pxafb: introduce "struct pxafb_dma_buff" for palette and dma descriptors

Use structure and array for palette buffer and dma descriptors to:

1. better organize code for future expansion like overlays
2. separate palette and dma descriptors from frame buffer

Signed-off-by: eric miao <eric.miao@marvell.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 34 insertions, 12 deletions

diff --git a/drivers/video/pxafb.h b/drivers/video/pxafb.h
index c7c561df3b6..b777641c5e7 100644
--- a/drivers/video/pxafb.h
+++ b/drivers/video/pxafb.h
@@ -37,6 +37,36 @@ struct pxafb_dma_descriptor {
         unsigned int ldcmd;
 };
 
+enum {
+        PAL_NONE        = -1,
+        PAL_BASE        = 0,
+        PAL_OV1         = 1,
+        PAL_OV2         = 2,
+        PAL_MAX,
+};
+
+enum {
+        DMA_BASE        = 0,
+        DMA_UPPER       = 0,
+        DMA_LOWER       = 1,
+        DMA_OV1         = 1,
+        DMA_OV2_Y       = 2,
+        DMA_OV2_Cb      = 3,
+        DMA_OV2_Cr      = 4,
+        DMA_CURSOR      = 5,
+        DMA_CMD         = 6,
+        DMA_MAX,
+};
+
+/* maximum palette size - 256 entries, each 4 bytes long */
+#define PALETTE_SIZE    (256 * 4)
+
+struct pxafb_dma_buff {
+        unsigned char palette[PAL_MAX * PALETTE_SIZE];
+        struct pxafb_dma_descriptor pal_desc[PAL_MAX];
+        struct pxafb_dma_descriptor dma_desc[DMA_MAX];
+};
+
 struct pxafb_info {
         struct fb_info          fb;
         struct device           *dev;
@@ -44,6 +74,10 @@ struct pxafb_info {
 
         void __iomem            *mmio_base;
 
+        struct pxafb_dma_buff   *dma_buff;
+        dma_addr_t              dma_buff_phys;
+        dma_addr_t              fdadr[DMA_MAX];
+
         /*
          * These are the addresses we mapped
          * the framebuffer memory region to.
@@ -57,20 +91,8 @@ struct pxafb_info {
         u_char *                screen_cpu;     /* virtual address of frame buffer */
         dma_addr_t              screen_dma;     /* physical address of frame buffer */
         u16 *                   palette_cpu;    /* virtual address of palette memory */
-        dma_addr_t              palette_dma;    /* physical address of palette memory */
         u_int                   palette_size;
 
-        /* DMA descriptors */
-        struct pxafb_dma_descriptor *   dmadesc_fblow_cpu;
-        dma_addr_t              dmadesc_fblow_dma;
-        struct pxafb_dma_descriptor *   dmadesc_fbhigh_cpu;
-        dma_addr_t              dmadesc_fbhigh_dma;
-        struct pxafb_dma_descriptor *   dmadesc_palette_cpu;
-        dma_addr_t              dmadesc_palette_dma;
-
-        dma_addr_t              fdadr0;
-        dma_addr_t              fdadr1;
-
         u_int                   lccr0;
         u_int                   lccr3;
         u_int                   lccr4;