openwrtv4/target/linux/brcm2708/patches-3.10/0167-bcm2708fb-Allow-swapping-of-red-blue-in-24-32-modes.patch

From 4e0660161587681630da35f525cacf17bed58795 Mon Sep 17 00:00:00 2001
From: popcornmix <popcornmix@gmail.com>
Date: Wed, 12 Feb 2014 12:01:56 +0000
Subject: [PATCH 167/174] bcm2708fb: Allow swapping of red/blue in 24/32 modes

---
 drivers/video/bcm2708_fb.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

--- a/drivers/video/bcm2708_fb.c
+++ b/drivers/video/bcm2708_fb.c
@@ -53,6 +53,7 @@ static u32 dma_busy_wait_threshold = 1<<
 module_param(dma_busy_wait_threshold, int, 0644);
 MODULE_PARM_DESC(dma_busy_wait_threshold, "Busy-wait for DMA completion below this area");
 
+static int fbswap = 0;     /* module parameter */
 
 /* this data structure describes each frame buffer device we find */
 
@@ -185,7 +186,12 @@ static int bcm2708_fb_set_bitfields(stru
 	 * encoded in the pixel data.  Calculate their position from
 	 * the bitfield length defined above.
 	 */
-	if (ret == 0 && var->bits_per_pixel >= 24) {
+	if (ret == 0 && var->bits_per_pixel >= 24 && fbswap) {
+		var->blue.offset = 0;
+		var->green.offset = var->blue.offset + var->blue.length;
+		var->red.offset = var->green.offset + var->green.length;
+		var->transp.offset = var->red.offset + var->red.length;
+	} else if (ret == 0 && var->bits_per_pixel >= 24) {
 		var->red.offset = 0;
 		var->green.offset = var->red.offset + var->red.length;
 		var->blue.offset = var->green.offset + var->green.length;
@@ -618,8 +624,8 @@ static int bcm2708_fb_register(struct bc
 
 	fb_set_var(&fb->fb, &fb->fb.var);
 
-	print_debug("BCM2708FB: registering framebuffer (%dx%d@%d)\n", fbwidth,
-		fbheight, fbdepth);
+	print_debug("BCM2708FB: registering framebuffer (%dx%d@%d) (%d)\n", fbwidth
+		fbheight, fbdepth, fbswap);
 
 	ret = register_framebuffer(&fb->fb);
 	print_debug("BCM2708FB: register framebuffer (%d)\n", ret);
@@ -746,6 +752,7 @@ module_exit(bcm2708_fb_exit);
 module_param(fbwidth, int, 0644);
 module_param(fbheight, int, 0644);
 module_param(fbdepth, int, 0644);
+module_param(fbswap, int, 0644);
 
 MODULE_DESCRIPTION("BCM2708 framebuffer driver");
 MODULE_LICENSE("GPL");
@@ -753,3 +760,4 @@ MODULE_LICENSE("GPL");
 MODULE_PARM_DESC(fbwidth, "Width of ARM Framebuffer");
 MODULE_PARM_DESC(fbheight, "Height of ARM Framebuffer");
 MODULE_PARM_DESC(fbdepth, "Bit depth of ARM Framebuffer");
+MODULE_PARM_DESC(fbswap, "Swap order of red and blue in 24 and 32 bit modes");