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[PATCH] fbdev: Batch cmap changes at driver level 

This patch adds to the fbdev interface a set_cmap callback that allow the
driver to "batch" palette changes.  This is useful for drivers like
radeonfb which might require lenghtly workarounds on palette accesses, thus
allowing to factor out those workarounds efficiently.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Benjamin Herrenschmidt 2005-05-01 08:59:22 -07:00 committed by Linus Torvalds
parent 5b052d8bb3
commit 7149437669
3 changed files with 127 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

118
drivers/video/aty/radeon_base.c
View File

@ -1057,13 +1057,14 @@ static int radeonfb_blank (int blank, struct fb_info *info)
return radeon_screen_blank(rinfo, blank, 0);
}
static int radeonfb_setcolreg (unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp, struct fb_info *info)
static int radeon_setcolreg (unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp,
struct radeonfb_info *rinfo)
{
struct radeonfb_info *rinfo = info->par;
u32 pindex;
unsigned int i;
if (regno > 255)
return 1;
@ -1078,20 +1079,7 @@ static int radeonfb_setcolreg (unsigned regno, unsigned red, unsigned green,
pindex = regno;
if (!rinfo->asleep) {
u32 dac_cntl2, vclk_cntl = 0;
radeon_fifo_wait(9);
if (rinfo->is_mobility) {
vclk_cntl = INPLL(VCLK_ECP_CNTL);
OUTPLL(VCLK_ECP_CNTL, vclk_cntl & ~PIXCLK_DAC_ALWAYS_ONb);
}
/* Make sure we are on first palette */
if (rinfo->has_CRTC2) {
dac_cntl2 = INREG(DAC_CNTL2);
dac_cntl2 &= ~DAC2_PALETTE_ACCESS_CNTL;
OUTREG(DAC_CNTL2, dac_cntl2);
}
if (rinfo->bpp == 16) {
pindex = regno * 8;
@ -1101,24 +1089,27 @@ static int radeonfb_setcolreg (unsigned regno, unsigned red, unsigned green,
if (rinfo->depth == 15 && regno > 31)
return 1;
/* For 565, the green component is mixed one order below */
/* For 565, the green component is mixed one order
* below
*/
if (rinfo->depth == 16) {
OUTREG(PALETTE_INDEX, pindex>>1);
OUTREG(PALETTE_DATA, (rinfo->palette[regno>>1].red << 16) |
(green << 8) | (rinfo->palette[regno>>1].blue));
OUTREG(PALETTE_DATA,
(rinfo->palette[regno>>1].red << 16) |
(green << 8) |
(rinfo->palette[regno>>1].blue));
green = rinfo->palette[regno<<1].green;
}
}
if (rinfo->depth != 16 || regno < 32) {
OUTREG(PALETTE_INDEX, pindex);
OUTREG(PALETTE_DATA, (red << 16) | (green << 8) | blue);
OUTREG(PALETTE_DATA, (red << 16) |
(green << 8) | blue);
}
if (rinfo->is_mobility)
OUTPLL(VCLK_ECP_CNTL, vclk_cntl);
}
if (regno < 16) {
u32 *pal = info->pseudo_palette;
u32 *pal = rinfo->info->pseudo_palette;
switch (rinfo->depth) {
case 15:
pal[regno] = (regno << 10) | (regno << 5) | regno;
@ -1138,6 +1129,84 @@ static int radeonfb_setcolreg (unsigned regno, unsigned red, unsigned green,
return 0;
}
static int radeonfb_setcolreg (unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp,
struct fb_info *info)
{
struct radeonfb_info *rinfo = info->par;
u32 dac_cntl2, vclk_cntl = 0;
int rc;
if (!rinfo->asleep) {
if (rinfo->is_mobility) {
vclk_cntl = INPLL(VCLK_ECP_CNTL);
OUTPLL(VCLK_ECP_CNTL,
vclk_cntl & ~PIXCLK_DAC_ALWAYS_ONb);
}
/* Make sure we are on first palette */
if (rinfo->has_CRTC2) {
dac_cntl2 = INREG(DAC_CNTL2);
dac_cntl2 &= ~DAC2_PALETTE_ACCESS_CNTL;
OUTREG(DAC_CNTL2, dac_cntl2);
}
}
rc = radeon_setcolreg (regno, red, green, blue, transp, rinfo);
if (!rinfo->asleep && rinfo->is_mobility)
OUTPLL(VCLK_ECP_CNTL, vclk_cntl);
return rc;
}
static int radeonfb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
{
struct radeonfb_info *rinfo = info->par;
u16 *red, *green, *blue, *transp;
u32 dac_cntl2, vclk_cntl = 0;
int i, start, rc = 0;
if (!rinfo->asleep) {
if (rinfo->is_mobility) {
vclk_cntl = INPLL(VCLK_ECP_CNTL);
OUTPLL(VCLK_ECP_CNTL,
vclk_cntl & ~PIXCLK_DAC_ALWAYS_ONb);
}
/* Make sure we are on first palette */
if (rinfo->has_CRTC2) {
dac_cntl2 = INREG(DAC_CNTL2);
dac_cntl2 &= ~DAC2_PALETTE_ACCESS_CNTL;
OUTREG(DAC_CNTL2, dac_cntl2);
}
}
red = cmap->red;
green = cmap->green;
blue = cmap->blue;
transp = cmap->transp;
start = cmap->start;
for (i = 0; i < cmap->len; i++) {
u_int hred, hgreen, hblue, htransp = 0xffff;
hred = *red++;
hgreen = *green++;
hblue = *blue++;
if (transp)
htransp = *transp++;
rc = radeon_setcolreg (start++, hred, hgreen, hblue, htransp,
rinfo);
if (rc)
break;
}
if (!rinfo->asleep && rinfo->is_mobility)
OUTPLL(VCLK_ECP_CNTL, vclk_cntl);
return rc;
}
static void radeon_save_state (struct radeonfb_info *rinfo,
struct radeon_regs *save)
@ -1796,6 +1865,7 @@ static struct fb_ops radeonfb_ops = {
.fb_check_var = radeonfb_check_var,
.fb_set_par = radeonfb_set_par,
.fb_setcolreg = radeonfb_setcolreg,
.fb_setcmap = radeonfb_setcmap,
.fb_pan_display = radeonfb_pan_display,
.fb_blank = radeonfb_blank,
.fb_ioctl = radeonfb_ioctl,

32
drivers/video/fbcmap.c
View File

@ -222,8 +222,11 @@ int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *info)
transp = cmap->transp;
start = cmap->start;
if (start < 0 || !info->fbops->fb_setcolreg)
if (start < 0 || (!info->fbops->fb_setcolreg &&
!info->fbops->fb_setcmap))
return -EINVAL;
if (info->fbops->fb_setcmap)
return info->fbops->fb_setcmap(cmap, info);
for (i = 0; i < cmap->len; i++) {
hred = *red++;
hgreen = *green++;
@ -250,8 +253,33 @@ int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *info)
transp = cmap->transp;
start = cmap->start;
if (start < 0 || !info->fbops->fb_setcolreg)
if (start < 0 || (!info->fbops->fb_setcolreg &&
!info->fbops->fb_setcmap))
return -EINVAL;
/* If we can batch, do it */
if (info->fbops->fb_setcmap && cmap->len > 1) {
struct fb_cmap umap;
int size = cmap->len * sizeof(u16);
int rc;
memset(&umap, 0, sizeof(struct fb_cmap));
rc = fb_alloc_cmap(&umap, cmap->len, transp != NULL);
if (rc)
return rc;
if (copy_from_user(umap.red, red, size) ||
copy_from_user(umap.green, green, size) ||
copy_from_user(umap.blue, blue, size) ||
(transp && copy_from_user(umap.transp, transp, size))) {
rc = -EFAULT;
}
umap.start = start;
if (rc == 0)
rc = info->fbops->fb_setcmap(&umap, info);
fb_dealloc_cmap(&umap);
return rc;
}
for (i = 0; i < cmap->len; i++, red++, blue++, green++) {
if (get_user(hred, red) ||
get_user(hgreen, green) ||

3
include/linux/fb.h
View File

@ -563,6 +563,9 @@ struct fb_ops {
int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp, struct fb_info *info);
/* set color registers in batch */
int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info);
/* blank display */
int (*fb_blank)(int blank, struct fb_info *info);