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>
diff --git a/drivers/video/pxafb.c b/drivers/video/pxafb.c
index d97dc93..4e8f68b 100644
--- a/drivers/video/pxafb.c
+++ b/drivers/video/pxafb.c
@@ -361,7 +361,6 @@
{
struct pxafb_info *fbi = (struct pxafb_info *)info;
struct fb_var_screeninfo *var = &info->var;
- unsigned long palette_mem_size;
if (var->bits_per_pixel == 16)
fbi->fb.fix.visual = FB_VISUAL_TRUECOLOR;
@@ -384,13 +383,7 @@
fbi->palette_size = var->bits_per_pixel == 1 ?
4 : 1 << var->bits_per_pixel;
- if ((fbi->lccr4 & LCCR4_PAL_FOR_MASK) == LCCR4_PAL_FOR_0)
- palette_mem_size = fbi->palette_size * sizeof(u16);
- else
- palette_mem_size = fbi->palette_size * sizeof(u32);
-
- fbi->palette_cpu = (u16 *)(fbi->map_cpu + PAGE_SIZE - palette_mem_size);
- fbi->palette_dma = fbi->map_dma + PAGE_SIZE - palette_mem_size;
+ fbi->palette_cpu = (u16 *)&fbi->dma_buff->palette[0];
/*
* Set (any) board control register to handle new color depth
@@ -546,6 +539,48 @@
}
EXPORT_SYMBOL(pxafb_get_hsync_time);
+static int setup_frame_dma(struct pxafb_info *fbi, int dma, int pal,
+ unsigned int offset, size_t size)
+{
+ struct pxafb_dma_descriptor *dma_desc, *pal_desc;
+ unsigned int dma_desc_off, pal_desc_off;
+
+ if (dma < 0 || dma >= DMA_MAX)
+ return -EINVAL;
+
+ dma_desc = &fbi->dma_buff->dma_desc[dma];
+ dma_desc_off = offsetof(struct pxafb_dma_buff, dma_desc[dma]);
+
+ dma_desc->fsadr = fbi->screen_dma + offset;
+ dma_desc->fidr = 0;
+ dma_desc->ldcmd = size;
+
+ if (pal < 0 || pal >= PAL_MAX) {
+ dma_desc->fdadr = fbi->dma_buff_phys + dma_desc_off;
+ fbi->fdadr[dma] = fbi->dma_buff_phys + dma_desc_off;
+ } else {
+ pal_desc = &fbi->dma_buff->pal_desc[dma];
+ pal_desc_off = offsetof(struct pxafb_dma_buff, dma_desc[pal]);
+
+ pal_desc->fsadr = fbi->dma_buff_phys + pal * PALETTE_SIZE;
+ pal_desc->fidr = 0;
+
+ if ((fbi->lccr4 & LCCR4_PAL_FOR_MASK) == LCCR4_PAL_FOR_0)
+ pal_desc->ldcmd = fbi->palette_size * sizeof(u16);
+ else
+ pal_desc->ldcmd = fbi->palette_size * sizeof(u32);
+
+ pal_desc->ldcmd |= LDCMD_PAL;
+
+ /* flip back and forth between palette and frame buffer */
+ pal_desc->fdadr = fbi->dma_buff_phys + dma_desc_off;
+ dma_desc->fdadr = fbi->dma_buff_phys + pal_desc_off;
+ fbi->fdadr[dma] = fbi->dma_buff_phys + dma_desc_off;
+ }
+
+ return 0;
+}
+
/*
* pxafb_activate_var():
* Configures LCD Controller based on entries in var parameter.
@@ -557,6 +592,7 @@
struct pxafb_lcd_reg new_regs;
u_long flags;
u_int lines_per_panel, pcd = get_pcd(fbi, var->pixclock);
+ size_t nbytes;
#if DEBUG_VAR
if (var->xres < 16 || var->xres > 1024)
@@ -634,54 +670,15 @@
/* Update shadow copy atomically */
local_irq_save(flags);
- /* setup dma descriptors */
- fbi->dmadesc_fblow_cpu = (struct pxafb_dma_descriptor *)
- ((unsigned int)fbi->palette_cpu - 3*16);
- fbi->dmadesc_fbhigh_cpu = (struct pxafb_dma_descriptor *)
- ((unsigned int)fbi->palette_cpu - 2*16);
- fbi->dmadesc_palette_cpu = (struct pxafb_dma_descriptor *)
- ((unsigned int)fbi->palette_cpu - 1*16);
+ nbytes = lines_per_panel * fbi->fb.fix.line_length;
- fbi->dmadesc_fblow_dma = fbi->palette_dma - 3*16;
- fbi->dmadesc_fbhigh_dma = fbi->palette_dma - 2*16;
- fbi->dmadesc_palette_dma = fbi->palette_dma - 1*16;
+ if ((fbi->lccr0 & LCCR0_SDS) == LCCR0_Dual)
+ setup_frame_dma(fbi, DMA_LOWER, PAL_NONE, nbytes, nbytes);
-#define BYTES_PER_PANEL (lines_per_panel * fbi->fb.fix.line_length)
-
- /* populate descriptors */
- fbi->dmadesc_fblow_cpu->fdadr = fbi->dmadesc_fblow_dma;
- fbi->dmadesc_fblow_cpu->fsadr = fbi->screen_dma + BYTES_PER_PANEL;
- fbi->dmadesc_fblow_cpu->fidr = 0;
- fbi->dmadesc_fblow_cpu->ldcmd = BYTES_PER_PANEL;
-
- fbi->fdadr1 = fbi->dmadesc_fblow_dma; /* only used in dual-panel mode */
-
- fbi->dmadesc_fbhigh_cpu->fsadr = fbi->screen_dma;
- fbi->dmadesc_fbhigh_cpu->fidr = 0;
- fbi->dmadesc_fbhigh_cpu->ldcmd = BYTES_PER_PANEL;
-
- fbi->dmadesc_palette_cpu->fsadr = fbi->palette_dma;
- fbi->dmadesc_palette_cpu->fidr = 0;
- if ((fbi->lccr4 & LCCR4_PAL_FOR_MASK) == LCCR4_PAL_FOR_0)
- fbi->dmadesc_palette_cpu->ldcmd = fbi->palette_size *
- sizeof(u16);
+ if (var->bits_per_pixel >= 16)
+ setup_frame_dma(fbi, DMA_BASE, PAL_NONE, 0, nbytes);
else
- fbi->dmadesc_palette_cpu->ldcmd = fbi->palette_size *
- sizeof(u32);
- fbi->dmadesc_palette_cpu->ldcmd |= LDCMD_PAL;
-
- 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 */
- /* init it to something, even though we won't be using it */
- fbi->dmadesc_palette_cpu->fdadr = fbi->dmadesc_palette_dma;
- } else {
- /* flips back and forth between pal and fbhigh */
- fbi->dmadesc_palette_cpu->fdadr = fbi->dmadesc_fbhigh_dma;
- fbi->dmadesc_fbhigh_cpu->fdadr = fbi->dmadesc_palette_dma;
- fbi->fdadr0 = fbi->dmadesc_palette_dma;
- }
+ setup_frame_dma(fbi, DMA_BASE, PAL_BASE, 0, nbytes);
fbi->reg_lccr0 = new_regs.lccr0;
fbi->reg_lccr1 = new_regs.lccr1;
@@ -701,8 +698,8 @@
(__raw_readl(fbi->mmio_base + LCCR1) != fbi->reg_lccr1) ||
(__raw_readl(fbi->mmio_base + LCCR2) != fbi->reg_lccr2) ||
(__raw_readl(fbi->mmio_base + LCCR3) != fbi->reg_lccr3) ||
- (__raw_readl(fbi->mmio_base + FDADR0) != fbi->fdadr0) ||
- (__raw_readl(fbi->mmio_base + FDADR1) != fbi->fdadr1))
+ (__raw_readl(fbi->mmio_base + FDADR0) != fbi->fdadr[0]) ||
+ (__raw_readl(fbi->mmio_base + FDADR1) != fbi->fdadr[1]))
pxafb_schedule_work(fbi, C_REENABLE);
return 0;
@@ -777,8 +774,8 @@
static void pxafb_enable_controller(struct pxafb_info *fbi)
{
pr_debug("pxafb: Enabling LCD controller\n");
- pr_debug("fdadr0 0x%08x\n", (unsigned int) fbi->fdadr0);
- pr_debug("fdadr1 0x%08x\n", (unsigned int) fbi->fdadr1);
+ pr_debug("fdadr0 0x%08x\n", (unsigned int) fbi->fdadr[0]);
+ pr_debug("fdadr1 0x%08x\n", (unsigned int) fbi->fdadr[1]);
pr_debug("reg_lccr0 0x%08x\n", (unsigned int) fbi->reg_lccr0);
pr_debug("reg_lccr1 0x%08x\n", (unsigned int) fbi->reg_lccr1);
pr_debug("reg_lccr2 0x%08x\n", (unsigned int) fbi->reg_lccr2);
@@ -793,8 +790,8 @@
__raw_writel(fbi->reg_lccr1, fbi->mmio_base + LCCR1);
__raw_writel(fbi->reg_lccr0 & ~LCCR0_ENB, fbi->mmio_base + LCCR0);
- __raw_writel(fbi->fdadr0, fbi->mmio_base + FDADR0);
- __raw_writel(fbi->fdadr1, fbi->mmio_base + FDADR1);
+ __raw_writel(fbi->fdadr[0], fbi->mmio_base + FDADR0);
+ __raw_writel(fbi->fdadr[1], fbi->mmio_base + FDADR1);
__raw_writel(fbi->reg_lccr0 | LCCR0_ENB, fbi->mmio_base + LCCR0);
}
@@ -1038,8 +1035,6 @@
*/
static int __init pxafb_map_video_memory(struct pxafb_info *fbi)
{
- u_long palette_mem_size;
-
/*
* We reserve one page for the palette, plus the size
* of the framebuffer.
@@ -1062,14 +1057,9 @@
fbi->fb.fix.smem_start = fbi->screen_dma;
fbi->palette_size = fbi->fb.var.bits_per_pixel == 8 ? 256 : 16;
- if ((fbi->lccr4 & LCCR4_PAL_FOR_MASK) == LCCR4_PAL_FOR_0)
- palette_mem_size = fbi->palette_size * sizeof(u16);
- else
- palette_mem_size = fbi->palette_size * sizeof(u32);
-
- fbi->palette_cpu = (u16 *)(fbi->map_cpu + PAGE_SIZE
- - palette_mem_size);
- fbi->palette_dma = fbi->map_dma + PAGE_SIZE - palette_mem_size;
+ fbi->dma_buff = (void *)fbi->map_cpu;
+ fbi->dma_buff_phys = fbi->map_dma;
+ fbi->palette_cpu = (u16 *)&fbi->dma_buff->palette[0];
}
return fbi->map_cpu ? 0 : -ENOMEM;