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600 lines
15 KiB
600 lines
15 KiB
/* |
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* linux/drivers/video/kyro/STG4000OverlayDevice.c |
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* |
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* Copyright (C) 2000 Imagination Technologies Ltd |
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* Copyright (C) 2002 STMicroelectronics |
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* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file COPYING in the main directory of this archive |
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* for more details. |
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*/ |
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|
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#include <linux/kernel.h> |
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#include <linux/errno.h> |
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#include <linux/types.h> |
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|
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#include "STG4000Reg.h" |
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#include "STG4000Interface.h" |
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|
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/* HW Defines */ |
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|
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#define STG4000_NO_SCALING 0x800 |
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#define STG4000_NO_DECIMATION 0xFFFFFFFF |
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|
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/* Primary surface */ |
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#define STG4000_PRIM_NUM_PIX 5 |
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#define STG4000_PRIM_ALIGN 4 |
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#define STG4000_PRIM_ADDR_BITS 20 |
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|
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#define STG4000_PRIM_MIN_WIDTH 640 |
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#define STG4000_PRIM_MAX_WIDTH 1600 |
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#define STG4000_PRIM_MIN_HEIGHT 480 |
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#define STG4000_PRIM_MAX_HEIGHT 1200 |
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|
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/* Overlay surface */ |
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#define STG4000_OVRL_NUM_PIX 4 |
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#define STG4000_OVRL_ALIGN 2 |
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#define STG4000_OVRL_ADDR_BITS 20 |
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#define STG4000_OVRL_NUM_MODES 5 |
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|
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#define STG4000_OVRL_MIN_WIDTH 0 |
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#define STG4000_OVRL_MAX_WIDTH 720 |
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#define STG4000_OVRL_MIN_HEIGHT 0 |
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#define STG4000_OVRL_MAX_HEIGHT 576 |
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|
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/* Decimation and Scaling */ |
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static u32 adwDecim8[33] = { |
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0xffffffff, 0xfffeffff, 0xffdffbff, 0xfefefeff, 0xfdf7efbf, |
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0xfbdf7bdf, 0xf7bbddef, 0xeeeeeeef, 0xeeddbb77, 0xedb76db7, |
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0xdb6db6db, 0xdb5b5b5b, 0xdab5ad6b, 0xd5ab55ab, 0xd555aaab, |
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0xaaaaaaab, 0xaaaa5555, 0xaa952a55, 0xa94a5295, 0xa5252525, |
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0xa4924925, 0x92491249, 0x91224489, 0x91111111, 0x90884211, |
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0x88410821, 0x88102041, 0x81010101, 0x80800801, 0x80010001, |
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0x80000001, 0x00000001, 0x00000000 |
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}; |
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typedef struct _OVRL_SRC_DEST { |
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/*clipped on-screen pixel position of overlay */ |
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u32 ulDstX1; |
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u32 ulDstY1; |
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u32 ulDstX2; |
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u32 ulDstY2; |
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|
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/*clipped pixel pos of source data within buffer thses need to be 128 bit word aligned */ |
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u32 ulSrcX1; |
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u32 ulSrcY1; |
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u32 ulSrcX2; |
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u32 ulSrcY2; |
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|
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/* on-screen pixel position of overlay */ |
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s32 lDstX1; |
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s32 lDstY1; |
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s32 lDstX2; |
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s32 lDstY2; |
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} OVRL_SRC_DEST; |
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|
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static u32 ovlWidth, ovlHeight, ovlStride; |
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static int ovlLinear; |
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|
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void ResetOverlayRegisters(volatile STG4000REG __iomem *pSTGReg) |
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{ |
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u32 tmp; |
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|
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/* Set Overlay address to default */ |
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tmp = STG_READ_REG(DACOverlayAddr); |
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CLEAR_BITS_FRM_TO(0, 20); |
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CLEAR_BIT(31); |
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STG_WRITE_REG(DACOverlayAddr, tmp); |
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|
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/* Set Overlay U address */ |
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tmp = STG_READ_REG(DACOverlayUAddr); |
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CLEAR_BITS_FRM_TO(0, 20); |
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STG_WRITE_REG(DACOverlayUAddr, tmp); |
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|
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/* Set Overlay V address */ |
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tmp = STG_READ_REG(DACOverlayVAddr); |
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CLEAR_BITS_FRM_TO(0, 20); |
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STG_WRITE_REG(DACOverlayVAddr, tmp); |
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|
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/* Set Overlay Size */ |
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tmp = STG_READ_REG(DACOverlaySize); |
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CLEAR_BITS_FRM_TO(0, 10); |
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CLEAR_BITS_FRM_TO(12, 31); |
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STG_WRITE_REG(DACOverlaySize, tmp); |
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|
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/* Set Overlay Vt Decimation */ |
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tmp = STG4000_NO_DECIMATION; |
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STG_WRITE_REG(DACOverlayVtDec, tmp); |
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|
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/* Set Overlay format to default value */ |
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tmp = STG_READ_REG(DACPixelFormat); |
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CLEAR_BITS_FRM_TO(4, 7); |
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CLEAR_BITS_FRM_TO(16, 22); |
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STG_WRITE_REG(DACPixelFormat, tmp); |
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|
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/* Set Vertical scaling to default */ |
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tmp = STG_READ_REG(DACVerticalScal); |
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CLEAR_BITS_FRM_TO(0, 11); |
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CLEAR_BITS_FRM_TO(16, 22); |
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tmp |= STG4000_NO_SCALING; /* Set to no scaling */ |
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STG_WRITE_REG(DACVerticalScal, tmp); |
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|
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/* Set Horizontal Scaling to default */ |
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tmp = STG_READ_REG(DACHorizontalScal); |
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CLEAR_BITS_FRM_TO(0, 11); |
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CLEAR_BITS_FRM_TO(16, 17); |
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tmp |= STG4000_NO_SCALING; /* Set to no scaling */ |
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STG_WRITE_REG(DACHorizontalScal, tmp); |
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|
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/* Set Blend mode to Alpha Blend */ |
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/* ????? SG 08/11/2001 Surely this isn't the alpha blend mode, |
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hopefully its overwrite |
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*/ |
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tmp = STG_READ_REG(DACBlendCtrl); |
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CLEAR_BITS_FRM_TO(0, 30); |
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tmp = (GRAPHICS_MODE << 28); |
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STG_WRITE_REG(DACBlendCtrl, tmp); |
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|
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} |
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int CreateOverlaySurface(volatile STG4000REG __iomem *pSTGReg, |
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u32 inWidth, |
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u32 inHeight, |
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int bLinear, |
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u32 ulOverlayOffset, |
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u32 * retStride, u32 * retUVStride) |
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{ |
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u32 tmp; |
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u32 ulStride; |
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if (inWidth > STG4000_OVRL_MAX_WIDTH || |
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inHeight > STG4000_OVRL_MAX_HEIGHT) { |
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return -EINVAL; |
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} |
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|
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/* Stride in 16 byte words - 16Bpp */ |
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if (bLinear) { |
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/* Format is 16bits so num 16 byte words is width/8 */ |
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if ((inWidth & 0x7) == 0) { /* inWidth % 8 */ |
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ulStride = (inWidth / 8); |
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} else { |
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/* Round up to next 16byte boundary */ |
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ulStride = ((inWidth + 8) / 8); |
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} |
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} else { |
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/* Y component is 8bits so num 16 byte words is width/16 */ |
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if ((inWidth & 0xf) == 0) { /* inWidth % 16 */ |
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ulStride = (inWidth / 16); |
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} else { |
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/* Round up to next 16byte boundary */ |
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ulStride = ((inWidth + 16) / 16); |
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} |
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} |
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/* Set Overlay address and Format mode */ |
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tmp = STG_READ_REG(DACOverlayAddr); |
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CLEAR_BITS_FRM_TO(0, 20); |
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if (bLinear) { |
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CLEAR_BIT(31); /* Overlay format to Linear */ |
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} else { |
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tmp |= SET_BIT(31); /* Overlay format to Planer */ |
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} |
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|
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/* Only bits 24:4 of the Overlay address */ |
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tmp |= (ulOverlayOffset >> 4); |
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STG_WRITE_REG(DACOverlayAddr, tmp); |
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|
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if (!bLinear) { |
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u32 uvSize = |
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(inWidth & 0x1) ? (inWidth + 1 / 2) : (inWidth / 2); |
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u32 uvStride; |
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u32 ulOffset; |
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/* Y component is 8bits so num 32 byte words is width/32 */ |
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if ((uvSize & 0xf) == 0) { /* inWidth % 16 */ |
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uvStride = (uvSize / 16); |
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} else { |
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/* Round up to next 32byte boundary */ |
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uvStride = ((uvSize + 16) / 16); |
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} |
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ulOffset = ulOverlayOffset + (inHeight * (ulStride * 16)); |
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/* Align U,V data to 32byte boundary */ |
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if ((ulOffset & 0x1f) != 0) |
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ulOffset = (ulOffset + 32L) & 0xffffffE0L; |
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tmp = STG_READ_REG(DACOverlayUAddr); |
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CLEAR_BITS_FRM_TO(0, 20); |
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tmp |= (ulOffset >> 4); |
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STG_WRITE_REG(DACOverlayUAddr, tmp); |
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ulOffset += (inHeight / 2) * (uvStride * 16); |
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/* Align U,V data to 32byte boundary */ |
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if ((ulOffset & 0x1f) != 0) |
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ulOffset = (ulOffset + 32L) & 0xffffffE0L; |
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tmp = STG_READ_REG(DACOverlayVAddr); |
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CLEAR_BITS_FRM_TO(0, 20); |
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tmp |= (ulOffset >> 4); |
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STG_WRITE_REG(DACOverlayVAddr, tmp); |
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*retUVStride = uvStride * 16; |
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} |
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/* Set Overlay YUV pixel format |
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* Make sure that LUT not used - ?????? |
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*/ |
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tmp = STG_READ_REG(DACPixelFormat); |
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/* Only support Planer or UYVY linear formats */ |
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CLEAR_BITS_FRM_TO(4, 9); |
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STG_WRITE_REG(DACPixelFormat, tmp); |
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ovlWidth = inWidth; |
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ovlHeight = inHeight; |
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ovlStride = ulStride; |
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ovlLinear = bLinear; |
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*retStride = ulStride << 4; /* In bytes */ |
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return 0; |
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} |
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int SetOverlayBlendMode(volatile STG4000REG __iomem *pSTGReg, |
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OVRL_BLEND_MODE mode, |
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u32 ulAlpha, u32 ulColorKey) |
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{ |
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u32 tmp; |
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tmp = STG_READ_REG(DACBlendCtrl); |
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CLEAR_BITS_FRM_TO(28, 30); |
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tmp |= (mode << 28); |
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switch (mode) { |
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case COLOR_KEY: |
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CLEAR_BITS_FRM_TO(0, 23); |
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tmp |= (ulColorKey & 0x00FFFFFF); |
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break; |
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case GLOBAL_ALPHA: |
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CLEAR_BITS_FRM_TO(24, 27); |
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tmp |= ((ulAlpha & 0xF) << 24); |
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break; |
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case CK_PIXEL_ALPHA: |
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CLEAR_BITS_FRM_TO(0, 23); |
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tmp |= (ulColorKey & 0x00FFFFFF); |
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break; |
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case CK_GLOBAL_ALPHA: |
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CLEAR_BITS_FRM_TO(0, 23); |
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tmp |= (ulColorKey & 0x00FFFFFF); |
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CLEAR_BITS_FRM_TO(24, 27); |
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tmp |= ((ulAlpha & 0xF) << 24); |
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break; |
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case GRAPHICS_MODE: |
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case PER_PIXEL_ALPHA: |
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break; |
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default: |
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return -EINVAL; |
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} |
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STG_WRITE_REG(DACBlendCtrl, tmp); |
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return 0; |
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} |
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void EnableOverlayPlane(volatile STG4000REG __iomem *pSTGReg) |
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{ |
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u32 tmp; |
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/* Enable Overlay */ |
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tmp = STG_READ_REG(DACPixelFormat); |
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tmp |= SET_BIT(7); |
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STG_WRITE_REG(DACPixelFormat, tmp); |
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|
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/* Set video stream control */ |
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tmp = STG_READ_REG(DACStreamCtrl); |
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tmp |= SET_BIT(1); /* video stream */ |
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STG_WRITE_REG(DACStreamCtrl, tmp); |
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} |
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static u32 Overlap(u32 ulBits, u32 ulPattern) |
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{ |
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u32 ulCount = 0; |
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while (ulBits) { |
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if (!(ulPattern & 1)) |
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ulCount++; |
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ulBits--; |
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ulPattern = ulPattern >> 1; |
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} |
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return ulCount; |
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} |
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int SetOverlayViewPort(volatile STG4000REG __iomem *pSTGReg, |
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u32 left, u32 top, |
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u32 right, u32 bottom) |
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{ |
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OVRL_SRC_DEST srcDest; |
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u32 ulSrcTop, ulSrcBottom; |
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u32 ulSrc, ulDest; |
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u32 ulFxScale, ulFxOffset; |
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u32 ulHeight, ulWidth; |
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u32 ulPattern; |
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u32 ulDecimate, ulDecimated; |
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u32 ulApplied; |
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u32 ulDacXScale, ulDacYScale; |
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u32 ulScale; |
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u32 ulLeft, ulRight; |
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u32 ulSrcLeft, ulSrcRight; |
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u32 ulScaleLeft; |
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u32 ulhDecim; |
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u32 ulsVal; |
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u32 ulVertDecFactor; |
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int bResult; |
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u32 ulClipOff = 0; |
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u32 ulBits = 0; |
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u32 ulsAdd = 0; |
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u32 tmp, ulStride; |
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u32 ulExcessPixels, ulClip, ulExtraLines; |
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srcDest.ulSrcX1 = 0; |
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srcDest.ulSrcY1 = 0; |
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srcDest.ulSrcX2 = ovlWidth - 1; |
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srcDest.ulSrcY2 = ovlHeight - 1; |
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srcDest.ulDstX1 = left; |
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srcDest.ulDstY1 = top; |
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srcDest.ulDstX2 = right; |
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srcDest.ulDstY2 = bottom; |
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srcDest.lDstX1 = srcDest.ulDstX1; |
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srcDest.lDstY1 = srcDest.ulDstY1; |
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srcDest.lDstX2 = srcDest.ulDstX2; |
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srcDest.lDstY2 = srcDest.ulDstY2; |
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|
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/************* Vertical decimation/scaling ******************/ |
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|
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/* Get Src Top and Bottom */ |
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ulSrcTop = srcDest.ulSrcY1; |
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ulSrcBottom = srcDest.ulSrcY2; |
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ulSrc = ulSrcBottom - ulSrcTop; |
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ulDest = srcDest.lDstY2 - srcDest.lDstY1; /* on-screen overlay */ |
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if (ulSrc <= 1) |
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return -EINVAL; |
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|
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/* First work out the position we are to display as offset from the |
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* source of the buffer |
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*/ |
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ulFxScale = (ulDest << 11) / ulSrc; /* fixed point scale factor */ |
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ulFxOffset = (srcDest.lDstY2 - srcDest.ulDstY2) << 11; |
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ulSrcBottom = ulSrcBottom - (ulFxOffset / ulFxScale); |
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ulSrc = ulSrcBottom - ulSrcTop; |
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ulHeight = ulSrc; |
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ulDest = srcDest.ulDstY2 - (srcDest.ulDstY1 - 1); |
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ulPattern = adwDecim8[ulBits]; |
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|
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/* At this point ulSrc represents the input decimator */ |
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if (ulSrc > ulDest) { |
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ulDecimate = ulSrc - ulDest; |
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ulBits = 0; |
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ulApplied = ulSrc / 32; |
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|
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while (((ulBits * ulApplied) + |
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Overlap((ulSrc % 32), |
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adwDecim8[ulBits])) < ulDecimate) |
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ulBits++; |
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ulPattern = adwDecim8[ulBits]; |
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ulDecimated = |
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(ulBits * ulApplied) + Overlap((ulSrc % 32), |
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ulPattern); |
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ulSrc = ulSrc - ulDecimated; /* the number number of lines that will go into the scaler */ |
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} |
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|
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if (ulBits && (ulBits != 32)) { |
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ulVertDecFactor = (63 - ulBits) / (32 - ulBits); /* vertical decimation factor scaled up to nearest integer */ |
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} else { |
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ulVertDecFactor = 1; |
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} |
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ulDacYScale = ((ulSrc - 1) * 2048) / (ulDest + 1); |
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tmp = STG_READ_REG(DACOverlayVtDec); /* Decimation */ |
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CLEAR_BITS_FRM_TO(0, 31); |
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tmp = ulPattern; |
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STG_WRITE_REG(DACOverlayVtDec, tmp); |
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|
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/***************** Horizontal decimation/scaling ***************************/ |
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/* |
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* Now we handle the horizontal case, this is a simplified version of |
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* the vertical case in that we decimate by factors of 2. as we are |
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* working in words we should always be able to decimate by these |
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* factors. as we always have to have a buffer which is aligned to a |
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* whole number of 128 bit words, we must align the left side to the |
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* lowest to the next lowest 128 bit boundary, and the right hand edge |
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* to the next largets boundary, (in a similar way to how we didi it in |
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* PMX1) as the left and right hand edges are aligned to these |
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* boundaries normally this only becomes an issue when we are chopping |
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* of one of the sides We shall work out vertical stuff first |
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*/ |
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ulSrc = srcDest.ulSrcX2 - srcDest.ulSrcX1; |
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ulDest = srcDest.lDstX2 - srcDest.lDstX1; |
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#ifdef _OLDCODE |
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ulLeft = srcDest.ulDstX1; |
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ulRight = srcDest.ulDstX2; |
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#else |
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if (srcDest.ulDstX1 > 2) { |
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ulLeft = srcDest.ulDstX1 + 2; |
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ulRight = srcDest.ulDstX2 + 1; |
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} else { |
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ulLeft = srcDest.ulDstX1; |
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ulRight = srcDest.ulDstX2 + 1; |
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} |
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#endif |
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/* first work out the position we are to display as offset from the source of the buffer */ |
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bResult = 1; |
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|
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do { |
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if (ulDest == 0) |
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return -EINVAL; |
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|
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/* source pixels per dest pixel <<11 */ |
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ulFxScale = ((ulSrc - 1) << 11) / (ulDest); |
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|
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/* then number of destination pixels out we are */ |
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ulFxOffset = ulFxScale * ((srcDest.ulDstX1 - srcDest.lDstX1) + ulClipOff); |
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ulFxOffset >>= 11; |
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|
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/* this replaces the code which was making a decision as to use either ulFxOffset or ulSrcX1 */ |
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ulSrcLeft = srcDest.ulSrcX1 + ulFxOffset; |
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|
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/* then number of destination pixels out we are */ |
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ulFxOffset = ulFxScale * (srcDest.lDstX2 - srcDest.ulDstX2); |
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ulFxOffset >>= 11; |
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|
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ulSrcRight = srcDest.ulSrcX2 - ulFxOffset; |
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|
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/* |
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* we must align these to our 128 bit boundaries. we shall |
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* round down the pixel pos to the nearest 8 pixels. |
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*/ |
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ulScaleLeft = ulSrcLeft; |
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|
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/* shift fxscale until it is in the range of the scaler */ |
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ulhDecim = 0; |
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ulScale = (((ulSrcRight - ulSrcLeft) - 1) << (11 - ulhDecim)) / (ulRight - ulLeft + 2); |
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|
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while (ulScale > 0x800) { |
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ulhDecim++; |
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ulScale = (((ulSrcRight - ulSrcLeft) - 1) << (11 - ulhDecim)) / (ulRight - ulLeft + 2); |
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} |
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|
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/* |
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* to try and get the best values We first try and use |
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* src/dwdest for the scale factor, then we move onto src-1 |
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* |
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* we want to check to see if we will need to clip data, if so |
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* then we should clip our source so that we don't need to |
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*/ |
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if (!ovlLinear) { |
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ulSrcLeft &= ~0x1f; |
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|
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/* |
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* we must align the right hand edge to the next 32 |
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* pixel` boundary, must be on a 256 boundary so u, and |
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* v are 128 bit aligned |
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*/ |
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ulSrcRight = (ulSrcRight + 0x1f) & ~0x1f; |
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} else { |
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ulSrcLeft &= ~0x7; |
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|
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/* |
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* we must align the right hand edge to the next |
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* 8pixel` boundary |
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*/ |
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ulSrcRight = (ulSrcRight + 0x7) & ~0x7; |
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} |
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|
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/* this is the input size line store needs to cope with */ |
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ulWidth = ulSrcRight - ulSrcLeft; |
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|
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/* |
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* use unclipped value to work out scale factror this is the |
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* scale factor we want we shall now work out the horizonal |
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* decimation and scaling |
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*/ |
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ulsVal = ((ulWidth / 8) >> ulhDecim); |
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|
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if ((ulWidth != (ulsVal << ulhDecim) * 8)) |
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ulsAdd = 1; |
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|
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/* input pixels to scaler; */ |
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ulSrc = ulWidth >> ulhDecim; |
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|
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if (ulSrc <= 2) |
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return -EINVAL; |
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|
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ulExcessPixels = ((((ulScaleLeft - ulSrcLeft)) << (11 - ulhDecim)) / ulScale); |
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|
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ulClip = (ulSrc << 11) / ulScale; |
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ulClip -= (ulRight - ulLeft); |
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ulClip += ulExcessPixels; |
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|
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if (ulClip) |
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ulClip--; |
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|
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/* We may need to do more here if we really have a HW rev < 5 */ |
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} while (!bResult); |
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|
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ulExtraLines = (1 << ulhDecim) * ulVertDecFactor; |
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ulExtraLines += 64; |
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ulHeight += ulExtraLines; |
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|
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ulDacXScale = ulScale; |
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|
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tmp = STG_READ_REG(DACVerticalScal); |
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CLEAR_BITS_FRM_TO(0, 11); |
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CLEAR_BITS_FRM_TO(16, 22); /* Vertical Scaling */ |
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|
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/* Calculate new output line stride, this is always the number of 422 |
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words in the line buffer, so it doesn't matter if the |
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mode is 420. Then set the vertical scale register. |
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*/ |
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ulStride = (ulWidth >> (ulhDecim + 3)) + ulsAdd; |
|
tmp |= ((ulStride << 16) | (ulDacYScale)); /* DAC_LS_CTRL = stride */ |
|
STG_WRITE_REG(DACVerticalScal, tmp); |
|
|
|
/* Now set up the overlay size using the modified width and height |
|
from decimate and scaling calculations |
|
*/ |
|
tmp = STG_READ_REG(DACOverlaySize); |
|
CLEAR_BITS_FRM_TO(0, 10); |
|
CLEAR_BITS_FRM_TO(12, 31); |
|
|
|
if (ovlLinear) { |
|
tmp |= |
|
(ovlStride | ((ulHeight + 1) << 12) | |
|
(((ulWidth / 8) - 1) << 23)); |
|
} else { |
|
tmp |= |
|
(ovlStride | ((ulHeight + 1) << 12) | |
|
(((ulWidth / 32) - 1) << 23)); |
|
} |
|
|
|
STG_WRITE_REG(DACOverlaySize, tmp); |
|
|
|
/* Set Video Window Start */ |
|
tmp = ((ulLeft << 16)) | (srcDest.ulDstY1); |
|
STG_WRITE_REG(DACVidWinStart, tmp); |
|
|
|
/* Set Video Window End */ |
|
tmp = ((ulRight) << 16) | (srcDest.ulDstY2); |
|
STG_WRITE_REG(DACVidWinEnd, tmp); |
|
|
|
/* Finally set up the rest of the overlay regs in the order |
|
done in the IMG driver |
|
*/ |
|
tmp = STG_READ_REG(DACPixelFormat); |
|
tmp = ((ulExcessPixels << 16) | tmp) & 0x7fffffff; |
|
STG_WRITE_REG(DACPixelFormat, tmp); |
|
|
|
tmp = STG_READ_REG(DACHorizontalScal); |
|
CLEAR_BITS_FRM_TO(0, 11); |
|
CLEAR_BITS_FRM_TO(16, 17); |
|
tmp |= ((ulhDecim << 16) | (ulDacXScale)); |
|
STG_WRITE_REG(DACHorizontalScal, tmp); |
|
|
|
return 0; |
|
}
|
|
|