[ARM] pxafb: cleanup of the color format manipulation code
1. introduce var_to_depth() to calculate the color depth including the
transparency bit
2. the conversion from 'fb_var_screeninfo' to LCCR3 BPP bits can be re-
used by overlays (in OVLxC1), thus an individual pxafb_var_to_bpp()
has been separated out.
3. pxafb_setmode() should really set the color bitfields correctly at
begining, introduce a pxafb_set_pixfmt() for this
4. allow user apps to specify color formats within fb_var_screeninfo,
and checking of this in pxafb_check_var() has been simplified as
below:
a) pxafb_var_to_bpp() should pass - which means a basically correct
bits_per_pixel and color depth setting
b) the RGBT bitfields are then forced into supported values by
pxafb_set_pixfmt()
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Eric Miao <ycmiao@ycmiao-hp520.(none)>
This commit is contained in:
Eric Miao
Eric Miao
Родитель
a0427509a7
Коммит
878f578319
|
|
@ -28,17 +28,7 @@
|
|||
#define CMDCR (0x100) /* Command Control Register */
|
||||
#define PRSR (0x104) /* Panel Read Status Register */
|
||||
|
||||
#define LCCR3_1BPP (0 << 24)
|
||||
#define LCCR3_2BPP (1 << 24)
|
||||
#define LCCR3_4BPP (2 << 24)
|
||||
#define LCCR3_8BPP (3 << 24)
|
||||
#define LCCR3_16BPP (4 << 24)
|
||||
#define LCCR3_18BPP (5 << 24)
|
||||
#define LCCR3_18BPP_P (6 << 24)
|
||||
#define LCCR3_19BPP (7 << 24)
|
||||
#define LCCR3_19BPP_P (1 << 29)
|
||||
#define LCCR3_24BPP ((1 << 29) | (1 << 24))
|
||||
#define LCCR3_25BPP ((1 << 29) | (2 << 24))
|
||||
#define LCCR3_BPP(x) ((((x) & 0x7) << 24) | (((x) & 0x8) ? (1 << 29) : 0))
|
||||
|
||||
#define LCCR3_PDFOR_0 (0 << 30)
|
||||
#define LCCR3_PDFOR_1 (1 << 30)
|
||||
|
|
@ -133,9 +123,6 @@
|
|||
#define LCCR3_PCD Fld (8, 0) /* Pixel Clock Divisor */
|
||||
#define LCCR3_PixClkDiv(Div) (((Div) << FShft (LCCR3_PCD)))
|
||||
|
||||
#define LCCR3_BPP Fld (3, 24) /* Bit Per Pixel */
|
||||
#define LCCR3_Bpp(Bpp) (((Bpp) << FShft (LCCR3_BPP)))
|
||||
|
||||
#define LCCR3_ACB Fld (8, 8) /* AC Bias */
|
||||
#define LCCR3_Acb(Acb) (((Acb) << FShft (LCCR3_ACB)))
|
||||
|
||||
|
|
|
|||
|
|
@ -66,7 +66,7 @@
|
|||
LCCR0_SFM | LCCR0_LDM | LCCR0_ENB)
|
||||
|
||||
#define LCCR3_INVALID_CONFIG_MASK (LCCR3_HSP | LCCR3_VSP |\
|
||||
LCCR3_PCD | LCCR3_BPP)
|
||||
LCCR3_PCD | LCCR3_BPP(0xf))
|
||||
|
||||
static int pxafb_activate_var(struct fb_var_screeninfo *var,
|
||||
struct pxafb_info *);
|
||||
|
|
@ -221,37 +221,110 @@ pxafb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
|
|||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* pxafb_bpp_to_lccr3():
|
||||
* Convert a bits per pixel value to the correct bit pattern for LCCR3
|
||||
*/
|
||||
static int pxafb_bpp_to_lccr3(struct fb_var_screeninfo *var)
|
||||
/* calculate pixel depth, transparency bit included, >=16bpp formats _only_ */
|
||||
static inline int var_to_depth(struct fb_var_screeninfo *var)
|
||||
{
|
||||
int ret = 0;
|
||||
return var->red.length + var->green.length +
|
||||
var->blue.length + var->transp.length;
|
||||
}
|
||||
|
||||
/* calculate 4-bit BPP value for LCCR3 and OVLxC1 */
|
||||
static int pxafb_var_to_bpp(struct fb_var_screeninfo *var)
|
||||
{
|
||||
int bpp = -EINVAL;
|
||||
|
||||
switch (var->bits_per_pixel) {
|
||||
case 1: ret = LCCR3_1BPP; break;
|
||||
case 2: ret = LCCR3_2BPP; break;
|
||||
case 4: ret = LCCR3_4BPP; break;
|
||||
case 8: ret = LCCR3_8BPP; break;
|
||||
case 16: ret = LCCR3_16BPP; break;
|
||||
case 1: bpp = 0; break;
|
||||
case 2: bpp = 1; break;
|
||||
case 4: bpp = 2; break;
|
||||
case 8: bpp = 3; break;
|
||||
case 16: bpp = 4; break;
|
||||
case 24:
|
||||
switch (var->red.length + var->green.length +
|
||||
var->blue.length + var->transp.length) {
|
||||
case 18: ret = LCCR3_18BPP_P | LCCR3_PDFOR_3; break;
|
||||
case 19: ret = LCCR3_19BPP_P; break;
|
||||
switch (var_to_depth(var)) {
|
||||
case 18: bpp = 6; break; /* 18-bits/pixel packed */
|
||||
case 19: bpp = 8; break; /* 19-bits/pixel packed */
|
||||
case 24: bpp = 9; break;
|
||||
}
|
||||
break;
|
||||
case 32:
|
||||
switch (var->red.length + var->green.length +
|
||||
var->blue.length + var->transp.length) {
|
||||
case 18: ret = LCCR3_18BPP | LCCR3_PDFOR_3; break;
|
||||
case 19: ret = LCCR3_19BPP; break;
|
||||
case 24: ret = LCCR3_24BPP | LCCR3_PDFOR_3; break;
|
||||
case 25: ret = LCCR3_25BPP; break;
|
||||
switch (var_to_depth(var)) {
|
||||
case 18: bpp = 5; break; /* 18-bits/pixel unpacked */
|
||||
case 19: bpp = 7; break; /* 19-bits/pixel unpacked */
|
||||
case 25: bpp = 10; break;
|
||||
}
|
||||
break;
|
||||
}
|
||||
return ret;
|
||||
return bpp;
|
||||
}
|
||||
|
||||
/*
|
||||
* pxafb_var_to_lccr3():
|
||||
* Convert a bits per pixel value to the correct bit pattern for LCCR3
|
||||
*
|
||||
* NOTE: for PXA27x with overlays support, the LCCR3_PDFOR_x bits have an
|
||||
* implication of the acutal use of transparency bit, which we handle it
|
||||
* here separatedly. See PXA27x Developer's Manual, Section <<7.4.6 Pixel
|
||||
* Formats>> for the valid combination of PDFOR, PAL_FOR for various BPP.
|
||||
*
|
||||
* Transparency for palette pixel formats is not supported at the moment.
|
||||
*/
|
||||
static uint32_t pxafb_var_to_lccr3(struct fb_var_screeninfo *var)
|
||||
{
|
||||
int bpp = pxafb_var_to_bpp(var);
|
||||
uint32_t lccr3;
|
||||
|
||||
if (bpp < 0)
|
||||
return 0;
|
||||
|
||||
lccr3 = LCCR3_BPP(bpp);
|
||||
|
||||
switch (var_to_depth(var)) {
|
||||
case 16: lccr3 |= var->transp.length ? LCCR3_PDFOR_3 : 0; break;
|
||||
case 18: lccr3 |= LCCR3_PDFOR_3; break;
|
||||
case 24: lccr3 |= var->transp.length ? LCCR3_PDFOR_2 : LCCR3_PDFOR_3;
|
||||
break;
|
||||
case 19:
|
||||
case 25: lccr3 |= LCCR3_PDFOR_0; break;
|
||||
}
|
||||
return lccr3;
|
||||
}
|
||||
|
||||
#define SET_PIXFMT(v, r, g, b, t) \
|
||||
({ \
|
||||
(v)->transp.offset = (t) ? (r) + (g) + (b) : 0; \
|
||||
(v)->transp.length = (t) ? (t) : 0; \
|
||||
(v)->blue.length = (b); (v)->blue.offset = 0; \
|
||||
(v)->green.length = (g); (v)->green.offset = (b); \
|
||||
(v)->red.length = (r); (v)->red.offset = (b) + (g); \
|
||||
})
|
||||
|
||||
/* set the RGBT bitfields of fb_var_screeninf according to
|
||||
* var->bits_per_pixel and given depth
|
||||
*/
|
||||
static void pxafb_set_pixfmt(struct fb_var_screeninfo *var, int depth)
|
||||
{
|
||||
if (depth == 0)
|
||||
depth = var->bits_per_pixel;
|
||||
|
||||
if (var->bits_per_pixel < 16) {
|
||||
/* indexed pixel formats */
|
||||
var->red.offset = 0; var->red.length = 8;
|
||||
var->green.offset = 0; var->green.length = 8;
|
||||
var->blue.offset = 0; var->blue.length = 8;
|
||||
var->transp.offset = 0; var->transp.length = 8;
|
||||
}
|
||||
|
||||
switch (depth) {
|
||||
case 16: var->transp.length ?
|
||||
SET_PIXFMT(var, 5, 5, 5, 1) : /* RGBT555 */
|
||||
SET_PIXFMT(var, 5, 6, 5, 0); break; /* RGB565 */
|
||||
case 18: SET_PIXFMT(var, 6, 6, 6, 0); break; /* RGB666 */
|
||||
case 19: SET_PIXFMT(var, 6, 6, 6, 1); break; /* RGBT666 */
|
||||
case 24: var->transp.length ?
|
||||
SET_PIXFMT(var, 8, 8, 7, 1) : /* RGBT887 */
|
||||
SET_PIXFMT(var, 8, 8, 8, 0); break; /* RGB888 */
|
||||
case 25: SET_PIXFMT(var, 8, 8, 8, 1); break; /* RGBT888 */
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef CONFIG_CPU_FREQ
|
||||
|
|
@ -313,6 +386,9 @@ static void pxafb_setmode(struct fb_var_screeninfo *var,
|
|||
var->lower_margin = mode->lower_margin;
|
||||
var->sync = mode->sync;
|
||||
var->grayscale = mode->cmap_greyscale;
|
||||
|
||||
/* set the initial RGBA bitfields */
|
||||
pxafb_set_pixfmt(var, mode->depth);
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -328,6 +404,7 @@ static int pxafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
|
|||
{
|
||||
struct pxafb_info *fbi = (struct pxafb_info *)info;
|
||||
struct pxafb_mach_info *inf = fbi->dev->platform_data;
|
||||
int err;
|
||||
|
||||
if (var->xres < MIN_XRES)
|
||||
var->xres = MIN_XRES;
|
||||
|
|
@ -359,60 +436,12 @@ static int pxafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
|
|||
else
|
||||
var->yres_virtual = max(var->yres_virtual, var->yres);
|
||||
|
||||
/*
|
||||
* Setup the RGB parameters for this display.
|
||||
*
|
||||
* The pixel packing format is described on page 7-11 of the
|
||||
* PXA2XX Developer's Manual.
|
||||
*/
|
||||
if (var->bits_per_pixel == 16) {
|
||||
var->red.offset = 11; var->red.length = 5;
|
||||
var->green.offset = 5; var->green.length = 6;
|
||||
var->blue.offset = 0; var->blue.length = 5;
|
||||
var->transp.offset = var->transp.length = 0;
|
||||
} else if (var->bits_per_pixel > 16) {
|
||||
struct pxafb_mode_info *mode;
|
||||
/* do a test conversion to BPP fields to check the color formats */
|
||||
err = pxafb_var_to_bpp(var);
|
||||
if (err < 0)
|
||||
return err;
|
||||
|
||||
mode = pxafb_getmode(inf, var);
|
||||
if (!mode)
|
||||
return -EINVAL;
|
||||
|
||||
switch (mode->depth) {
|
||||
case 18: /* RGB666 */
|
||||
var->transp.offset = var->transp.length = 0;
|
||||
var->red.offset = 12; var->red.length = 6;
|
||||
var->green.offset = 6; var->green.length = 6;
|
||||
var->blue.offset = 0; var->blue.length = 6;
|
||||
break;
|
||||
case 19: /* RGBT666 */
|
||||
var->transp.offset = 18; var->transp.length = 1;
|
||||
var->red.offset = 12; var->red.length = 6;
|
||||
var->green.offset = 6; var->green.length = 6;
|
||||
var->blue.offset = 0; var->blue.length = 6;
|
||||
break;
|
||||
case 24: /* RGB888 */
|
||||
var->transp.offset = var->transp.length = 0;
|
||||
var->red.offset = 16; var->red.length = 8;
|
||||
var->green.offset = 8; var->green.length = 8;
|
||||
var->blue.offset = 0; var->blue.length = 8;
|
||||
break;
|
||||
case 25: /* RGBT888 */
|
||||
var->transp.offset = 24; var->transp.length = 1;
|
||||
var->red.offset = 16; var->red.length = 8;
|
||||
var->green.offset = 8; var->green.length = 8;
|
||||
var->blue.offset = 0; var->blue.length = 8;
|
||||
break;
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
} else {
|
||||
var->red.offset = var->green.offset = 0;
|
||||
var->blue.offset = var->transp.offset = 0;
|
||||
var->red.length = 8;
|
||||
var->green.length = 8;
|
||||
var->blue.length = 8;
|
||||
var->transp.length = 0;
|
||||
}
|
||||
pxafb_set_pixfmt(var, var_to_depth(var));
|
||||
|
||||
#ifdef CONFIG_CPU_FREQ
|
||||
pr_debug("pxafb: dma period = %d ps\n",
|
||||
|
|
@ -978,7 +1007,7 @@ static int pxafb_activate_var(struct fb_var_screeninfo *var,
|
|||
(LCCR0_LDM | LCCR0_SFM | LCCR0_IUM | LCCR0_EFM |
|
||||
LCCR0_QDM | LCCR0_BM | LCCR0_OUM);
|
||||
|
||||
fbi->reg_lccr3 |= pxafb_bpp_to_lccr3(var);
|
||||
fbi->reg_lccr3 |= pxafb_var_to_lccr3(var);
|
||||
|
||||
fbi->reg_lccr4 = lcd_readl(fbi, LCCR4) & ~LCCR4_PAL_FOR_MASK;
|
||||
fbi->reg_lccr4 |= (fbi->lccr4 & LCCR4_PAL_FOR_MASK);
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче