From d4b766a0bdab8d07b720c8d0a84292949a7d58bd Mon Sep 17 00:00:00 2001 From: Ondrej Zajicek Date: Tue, 16 Oct 2007 01:29:52 -0700 Subject: svgalib: mode selection updates This patch changes mode selection matching algorithm. It allows to choose mode with matching depth even when requested color lengths are greater than color lengths of every mode with requested color depth. It also fixes bug in s3fb - wrong error value returned when format is not supported by chip. Signed-off-by: Ondrej Zajicek Signed-off-by: Antonino Daplas Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/video/svgalib.c | 47 +++++++++++++++++++++++++++++++---------------- 1 file changed, 31 insertions(+), 16 deletions(-) (limited to 'drivers/video/svgalib.c') diff --git a/drivers/video/svgalib.c b/drivers/video/svgalib.c index 25df928d37d8..9c7106701572 100644 --- a/drivers/video/svgalib.c +++ b/drivers/video/svgalib.c @@ -598,9 +598,11 @@ void svga_set_timings(const struct svga_timing_regs *tm, struct fb_var_screeninf /* ------------------------------------------------------------------------- */ -int svga_match_format(const struct svga_fb_format *frm, struct fb_var_screeninfo *var, struct fb_fix_screeninfo *fix) +static inline int match_format(const struct svga_fb_format *frm, + struct fb_var_screeninfo *var) { int i = 0; + int stored = -EINVAL; while (frm->bits_per_pixel != SVGA_FORMAT_END_VAL) { @@ -609,25 +611,38 @@ int svga_match_format(const struct svga_fb_format *frm, struct fb_var_screeninfo (var->green.length <= frm->green.length) && (var->blue.length <= frm->blue.length) && (var->transp.length <= frm->transp.length) && - (var->nonstd == frm->nonstd)) { - var->bits_per_pixel = frm->bits_per_pixel; - var->red = frm->red; - var->green = frm->green; - var->blue = frm->blue; - var->transp = frm->transp; - var->nonstd = frm->nonstd; - if (fix != NULL) { - fix->type = frm->type; - fix->type_aux = frm->type_aux; - fix->visual = frm->visual; - fix->xpanstep = frm->xpanstep; - } + (var->nonstd == frm->nonstd)) return i; - } + if (var->bits_per_pixel == frm->bits_per_pixel) + stored = i; i++; frm++; } - return -EINVAL; + return stored; +} + +int svga_match_format(const struct svga_fb_format *frm, + struct fb_var_screeninfo *var, + struct fb_fix_screeninfo *fix) +{ + int i = match_format(frm, var); + + if (i >= 0) { + var->bits_per_pixel = frm[i].bits_per_pixel; + var->red = frm[i].red; + var->green = frm[i].green; + var->blue = frm[i].blue; + var->transp = frm[i].transp; + var->nonstd = frm[i].nonstd; + if (fix != NULL) { + fix->type = frm[i].type; + fix->type_aux = frm[i].type_aux; + fix->visual = frm[i].visual; + fix->xpanstep = frm[i].xpanstep; + } + } + + return i; } -- cgit v1.2.3