From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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>
---
25-akpm/drivers/video/aty/radeon_base.c | 118 +++++++++++++++++++++++++-------
25-akpm/drivers/video/fbcmap.c | 32 ++++++++
25-akpm/include/linux/fb.h | 3
3 files changed, 127 insertions(+), 26 deletions(-)
diff -puN drivers/video/aty/radeon_base.c~fbdev-batch-cmap-changes-at-driver-level drivers/video/aty/radeon_base.c
--- 25/drivers/video/aty/radeon_base.c~fbdev-batch-cmap-changes-at-driver-level 2005-04-10 16:29:54.000000000 -0700
+++ 25-akpm/drivers/video/aty/radeon_base.c 2005-04-10 16:29:54.000000000 -0700
@@ -1057,13 +1057,14 @@ static int radeonfb_blank (int blank, st
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
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
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
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,
diff -puN drivers/video/fbcmap.c~fbdev-batch-cmap-changes-at-driver-level drivers/video/fbcmap.c
--- 25/drivers/video/fbcmap.c~fbdev-batch-cmap-changes-at-driver-level 2005-04-10 16:29:54.000000000 -0700
+++ 25-akpm/drivers/video/fbcmap.c 2005-04-10 16:29:54.000000000 -0700
@@ -222,8 +222,11 @@ int fb_set_cmap(struct fb_cmap *cmap, st
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
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) ||
diff -puN include/linux/fb.h~fbdev-batch-cmap-changes-at-driver-level include/linux/fb.h
--- 25/include/linux/fb.h~fbdev-batch-cmap-changes-at-driver-level 2005-04-10 16:29:54.000000000 -0700
+++ 25-akpm/include/linux/fb.h 2005-04-10 16:29:54.000000000 -0700
@@ -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);
_