+// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2004
* Pierre Aubert, Staubli Faverges , <p.aubert@staubli.com>
* Copyright 2011 Freescale Semiconductor, Inc.
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
/************************************************************************
****************************************************************************/
#include <common.h>
+#include <edid.h>
+#include <env.h>
+#include <errno.h>
#include <linux/ctype.h>
#include "videomodes.h"
* returns the length to the next seperator
*/
static int
-video_get_param_len (char *start, char sep)
+video_get_param_len(const char *start, char sep)
{
int i = 0;
while ((*start != 0) && (*start != sep)) {
/* first search for the environment containing the real param string */
s = penv;
- if ((p = getenv (s)) != NULL)
+ p = env_get(s);
+ if (p)
s = p;
/*
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");
+ char *p = env_get("video-mode");
if (!p)
return 0;
return 1;
}
+
+/*
+ * Parse the 'video-mode' environment variable using video_get_video_mode()
+ * and lookup the matching ctfb_res_modes in res_mode_init.
+ *
+ * @default_mode: RES_MODE_##x## define for the mode to store in mode_ret
+ * when 'video-mode' is not set or does not contain a valid mode
+ * @default_depth: depth to set when 'video-mode' is not set
+ * @mode_ret: pointer where the mode will be stored
+ * @depth_ret: pointer where the depth will be stored
+ * @options: pointer to any remaining options, or NULL
+ */
+void video_get_ctfb_res_modes(int default_mode, unsigned int default_depth,
+ const struct ctfb_res_modes **mode_ret,
+ unsigned int *depth_ret,
+ const char **options)
+{
+ unsigned int i, xres, yres, depth, refresh;
+
+ *mode_ret = &res_mode_init[default_mode];
+ *depth_ret = default_depth;
+ *options = NULL;
+
+ if (!video_get_video_mode(&xres, &yres, &depth, &refresh, options))
+ return;
+
+ for (i = 0; i < RES_MODES_COUNT; i++) {
+ if (res_mode_init[i].xres == xres &&
+ res_mode_init[i].yres == yres &&
+ res_mode_init[i].refresh == refresh) {
+ *mode_ret = &res_mode_init[i];
+ *depth_ret = depth;
+ return;
+ }
+ }
+
+ printf("video-mode %dx%d-%d@%d not available, falling back to %dx%d-%d@%d\n",
+ xres, yres, depth, refresh, (*mode_ret)->xres,
+ (*mode_ret)->yres, *depth_ret, (*mode_ret)->refresh);
+}
+
+/*
+ * Find the named string option within the ',' separated options string, and
+ * store its value in dest.
+ *
+ * @options: ',' separated options string
+ * @name: name of the option to look for
+ * @dest: destination buffer to store the value of the option in
+ * @dest_len: length of dest
+ * @def: value to store in dest if the option is not present in options
+ */
+void video_get_option_string(const char *options, const char *name,
+ char *dest, int dest_len, const char *def)
+{
+ const char *p = options;
+ const int name_len = strlen(name);
+ int i, len;
+
+ while (p && (i = video_get_param_len(p, ',')) != 0) {
+ if (strncmp(p, name, name_len) == 0 && p[name_len] == '=') {
+ len = i - (name_len + 1);
+ if (len >= dest_len)
+ len = dest_len - 1;
+ memcpy(dest, &p[name_len + 1], len);
+ dest[len] = 0;
+ return;
+ }
+ p += i;
+ if (*p != 0)
+ p++; /* skip ',' */
+ }
+ strcpy(dest, def);
+}
+
+/*
+ * Find the named integer option within the ',' separated options string, and
+ * return its value.
+ *
+ * @options: ',' separated options string
+ * @name: name of the option to look for
+ * @def: value to return if the option is not present in options
+ */
+int video_get_option_int(const char *options, const char *name, int def)
+{
+ const char *p = options;
+ const int name_len = strlen(name);
+ int i;
+
+ while (p && (i = video_get_param_len(p, ',')) != 0) {
+ if (strncmp(p, name, name_len) == 0 && p[name_len] == '=')
+ return simple_strtoul(&p[name_len + 1], NULL, 10);
+
+ p += i;
+ if (*p != 0)
+ p++; /* skip ',' */
+ }
+ return def;
+}
+
+/**
+ * Convert an EDID detailed timing to a struct ctfb_res_modes
+ *
+ * @param t The EDID detailed timing to be converted
+ * @param mode Returns the converted timing
+ *
+ * @return 0 on success, or a negative errno on error
+ */
+int video_edid_dtd_to_ctfb_res_modes(struct edid_detailed_timing *t,
+ struct ctfb_res_modes *mode)
+{
+ int margin, h_total, v_total;
+
+ /* Check all timings are non 0 */
+ if (EDID_DETAILED_TIMING_PIXEL_CLOCK(*t) == 0 ||
+ EDID_DETAILED_TIMING_HORIZONTAL_ACTIVE(*t) == 0 ||
+ EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(*t) == 0 ||
+ EDID_DETAILED_TIMING_VERTICAL_ACTIVE(*t) == 0 ||
+ EDID_DETAILED_TIMING_VERTICAL_BLANKING(*t) == 0 ||
+ EDID_DETAILED_TIMING_HSYNC_OFFSET(*t) == 0 ||
+ EDID_DETAILED_TIMING_VSYNC_OFFSET(*t) == 0 ||
+ /* 3d formats are not supported */
+ EDID_DETAILED_TIMING_FLAG_STEREO(*t) != 0)
+ return -EINVAL;
+
+ mode->xres = EDID_DETAILED_TIMING_HORIZONTAL_ACTIVE(*t);
+ mode->yres = EDID_DETAILED_TIMING_VERTICAL_ACTIVE(*t);
+
+ h_total = mode->xres + EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(*t);
+ v_total = mode->yres + EDID_DETAILED_TIMING_VERTICAL_BLANKING(*t);
+ mode->refresh = EDID_DETAILED_TIMING_PIXEL_CLOCK(*t) /
+ (h_total * v_total);
+
+ mode->pixclock_khz = EDID_DETAILED_TIMING_PIXEL_CLOCK(*t) / 1000;
+ mode->pixclock = 1000000000L / mode->pixclock_khz;
+
+ mode->right_margin = EDID_DETAILED_TIMING_HSYNC_OFFSET(*t);
+ mode->hsync_len = EDID_DETAILED_TIMING_HSYNC_PULSE_WIDTH(*t);
+ margin = EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(*t) -
+ (mode->right_margin + mode->hsync_len);
+ if (margin <= 0)
+ return -EINVAL;
+
+ mode->left_margin = margin;
+
+ mode->lower_margin = EDID_DETAILED_TIMING_VSYNC_OFFSET(*t);
+ mode->vsync_len = EDID_DETAILED_TIMING_VSYNC_PULSE_WIDTH(*t);
+ margin = EDID_DETAILED_TIMING_VERTICAL_BLANKING(*t) -
+ (mode->lower_margin + mode->vsync_len);
+ if (margin <= 0)
+ return -EINVAL;
+
+ mode->upper_margin = margin;
+
+ mode->sync = 0;
+ if (EDID_DETAILED_TIMING_FLAG_HSYNC_POLARITY(*t))
+ mode->sync |= FB_SYNC_HOR_HIGH_ACT;
+ if (EDID_DETAILED_TIMING_FLAG_VSYNC_POLARITY(*t))
+ mode->sync |= FB_SYNC_VERT_HIGH_ACT;
+
+ if (EDID_DETAILED_TIMING_FLAG_INTERLACED(*t))
+ mode->vmode = FB_VMODE_INTERLACED;
+ else
+ mode->vmode = FB_VMODE_NONINTERLACED;
+
+ return 0;
+}
projects / oweals / u-boot.git / blobdiff