path: root/recipes/linux/gumstix-kernel-2.6.21/pxafb-18bpp-mode.patch

Index: linux-2.6.21gum/drivers/video/pxafb.c
===================================================================
--- linux-2.6.21gum.orig/drivers/video/pxafb.c
+++ linux-2.6.21gum/drivers/video/pxafb.c
@@ -191,6 +191,10 @@ static int pxafb_bpp_to_lccr3(struct fb_
         case 4:  ret = LCCR3_4BPP; break;
         case 8:  ret = LCCR3_8BPP; break;
         case 16: ret = LCCR3_16BPP; break;
+	case 18: ret = (var->nonstd == 24 ? LCCR3_18BPP_PACKED : LCCR3_18BPP); break; 
+	case 19: ret = (var->nonstd == 24 ? LCCR3_19BPP_PACKED : LCCR3_19BPP); break; 
+        case 24: ret = LCCR3_24BPP; break;
+        case 25: ret = LCCR3_25BPP; break;
         }
         return ret;
 }
@@ -204,11 +208,12 @@ static int pxafb_bpp_to_lccr3(struct fb_
  */
 static unsigned int pxafb_display_dma_period(struct fb_var_screeninfo *var)
 {
-       /*
-        * Period = pixclock * bits_per_byte * bytes_per_transfer
-        *              / memory_bits_per_pixel;
-        */
-       return var->pixclock * 8 * 16 / var->bits_per_pixel;
+	/*
+	 * Period = pixclock * bits_per_byte * bytes_per_transfer
+	 *              / memory_bits_per_pixel;
+	 */
+	struct pxafb_mach_info *inf = fbi->dev->platform_data;
+	return var->pixclock * 8 * 16 / (var->nonstd ? var->nonstd : var->bits_per_pixel);
 }
 
 extern unsigned int get_clk_frequency_khz(int info);
@@ -307,6 +312,26 @@ static int pxafb_check_var(struct fb_var
 		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 == 18) {
+		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;
+	} else if (var->bits_per_pixel == 19) {
+		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;
+	} else if (var->bits_per_pixel == 24) {
+		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;
+	} else if (var->bits_per_pixel == 25) {
+		var->transp.offset = 18; 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;
 	} else {
 		var->red.offset = var->green.offset = var->blue.offset = var->transp.offset = 0;
 		var->red.length   = 8;
@@ -342,7 +367,7 @@ static int pxafb_set_par(struct fb_info 
 
 	pr_debug("pxafb: set_par\n");
 
-	if (var->bits_per_pixel == 16)
+	if (var->bits_per_pixel >= 16)
 		fbi->fb.fix.visual = FB_VISUAL_TRUECOLOR;
 	else if (!fbi->cmap_static)
 		fbi->fb.fix.visual = FB_VISUAL_PSEUDOCOLOR;
@@ -355,9 +380,10 @@ static int pxafb_set_par(struct fb_info 
 		fbi->fb.fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
 	}
 
-	fbi->fb.fix.line_length = var->xres_virtual *
-				  var->bits_per_pixel / 8;
-	if (var->bits_per_pixel == 16)
+		fbi->fb.fix.line_length = var->xres_virtual *
+					  (var->nonstd ? var->nonstd : var->bits_per_pixel) / 8;
+
+	if (var->bits_per_pixel >= 16)
 		fbi->palette_size = 0;
 	else
 		fbi->palette_size = var->bits_per_pixel == 1 ? 4 : 1 << var->bits_per_pixel;
@@ -374,7 +400,7 @@ static int pxafb_set_par(struct fb_info 
 	 */
 	pxafb_set_truecolor(fbi->fb.fix.visual == FB_VISUAL_TRUECOLOR);
 
-	if (fbi->fb.var.bits_per_pixel == 16)
+	if (fbi->fb.var.bits_per_pixel >= 16)
 		fb_dealloc_cmap(&fbi->fb.cmap);
 	else
 		fb_alloc_cmap(&fbi->fb.cmap, 1<<fbi->fb.var.bits_per_pixel, 0);
@@ -584,6 +610,14 @@ static int pxafb_activate_var(struct fb_
 	case 8:
 	case 16:
 		break;
+	case 18:
+	case 19:
+	case 24:
+	case 25:
+		if(var->nonstd) break;
+		printk(KERN_ERR "%s: must specify nonstd when bit depth==%d\n",
+			fbi->fb.fix.id, var->bits_per_pixel);
+		break;
 	default:
 		printk(KERN_ERR "%s: invalid bit depth %d\n",
 		       fbi->fb.fix.id, var->bits_per_pixel);
@@ -679,7 +713,7 @@ static int pxafb_activate_var(struct fb_
 	fbi->dmadesc_palette_cpu->fidr  = 0;
 	fbi->dmadesc_palette_cpu->ldcmd = (fbi->palette_size * 2) | LDCMD_PAL;
 
-	if (var->bits_per_pixel == 16) {
+	if (var->bits_per_pixel >= 16) {
 		/* palette shouldn't be loaded in true-color mode */
 		fbi->dmadesc_fbhigh_cpu->fdadr = fbi->dmadesc_fbhigh_dma;
 		fbi->fdadr0 = fbi->dmadesc_fbhigh_dma; /* no pal just fbhigh */
@@ -785,8 +819,19 @@ static void pxafb_setup_gpio(struct pxaf
 		return;
         }
 
-	for (gpio = 58; ldd_bits; gpio++, ldd_bits--)
+	for (gpio = 58; min(ldd_bits,16); gpio++, ldd_bits--)
 		pxa_gpio_mode(gpio | GPIO_ALT_FN_2_OUT);
+
+	switch(fbi->fb.var.bits_per_pixel)
+	{
+		case 25:
+		case 24:
+		case 19:
+		case 18:
+			pxa_gpio_mode(GPIO86_LDD_16_MD);
+			pxa_gpio_mode(GPIO87_LDD_17_MD);
+		default: break;
+	}
 	pxa_gpio_mode(GPIO74_LCD_FCLK_MD);
 	pxa_gpio_mode(GPIO75_LCD_LCLK_MD);
 	pxa_gpio_mode(GPIO76_LCD_PCLK_MD);
@@ -1135,7 +1180,7 @@ static struct pxafb_info * __init pxafb_
 	fbi->fb.fix.ywrapstep	= 0;
 	fbi->fb.fix.accel	= FB_ACCEL_NONE;
 
-	fbi->fb.var.nonstd	= 0;
+	fbi->fb.var.nonstd	= mode->nonstd;
 	fbi->fb.var.activate	= FB_ACTIVATE_NOW;
 	fbi->fb.var.height	= -1;
 	fbi->fb.var.width	= -1;
@@ -1161,7 +1206,7 @@ static struct pxafb_info * __init pxafb_
 	fbi->task_state			= (u_char)-1;
 
 	for (i = 0; i < inf->num_modes; i++) {
-		smemlen = mode[i].xres * mode[i].yres * mode[i].bpp / 8;
+		smemlen = mode[i].xres * mode[i].yres * (mode[i].nonstd ? mode[i].nonstd : mode[i].bpp) / 8;
 		if (smemlen > fbi->fb.fix.smem_len)
 			fbi->fb.fix.smem_len = smemlen;
 	}
@@ -1189,12 +1234,19 @@ static int __init pxafb_parse_options(st
                 if (!strncmp(this_opt, "mode:", 5)) {
 			const char *name = this_opt+5;
 			unsigned int namelen = strlen(name);
-			int res_specified = 0, bpp_specified = 0;
-			unsigned int xres = 0, yres = 0, bpp = 0;
+			int res_specified = 0, bpp_specified = 0, nonstd_specified = 0;
+			unsigned int xres = 0, yres = 0, bpp = 0, nonstd = 0;
 			int yres_specified = 0;
 			int i;
 			for (i = namelen-1; i >= 0; i--) {
 				switch (name[i]) {
+				case '/':
+					if (!nonstd_specified) {
+						nonstd = simple_strtoul(&name[i+1], NULL, 0);
+						nonstd_specified = 1;
+					} else
+						goto done;
+					break;
 				case '-':
 					namelen = i;
 					if (!bpp_specified && !yres_specified) {
@@ -1227,12 +1279,29 @@ static int __init pxafb_parse_options(st
 			}
 			if (bpp_specified)
 				switch (bpp) {
+				case 18:
+				case 19:
+				case 24:
+				case 25:
+					if(nonstd_specified && (((bpp == 18 || bpp == 19) && nonstd == 24) || nonstd == 32))
+					{
+						inf->modes[0].nonstd = nonstd;
+						dev_info(dev, "overriding nonstd pixel packing: %d\n",nonstd);
+					} else {
+						dev_err(dev, "Depth %d requires nonstd to be specified\n",bpp);
+						break;
+					}
 				case 1:
 				case 2:
 				case 4:
 				case 8:
 				case 16:
 					inf->modes[0].bpp = bpp;
+					if(nonstd_specified) {
+						dev_err(dev, "Depth %d requires nonstd to *not* be specified\n",bpp);
+					} else {
+						inf->modes[0].nonstd = 0;
+					}
 					dev_info(dev, "overriding bit depth: %d\n", bpp);
 					break;
 				default:
Index: linux-2.6.21gum/include/asm-arm/arch-pxa/pxa-regs.h
===================================================================
--- linux-2.6.21gum.orig/include/asm-arm/arch-pxa/pxa-regs.h
+++ linux-2.6.21gum/include/asm-arm/arch-pxa/pxa-regs.h
@@ -1323,6 +1323,8 @@
 #define GPIO83_NSTXD		83	/* NSSP transmit */
 #define GPIO84_NSRXD		84	/* NSSP receive */
 #define GPIO85_nPCE_1		85	/* Card Enable for Card Space (PXA27x) */
+#define GPIO86_LDD_16		86	/* LCD data pin 16 */
+#define GPIO87_LDD_17		87	/* LCD data pin 17 */
 #define GPIO92_MMCDAT0		92	/* MMC DAT0 (PXA27x) */
 #define GPIO102_nPCE_1		102	/* PCMCIA (PXA27x) */
 #define GPIO105_nPCE_2		105	/* Card Enable for Card Space (PXA27x) */
@@ -1468,6 +1470,8 @@
 #define GPIO84_NSSP_TX      	(84 | GPIO_ALT_FN_1_OUT)
 #define GPIO84_NSSP_RX      	(84 | GPIO_ALT_FN_2_IN)
 #define GPIO85_nPCE_1_MD	(85 | GPIO_ALT_FN_1_OUT)
+#define GPIO86_LDD_16_MD	(86 | GPIO_ALT_FN_2_OUT)
+#define GPIO87_LDD_17_MD	(87 | GPIO_ALT_FN_2_OUT)
 #define GPIO92_MMCDAT0_MD	(92 | GPIO_ALT_FN_1_OUT)
 #define GPIO102_nPCE_1_MD	(102 | GPIO_ALT_FN_1_OUT)
 #define GPIO104_pSKTSEL_MD	(104 | GPIO_ALT_FN_1_OUT)
@@ -1878,6 +1882,12 @@
 #define LCCR3_4BPP (2 << 24)
 #define LCCR3_8BPP (3 << 24)
 #define LCCR3_16BPP (4 << 24)
+#define LCCR3_18BPP (5 << 24)
+#define LCCR3_18BPP_PACKED (6 << 24)
+#define LCCR3_19BPP (7 << 24)
+#define LCCR3_19BPP_PACKED (1 << 29)
+#define LCCR3_24BPP ((1 << 29) | (1 << 24))
+#define LCCR3_25BPP ((1 << 29) | (2 << 24))
 
 #define FDADR0		__REG(0x44000200)  /* DMA Channel 0 Frame Descriptor Address Register */
 #define FSADR0		__REG(0x44000204)  /* DMA Channel 0 Frame Source Address Register */
Index: linux-2.6.21gum/include/asm-arm/arch-pxa/pxafb.h
===================================================================
--- linux-2.6.21gum.orig/include/asm-arm/arch-pxa/pxafb.h
+++ linux-2.6.21gum/include/asm-arm/arch-pxa/pxafb.h
@@ -25,6 +25,7 @@ struct pxafb_mode_info {
 	u_short		xres;
 	u_short		yres;
 
+	/* bpp is the path-to-screen bits per pixel, not the in-memory storage required */
 	u_char		bpp;
 	u_char		hsync_len;
 	u_char		left_margin;
@@ -36,7 +37,9 @@ struct pxafb_mode_info {
 	u_char		sync;
 
 	u_int		cmap_greyscale:1,
-			unused:31;
+			nonstd:8,	/* nonstd represents the in-memory bits per pixel
+						ie 24 or 32 for 18/19bpp mode, or 32 for 24/25bpp mode */
+			unused:23;
 };
 
 struct pxafb_mach_info {
Index: linux-2.6.21gum/arch/arm/mach-pxa/gumstix.c
===================================================================
--- linux-2.6.21gum.orig/arch/arm/mach-pxa/gumstix.c
+++ linux-2.6.21gum/arch/arm/mach-pxa/gumstix.c
@@ -146,7 +146,8 @@ static struct pxafb_mode_info gumstix_fb
 	.pixclock	= 110000,
 	.xres		= 480,
 	.yres		= 272,
-	.bpp		= 16,
+	.bpp		= 18,
+	.nonstd		= 24,
 	.hsync_len	= 41,
 	.left_margin	= 2,
 	.right_margin	= 2,
@@ -174,7 +175,8 @@ static struct pxafb_mode_info gumstix_fb
 	.vsync_len	= 10, // VLW from datasheet: 10 typ
 	.upper_margin	= 2, // VBP - VLW from datasheet: 12 - 10 = 2
 	.lower_margin	= 4, // VFP from datasheet: 4 typ
-	.bpp		= 16,
+	.bpp		= 18,
+	.nonstd		= 24,
 	.sync		= 0, // Hsync and Vsync both active low
 };
 
Index: linux-2.6.21gum/drivers/video/cfbfillrect.c
===================================================================
--- linux-2.6.21gum.orig/drivers/video/cfbfillrect.c
+++ linux-2.6.21gum/drivers/video/cfbfillrect.c
@@ -62,7 +62,10 @@ pixel_to_pat( u32 bpp, u32 pixel)
 		return 0x0001001001001001ul*pixel;
 	case 16:
 		return 0x0001000100010001ul*pixel;
+	case 18:
+	case 19:
 	case 24:
+	case 25:
 		return 0x0000000001000001ul*pixel;
 	case 32:
 		return 0x0000000100000001ul*pixel;
@@ -87,7 +90,10 @@ pixel_to_pat( u32 bpp, u32 pixel)
 		return 0x00001001ul*pixel;
 	case 16:
 		return 0x00010001ul*pixel;
+	case 18:
+	case 19:
 	case 24:
+	case 25:
 		return 0x00000001ul*pixel;
 	case 32:
 		return 0x00000001ul*pixel;
@@ -346,7 +352,7 @@ void cfb_fillrect(struct fb_info *p, con
 	unsigned long pat, fg;
 	unsigned long width = rect->width, height = rect->height;
 	int bits = BITS_PER_LONG, bytes = bits >> 3;
-	u32 bpp = p->var.bits_per_pixel;
+	u32 bpp = (p->var.nonstd ? p->var.nonstd : p->var.bits_per_pixel);
 	unsigned long __iomem *dst;
 	int dst_idx, left;
 
Index: linux-2.6.21gum/drivers/video/cfbimgblt.c
===================================================================
--- linux-2.6.21gum.orig/drivers/video/cfbimgblt.c
+++ linux-2.6.21gum/drivers/video/cfbimgblt.c
@@ -83,7 +83,7 @@ static inline void color_imageblit(const
 	/* Draw the penguin */
 	u32 __iomem *dst, *dst2;
 	u32 color = 0, val, shift;
-	int i, n, bpp = p->var.bits_per_pixel;
+	int i, n, bpp = (p->var.nonstd ? p->var.nonstd : p->var.bits_per_pixel);
 	u32 null_bits = 32 - bpp;
 	u32 *palette = (u32 *) p->pseudo_palette;
 	const u8 *src = image->data;
@@ -140,7 +140,7 @@ static inline void slow_imageblit(const 
 				  u32 start_index,
 				  u32 pitch_index)
 {
-	u32 shift, color = 0, bpp = p->var.bits_per_pixel;
+	u32 shift, color = 0, bpp = (p->var.nonstd ? p->var.nonstd : p->var.bits_per_pixel);
 	u32 __iomem *dst, *dst2;
 	u32 val, pitch = p->fix.line_length;
 	u32 null_bits = 32 - bpp;
@@ -213,7 +213,7 @@ static inline void fast_imageblit(const 
 				  u8 __iomem *dst1, u32 fgcolor, 
 				  u32 bgcolor) 
 {
-	u32 fgx = fgcolor, bgx = bgcolor, bpp = p->var.bits_per_pixel;
+	u32 fgx = fgcolor, bgx = bgcolor, bpp = (p->var.nonstd ? p->var.nonstd : p->var.bits_per_pixel);
 	u32 ppw = 32/bpp, spitch = (image->width + 7)/8;
 	u32 bit_mask, end_mask, eorx, shift;
 	const char *s = image->data, *src;
@@ -262,7 +262,7 @@ static inline void fast_imageblit(const 
 void cfb_imageblit(struct fb_info *p, const struct fb_image *image)
 {
 	u32 fgcolor, bgcolor, start_index, bitstart, pitch_index = 0;
-	u32 bpl = sizeof(u32), bpp = p->var.bits_per_pixel;
+	u32 bpl = sizeof(u32), bpp = (p->var.nonstd ? p->var.nonstd : p->var.bits_per_pixel);
 	u32 width = image->width;
 	u32 dx = image->dx, dy = image->dy;
 	u8 __iomem *dst1;
Index: linux-2.6.21gum/drivers/video/cfbcopyarea.c
===================================================================
--- linux-2.6.21gum.orig/drivers/video/cfbcopyarea.c
+++ linux-2.6.21gum/drivers/video/cfbcopyarea.c
@@ -365,8 +365,8 @@ void cfb_copyarea(struct fb_info *p, con
 	dst = src = (unsigned long __iomem *)((unsigned long)p->screen_base & ~(bytes-1));
 	dst_idx = src_idx = 8*((unsigned long)p->screen_base & (bytes-1));
 	// add offset of source and target area
-	dst_idx += dy*bits_per_line + dx*p->var.bits_per_pixel;
-	src_idx += sy*bits_per_line + sx*p->var.bits_per_pixel;
+	dst_idx += dy*bits_per_line + dx*(p->var.nonstd ? p->var.nonstd : p->var.bits_per_pixel);
+	src_idx += sy*bits_per_line + sx*(p->var.nonstd ? p->var.nonstd : p->var.bits_per_pixel);
 
 	if (p->fbops->fb_sync)
 		p->fbops->fb_sync(p);
@@ -380,7 +380,7 @@ void cfb_copyarea(struct fb_info *p, con
 			src += src_idx >> (ffs(bits) - 1);
 			src_idx &= (bytes - 1);
 			bitcpy_rev(dst, dst_idx, src, src_idx, bits,
-				width*p->var.bits_per_pixel);
+				width*(p->var.nonstd ? p->var.nonstd : p->var.bits_per_pixel));
 		}
 	} else {
 		while (height--) {
@@ -389,7 +389,7 @@ void cfb_copyarea(struct fb_info *p, con
 			src += src_idx >> (ffs(bits) - 1);
 			src_idx &= (bytes - 1);
 			bitcpy(dst, dst_idx, src, src_idx, bits,
-				width*p->var.bits_per_pixel);
+				width*(p->var.nonstd ? p->var.nonstd : p->var.bits_per_pixel));
 			dst_idx += bits_per_line;
 			src_idx += bits_per_line;
 		}
Index: linux-2.6.21gum/drivers/video/console/fbcon.c
===================================================================
--- linux-2.6.21gum.orig/drivers/video/console/fbcon.c
+++ linux-2.6.21gum/drivers/video/console/fbcon.c
@@ -983,9 +983,10 @@ static const char *fbcon_startup(void)
 
 	DPRINTK("mode:   %s\n", info->fix.id);
 	DPRINTK("visual: %d\n", info->fix.visual);
-	DPRINTK("res:    %dx%d-%d\n", info->var.xres,
+	DPRINTK("res:    %dx%d-%d(%d)\n", info->var.xres,
 		info->var.yres,
-		info->var.bits_per_pixel);
+		info->var.bits_per_pixel,
+		info->var.nonstd ? info->var.nonstd : info->var.bits_per_pixel);
 
 #ifdef CONFIG_ATARI
 	if (MACH_IS_ATARI) {
Index: linux-2.6.21gum/Documentation/fb/pxafb.txt
===================================================================
--- linux-2.6.21gum.orig/Documentation/fb/pxafb.txt
+++ linux-2.6.21gum/Documentation/fb/pxafb.txt
@@ -9,11 +9,13 @@ For example:
 or on the kernel command line
 	video=pxafb:mode:640x480-8,passive
 
-mode:XRESxYRES[-BPP]
+mode:XRESxYRES[-BPP[/PACKING]]
 	XRES == LCCR1_PPL + 1
 	YRES == LLCR2_LPP + 1
 		The resolution of the display in pixels
 	BPP == The bit depth. Valid values are 1, 2, 4, 8 and 16.
+	PACKING == The in-memory bits per pixel.  Valid values are 24, 32 when
+			BPP == 18,19,24,25
 
 pixclock:PIXCLOCK
 	Pixel clock in picoseconds