From: Geert Uytterhoeven <[EMAIL PROTECTED]>
ps3fb: Round up arbitrary video modes until they fit (if possible)
Signed-off-by: Geert Uytterhoeven <[EMAIL PROTECTED]>
---
drivers/video/ps3fb.c | 160 +++---
1 file changed, 114 insertions(+), 46 deletions(-)
--- a/drivers/video/ps3fb.c
+++ b/drivers/video/ps3fb.c
@@ -276,29 +276,49 @@ static char *mode_option __devinitdata;
static int ps3fb_cmp_mode(const struct fb_videomode *vmode,
const struct fb_var_screeninfo *var)
{
- /* resolution + black border must match a native resolution */
- if (vmode->left_margin + vmode->xres + vmode->right_margin !=
- var->left_margin + var->xres + var->right_margin ||
- vmode->upper_margin + vmode->yres + vmode->lower_margin !=
- var->upper_margin + var->yres + var->lower_margin)
+ long xres, yres, left_margin, right_margin, upper_margin, lower_margin;
+ long dx, dy;
+
+ /* maximum values */
+ if (var->xres > vmode->xres || var->yres > vmode->yres ||
+ var->pixclock > vmode->pixclock ||
+ var->hsync_len > vmode->hsync_len ||
+ var->vsync_len > vmode->vsync_len)
return -1;
- /* minimum limits for margins */
- if (vmode->left_margin > var->left_margin ||
- vmode->right_margin > var->right_margin ||
- vmode->upper_margin > var->upper_margin ||
- vmode->lower_margin > var->lower_margin)
+ /* progressive/interlaced must match */
+ if ((var->vmode & FB_VMODE_MASK) != vmode->vmode)
return -1;
- /* these fields must match exactly */
- if (vmode->pixclock != var->pixclock ||
- vmode->hsync_len != var->hsync_len ||
- vmode->vsync_len != var->vsync_len ||
- vmode->sync != var->sync ||
- vmode->vmode != (var->vmode & FB_VMODE_MASK))
+ /* minimum resolution */
+ xres = max(var->xres, 1U);
+ yres = max(var->yres, 1U);
+
+ /* minimum margins */
+ left_margin = max(var->left_margin, vmode->left_margin);
+ right_margin = max(var->right_margin, vmode->right_margin);
+ upper_margin = max(var->upper_margin, vmode->upper_margin);
+ lower_margin = max(var->lower_margin, vmode->lower_margin);
+
+ /* resolution + margins may not exceed native parameters */
+ dx = ((long)vmode->left_margin + (long)vmode->xres +
+ (long)vmode->right_margin) -
+(left_margin + xres + right_margin);
+ if (dx < 0)
return -1;
- return 0;
+ dy = ((long)vmode->upper_margin + (long)vmode->yres +
+ (long)vmode->lower_margin) -
+(upper_margin + yres + lower_margin);
+ if (dy < 0)
+ return -1;
+
+ /* exact match */
+ if (!dx && !dy)
+ return 0;
+
+ /* resolution difference */
+ return (vmode->xres - xres) * (vmode->yres - yres);
}
static const struct fb_videomode *ps3fb_native_vmode(enum ps3av_mode_num id)
@@ -324,33 +344,96 @@ static const struct fb_videomode *ps3fb_
static unsigned int ps3fb_find_mode(struct fb_var_screeninfo *var,
u32 *ddr_line_length, u32 *xdr_line_length)
{
- unsigned int id;
+ unsigned int id, best_id;
+ int diff, best_diff;
const struct fb_videomode *vmode;
+ long gap;
+ best_id = 0;
+ best_diff = INT_MAX;
+ pr_debug("%s: wanted %u [%u] %u x %u [%u] %u\n", __func__,
+var->left_margin, var->xres, var->right_margin,
+var->upper_margin, var->yres, var->lower_margin);
for (id = PS3AV_MODE_480I; id <= PS3AV_MODE_WUXGA; id++) {
vmode = ps3fb_native_vmode(id);
- if (!ps3fb_cmp_mode(vmode, var))
- goto found;
+ diff = ps3fb_cmp_mode(vmode, var);
+ pr_debug("%s: mode %u: %u [%u] %u x %u [%u] %u: diff = %d\n",
+__func__, id, vmode->left_margin, vmode->xres,
+vmode->right_margin, vmode->upper_margin,
+vmode->yres, vmode->lower_margin, diff);
+ if (diff < 0)
+ continue;
+ if (diff < best_diff) {
+ best_id = id;
+ if (!diff)
+ break;
+ best_diff = diff;
+ }
}
- pr_debug("%s: mode not found\n", __func__);
- return 0;
+ if (!best_id) {
+ pr_debug("%s: no suitable mode found\n", __func__);
+ return 0;
+ }
+
+ id = best_id;
+ vmode = ps3fb_native_vmode(id);
-found:
*ddr_line_length = vmode->xres * BPP;
- if (!var->xres) {
+ /* minimum resolution */
+ if (!var->xres)
var->xres = 1;
- var->right_ma
