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path: root/drivers/video/modedb.c
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Diffstat (limited to 'drivers/video/modedb.c')
-rw-r--r--drivers/video/modedb.c444
1 files changed, 225 insertions, 219 deletions
diff --git a/drivers/video/modedb.c b/drivers/video/modedb.c
index cb175fe7abc..a9a907c440d 100644
--- a/drivers/video/modedb.c
+++ b/drivers/video/modedb.c
@@ -491,55 +491,56 @@ EXPORT_SYMBOL(vesa_modes);
static int fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info,
const struct fb_videomode *mode, unsigned int bpp)
{
- int err = 0;
-
- DPRINTK("Trying mode %s %dx%d-%d@%d\n", mode->name ? mode->name : "noname",
- mode->xres, mode->yres, bpp, mode->refresh);
- var->xres = mode->xres;
- var->yres = mode->yres;
- var->xres_virtual = mode->xres;
- var->yres_virtual = mode->yres;
- var->xoffset = 0;
- var->yoffset = 0;
- var->bits_per_pixel = bpp;
- var->activate |= FB_ACTIVATE_TEST;
- var->pixclock = mode->pixclock;
- var->left_margin = mode->left_margin;
- var->right_margin = mode->right_margin;
- var->upper_margin = mode->upper_margin;
- var->lower_margin = mode->lower_margin;
- var->hsync_len = mode->hsync_len;
- var->vsync_len = mode->vsync_len;
- var->sync = mode->sync;
- var->vmode = mode->vmode;
- if (info->fbops->fb_check_var)
- err = info->fbops->fb_check_var(var, info);
- var->activate &= ~FB_ACTIVATE_TEST;
- return err;
+ int err = 0;
+
+ DPRINTK("Trying mode %s %dx%d-%d@%d\n",
+ mode->name ? mode->name : "noname",
+ mode->xres, mode->yres, bpp, mode->refresh);
+ var->xres = mode->xres;
+ var->yres = mode->yres;
+ var->xres_virtual = mode->xres;
+ var->yres_virtual = mode->yres;
+ var->xoffset = 0;
+ var->yoffset = 0;
+ var->bits_per_pixel = bpp;
+ var->activate |= FB_ACTIVATE_TEST;
+ var->pixclock = mode->pixclock;
+ var->left_margin = mode->left_margin;
+ var->right_margin = mode->right_margin;
+ var->upper_margin = mode->upper_margin;
+ var->lower_margin = mode->lower_margin;
+ var->hsync_len = mode->hsync_len;
+ var->vsync_len = mode->vsync_len;
+ var->sync = mode->sync;
+ var->vmode = mode->vmode;
+ if (info->fbops->fb_check_var)
+ err = info->fbops->fb_check_var(var, info);
+ var->activate &= ~FB_ACTIVATE_TEST;
+ return err;
}
/**
- * fb_find_mode - finds a valid video mode
- * @var: frame buffer user defined part of display
- * @info: frame buffer info structure
- * @mode_option: string video mode to find
- * @db: video mode database
- * @dbsize: size of @db
- * @default_mode: default video mode to fall back to
- * @default_bpp: default color depth in bits per pixel
+ * fb_find_mode - finds a valid video mode
+ * @var: frame buffer user defined part of display
+ * @info: frame buffer info structure
+ * @mode_option: string video mode to find
+ * @db: video mode database
+ * @dbsize: size of @db
+ * @default_mode: default video mode to fall back to
+ * @default_bpp: default color depth in bits per pixel
*
- * Finds a suitable video mode, starting with the specified mode
- * in @mode_option with fallback to @default_mode. If
- * @default_mode fails, all modes in the video mode database will
- * be tried.
+ * Finds a suitable video mode, starting with the specified mode
+ * in @mode_option with fallback to @default_mode. If
+ * @default_mode fails, all modes in the video mode database will
+ * be tried.
*
- * Valid mode specifiers for @mode_option:
+ * Valid mode specifiers for @mode_option:
*
- * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m] or
- * <name>[-<bpp>][@<refresh>]
+ * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m] or
+ * <name>[-<bpp>][@<refresh>]
*
- * with <xres>, <yres>, <bpp> and <refresh> decimal numbers and
- * <name> a string.
+ * with <xres>, <yres>, <bpp> and <refresh> decimal numbers and
+ * <name> a string.
*
* If 'M' is present after yres (and before refresh/bpp if present),
* the function will compute the timings using VESA(tm) Coordinated
@@ -551,12 +552,12 @@ static int fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info,
*
* 1024x768MR-8@60m - Reduced blank with margins at 60Hz.
*
- * NOTE: The passed struct @var is _not_ cleared! This allows you
- * to supply values for e.g. the grayscale and accel_flags fields.
+ * NOTE: The passed struct @var is _not_ cleared! This allows you
+ * to supply values for e.g. the grayscale and accel_flags fields.
*
- * Returns zero for failure, 1 if using specified @mode_option,
- * 2 if using specified @mode_option with an ignored refresh rate,
- * 3 if default mode is used, 4 if fall back to any valid mode.
+ * Returns zero for failure, 1 if using specified @mode_option,
+ * 2 if using specified @mode_option with an ignored refresh rate,
+ * 3 if default mode is used, 4 if fall back to any valid mode.
*
*/
@@ -566,198 +567,203 @@ int fb_find_mode(struct fb_var_screeninfo *var,
const struct fb_videomode *default_mode,
unsigned int default_bpp)
{
- int i;
-
- /* Set up defaults */
- if (!db) {
- db = modedb;
- dbsize = ARRAY_SIZE(modedb);
- }
-
- if (!default_mode)
- default_mode = &db[0];
-
- if (!default_bpp)
- default_bpp = 8;
-
- /* Did the user specify a video mode? */
- if (!mode_option)
- mode_option = fb_mode_option;
- if (mode_option) {
- const char *name = mode_option;
- unsigned int namelen = strlen(name);
- int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
- unsigned int xres = 0, yres = 0, bpp = default_bpp, refresh = 0;
- int yres_specified = 0, cvt = 0, rb = 0, interlace = 0, margins = 0;
- u32 best, diff, tdiff;
-
- for (i = namelen-1; i >= 0; i--) {
- switch (name[i]) {
- case '@':
- namelen = i;
- if (!refresh_specified && !bpp_specified &&
- !yres_specified) {
- refresh = simple_strtol(&name[i+1], NULL, 10);
- refresh_specified = 1;
- if (cvt || rb)
- cvt = 0;
- } else
- goto done;
- break;
- case '-':
- namelen = i;
- if (!bpp_specified && !yres_specified) {
- bpp = simple_strtol(&name[i+1], NULL, 10);
- bpp_specified = 1;
- if (cvt || rb)
- cvt = 0;
- } else
- goto done;
- break;
- case 'x':
- if (!yres_specified) {
- yres = simple_strtol(&name[i+1], NULL, 10);
- yres_specified = 1;
- } else
- goto done;
- break;
- case '0' ... '9':
- break;
- case 'M':
- if (!yres_specified)
- cvt = 1;
- break;
- case 'R':
- if (!cvt)
- rb = 1;
- break;
- case 'm':
- if (!cvt)
- margins = 1;
- break;
- case 'i':
- if (!cvt)
- interlace = 1;
- break;
- default:
- goto done;
- }
- }
- if (i < 0 && yres_specified) {
- xres = simple_strtol(name, NULL, 10);
- res_specified = 1;
- }
-done:
- if (cvt) {
- struct fb_videomode cvt_mode;
- int ret;
-
- DPRINTK("CVT mode %dx%d@%dHz%s%s%s\n", xres, yres,
- (refresh) ? refresh : 60, (rb) ? " reduced blanking" :
- "", (margins) ? " with margins" : "", (interlace) ?
- " interlaced" : "");
-
- memset(&cvt_mode, 0, sizeof(cvt_mode));
- cvt_mode.xres = xres;
- cvt_mode.yres = yres;
- cvt_mode.refresh = (refresh) ? refresh : 60;
+ int i;
- if (interlace)
- cvt_mode.vmode |= FB_VMODE_INTERLACED;
- else
- cvt_mode.vmode &= ~FB_VMODE_INTERLACED;
+ /* Set up defaults */
+ if (!db) {
+ db = modedb;
+ dbsize = ARRAY_SIZE(modedb);
+ }
- ret = fb_find_mode_cvt(&cvt_mode, margins, rb);
+ if (!default_mode)
+ default_mode = &db[0];
+
+ if (!default_bpp)
+ default_bpp = 8;
+
+ /* Did the user specify a video mode? */
+ if (!mode_option)
+ mode_option = fb_mode_option;
+ if (mode_option) {
+ const char *name = mode_option;
+ unsigned int namelen = strlen(name);
+ int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
+ unsigned int xres = 0, yres = 0, bpp = default_bpp, refresh = 0;
+ int yres_specified = 0, cvt = 0, rb = 0, interlace = 0;
+ int margins = 0;
+ u32 best, diff, tdiff;
+
+ for (i = namelen-1; i >= 0; i--) {
+ switch (name[i]) {
+ case '@':
+ namelen = i;
+ if (!refresh_specified && !bpp_specified &&
+ !yres_specified) {
+ refresh = simple_strtol(&name[i+1], NULL,
+ 10);
+ refresh_specified = 1;
+ if (cvt || rb)
+ cvt = 0;
+ } else
+ goto done;
+ break;
+ case '-':
+ namelen = i;
+ if (!bpp_specified && !yres_specified) {
+ bpp = simple_strtol(&name[i+1], NULL,
+ 10);
+ bpp_specified = 1;
+ if (cvt || rb)
+ cvt = 0;
+ } else
+ goto done;
+ break;
+ case 'x':
+ if (!yres_specified) {
+ yres = simple_strtol(&name[i+1], NULL,
+ 10);
+ yres_specified = 1;
+ } else
+ goto done;
+ break;
+ case '0' ... '9':
+ break;
+ case 'M':
+ if (!yres_specified)
+ cvt = 1;
+ break;
+ case 'R':
+ if (!cvt)
+ rb = 1;
+ break;
+ case 'm':
+ if (!cvt)
+ margins = 1;
+ break;
+ case 'i':
+ if (!cvt)
+ interlace = 1;
+ break;
+ default:
+ goto done;
+ }
+ }
+ if (i < 0 && yres_specified) {
+ xres = simple_strtol(name, NULL, 10);
+ res_specified = 1;
+ }
+done:
+ if (cvt) {
+ struct fb_videomode cvt_mode;
+ int ret;
+
+ DPRINTK("CVT mode %dx%d@%dHz%s%s%s\n", xres, yres,
+ (refresh) ? refresh : 60,
+ (rb) ? " reduced blanking" : "",
+ (margins) ? " with margins" : "",
+ (interlace) ? " interlaced" : "");
+
+ memset(&cvt_mode, 0, sizeof(cvt_mode));
+ cvt_mode.xres = xres;
+ cvt_mode.yres = yres;
+ cvt_mode.refresh = (refresh) ? refresh : 60;
+
+ if (interlace)
+ cvt_mode.vmode |= FB_VMODE_INTERLACED;
+ else
+ cvt_mode.vmode &= ~FB_VMODE_INTERLACED;
+
+ ret = fb_find_mode_cvt(&cvt_mode, margins, rb);
+
+ if (!ret && !fb_try_mode(var, info, &cvt_mode, bpp)) {
+ DPRINTK("modedb CVT: CVT mode ok\n");
+ return 1;
+ }
- if (!ret && !fb_try_mode(var, info, &cvt_mode, bpp)) {
- DPRINTK("modedb CVT: CVT mode ok\n");
- return 1;
- }
+ DPRINTK("CVT mode invalid, getting mode from database\n");
+ }
- DPRINTK("CVT mode invalid, getting mode from database\n");
- }
+ DPRINTK("Trying specified video mode%s %ix%i\n",
+ refresh_specified ? "" : " (ignoring refresh rate)",
+ xres, yres);
- DPRINTK("Trying specified video mode%s %ix%i\n",
- refresh_specified ? "" : " (ignoring refresh rate)", xres, yres);
-
- if (!refresh_specified) {
- /*
- * If the caller has provided a custom mode database and a
- * valid monspecs structure, we look for the mode with the
- * highest refresh rate. Otherwise we play it safe it and
- * try to find a mode with a refresh rate closest to the
- * standard 60 Hz.
- */
- if (db != modedb &&
- info->monspecs.vfmin && info->monspecs.vfmax &&
- info->monspecs.hfmin && info->monspecs.hfmax &&
- info->monspecs.dclkmax) {
- refresh = 1000;
- } else {
- refresh = 60;
+ if (!refresh_specified) {
+ /*
+ * If the caller has provided a custom mode database and
+ * a valid monspecs structure, we look for the mode with
+ * the highest refresh rate. Otherwise we play it safe
+ * it and try to find a mode with a refresh rate closest
+ * to the standard 60 Hz.
+ */
+ if (db != modedb &&
+ info->monspecs.vfmin && info->monspecs.vfmax &&
+ info->monspecs.hfmin && info->monspecs.hfmax &&
+ info->monspecs.dclkmax) {
+ refresh = 1000;
+ } else {
+ refresh = 60;
+ }
}
- }
- diff = -1;
- best = -1;
- for (i = 0; i < dbsize; i++) {
- if ((name_matches(db[i], name, namelen) ||
- (res_specified && res_matches(db[i], xres, yres))) &&
- !fb_try_mode(var, info, &db[i], bpp)) {
- if (refresh_specified && db[i].refresh == refresh) {
- return 1;
- } else {
+ diff = -1;
+ best = -1;
+ for (i = 0; i < dbsize; i++) {
+ if ((name_matches(db[i], name, namelen) ||
+ (res_specified && res_matches(db[i], xres, yres))) &&
+ !fb_try_mode(var, info, &db[i], bpp)) {
+ if (refresh_specified && db[i].refresh == refresh)
+ return 1;
+
if (abs(db[i].refresh - refresh) < diff) {
diff = abs(db[i].refresh - refresh);
best = i;
}
}
}
- }
- if (best != -1) {
- fb_try_mode(var, info, &db[best], bpp);
- return (refresh_specified) ? 2 : 1;
- }
-
- diff = 2 * (xres + yres);
- best = -1;
- DPRINTK("Trying best-fit modes\n");
- for (i = 0; i < dbsize; i++) {
- DPRINTK("Trying %ix%i\n", db[i].xres, db[i].yres);
- if (!fb_try_mode(var, info, &db[i], bpp)) {
- tdiff = abs(db[i].xres - xres) +
- abs(db[i].yres - yres);
-
- /*
- * Penalize modes with resolutions smaller
- * than requested.
- */
- if (xres > db[i].xres || yres > db[i].yres)
- tdiff += xres + yres;
+ if (best != -1) {
+ fb_try_mode(var, info, &db[best], bpp);
+ return (refresh_specified) ? 2 : 1;
+ }
- if (diff > tdiff) {
- diff = tdiff;
- best = i;
+ diff = 2 * (xres + yres);
+ best = -1;
+ DPRINTK("Trying best-fit modes\n");
+ for (i = 0; i < dbsize; i++) {
+ DPRINTK("Trying %ix%i\n", db[i].xres, db[i].yres);
+ if (!fb_try_mode(var, info, &db[i], bpp)) {
+ tdiff = abs(db[i].xres - xres) +
+ abs(db[i].yres - yres);
+
+ /*
+ * Penalize modes with resolutions smaller
+ * than requested.
+ */
+ if (xres > db[i].xres || yres > db[i].yres)
+ tdiff += xres + yres;
+
+ if (diff > tdiff) {
+ diff = tdiff;
+ best = i;
+ }
}
}
+ if (best != -1) {
+ fb_try_mode(var, info, &db[best], bpp);
+ return 5;
+ }
}
- if (best != -1) {
- fb_try_mode(var, info, &db[best], bpp);
- return 5;
- }
- }
- DPRINTK("Trying default video mode\n");
- if (!fb_try_mode(var, info, default_mode, default_bpp))
- return 3;
+ DPRINTK("Trying default video mode\n");
+ if (!fb_try_mode(var, info, default_mode, default_bpp))
+ return 3;
- DPRINTK("Trying all modes\n");
- for (i = 0; i < dbsize; i++)
- if (!fb_try_mode(var, info, &db[i], default_bpp))
- return 4;
+ DPRINTK("Trying all modes\n");
+ for (i = 0; i < dbsize; i++)
+ if (!fb_try_mode(var, info, &db[i], default_bpp))
+ return 4;
- DPRINTK("No valid mode found\n");
- return 0;
+ DPRINTK("No valid mode found\n");
+ return 0;
}
/**
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-23 16:40:20 +0000