdev/Kconfig
+++ b/drivers/video/fbdev/Kconfig
@@ -1976,6 +1976,13 @@ config FB_FSL_DIU
---help---
Framebuffer driver for the Freescale SoC DIU
+config FB_FSL_SII902X
+ tristate "Si Image SII902X DVI/HDMI Interface Chip"
+ depends on FB && FSL_SOC
+ select FB_MODE_HELPERS
+ ---help---
+ Driver for the Freescale SoC's DVI/HDMI controller.
+
config FB_W100
tristate "W100 frame buffer support"
depends on FB && ARCH_PXA
diff --git a/drivers/video/fbdev/Makefile b/drivers/video/fbdev/Makefile
index 1979aff..9aeb441 100644
--- a/drivers/video/fbdev/Makefile
+++ b/drivers/video/fbdev/Makefile
@@ -110,6 +110,7 @@ obj-$(CONFIG_FB_IMX) += imxfb.o
obj-$(CONFIG_FB_S3C) += s3c-fb.o
obj-$(CONFIG_FB_S3C2410) += s3c2410fb.o
obj-$(CONFIG_FB_FSL_DIU) += fsl-diu-fb.o
+obj-$(CONFIG_FB_FSL_SII902X) += fsl-sii902x.o
obj-$(CONFIG_FB_COBALT) += cobalt_lcdfb.o
obj-$(CONFIG_FB_IBM_GXT4500) += gxt4500.o
obj-$(CONFIG_FB_PS3) += ps3fb.o
diff --git a/drivers/video/fbdev/fsl-sii902x.c b/drivers/video/fbdev/fsl-sii902x.c
new file mode 100644
index 0000000..e0fb3dd
--- /dev/null
+++ b/drivers/video/fbdev/fsl-sii902x.c
@@ -0,0 +1,526 @@
+/*
+ * Copyright (C) 2010-2014 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.
+ */
+
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/fb.h>
+#include <linux/fsl_devices.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include "edid.h"
+
+static bool g_enable_hdmi;
+
+struct sii902x_data {
+ struct i2c_client *client;
+ struct delayed_work det_work;
+ struct fb_info *fbi;
+ struct regmap *regmap;
+ unsigned int irq;
+ u8 cable_plugin;
+} *sii902x;
+
+static struct i2c_client *sii902x_to_i2c(struct sii902x_data *sii902x)
+{
+ return sii902x->client;
+}
+
+static s32 sii902x_write(const struct i2c_client *client,
+ u8 command, u8 value)
+{
+ return i2c_smbus_write_byte_data(client, command, value);
+}
+
+static s32 sii902x_read(const struct i2c_client *client, u8 command)
+{
+ int val;
+
+ val = i2c_smbus_read_word_data(client, command);
+
+ return val & 0xff;
+}
+
+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 void sii902x_power_up_tx(struct sii902x_data *sii902x)
+{
+ struct i2c_client *client = sii902x_to_i2c(sii902x);
+ int val;
+
+ val = sii902x_read(client, 0x1E);
+ val &= ~0x3;
+ sii902x_write(client, 0x1E, val);
+}
+
+static void sii902x_setup(struct fb_info *fbi)
+{
+ u16 data[4];
+ u32 refresh;
+ u8 *tmp;
+ int i;
+
+ /* Power up */
+ sii902x_power_up_tx(sii902x);
+
+ /* 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++)
+ sii902x_write(sii902x->client, i, tmp[i]);
+
+ /* input bus/pixel: full pixel wide (24bit), rising edge */
+ sii902x_write(sii902x->client, 0x08, 0x70);
+ /* Set input format to RGB */
+ sii902x_write(sii902x->client, 0x09, 0x00);
+ /* set output format to RGB */
+ sii902x_write(sii902x->client, 0x0A, 0x00);
+ /* audio setup */
+ sii902x_write(sii902x->client, 0x25, 0x00);
+ sii902x_write(sii902x->client, 0x26, 0x40);
+ sii902x_write(sii902x->client, 0x27, 0x00);
+}
+
+static int __sii902x_read_edid(struct i2c_adapter *adp,
+ unsigned char *edid, u8 *buf)
+{
+ unsigned short addr = 0x50;
+ int ret;
+
+ struct i2c_msg msg[2] = {
+ {
+ .addr = addr,
+ .flags = 0,
+ .len = 1,
+ .buf = buf,
+ }, {
+ .addr = addr,
+ .flags = I2C_M_RD,
+ .len = EDID_LENGTH,
+ .buf = edid,
+ },
+ };
+
+ if (adp == NULL)
+ return -EINVAL;
+
+ memset(edid, 0, EDID_LENGTH);
+
+ ret = i2c_transfer(adp, msg, 2);
+ if (ret < 0)
+ return ret;
+
+ /* If 0x50 fails, try 0x37. */
+ if (edid[1] == 0x00) {
+ msg[0].addr = msg[1].addr = 0x37;
+ ret = i2c_transfer(adp, msg, 2);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (edid[1] == 0x00)
+ return -ENOENT;
+
+ return 0;
+}
+/* make sure edid has 256 bytes*/
+static int __sii902x_get_edid(struct i2c_adapter *adp,
+ struct fb_info *fbi)
+{
+ u8 *edid;
+ u8 buf[2] = {0, 0};
+ int num, ret;
+
+ edid = kzalloc(EDID_LENGTH, GFP_KERNEL);
+ if (!edid)
+ return -ENOMEM;
+
+ ret = __sii902x_read_edid(adp, edid, buf);
+ if (ret)
+ return ret;
+
+ /* edid first block parsing */
+ memset(&fbi->monspecs, 0, sizeof(fbi->monspecs));
+ fb_edid_to_monspecs(edid, &fbi->monspecs);
+
+ /* need read ext block? Only support one more blk now */
+ num = edid[0x7E];
+ if (num) {
+ buf[0] = 0x80;
+ ret = __sii902x_read_edid(adp, edid, buf);
+ if (ret)
+ return ret;
+
+ fb_edid_add_monspecs(edid, &fbi->monspecs);
+ }
+
+ kfree(edid);
+ return 0;
+}
+static int sii902x_get_edid(struct fb_info *fbi)
+{
+ int old, dat, ret, cnt = 100;
+
+ old = sii902x_read(sii902x->client, 0x1A);
+
+ sii902x_write(sii902x->client, 0x1A, old | 0x4);
+ do {
+ cnt--;
+ msleep(20);
+ dat = sii902x_read(sii902x->client, 0x1A);
+ } while ((!(dat & 0x2)) && cnt);
+
+ if (!cnt) {
+ ret = -1;
+ goto done;
+ }
+
+ sii902x_write(sii902x->client, 0x1A, old | 0x06);
+
+ /* edid reading */
+ ret = __sii902x_get_edid(sii902x->client->adapter, fbi);
+
+ cnt = 100;
+ do {
+ cnt--;
+ sii902x_write(sii902x->client, 0x1A, old & ~0x6);
+ msleep(20);
+ dat = sii902x_read(sii902x->client, 0x1A);
+ } while ((dat & 0x6) && cnt);
+
+ if (!cnt)
+ ret = -1;
+
+done:
+ sii902x_write(sii902x->client, 0x1A, old);
+ return ret;
+}
+
+static void det_worker(struct work_struct *work)
+{
+ struct fb_info *fbi = sii902x->fbi;
+ struct fb_monspecs *monspecs = &fbi->monspecs;
+ int val, ret;
+ char event_string[16];
+ char *envp[] = { event_string, NULL };
+
+ val = sii902x_read(sii902x->client, 0x3D);
+ if (!(val & 0x1) && !g_enable_hdmi)
+ goto err;
+
+ /* cable connection changes */
+ if (val & 0x4 || g_enable_hdmi) {
+ sii902x->cable_plugin = 1;
+ sprintf(event_string, "EVENT=plugin");
+
+ ret = sii902x_get_edid(fbi);
+ if (ret < 0) {
+ dev_err(&sii902x->client->dev, "read edid fail\n");
+ goto err;
+ }
+
+ /* make sure fb is powerdown */
+ console_lock();
+ fb_blank(fbi, FB_BLANK_POWERDOWN);
+ console_unlock();
+
+ if (monspecs->modedb_len > 0) {
+ int i;
+ const struct fb_videomode *mode;
+ struct fb_videomode m;
+
+ fb_destroy_modelist(&fbi->modelist);
+
+ for (i = 0; i < monspecs->modedb_len; i++) {
+ /* We do not support interlaced mode for now */
+ if (!(monspecs->modedb[i].vmode &
+ FB_VMODE_INTERLACED))
+ fb_add_videomode(&monspecs->modedb[i],
+ &fbi->modelist);
+ }
+
+ fb_var_to_videomode(&m, &fbi->var);
+ mode = fb_find_nearest_mode(&m,
+ &fbi->modelist);
+
+ fb_videomode_to_var(&fbi->var, mode);
+
+ fbi->var.activate |= FB_ACTIVATE_FORCE;
+ console_lock();
+ fbi->flags |= FBINFO_MISC_USEREVENT;
+ fb_set_var(fbi, &fbi->var);
+ fbi->flags &= ~FBINFO_MISC_USEREVENT;
+ console_unlock();
+ }
+
+ console_lock();
+ fb_blank(fbi, FB_BLANK_UNBLANK);
+ console_unlock();
+ } else {
+ sii902x->cable_plugin = 0;
+ sprintf(event_string, "EVENT=plugout");
+ console_lock();
+ fb_blank(fbi, FB_BLANK_POWERDOWN);
+ console_unlock();
+ }
+ kobject_uevent_env(&sii902x->client->dev.kobj,
+ KOBJ_CHANGE, envp);
+
+err:
+ sii902x_write(sii902x->client, 0x3D, val);
+}
+
+static irqreturn_t sii902x_detect_handler(int irq, void *data)
+{
+ if (g_enable_hdmi)
+ g_enable_hdmi = false;
+
+ if (sii902x->fbi)
+ schedule_delayed_work(&(sii902x->det_work),
+ msecs_to_jiffies(20));
+ return IRQ_HANDLED;
+}
+
+static void sii902x_poweron(void)
+{
+ /* Turn on DVI or HDMI */
+ sii902x_write(sii902x->client, 0x1A, 0x00);
+}
+
+static void sii902x_poweroff(void)
+{
+ /* disable tmds before changing resolution */
+ sii902x_write(sii902x->client, 0x1A, 0x10);
+}
+
+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;
+
+ switch (val) {
+ case FB_EVENT_FB_REGISTERED:
+ if (sii902x->fbi != NULL)
+ break;
+ sii902x->fbi = fbi;
+ if (g_enable_hdmi && sii902x->fbi) {
+ schedule_delayed_work(&(sii902x->det_work),
+ msecs_to_jiffies(20));
+ }
+ break;
+ case FB_EVENT_MODE_CHANGE:
+ sii902x_setup(fbi);
+ break;
+ case FB_EVENT_BLANK:
+ if (*((int *)event->data) == FB_BLANK_UNBLANK)
+ sii902x_poweron();
+ else
+ sii902x_poweroff();
+ break;
+ }
+
+ return 0;
+}
+
+static void sii902x_chip_id(struct sii902x_data *sii902x)
+{
+ struct i2c_client *client = sii902x_to_i2c(sii902x);
+ int val;
+
+ /* read device ID */
+ val = sii902x_read(client, 0x1B);
+ printk(KERN_INFO "Sii902x: read id = 0x%02X", val);
+ val = sii902x_read(client, 0x1C);
+ printk(KERN_INFO "-0x%02X", val);
+ val = sii902x_read(client, 0x1D);
+ printk(KERN_INFO "-0x%02X", val);
+ val = sii902x_read(client, 0x30);
+ printk(KERN_INFO "-0x%02X\n", val);
+}
+
+static int sii902x_initialize(struct sii902x_data *sii902x)
+{
+ struct i2c_client *client = sii902x_to_i2c(sii902x);
+ int ret, cnt;
+
+ for (cnt = 0; cnt < 5; cnt++) {
+ /* Set 902x in hardware TPI mode on and jump out of D3 state */
+ ret = sii902x_write(client, 0xC7, 0x00);
+ if (ret < 0)
+ break;
+ }
+ if (0 != ret)
+ dev_err(&client->dev, "cound not find device\n");
+
+ return ret;
+}
+
+static void sii902x_enable_source(struct sii902x_data *sii902x)
+{
+ struct i2c_client *client = sii902x_to_i2c(sii902x);
+ int val;
+
+ sii902x_write(client, 0xBC, 0x01);
+ sii902x_write(client, 0xBD, 0x82);
+ val = sii902x_read(client, 0xBE);
+ val |= 0x1;
+ sii902x_write(client, 0xBE, val);
+}
+
+static struct notifier_block nb = {
+ .notifier_call = sii902x_fb_event,
+};
+
+static int sii902x_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct i2c_adapter *adap = to_i2c_adapter(client->dev.parent);
+ int ret, err;
+ struct fb_info edid_fbi;
+
+ if (!g_enable_hdmi)
+ return -EPERM;
+
+ if (!i2c_check_functionality(adap, I2C_FUNC_SMBUS_BYTE)) {
+ dev_err(&client->dev, "i2c_check_functionality error\n");
+ return -ENODEV;
+ }
+
+ sii902x = devm_kzalloc(&client->dev, sizeof(*sii902x), GFP_KERNEL);
+ if (!sii902x)
+ return -ENOMEM;
+
+ sii902x->client = client;
+ i2c_set_clientdata(client, sii902x);
+
+ err = sii902x_initialize(sii902x);
+ if (err)
+ return err;
+
+ sii902x_chip_id(sii902x);
+ sii902x_power_up_tx(sii902x);
+ sii902x_enable_source(sii902x);
+
+ /* try to read edid */
+ if (sii902x_get_edid(&edid_fbi) < 0)
+ dev_warn(&client->dev, "Can not read edid\n");
+
+ if (client->irq) {
+ ret = devm_request_irq(&client->dev, client->irq,
+ sii902x_detect_handler, 0,
+ "SII902x_det", sii902x);
+ if (ret < 0)
+ dev_warn(&client->dev,
+ "cound not request det irq %d\n",
+ client->irq);
+ else {
+ INIT_DELAYED_WORK(&(sii902x->det_work), det_worker);
+ /*enable cable hot plug irq*/
+ sii902x_write(client, 0x3C, 0x01);
+ }
+ ret = device_create_file(&client->dev, &dev_attr_fb_name);
+ if (ret < 0)
+ dev_warn(&client->dev,
+ "cound not create sys node for fb name\n");
+ ret = device_create_file(&client->dev, &dev_attr_cable_state);
+ if (ret < 0)
+ dev_warn(&client->dev,
+ "cound not create sys node for cable state\n");
+ }
+
+ fb_register_client(&nb);
+
+ return 0;
+}
+
+static int sii902x_remove(struct i2c_client *client)
+{
+ fb_unregister_client(&nb);
+ sii902x_poweroff();
+ return 0;
+}
+
+static const struct i2c_device_id sii902x_id[] = {
+ { "sii902x", 0 },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, sii902x_id);
+
+static const struct of_device_id sii902x_dt_ids[] = {
+ { .compatible = "fsl,sii902x", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, sii902x_dt_ids);
+
+static struct i2c_driver sii902x_i2c_driver = {
+ .driver = {
+ .name = "sii902x",
+ .owner = THIS_MODULE,
+ .of_match_table = sii902x_dt_ids,
+ },
+ .probe = sii902x_probe,
+ .remove = sii902x_remove,
+ .id_table = sii902x_id,
+};
+module_i2c_driver(sii902x_i2c_driver);
+
+static int __init enable_hdmi_setup(char *str)
+{
+ g_enable_hdmi = true;
+
+ return 1;
+}
+__setup("hdmi", enable_hdmi_setup);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("SII902x DVI/HDMI driver");
+MODULE_LICENSE("GPL");
--
2.1.0.27.g96db324
--
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