[ARM] pxafb: add support for FBIOPAN_DISPLAY by dma braching

dma branching is enabled by extending the current setup_frame_dma()
function to allow a 2nd set of frame/palette dma descriptors to be
used.

As a result, pxafb_dma_buff.dma_desc[], pxafb_dma_buff.pal_desc[]
and pxafb_info.fdadr[] are doubled.

This allows maximum re-use of the current dma setup code, although
the pxafb_info.fdadr[xx] for FBRx register values looks a bit odd.

Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Eric Miao <ycmiao@ycmiao-hp520.(none)>

1 files changed, 8 insertions, 2 deletions

diff --git a/arch/arm/mach-pxa/include/mach/regs-lcd.h b/arch/arm/mach-pxa/include/mach/regs-lcd.h
index f817878d256b..c15df557fa8a 100644
--- a/arch/arm/mach-pxa/include/mach/regs-lcd.h
+++ b/arch/arm/mach-pxa/include/mach/regs-lcd.h
@@ -12,13 +12,19 @@
 #define LCCR3           (0x00C) /* LCD Controller Control Register 3 */
 #define LCCR4           (0x010) /* LCD Controller Control Register 4 */
 #define LCCR5           (0x014) /* LCD Controller Control Register 5 */
-#define DFBR0           (0x020) /* DMA Channel 0 Frame Branch Register */
-#define DFBR1           (0x024) /* DMA Channel 1 Frame Branch Register */
 #define LCSR            (0x038) /* LCD Controller Status Register */
 #define LIIDR           (0x03C) /* LCD Controller Interrupt ID Register */
 #define TMEDRGBR        (0x040) /* TMED RGB Seed Register */
 #define TMEDCR          (0x044) /* TMED Control Register */
 
+#define FBR0            (0x020) /* DMA Channel 0 Frame Branch Register */
+#define FBR1            (0x024) /* DMA Channel 1 Frame Branch Register */
+#define FBR2            (0x028) /* DMA Channel 2 Frame Branch Register */
+#define FBR3            (0x02C) /* DMA Channel 2 Frame Branch Register */
+#define FBR4            (0x030) /* DMA Channel 2 Frame Branch Register */
+#define FBR5            (0x110) /* DMA Channel 2 Frame Branch Register */
+#define FBR6            (0x114) /* DMA Channel 2 Frame Branch Register */
+
 #define CMDCR           (0x100) /* Command Control Register */
 #define PRSR            (0x104) /* Panel Read Status Register */