pm2fb: Permedia 2V hardware cursor support
This patch adds hardware cursor support for Permedia 2V chips.
The hardware cursor is disabled by default. It does not blink - the
same issue is mentioned in the x11 driver.
Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/video/pm2fb.c b/drivers/video/pm2fb.c
index 19cbde1..53dd639 100644
--- a/drivers/video/pm2fb.c
+++ b/drivers/video/pm2fb.c
@@ -66,6 +66,7 @@
/*
* Driver data
*/
+static int hwcursor;
static char *mode __devinitdata;
/*
@@ -1245,6 +1246,136 @@
pm2_WR(par, PM2R_SCISSOR_MODE, 0);
}
+/*
+ * Hardware cursor support.
+ */
+static const u8 cursor_bits_lookup[16] = {
+ 0x00, 0x40, 0x10, 0x50, 0x04, 0x44, 0x14, 0x54,
+ 0x01, 0x41, 0x11, 0x51, 0x05, 0x45, 0x15, 0x55
+};
+
+static int pm2vfb_cursor(struct fb_info *info, struct fb_cursor *cursor)
+{
+ struct pm2fb_par *par = info->par;
+ u8 mode;
+
+ if (!hwcursor)
+ return -EINVAL; /* just to force soft_cursor() call */
+
+ /* Too large of a cursor or wrong bpp :-( */
+ if (cursor->image.width > 64 ||
+ cursor->image.height > 64 ||
+ cursor->image.depth > 1)
+ return -EINVAL;
+
+ mode = PM2F_CURSORMODE_TYPE_X;
+ if (cursor->enable)
+ mode |= PM2F_CURSORMODE_CURSOR_ENABLE;
+
+ pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_MODE, mode);
+
+ /*
+ * If the cursor is not be changed this means either we want the
+ * current cursor state (if enable is set) or we want to query what
+ * we can do with the cursor (if enable is not set)
+ */
+ if (!cursor->set)
+ return 0;
+
+ if (cursor->set & FB_CUR_SETPOS) {
+ int x = cursor->image.dx - info->var.xoffset;
+ int y = cursor->image.dy - info->var.yoffset;
+
+ pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_X_LOW, x & 0xff);
+ pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_X_HIGH, (x >> 8) & 0xf);
+ pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_Y_LOW, y & 0xff);
+ pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_Y_HIGH, (y >> 8) & 0xf);
+ }
+
+ if (cursor->set & FB_CUR_SETHOT) {
+ pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_X_HOT,
+ cursor->hot.x & 0x3f);
+ pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_Y_HOT,
+ cursor->hot.y & 0x3f);
+ }
+
+ if (cursor->set & FB_CUR_SETCMAP) {
+ u32 fg_idx = cursor->image.fg_color;
+ u32 bg_idx = cursor->image.bg_color;
+ struct fb_cmap cmap = info->cmap;
+
+ /* the X11 driver says one should use these color registers */
+ pm2_WR(par, PM2VR_RD_INDEX_HIGH, PM2VI_RD_CURSOR_PALETTE >> 8);
+ pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_PALETTE + 0,
+ cmap.red[bg_idx] >> 8 );
+ pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_PALETTE + 1,
+ cmap.green[bg_idx] >> 8 );
+ pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_PALETTE + 2,
+ cmap.blue[bg_idx] >> 8 );
+
+ pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_PALETTE + 3,
+ cmap.red[fg_idx] >> 8 );
+ pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_PALETTE + 4,
+ cmap.green[fg_idx] >> 8 );
+ pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_PALETTE + 5,
+ cmap.blue[fg_idx] >> 8 );
+ pm2_WR(par, PM2VR_RD_INDEX_HIGH, 0);
+ }
+
+ if (cursor->set & (FB_CUR_SETSHAPE | FB_CUR_SETIMAGE)) {
+ u8 *bitmap = (u8 *)cursor->image.data;
+ u8 *mask = (u8 *)cursor->mask;
+ int i;
+ int pos = PM2VI_RD_CURSOR_PATTERN;
+
+ for (i = 0; i < cursor->image.height; i++) {
+ int j = (cursor->image.width + 7) >> 3;
+ int k = 8 - j;
+
+ pm2_WR(par, PM2VR_RD_INDEX_HIGH, pos >> 8);
+
+ for (; j > 0; j--) {
+ u8 data = *bitmap ^ *mask;
+
+ if (cursor->rop == ROP_COPY)
+ data = *mask & *bitmap;
+ /* Upper 4 bits of bitmap data */
+ pm2v_RDAC_WR(par, pos++,
+ cursor_bits_lookup[data >> 4] |
+ (cursor_bits_lookup[*mask >> 4] << 1));
+ /* Lower 4 bits of bitmap */
+ pm2v_RDAC_WR(par, pos++,
+ cursor_bits_lookup[data & 0xf] |
+ (cursor_bits_lookup[*mask & 0xf] << 1));
+ bitmap++;
+ mask++;
+ }
+ for (; k > 0; k--) {
+ pm2v_RDAC_WR(par, pos++, 0);
+ pm2v_RDAC_WR(par, pos++, 0);
+ }
+ }
+
+ while (pos < (1024 + PM2VI_RD_CURSOR_PATTERN)) {
+ pm2_WR(par, PM2VR_RD_INDEX_HIGH, pos >> 8);
+ pm2v_RDAC_WR(par, pos++, 0);
+ }
+
+ pm2_WR(par, PM2VR_RD_INDEX_HIGH, 0);
+ }
+ return 0;
+}
+
+static int pm2fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
+{
+ struct pm2fb_par *par = info->par;
+
+ if (par->type == PM2_TYPE_PERMEDIA2V)
+ return pm2vfb_cursor(info, cursor);
+
+ return -ENXIO;
+}
+
/* ------------ Hardware Independent Functions ------------ */
/*
@@ -1262,6 +1393,7 @@
.fb_copyarea = pm2fb_copyarea,
.fb_imageblit = pm2fb_imageblit,
.fb_sync = pm2fb_sync,
+ .fb_cursor = pm2fb_cursor,
};
/*
@@ -1550,6 +1682,8 @@
lowhsync = 1;
else if (!strcmp(this_opt, "lowvsync"))
lowvsync = 1;
+ else if (!strncmp(this_opt, "hwcursor=", 9))
+ hwcursor = simple_strtoul(this_opt + 9, NULL, 0);
#ifdef CONFIG_MTRR
else if (!strncmp(this_opt, "nomtrr", 6))
nomtrr = 1;
@@ -1601,6 +1735,9 @@
MODULE_PARM_DESC(lowvsync, "Force vertical sync low regardless of mode");
module_param(noaccel, bool, 0);
MODULE_PARM_DESC(noaccel, "Disable acceleration");
+module_param(hwcursor, int, 0644);
+MODULE_PARM_DESC(hwcursor, "Enable hardware cursor "
+ "(1=enable, 0=disable, default=0)");
#ifdef CONFIG_MTRR
module_param(nomtrr, bool, 0);
MODULE_PARM_DESC(nomtrr, "Disable MTRR support (0 or 1=disabled) (default=0)");