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authorEric Miao <ycmiao@ycmiao-hp520.(none)>2008-12-23 17:49:43 +0800
committerEric Miao <eric.miao@marvell.com>2008-12-29 18:00:04 +0800
commit198fc108ee4c2cd3f08954eae6a819c81c03214b (patch)
tree153fdb793142ef5ee8e0ab6198dcde32866b062c /arch/arm
parent3f16ff608a75c8bf28c8cafed12e076d67a3602a (diff)
[ARM] pxafb: add support for overlay1 and overlay2 as framebuffer devices
PXA27x and later processors support overlay1 and overlay2 on-top of the base framebuffer (although under-neath the base is also possible). They support palette and no-palette RGB formats, as well as YUV formats (only available on overlay2). These overlays have dedicated DMA channels and behave in a similar way as a framebuffer. This heavily simplified and re-structured work is based on the original pxafb_overlay.c (which is pending for mainline merge for a long time). The major problems with this pxafb_overlay.c are (if you are interested in the history): 1. heavily redundant (the control logics for overlay1 and overlay2 are actually identical except for some small operations, which are now abstracted into a 'pxafb_layer_ops' structure) 2. a lot of useless and un-tested code (two workarounds which are now fixed on mature silicons) 3. cursorfb is actually useless, hardware cursor should not be used this way, and the code was actually un-tested for a long time. The code in this patch should be self-explanatory, I tried to add minimum comments. As said, this is basically simplified, there are several things still on the pending list: 1. palette mode is un-supported and un-tested (although re-using the palette code of the base framebuffer is actually very easy now with previous clean-up patches) 2. fb_pan_display for overlay(s) is un-supported 3. the base framebuffer can actually be abstracted by 'pxafb_layer' as well, which will help further re-use of the code and keep a better and consistent structure. (This is the reason I named it 'pxafb_layer' instead of 'pxafb_overlay' or something alike) See Documentation/fb/pxafb.txt for additional usage information. Signed-off-by: Eric Miao <eric.miao@marvell.com> Cc: Rodolfo Giometti <giometti@linux.it> Signed-off-by: Eric Miao <ycmiao@ycmiao-hp520.(none)>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mach-pxa/include/mach/regs-lcd.h34
1 files changed, 25 insertions, 9 deletions
diff --git a/arch/arm/mach-pxa/include/mach/regs-lcd.h b/arch/arm/mach-pxa/include/mach/regs-lcd.h
index aff3b876a7b..f82dcea792d 100644
--- a/arch/arm/mach-pxa/include/mach/regs-lcd.h
+++ b/arch/arm/mach-pxa/include/mach/regs-lcd.h
@@ -12,7 +12,8 @@
#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 LCSR (0x038) /* LCD Controller Status Register */
+#define LCSR (0x038) /* LCD Controller Status Register 0 */
+#define LCSR1 (0x034) /* LCD Controller Status Register 1 */
#define LIIDR (0x03C) /* LCD Controller Interrupt ID Register */
#define TMEDRGBR (0x040) /* TMED RGB Seed Register */
#define TMEDCR (0x044) /* TMED Control Register */
@@ -25,6 +26,11 @@
#define FBR5 (0x110) /* DMA Channel 2 Frame Branch Register */
#define FBR6 (0x114) /* DMA Channel 2 Frame Branch Register */
+#define OVL1C1 (0x050) /* Overlay 1 Control Register 1 */
+#define OVL1C2 (0x060) /* Overlay 1 Control Register 2 */
+#define OVL2C1 (0x070) /* Overlay 2 Control Register 1 */
+#define OVL2C2 (0x080) /* Overlay 2 Control Register 2 */
+
#define CMDCR (0x100) /* Command Control Register */
#define PRSR (0x104) /* Panel Read Status Register */
@@ -42,16 +48,12 @@
#define LCCR4_PAL_FOR_MASK (3 << 15)
#define FDADR0 (0x200) /* DMA Channel 0 Frame Descriptor Address Register */
-#define FSADR0 (0x204) /* DMA Channel 0 Frame Source Address Register */
-#define FIDR0 (0x208) /* DMA Channel 0 Frame ID Register */
-#define LDCMD0 (0x20C) /* DMA Channel 0 Command Register */
#define FDADR1 (0x210) /* DMA Channel 1 Frame Descriptor Address Register */
-#define FSADR1 (0x214) /* DMA Channel 1 Frame Source Address Register */
-#define FIDR1 (0x218) /* DMA Channel 1 Frame ID Register */
-#define LDCMD1 (0x21C) /* DMA Channel 1 Command Register */
+#define FDADR2 (0x220) /* DMA Channel 2 Frame Descriptor Address Register */
+#define FDADR3 (0x230) /* DMA Channel 3 Frame Descriptor Address Register */
+#define FDADR4 (0x240) /* DMA Channel 4 Frame Descriptor Address Register */
+#define FDADR5 (0x250) /* DMA Channel 5 Frame Descriptor Address Register */
#define FDADR6 (0x260) /* DMA Channel 6 Frame Descriptor Address Register */
-#define FSADR6 (0x264) /* DMA Channel 6 Frame Source Address Register */
-#define FIDR6 (0x268) /* DMA Channel 6 Frame ID Register */
#define LCCR0_ENB (1 << 0) /* LCD Controller enable */
#define LCCR0_CMS (1 << 1) /* Color/Monochrome Display Select */
@@ -151,8 +153,22 @@
#define LCSR_RD_ST (1 << 11) /* read status */
#define LCSR_CMD_INT (1 << 12) /* command interrupt */
+#define LCSR1_IU(x) (1 << ((x) + 23)) /* Input FIFO underrun */
+#define LCSR1_BS(x) (1 << ((x) + 15)) /* Branch Status */
+#define LCSR1_EOF(x) (1 << ((x) + 7)) /* End of Frame Status */
+#define LCSR1_SOF(x) (1 << ((x) - 1)) /* Start of Frame Status */
+
#define LDCMD_PAL (1 << 26) /* instructs DMA to load palette buffer */
+/* overlay control registers */
+#define OVLxC1_PPL(x) ((((x) - 1) & 0x3ff) << 0) /* Pixels Per Line */
+#define OVLxC1_LPO(x) ((((x) - 1) & 0x3ff) << 10) /* Number of Lines */
+#define OVLxC1_BPP(x) (((x) & 0xf) << 20) /* Bits Per Pixel */
+#define OVLxC1_OEN (1 << 31) /* Enable bit for Overlay */
+#define OVLxC2_XPOS(x) (((x) & 0x3ff) << 0) /* Horizontal Position */
+#define OVLxC2_YPOS(x) (((x) & 0x3ff) << 10) /* Vertical Position */
+#define OVL2C2_PFOR(x) (((x) & 0x7) << 20) /* Pixel Format */
+
/* smartpanel related */
#define PRSR_DATA(x) ((x) & 0xff) /* Panel Data */
#define PRSR_A0 (1 << 8) /* Read Data Source */