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authorGeert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>2008-02-06 01:39:35 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-06 10:41:17 -0800
commita3665366b0cbf3af1e0949bb9ada9ce63eaaaac1 (patch)
tree3617fcebf52db6a796acb179027dea8b96bb8834 /drivers/video/ps3fb.c
parent34c422fb2435b1e18b7c36c3310e4f57e21d7ddf (diff)
downloadvexpress-lsk-a3665366b0cbf3af1e0949bb9ada9ce63eaaaac1.tar.gz
ps3fb: round up video modes
Round up arbitrary video modes until they fit (if possible) Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/ps3fb.c')
-rw-r--r--drivers/video/ps3fb.c158
1 files changed, 113 insertions, 45 deletions
diff --git a/drivers/video/ps3fb.c b/drivers/video/ps3fb.c
index d61e321dc90..d552610603b 100644
--- 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_vmode(int id)
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_margin--;
- }
- if (!var->yres) {
+ if (!var->yres)
var->yres = 1;
- var->lower_margin--;
+
+ /* minimum virtual resolution */
+ if (var->xres_virtual < var->xres)
+ var->xres_virtual = var->xres;
+ if (var->yres_virtual < var->yres)
+ var->yres_virtual = var->yres;
+
+ /* minimum margins */
+ if (var->left_margin < vmode->left_margin)
+ var->left_margin = vmode->left_margin;
+ if (var->right_margin < vmode->right_margin)
+ var->right_margin = vmode->right_margin;
+ if (var->upper_margin < vmode->upper_margin)
+ var->upper_margin = vmode->upper_margin;
+ if (var->lower_margin < vmode->lower_margin)
+ var->lower_margin = vmode->lower_margin;
+
+ /* extra margins */
+ gap = ((long)vmode->left_margin + (long)vmode->xres +
+ (long)vmode->right_margin) -
+ ((long)var->left_margin + (long)var->xres +
+ (long)var->right_margin);
+ if (gap > 0) {
+ var->left_margin += gap/2;
+ var->right_margin += (gap+1)/2;
+ pr_debug("%s: rounded up H to %u [%u] %u\n", __func__,
+ var->left_margin, var->xres, var->right_margin);
}
+ gap = ((long)vmode->upper_margin + (long)vmode->yres +
+ (long)vmode->lower_margin) -
+ ((long)var->upper_margin + (long)var->yres +
+ (long)var->lower_margin);
+ if (gap > 0) {
+ var->upper_margin += gap/2;
+ var->lower_margin += (gap+1)/2;
+ pr_debug("%s: rounded up V to %u [%u] %u\n", __func__,
+ var->upper_margin, var->yres, var->lower_margin);
+ }
+
+ /* fixed fields */
+ var->pixclock = vmode->pixclock;
+ var->hsync_len = vmode->hsync_len;
+ var->vsync_len = vmode->vsync_len;
+ var->sync = vmode->sync;
+
if (ps3_compare_firmware_version(1, 9, 0) >= 0) {
- *xdr_line_length = GPU_ALIGN_UP(max(var->xres,
- var->xres_virtual) * BPP);
+ *xdr_line_length = GPU_ALIGN_UP(var->xres_virtual * BPP);
if (*xdr_line_length > GPU_MAX_LINE_LENGTH)
*xdr_line_length = GPU_MAX_LINE_LENGTH;
} else
@@ -465,22 +548,11 @@ static int ps3fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
u32 xdr_line_length, ddr_line_length;
int mode;
- dev_dbg(info->device, "var->xres:%u info->var.xres:%u\n", var->xres,
- info->var.xres);
- dev_dbg(info->device, "var->yres:%u info->var.yres:%u\n", var->yres,
- info->var.yres);
-
- /* FIXME For now we do exact matches only */
mode = ps3fb_find_mode(var, &ddr_line_length, &xdr_line_length);
if (!mode)
return -EINVAL;
/* Virtual screen */
- if (var->xres_virtual < var->xres)
- var->xres_virtual = var->xres;
- if (var->yres_virtual < var->yres)
- var->yres_virtual = var->yres;
-
if (var->xres_virtual > xdr_line_length / BPP) {
dev_dbg(info->device,
"Horizontal virtual screen size too large\n");
@@ -549,10 +621,6 @@ static int ps3fb_set_par(struct fb_info *info)
const struct fb_videomode *vmode;
u64 dst;
- dev_dbg(info->device, "xres:%d xv:%d yres:%d yv:%d clock:%d\n",
- info->var.xres, info->var.xres_virtual,
- info->var.yres, info->var.yres_virtual, info->var.pixclock);
-
mode = ps3fb_find_mode(&info->var, &ddr_line_length, &xdr_line_length);
if (!mode)
return -EINVAL;