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[PATCH] ARM: Fix AMBA CLCD fb driver for 1bpp/STN mono panels

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Fix the AMBA CLCD framebuffer driver for 1bpp modes and STN
monochrome LCD panels.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
This commit is contained in:
Russell King 2005-04-28 10:38:19 +01:00
parent ea3f4eaca0
commit c4d12b98ea
2 changed files with 20 additions and 13 deletions
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6
drivers/video/amba-clcd.c
View file

@ -125,11 +125,11 @@ clcdfb_set_bitfields(struct clcd_fb *fb, struct fb_var_screeninfo *var)
case 2:
case 4:
case 8:
var->red.length = 8;
var->red.length = var->bits_per_pixel;
var->red.offset = 0;
var->green.length = 8;
var->green.length = var->bits_per_pixel;
var->green.offset = 0;
var->blue.length = 8;
var->blue.length = var->bits_per_pixel;
var->blue.offset = 0;
break;
case 16:

27
include/asm-arm/hardware/amba_clcd.h
View file

@ -153,7 +153,7 @@ struct clcd_fb {
static inline void clcdfb_decode(struct clcd_fb *fb, struct clcd_regs *regs)
{
u32 val;
u32 val, cpl;
/*
* Program the CLCD controller registers and start the CLCD
@ -164,7 +164,10 @@ static inline void clcdfb_decode(struct clcd_fb *fb, struct clcd_regs *regs)
val |= (fb->fb.var.left_margin - 1) << 24;
regs->tim0 = val;
val = fb->fb.var.yres - 1;
val = fb->fb.var.yres;
if (fb->panel->cntl & CNTL_LCDDUAL)
val /= 2;
val -= 1;
val |= (fb->fb.var.vsync_len - 1) << 10;
val |= fb->fb.var.lower_margin << 16;
val |= fb->fb.var.upper_margin << 24;
@ -174,13 +177,17 @@ static inline void clcdfb_decode(struct clcd_fb *fb, struct clcd_regs *regs)
val |= fb->fb.var.sync & FB_SYNC_HOR_HIGH_ACT ? 0 : TIM2_IHS;
val |= fb->fb.var.sync & FB_SYNC_VERT_HIGH_ACT ? 0 : TIM2_IVS;
if (fb->panel->cntl & CNTL_LCDTFT)
val |= (fb->fb.var.xres_virtual - 1) << 16;
else if (fb->panel->cntl & CNTL_LCDBW)
printk("what value for CPL for stnmono panels?");
else
val |= ((fb->fb.var.xres_virtual * 8 / 3) - 1) << 16;
regs->tim2 = val;
cpl = fb->fb.var.xres_virtual;
if (fb->panel->cntl & CNTL_LCDTFT) /* TFT */
/* / 1 */;
else if (!fb->fb.var.grayscale) /* STN color */
cpl = cpl * 8 / 3;
else if (fb->panel->cntl & CNTL_LCDMONO8) /* STN monochrome, 8bit */
cpl /= 8;
else /* STN monochrome, 4bit */
cpl /= 4;
regs->tim2 = val | ((cpl - 1) << 16);
regs->tim3 = fb->panel->tim3;
@ -216,7 +223,7 @@ static inline void clcdfb_decode(struct clcd_fb *fb, struct clcd_regs *regs)
static inline int clcdfb_check(struct clcd_fb *fb, struct fb_var_screeninfo *var)
{
var->xres_virtual = var->xres = (var->xres + 7) & ~7;
var->yres_virtual = var->yres;
var->yres_virtual = var->yres = (var->yres + 1) & ~1;
#define CHECK(e,l,h) (var->e < l || var->e > h)
if (CHECK(right_margin, (5+1), 256) || /* back porch */