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tgafb accelerated code
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Add accelerated panning and accelerated color and mono image drawing.
Please apply.

Signed-off-by: James Simmons <jsimmons@infradead.org>
Acked-by: Maciej W. Rozycki <macro@linux-mips.org>  (tested, too!)
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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James Simmons authored and Linus Torvalds committed May 8, 2007
1 parent 86c6f7d commit 28b230e
Showing 1 changed file with 113 additions and 44 deletions.
157 changes: 113 additions & 44 deletions drivers/video/tgafb.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -59,6 +59,7 @@ static void tgafb_init_fix(struct fb_info *);
static void tgafb_imageblit(struct fb_info *, const struct fb_image *);
static void tgafb_fillrect(struct fb_info *, const struct fb_fillrect *);
static void tgafb_copyarea(struct fb_info *, const struct fb_copyarea *);
static int tgafb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info);

static int __devinit tgafb_register(struct device *dev);
static void __devexit tgafb_unregister(struct device *dev);
Expand All @@ -81,6 +82,7 @@ static struct fb_ops tgafb_ops = {
.fb_set_par = tgafb_set_par,
.fb_setcolreg = tgafb_setcolreg,
.fb_blank = tgafb_blank,
.fb_pan_display = tgafb_pan_display,
.fb_fillrect = tgafb_fillrect,
.fb_copyarea = tgafb_copyarea,
.fb_imageblit = tgafb_imageblit,
Expand Down Expand Up @@ -319,21 +321,7 @@ tgafb_set_par(struct fb_info *info)
BT485_WRITE(par, 0x00, BT485_ADDR_PAL_WRITE);
TGA_WRITE_REG(par, BT485_DATA_PAL, TGA_RAMDAC_SETUP_REG);

#ifdef CONFIG_HW_CONSOLE
for (i = 0; i < 16; i++) {
int j = color_table[i];

TGA_WRITE_REG(par, default_red[j]|(BT485_DATA_PAL<<8),
TGA_RAMDAC_REG);
TGA_WRITE_REG(par, default_grn[j]|(BT485_DATA_PAL<<8),
TGA_RAMDAC_REG);
TGA_WRITE_REG(par, default_blu[j]|(BT485_DATA_PAL<<8),
TGA_RAMDAC_REG);
}
for (i = 0; i < 240 * 3; i += 4) {
#else
for (i = 0; i < 256 * 3; i += 4) {
#endif
TGA_WRITE_REG(par, 0x55 | (BT485_DATA_PAL << 8),
TGA_RAMDAC_REG);
TGA_WRITE_REG(par, 0x00 | (BT485_DATA_PAL << 8),
Expand All @@ -358,18 +346,7 @@ tgafb_set_par(struct fb_info *info)
BT459_LOAD_ADDR(par, 0x0000);
TGA_WRITE_REG(par, BT459_PALETTE << 2, TGA_RAMDAC_SETUP_REG);

#ifdef CONFIG_HW_CONSOLE
for (i = 0; i < 16; i++) {
int j = color_table[i];

TGA_WRITE_REG(par, default_red[j], TGA_RAMDAC_REG);
TGA_WRITE_REG(par, default_grn[j], TGA_RAMDAC_REG);
TGA_WRITE_REG(par, default_blu[j], TGA_RAMDAC_REG);
}
for (i = 0; i < 240 * 3; i += 4) {
#else
for (i = 0; i < 256 * 3; i += 4) {
#endif
TGA_WRITE_REG(par, 0x55, TGA_RAMDAC_REG);
TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
Expand Down Expand Up @@ -646,16 +623,8 @@ tgafb_blank(int blank, struct fb_info *info)
* Acceleration.
*/

/**
* tgafb_imageblit - REQUIRED function. Can use generic routines if
* non acclerated hardware and packed pixel based.
* Copies a image from system memory to the screen.
*
* @info: frame buffer structure that represents a single frame buffer
* @image: structure defining the image.
*/
static void
tgafb_imageblit(struct fb_info *info, const struct fb_image *image)
tgafb_mono_imageblit(struct fb_info *info, const struct fb_image *image)
{
struct tga_par *par = (struct tga_par *) info->par;
u32 fgcolor, bgcolor, dx, dy, width, height, vxres, vyres, pixelmask;
Expand All @@ -665,6 +634,17 @@ tgafb_imageblit(struct fb_info *info, const struct fb_image *image)
void __iomem *regs_base;
void __iomem *fb_base;

is8bpp = info->var.bits_per_pixel == 8;

/* For copies that aren't pixel expansion, there's little we
can do better than the generic code. */
/* ??? There is a DMA write mode; I wonder if that could be
made to pull the data from the image buffer... */
if (image->depth > 1) {
cfb_imageblit(info, image);
return;
}

dx = image->dx;
dy = image->dy;
width = image->width;
Expand All @@ -682,18 +662,8 @@ tgafb_imageblit(struct fb_info *info, const struct fb_image *image)
if (dy + height > vyres)
height = vyres - dy;

/* For copies that aren't pixel expansion, there's little we
can do better than the generic code. */
/* ??? There is a DMA write mode; I wonder if that could be
made to pull the data from the image buffer... */
if (image->depth > 1) {
cfb_imageblit(info, image);
return;
}

regs_base = par->tga_regs_base;
fb_base = par->tga_fb_base;
is8bpp = info->var.bits_per_pixel == 8;

/* Expand the color values to fill 32-bits. */
/* ??? Would be nice to notice colour changes elsewhere, so
Expand Down Expand Up @@ -871,6 +841,85 @@ tgafb_imageblit(struct fb_info *info, const struct fb_image *image)
regs_base + TGA_MODE_REG);
}

static void
tgafb_clut_imageblit(struct fb_info *info, const struct fb_image *image)
{
struct tga_par *par = (struct tga_par *) info->par;
u32 color, dx, dy, width, height, vxres, vyres;
u32 *palette = ((u32 *)info->pseudo_palette);
unsigned long pos, line_length, i, j;
const unsigned char *data;
void *regs_base, *fb_base;

dx = image->dx;
dy = image->dy;
width = image->width;
height = image->height;
vxres = info->var.xres_virtual;
vyres = info->var.yres_virtual;
line_length = info->fix.line_length;

/* Crop the image to the screen. */
if (dx > vxres || dy > vyres)
return;
if (dx + width > vxres)
width = vxres - dx;
if (dy + height > vyres)
height = vyres - dy;

regs_base = par->tga_regs_base;
fb_base = par->tga_fb_base;

pos = dy * line_length + (dx * 4);
data = image->data;

/* Now copy the image, color_expanding via the palette. */
for (i = 0; i < height; i++) {
for (j = 0; j < width; j++) {
color = palette[*data++];
__raw_writel(color, fb_base + pos + j*4);
}
pos += line_length;
}
}

/**
* tgafb_imageblit - REQUIRED function. Can use generic routines if
* non acclerated hardware and packed pixel based.
* Copies a image from system memory to the screen.
*
* @info: frame buffer structure that represents a single frame buffer
* @image: structure defining the image.
*/
static void
tgafb_imageblit(struct fb_info *info, const struct fb_image *image)
{
unsigned int is8bpp = info->var.bits_per_pixel == 8;

/* If a mono image, regardless of FB depth, go do it. */
if (image->depth == 1) {
tgafb_mono_imageblit(info, image);
return;
}

/* For copies that aren't pixel expansion, there's little we
can do better than the generic code. */
/* ??? There is a DMA write mode; I wonder if that could be
made to pull the data from the image buffer... */
if (image->depth == info->var.bits_per_pixel) {
cfb_imageblit(info, image);
return;
}

/* If 24-plane FB and the image is 8-plane with CLUT, we can do it. */
if (!is8bpp && image->depth == 8) {
tgafb_clut_imageblit(info, image);
return;
}

/* Silently return... */
}

/**
* tgafb_fillrect - REQUIRED function. Can use generic routines if
* non acclerated hardware and packed pixel based.
Expand Down Expand Up @@ -1480,6 +1529,26 @@ tgafb_init_fix(struct fb_info *info)
info->fix.ywrapstep = 0;

info->fix.accel = FB_ACCEL_DEC_TGA;

/*
* These are needed by fb_set_logo_truepalette(), so we
* set them here for 24-plane cards.
*/
if (tga_type != TGA_TYPE_8PLANE) {
info->var.red.length = 8;
info->var.green.length = 8;
info->var.blue.length = 8;
info->var.red.offset = 16;
info->var.green.offset = 8;
info->var.blue.offset = 0;
}
}

static int tgafb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
{
/* We just use this to catch switches out of graphics mode. */
tgafb_set_par(info); /* A bit of overkill for BASE_ADDR reset. */
return 0;
}

static int __devinit
Expand Down

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