viafb: 2D engine rewrite

This patch is a completly rewritten 2D engine.  The engine is no longer in
a default state but reinitialized every time to allow usage for both
framebuffers regardless of their settings.

The whole engine handling is concentrated in a big function which takes 16
parameters.  Although the number of parameters is worryingly it is good to
have a single funtion to deal with this stuff as it allows to easily
support different engines and avoids some code duplication.

On the way support for the new 2D engine in VX800 was added.  As the with
less code duplication but it is probably better to duplicate the code as
this way is easier to walk if VIA ever decides to release a new engine
which changes anything the driver touches.

The engine support for VX800 gives a notable boost in speed.  There are no
known regressions but as this patch changes paths I do neither have the
hardware nor documentation to check and has the possibility to put the
system in a critical state heavy testing is appreciated.

Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Scott Fang <ScottFang@viatech.com.cn>
Cc: Joseph Chan <JosephChan@via.com.tw>
Cc: Harald Welte <laforge@gnumonks.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 60 insertions, 166 deletions

diff --git a/drivers/video/via/viafbdev.c b/drivers/video/via/viafbdev.c
index 4a8853a..66921de 100644
--- a/drivers/video/via/viafbdev.c
+++ b/drivers/video/via/viafbdev.c
@@ -95,11 +95,8 @@ static int viafb_check_var(struct fb_var_screeninfo *var,
 	struct fb_info *info)
 {
 	int vmode_index, htotal, vtotal;
-	struct viafb_par *ppar;
+	struct viafb_par *ppar = info->par;
 	u32 long_refresh;
-	struct viafb_par *p_viafb_par;
-	ppar = info->par;
-
 
 	DEBUG_MSG(KERN_INFO "viafb_check_var!\n");
 	/* Sanity check */
@@ -144,22 +141,17 @@ static int viafb_check_var(struct fb_var_screeninfo *var,
 	/* Adjust var according to our driver's own table */
 	viafb_fill_var_timing_info(var, viafb_refresh, vmode_index);
 
-	/* This is indeed a patch for VT3353 */
-	if (!info->par)
-		return -1;
-	p_viafb_par = (struct viafb_par *)info->par;
-	if (p_viafb_par->chip_info->gfx_chip_name == UNICHROME_VX800)
-		var->accel_flags = 0;
-
 	return 0;
 }
 
 static int viafb_set_par(struct fb_info *info)
 {
+	struct viafb_par *viapar = info->par;
 	int vmode_index;
 	int vmode_index1 = 0;
 	DEBUG_MSG(KERN_INFO "viafb_set_par!\n");
 
+	viapar->depth = fb_get_color_depth(&info->var, &info->fix);
 	viafb_update_device_setting(info->var.xres, info->var.yres,
 			      info->var.bits_per_pixel, viafb_refresh, 0);
 
@@ -190,9 +182,6 @@ static int viafb_set_par(struct fb_info *info)
 		viafb_bpp = info->var.bits_per_pixel;
 		/* Update viafb_accel, it is necessary to our 2D accelerate */
 		viafb_accel = info->var.accel_flags;
-
-		if (viafb_accel)
-			viafb_set_2d_color_depth(info->var.bits_per_pixel);
 	}
 
 	return 0;
@@ -777,10 +766,11 @@ static int viafb_ioctl(struct fb_info *info, u_int cmd, u_long arg)
 static void viafb_fillrect(struct fb_info *info,
 	const struct fb_fillrect *rect)
 {
-	u32 col = 0, rop = 0;
-	int pitch;
+	struct viafb_par *viapar = info->par;
+	u32 fg_color;
+	u8 rop;
 
-	if (!viafb_accel) {
+	if (!viapar->shared->hw_bitblt) {
 		cfb_fillrect(info, rect);
 		return;
 	}
@@ -788,67 +778,30 @@ static void viafb_fillrect(struct fb_info *info,
 	if (!rect->width || !rect->height)
 		return;
 
-	switch (rect->rop) {
-	case ROP_XOR:
+	if (info->fix.visual == FB_VISUAL_TRUECOLOR)
+		fg_color = ((u32 *)info->pseudo_palette)[rect->color];
+	else
+		fg_color = rect->color;
+
+	if (rect->rop == ROP_XOR)
 		rop = 0x5A;
-		break;
-	case ROP_COPY:
-	default:
+	else
 		rop = 0xF0;
-		break;
-	}
-
-	switch (info->var.bits_per_pixel) {
-	case 8:
-		col = rect->color;
-		break;
-	case 16:
-		col = ((u32 *) (info->pseudo_palette))[rect->color];
-		break;
-	case 32:
-		col = ((u32 *) (info->pseudo_palette))[rect->color];
-		break;
-	}
-
-	/* BitBlt Source Address */
-	writel(0x0, viaparinfo->io_virt + VIA_REG_SRCPOS);
-	/* Source Base Address */
-	writel(0x0, viaparinfo->io_virt + VIA_REG_SRCBASE);
-	/* Destination Base Address */
-	writel((info->fix.smem_start - viafbinfo->fix.smem_start) >> 3,
-		   viaparinfo->io_virt + VIA_REG_DSTBASE);
-	/* Pitch */
-	pitch = (info->var.xres_virtual + 7) & ~7;
-	writel(VIA_PITCH_ENABLE |
-		   (((pitch *
-		      info->var.bits_per_pixel >> 3) >> 3) |
-		      (((pitch * info->
-		      var.bits_per_pixel >> 3) >> 3) << 16)),
-		      viaparinfo->io_virt + VIA_REG_PITCH);
-	/* BitBlt Destination Address */
-	writel(((rect->dy << 16) | rect->dx),
-		viaparinfo->io_virt + VIA_REG_DSTPOS);
-	/* Dimension: width & height */
-	writel((((rect->height - 1) << 16) | (rect->width - 1)),
-		viaparinfo->io_virt + VIA_REG_DIMENSION);
-	/* Forground color or Destination color */
-	writel(col, viaparinfo->io_virt + VIA_REG_FGCOLOR);
-	/* GE Command */
-	writel((0x01 | 0x2000 | (rop << 24)),
-		viaparinfo->io_virt + VIA_REG_GECMD);
 
+	DEBUG_MSG(KERN_DEBUG "viafb 2D engine: fillrect\n");
+	if (viapar->shared->hw_bitblt(viapar->io_virt, VIA_BITBLT_FILL,
+		rect->width, rect->height, info->var.bits_per_pixel,
+		viapar->vram_addr, info->fix.line_length, rect->dx, rect->dy,
+		NULL, 0, 0, 0, 0, fg_color, 0, rop))
+		cfb_fillrect(info, rect);
 }
 
 static void viafb_copyarea(struct fb_info *info,
 	const struct fb_copyarea *area)
 {
-	u32 dy = area->dy, sy = area->sy, direction = 0x0;
-	u32 sx = area->sx, dx = area->dx, width = area->width;
-	int pitch;
+	struct viafb_par *viapar = info->par;
 
-	DEBUG_MSG(KERN_INFO "viafb_copyarea!!\n");
-
-	if (!viafb_accel) {
+	if (!viapar->shared->hw_bitblt) {
 		cfb_copyarea(info, area);
 		return;
 	}
@@ -856,113 +809,48 @@ static void viafb_copyarea(struct fb_info *info,
 	if (!area->width || !area->height)
 		return;
 
-	if (sy < dy) {
-		dy += area->height - 1;
-		sy += area->height - 1;
-		direction |= 0x4000;
-	}
-
-	if (sx < dx) {
-		dx += width - 1;
-		sx += width - 1;
-		direction |= 0x8000;
-	}
-
-	/* Source Base Address */
-	writel((info->fix.smem_start - viafbinfo->fix.smem_start) >> 3,
-		   viaparinfo->io_virt + VIA_REG_SRCBASE);
-	/* Destination Base Address */
-	writel((info->fix.smem_start - viafbinfo->fix.smem_start) >> 3,
-		   viaparinfo->io_virt + VIA_REG_DSTBASE);
-	/* Pitch */
-	pitch = (info->var.xres_virtual + 7) & ~7;
-	/* VIA_PITCH_ENABLE can be omitted now. */
-	writel(VIA_PITCH_ENABLE |
-		   (((pitch *
-		      info->var.bits_per_pixel >> 3) >> 3) | (((pitch *
-								info->var.
-								bits_per_pixel
-								>> 3) >> 3)
-							      << 16)),
-				viaparinfo->io_virt + VIA_REG_PITCH);
-	/* BitBlt Source Address */
-	writel(((sy << 16) | sx), viaparinfo->io_virt + VIA_REG_SRCPOS);
-	/* BitBlt Destination Address */
-	writel(((dy << 16) | dx), viaparinfo->io_virt + VIA_REG_DSTPOS);
-	/* Dimension: width & height */
-	writel((((area->height - 1) << 16) | (area->width - 1)),
-		   viaparinfo->io_virt + VIA_REG_DIMENSION);
-	/* GE Command */
-	writel((0x01 | direction | (0xCC << 24)),
-		viaparinfo->io_virt + VIA_REG_GECMD);
-
+	DEBUG_MSG(KERN_DEBUG "viafb 2D engine: copyarea\n");
+	if (viapar->shared->hw_bitblt(viapar->io_virt, VIA_BITBLT_COLOR,
+		area->width, area->height, info->var.bits_per_pixel,
+		viapar->vram_addr, info->fix.line_length, area->dx, area->dy,
+		NULL, viapar->vram_addr, info->fix.line_length,
+		area->sx, area->sy, 0, 0, 0))
+		cfb_copyarea(info, area);
 }
 
 static void viafb_imageblit(struct fb_info *info,
 	const struct fb_image *image)
 {
-	u32 size, bg_col = 0, fg_col = 0, *udata;
-	int i;
-	int pitch;
+	struct viafb_par *viapar = info->par;
+	u32 fg_color = 0, bg_color = 0;
+	u8 op;
 
-	if (!viafb_accel) {
+	if (!viapar->shared->hw_bitblt ||
+		(image->depth != 1 && image->depth != viapar->depth)) {
 		cfb_imageblit(info, image);
 		return;
 	}
 
-	udata = (u32 *) image->data;
-
-	switch (info->var.bits_per_pixel) {
-	case 8:
-		bg_col = image->bg_color;
-		fg_col = image->fg_color;
-		break;
-	case 16:
-		bg_col = ((u32 *) (info->pseudo_palette))[image->bg_color];
-		fg_col = ((u32 *) (info->pseudo_palette))[image->fg_color];
-		break;
-	case 32:
-		bg_col = ((u32 *) (info->pseudo_palette))[image->bg_color];
-		fg_col = ((u32 *) (info->pseudo_palette))[image->fg_color];
-		break;
-	}
-	size = image->width * image->height;
-
-	/* Source Base Address */
-	writel(0x0, viaparinfo->io_virt + VIA_REG_SRCBASE);
-	/* Destination Base Address */
-	writel((info->fix.smem_start - viafbinfo->fix.smem_start) >> 3,
-		   viaparinfo->io_virt + VIA_REG_DSTBASE);
-	/* Pitch */
-	pitch = (info->var.xres_virtual + 7) & ~7;
-	writel(VIA_PITCH_ENABLE |
-		   (((pitch *
-		      info->var.bits_per_pixel >> 3) >> 3) | (((pitch *
-								info->var.
-								bits_per_pixel
-								>> 3) >> 3)
-							      << 16)),
-				viaparinfo->io_virt + VIA_REG_PITCH);
-	/* BitBlt Source Address */
-	writel(0x0, viaparinfo->io_virt + VIA_REG_SRCPOS);
-	/* BitBlt Destination Address */
-	writel(((image->dy << 16) | image->dx),
-		viaparinfo->io_virt + VIA_REG_DSTPOS);
-	/* Dimension: width & height */
-	writel((((image->height - 1) << 16) | (image->width - 1)),
-		   viaparinfo->io_virt + VIA_REG_DIMENSION);
-	/* fb color */
-	writel(fg_col, viaparinfo->io_virt + VIA_REG_FGCOLOR);
-	/* bg color */
-	writel(bg_col, viaparinfo->io_virt + VIA_REG_BGCOLOR);
-	/* GE Command */
-	writel(0xCC020142, viaparinfo->io_virt + VIA_REG_GECMD);
-
-	for (i = 0; i < size / 4; i++) {
-		writel(*udata, viaparinfo->io_virt + VIA_MMIO_BLTBASE);
-		udata++;
-	}
+	if (image->depth == 1) {
+		op = VIA_BITBLT_MONO;
+		if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
+			fg_color =
+				((u32 *)info->pseudo_palette)[image->fg_color];
+			bg_color =
+				((u32 *)info->pseudo_palette)[image->bg_color];
+		} else {
+			fg_color = image->fg_color;
+			bg_color = image->bg_color;
+		}
+	} else
+		op = VIA_BITBLT_COLOR;
 
+	DEBUG_MSG(KERN_DEBUG "viafb 2D engine: imageblit\n");
+	if (viapar->shared->hw_bitblt(viapar->io_virt, op,
+		image->width, image->height, info->var.bits_per_pixel,
+		viapar->vram_addr, info->fix.line_length, image->dx, image->dy,
+		(u32 *)image->data, 0, 0, 0, 0, fg_color, bg_color, 0))
+		cfb_imageblit(info, image);
 }
 
 static int viafb_cursor(struct fb_info *info, struct fb_cursor *cursor)
@@ -1961,6 +1849,7 @@ static int __devinit via_pci_probe(void)
 
 	viaparinfo = (struct viafb_par *)viafbinfo->par;
 	viaparinfo->shared = viafbinfo->par + viafb_par_length;
+	viaparinfo->vram_addr = 0;
 	viaparinfo->tmds_setting_info = &viaparinfo->shared->tmds_setting_info;
 	viaparinfo->lvds_setting_info = &viaparinfo->shared->lvds_setting_info;
 	viaparinfo->lvds_setting_info2 =
@@ -2007,7 +1896,7 @@ static int __devinit via_pci_probe(void)
 
 	viafbinfo->pseudo_palette = pseudo_pal;
 	if (viafb_accel) {
-		viafb_init_accel();
+		viafb_init_accel(viaparinfo->shared);
 		viafb_init_2d_engine();
 		viafb_hw_cursor_init();
 	}
@@ -2110,6 +1999,7 @@ static int __devinit via_pci_probe(void)
 		}
 		viaparinfo1 = viafbinfo1->par;
 		memcpy(viaparinfo1, viaparinfo, viafb_par_length);
+		viaparinfo1->vram_addr = viafb_second_offset;
 		viaparinfo1->memsize = viaparinfo->memsize -
 			viafb_second_offset;
 		viaparinfo->memsize = viafb_second_offset;
@@ -2157,12 +2047,16 @@ static int __devinit via_pci_probe(void)
 		viafb_check_var(&default_var, viafbinfo1);
 		viafbinfo1->var = default_var;
 		viafb_update_fix(viafbinfo1);
+		viaparinfo1->depth = fb_get_color_depth(&viafbinfo1->var,
+			&viafbinfo1->fix);
 	}
 
 	viafb_setup_fixinfo(&viafbinfo->fix, viaparinfo);
 	viafb_check_var(&default_var, viafbinfo);
 	viafbinfo->var = default_var;
 	viafb_update_fix(viafbinfo);
+	viaparinfo->depth = fb_get_color_depth(&viafbinfo->var,
+		&viafbinfo->fix);
 	default_var.activate = FB_ACTIVATE_NOW;
 	fb_alloc_cmap(&viafbinfo->cmap, 256, 0);