@@ -28,3 +28,22 @@ The driver has been tested with the following configurations:
- MPC823FADS with AD7176 on a PAL TV (YCbYCr) - arsenio@tin.it
- GENIETV with AD7177 on a PAL TV (YCbYCr) - arsenio@tin.it
+
+
+"video-mode" environment variable
+===============================
+
+The 'video-mode' environment variable can be used to enable and configure
+some video drivers. The format matches the video= command-line option used
+for Linux:
+
+ video-mode=<driver>:<xres>x<yres>-<depth>@<freq><,option=string>
+
+ <driver> The video driver name, ignored by U-Boot
+ <xres> The X resolution (in pixels) to use.
+ <yres> The Y resolution (in pixels) to use.
+ <depth> The color depth (in bits) to use.
+ <freq> The frequency (in Hz) to use.
+ <options> A comma-separated list of device-specific options
+
+Example: video-mode=fslfb:1280x1024-32@60,monitor=dvi
@@ -1,6 +1,7 @@
/*
* (C) Copyright 2004
* Pierre Aubert, Staubli Faverges , <p.aubert@staubli.com>
+ * Copyright 2011 Freescale Semiconductor, Inc.
*
* See file CREDITS for list of people who contributed to this
* project.
@@ -73,6 +74,8 @@
****************************************************************************/
#include <common.h>
+#include <linux/ctype.h>
+
#include "videomodes.h"
const struct ctfb_vesa_modes vesa_modes[VESA_MODES_COUNT] = {
@@ -206,3 +209,64 @@ int video_get_params (struct ctfb_res_modes *pPar, char *penv)
}
return bpp;
}
+
+/*
+ * Parse the 'video-mode' environment variable
+ *
+ * Example: "video-mode=fslfb:1280x1024-32@60,monitor=dvi". See
+ * doc/README.video for more information on how to set the variable.
+ *
+ * @xres: returned value of X-resolution
+ * @yres: returned value of Y-resolution
+ * @depth: returned value of color depth
+ * @freq: returned value of monitor frequency
+ * @options: pointer to any remaining options, or NULL
+ *
+ * Returns 1 if valid values were found, 0 otherwise
+ */
+int video_get_video_mode(unsigned int *xres, unsigned int *yres,
+ unsigned int *depth, unsigned int *freq, const char **options)
+{
+ char *p = getenv("video-mode");
+ if (!p)
+ return 0;
+
+ /* Skip over the driver name, which we don't care about. */
+ p = strchr(p, ':');
+ if (!p)
+ return 0;
+
+ /* Get the X-resolution*/
+ while (*p && !isdigit(*p))
+ p++;
+ *xres = simple_strtoul(p, &p, 10);
+ if (!*xres)
+ return 0;
+
+ /* Get the Y-resolution */
+ while (*p && !isdigit(*p))
+ p++;
+ *yres = simple_strtoul(p, &p, 10);
+ if (!*yres)
+ return 0;
+
+ /* Get the depth */
+ while (*p && !isdigit(*p))
+ p++;
+ *depth = simple_strtoul(p, &p, 10);
+ if (!*depth)
+ return 0;
+
+ /* Get the frequency */
+ while (*p && !isdigit(*p))
+ p++;
+ *freq = simple_strtoul(p, &p, 10);
+ if (!*freq)
+ return 0;
+
+ /* Find the extra options, if any */
+ p = strchr(p, ',');
+ *options = p ? p + 1 : NULL;
+
+ return 1;
+}
@@ -86,3 +86,6 @@ extern const struct ctfb_vesa_modes vesa_modes[];
extern const struct ctfb_res_modes res_mode_init[];
int video_get_params (struct ctfb_res_modes *pPar, char *penv);
+
+int video_get_video_mode(unsigned int *xres, unsigned int *yres,
+ unsigned int *depth, unsigned int *freq, const char **options);
Add function video_get_video_mode(), which parses the "video-mode" environment variable and returns each of its components. The format matches the video= command-line option used for Linux: video-mode=<driver>:<xres>x<yres>-<depth>@<freq><,option=string> <driver> The video driver, ignored by U-Boot <xres> The X resolution (in pixels) to use. <yres> The Y resolution (in pixels) to use. <depth> The color depth (in bits) to use. <freq> The frequency (in Hz) to use. <options> A comma-separated list of device-specific options Signed-off-by: Timur Tabi <timur@freescale.com> --- doc/README.video | 19 +++++++++++++ drivers/video/videomodes.c | 64 ++++++++++++++++++++++++++++++++++++++++++++ drivers/video/videomodes.h | 3 ++ 3 files changed, 86 insertions(+), 0 deletions(-)