X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=drivers%2Fvideo%2Fvideomodes.c;h=ef9bc4c08284c1d3e3d2d23e4a585ccbbac677b2;hb=8c318eb3a0db27ea7f0ae3e7be42f5b4b375cf3b;hp=d27ce1d2cd2a45c400df753233be499583c92774;hpb=f82642e33899766892499b163e60560fbbf87773;p=karo-tx-uboot.git

diff --git a/drivers/video/videomodes.c b/drivers/video/videomodes.c
index d27ce1d2cd..ef9bc4c082 100644
--- a/drivers/video/videomodes.c
+++ b/drivers/video/videomodes.c
@@ -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] = {
@@ -156,15 +159,18 @@ video_search_param (char *start, char *param)
 int video_get_params (struct ctfb_res_modes *pPar, char *penv)
 {
 	char *p, *s, *val_s;
-	int i = 0, t;
+	int i = 0;
 	int bpp;
 	int mode;
+
 	/* first search for the environment containing the real param string */
 	s = penv;
-	if ((p = getenv (s)) != NULL) {
+
+	if ((p = getenv (s)) != NULL)
 		s = p;
-	}
-	/* in case of the bootargs line, we have to start
+
+	/*
+	 * in case of the bootargs line, we have to start
 	 * after "video=ctfb:"
 	 */
 	i = video_search_param (s, "video=ctfb:");
@@ -174,19 +180,22 @@ int video_get_params (struct ctfb_res_modes *pPar, char *penv)
 	}
 	/* search for mode as a default value */
 	p = s;
-	t = 0;
 	mode = 0;		/* default */
+
 	while ((i = video_get_param_len (p, ',')) != 0) {
 		GET_OPTION ("mode:", mode)
 			p += i;
 		if (*p != 0)
 			p++;	/* skip ',' */
 	}
+
 	if (mode >= RES_MODES_COUNT)
 		mode = 0;
+
 	*pPar = res_mode_init[mode];	/* copy default values */
 	bpp = 24 - ((mode % 3) * 8);
 	p = s;			/* restart */
+
 	while ((i = video_get_param_len (p, ',')) != 0) {
 		GET_OPTION ("x:", pPar->xres)
 			GET_OPTION ("y:", pPar->yres)
@@ -206,3 +215,64 @@ 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;
+}