ENGR00239569 Mx6x HDMI Add RGB/YCbCr output select via system file

Add RGB/YCbCr output select via system file,
the default output is RGB.

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

diff --git a/drivers/video/mxc_hdmi.c b/drivers/video/mxc_hdmi.c
index 09b8823d3c15d0bbd041f82ad84195c7f584b278..ddfa0276a905d62ad6bdd1d1239d1da1247ba254 100644 (file)
--- a/drivers/video/mxc_hdmi.c
+++ b/drivers/video/mxc_hdmi.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2011-2012 Freescale Semiconductor, Inc.
+ * Copyright (C) 2011-2013 Freescale Semiconductor, Inc.
  *
  * 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
@@ -148,6 +148,7 @@ struct hdmi_data_info {
        unsigned int colorimetry;
        unsigned int pix_repet_factor;
        unsigned int hdcp_enable;
+       unsigned int rgb_out_enable;
        struct hdmi_vmode video_mode;
 };
 
@@ -248,6 +249,43 @@ static ssize_t mxc_hdmi_show_edid(struct device *dev,
 
 static DEVICE_ATTR(edid, S_IRUGO, mxc_hdmi_show_edid, NULL);
 
+static ssize_t mxc_hdmi_show_rgb_out_enable(struct device *dev,
+               struct device_attribute *attr, char *buf)
+{
+       struct mxc_hdmi *hdmi = dev_get_drvdata(dev);
+
+       if (hdmi->hdmi_data.rgb_out_enable == true)
+               strcpy(buf, "RGB out\n");
+       else
+               strcpy(buf, "YCbCr out\n");
+
+       return strlen(buf);
+}
+
+static ssize_t mxc_hdmi_store_rgb_out_enable(struct device *dev,
+               struct device_attribute *attr, const char *buf, size_t count)
+{
+       struct mxc_hdmi *hdmi = dev_get_drvdata(dev);
+       unsigned long value;
+       int ret;
+
+       ret = strict_strtoul(buf, 10, &value);
+       if (ret)
+               return ret;
+
+       hdmi->hdmi_data.rgb_out_enable = value;
+
+       /* Reconfig HDMI for output color space change */
+       mxc_hdmi_setup(hdmi, 0);
+
+       return count;
+}
+
+static DEVICE_ATTR(rgb_out_enable, S_IRUGO | S_IWUSR,
+                               mxc_hdmi_show_rgb_out_enable,
+                               mxc_hdmi_store_rgb_out_enable);
+
+
 /*!
  * this submodule is responsible for the video data synchronization.
  * for example, for RGB 4:4:4 input, the data map is defined as
@@ -1934,6 +1972,15 @@ static void mxc_hdmi_setup(struct mxc_hdmi *hdmi, unsigned long event)
 
        hdmi->hdmi_data.enc_out_format = RGB;
 
+       /* YCbCr only enabled in HDMI mode */
+       if (!hdmi->hdmi_data.video_mode.mDVI &&
+               !hdmi->hdmi_data.rgb_out_enable) {
+               if (hdmi->edid_cfg.cea_ycbcr444)
+                       hdmi->hdmi_data.enc_out_format = YCBCR444;
+               else if (hdmi->edid_cfg.cea_ycbcr422)
+                       hdmi->hdmi_data.enc_out_format = YCBCR422_8BITS;
+       }
+
        /* IPU not support depth color output */
        hdmi->hdmi_data.enc_color_depth = 8;
        hdmi->hdmi_data.pix_repet_factor = 0;
@@ -2243,6 +2290,9 @@ static int mxc_hdmi_disp_init(struct mxc_dispdrv_handle *disp,
 
        memset(&hdmi->hdmi_data, 0, sizeof(struct hdmi_data_info));
 
+       /* Default HDMI working in RGB mode */
+       hdmi->hdmi_data.rgb_out_enable = true;
+
        ret = request_irq(irq, mxc_hdmi_hotplug, IRQF_SHARED,
                          dev_name(&hdmi->pdev->dev), hdmi);
        if (ret < 0) {
@@ -2263,6 +2313,10 @@ static int mxc_hdmi_disp_init(struct mxc_dispdrv_handle *disp,
        if (ret < 0)
                dev_warn(&hdmi->pdev->dev,
                        "cound not create sys node for edid\n");
+       ret = device_create_file(&hdmi->pdev->dev, &dev_attr_rgb_out_enable);
+       if (ret < 0)
+               dev_warn(&hdmi->pdev->dev,
+                       "cound not create sys node for rgb out enable\n");
 
        dev_dbg(&hdmi->pdev->dev, "%s exit\n", __func__);