diff options
Diffstat (limited to 'drivers/video/fbdev/kyro/STG4000OverlayDevice.c')
| -rw-r--r-- | drivers/video/fbdev/kyro/STG4000OverlayDevice.c | 600 |
1 files changed, 600 insertions, 0 deletions
diff --git a/drivers/video/fbdev/kyro/STG4000OverlayDevice.c b/drivers/video/fbdev/kyro/STG4000OverlayDevice.c new file mode 100644 index 000000000..9fde0e3b6 --- /dev/null +++ b/drivers/video/fbdev/kyro/STG4000OverlayDevice.c @@ -0,0 +1,600 @@ +/* + * linux/drivers/video/kyro/STG4000OverlayDevice.c + * + * Copyright (C) 2000 Imagination Technologies Ltd + * Copyright (C) 2002 STMicroelectronics + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/types.h> + +#include "STG4000Reg.h" +#include "STG4000Interface.h" + +/* HW Defines */ + +#define STG4000_NO_SCALING 0x800 +#define STG4000_NO_DECIMATION 0xFFFFFFFF + +/* Primary surface */ +#define STG4000_PRIM_NUM_PIX 5 +#define STG4000_PRIM_ALIGN 4 +#define STG4000_PRIM_ADDR_BITS 20 + +#define STG4000_PRIM_MIN_WIDTH 640 +#define STG4000_PRIM_MAX_WIDTH 1600 +#define STG4000_PRIM_MIN_HEIGHT 480 +#define STG4000_PRIM_MAX_HEIGHT 1200 + +/* Overlay surface */ +#define STG4000_OVRL_NUM_PIX 4 +#define STG4000_OVRL_ALIGN 2 +#define STG4000_OVRL_ADDR_BITS 20 +#define STG4000_OVRL_NUM_MODES 5 + +#define STG4000_OVRL_MIN_WIDTH 0 +#define STG4000_OVRL_MAX_WIDTH 720 +#define STG4000_OVRL_MIN_HEIGHT 0 +#define STG4000_OVRL_MAX_HEIGHT 576 + +/* Decimation and Scaling */ +static u32 adwDecim8[33] = { + 0xffffffff, 0xfffeffff, 0xffdffbff, 0xfefefeff, 0xfdf7efbf, + 0xfbdf7bdf, 0xf7bbddef, 0xeeeeeeef, 0xeeddbb77, 0xedb76db7, + 0xdb6db6db, 0xdb5b5b5b, 0xdab5ad6b, 0xd5ab55ab, 0xd555aaab, + 0xaaaaaaab, 0xaaaa5555, 0xaa952a55, 0xa94a5295, 0xa5252525, + 0xa4924925, 0x92491249, 0x91224489, 0x91111111, 0x90884211, + 0x88410821, 0x88102041, 0x81010101, 0x80800801, 0x80010001, + 0x80000001, 0x00000001, 0x00000000 +}; + +typedef struct _OVRL_SRC_DEST { + /*clipped on-screen pixel position of overlay */ + u32 ulDstX1; + u32 ulDstY1; + u32 ulDstX2; + u32 ulDstY2; + + /*clipped pixel pos of source data within buffer thses need to be 128 bit word aligned */ + u32 ulSrcX1; + u32 ulSrcY1; + u32 ulSrcX2; + u32 ulSrcY2; + + /* on-screen pixel position of overlay */ + s32 lDstX1; + s32 lDstY1; + s32 lDstX2; + s32 lDstY2; +} OVRL_SRC_DEST; + +static u32 ovlWidth, ovlHeight, ovlStride; +static int ovlLinear; + +void ResetOverlayRegisters(volatile STG4000REG __iomem *pSTGReg) +{ + u32 tmp; + + /* Set Overlay address to default */ + tmp = STG_READ_REG(DACOverlayAddr); + CLEAR_BITS_FRM_TO(0, 20); + CLEAR_BIT(31); + STG_WRITE_REG(DACOverlayAddr, tmp); + + /* Set Overlay U address */ + tmp = STG_READ_REG(DACOverlayUAddr); + CLEAR_BITS_FRM_TO(0, 20); + STG_WRITE_REG(DACOverlayUAddr, tmp); + + /* Set Overlay V address */ + tmp = STG_READ_REG(DACOverlayVAddr); + CLEAR_BITS_FRM_TO(0, 20); + STG_WRITE_REG(DACOverlayVAddr, tmp); + + /* Set Overlay Size */ + tmp = STG_READ_REG(DACOverlaySize); + CLEAR_BITS_FRM_TO(0, 10); + CLEAR_BITS_FRM_TO(12, 31); + STG_WRITE_REG(DACOverlaySize, tmp); + + /* Set Overlay Vt Decimation */ + tmp = STG4000_NO_DECIMATION; + STG_WRITE_REG(DACOverlayVtDec, tmp); + + /* Set Overlay format to default value */ + tmp = STG_READ_REG(DACPixelFormat); + CLEAR_BITS_FRM_TO(4, 7); + CLEAR_BITS_FRM_TO(16, 22); + STG_WRITE_REG(DACPixelFormat, tmp); + + /* Set Vertical scaling to default */ + tmp = STG_READ_REG(DACVerticalScal); + CLEAR_BITS_FRM_TO(0, 11); + CLEAR_BITS_FRM_TO(16, 22); + tmp |= STG4000_NO_SCALING; /* Set to no scaling */ + STG_WRITE_REG(DACVerticalScal, tmp); + + /* Set Horizontal Scaling to default */ + tmp = STG_READ_REG(DACHorizontalScal); + CLEAR_BITS_FRM_TO(0, 11); + CLEAR_BITS_FRM_TO(16, 17); + tmp |= STG4000_NO_SCALING; /* Set to no scaling */ + STG_WRITE_REG(DACHorizontalScal, tmp); + + /* Set Blend mode to Alpha Blend */ + /* ????? SG 08/11/2001 Surely this isn't the alpha blend mode, + hopefully its overwrite + */ + tmp = STG_READ_REG(DACBlendCtrl); + CLEAR_BITS_FRM_TO(0, 30); + tmp = (GRAPHICS_MODE << 28); + STG_WRITE_REG(DACBlendCtrl, tmp); + +} + +int CreateOverlaySurface(volatile STG4000REG __iomem *pSTGReg, + u32 inWidth, + u32 inHeight, + int bLinear, + u32 ulOverlayOffset, + u32 * retStride, u32 * retUVStride) +{ + u32 tmp; + u32 ulStride; + + if (inWidth > STG4000_OVRL_MAX_WIDTH || + inHeight > STG4000_OVRL_MAX_HEIGHT) { + return -EINVAL; + } + + /* Stride in 16 byte words - 16Bpp */ + if (bLinear) { + /* Format is 16bits so num 16 byte words is width/8 */ + if ((inWidth & 0x7) == 0) { /* inWidth % 8 */ + ulStride = (inWidth / 8); + } else { + /* Round up to next 16byte boundary */ + ulStride = ((inWidth + 8) / 8); + } + } else { + /* Y component is 8bits so num 16 byte words is width/16 */ + if ((inWidth & 0xf) == 0) { /* inWidth % 16 */ + ulStride = (inWidth / 16); + } else { + /* Round up to next 16byte boundary */ + ulStride = ((inWidth + 16) / 16); + } + } + + + /* Set Overlay address and Format mode */ + tmp = STG_READ_REG(DACOverlayAddr); + CLEAR_BITS_FRM_TO(0, 20); + if (bLinear) { + CLEAR_BIT(31); /* Overlay format to Linear */ + } else { + tmp |= SET_BIT(31); /* Overlay format to Planer */ + } + + /* Only bits 24:4 of the Overlay address */ + tmp |= (ulOverlayOffset >> 4); + STG_WRITE_REG(DACOverlayAddr, tmp); + + if (!bLinear) { + u32 uvSize = + (inWidth & 0x1) ? (inWidth + 1 / 2) : (inWidth / 2); + u32 uvStride; + u32 ulOffset; + /* Y component is 8bits so num 32 byte words is width/32 */ + if ((uvSize & 0xf) == 0) { /* inWidth % 16 */ + uvStride = (uvSize / 16); + } else { + /* Round up to next 32byte boundary */ + uvStride = ((uvSize + 16) / 16); + } + + ulOffset = ulOverlayOffset + (inHeight * (ulStride * 16)); + /* Align U,V data to 32byte boundary */ + if ((ulOffset & 0x1f) != 0) + ulOffset = (ulOffset + 32L) & 0xffffffE0L; + + tmp = STG_READ_REG(DACOverlayUAddr); + CLEAR_BITS_FRM_TO(0, 20); + tmp |= (ulOffset >> 4); + STG_WRITE_REG(DACOverlayUAddr, tmp); + + ulOffset += (inHeight / 2) * (uvStride * 16); + /* Align U,V data to 32byte boundary */ + if ((ulOffset & 0x1f) != 0) + ulOffset = (ulOffset + 32L) & 0xffffffE0L; + + tmp = STG_READ_REG(DACOverlayVAddr); + CLEAR_BITS_FRM_TO(0, 20); + tmp |= (ulOffset >> 4); + STG_WRITE_REG(DACOverlayVAddr, tmp); + + *retUVStride = uvStride * 16; + } + + + /* Set Overlay YUV pixel format + * Make sure that LUT not used - ?????? + */ + tmp = STG_READ_REG(DACPixelFormat); + /* Only support Planer or UYVY linear formats */ + CLEAR_BITS_FRM_TO(4, 9); + STG_WRITE_REG(DACPixelFormat, tmp); + + ovlWidth = inWidth; + ovlHeight = inHeight; + ovlStride = ulStride; + ovlLinear = bLinear; + *retStride = ulStride << 4; /* In bytes */ + + return 0; +} + +int SetOverlayBlendMode(volatile STG4000REG __iomem *pSTGReg, + OVRL_BLEND_MODE mode, + u32 ulAlpha, u32 ulColorKey) +{ + u32 tmp; + + tmp = STG_READ_REG(DACBlendCtrl); + CLEAR_BITS_FRM_TO(28, 30); + tmp |= (mode << 28); + + switch (mode) { + case COLOR_KEY: + CLEAR_BITS_FRM_TO(0, 23); + tmp |= (ulColorKey & 0x00FFFFFF); + break; + + case GLOBAL_ALPHA: + CLEAR_BITS_FRM_TO(24, 27); + tmp |= ((ulAlpha & 0xF) << 24); + break; + + case CK_PIXEL_ALPHA: + CLEAR_BITS_FRM_TO(0, 23); + tmp |= (ulColorKey & 0x00FFFFFF); + break; + + case CK_GLOBAL_ALPHA: + CLEAR_BITS_FRM_TO(0, 23); + tmp |= (ulColorKey & 0x00FFFFFF); + CLEAR_BITS_FRM_TO(24, 27); + tmp |= ((ulAlpha & 0xF) << 24); + break; + + case GRAPHICS_MODE: + case PER_PIXEL_ALPHA: + break; + + default: + return -EINVAL; + } + + STG_WRITE_REG(DACBlendCtrl, tmp); + + return 0; +} + +void EnableOverlayPlane(volatile STG4000REG __iomem *pSTGReg) +{ + u32 tmp; + /* Enable Overlay */ + tmp = STG_READ_REG(DACPixelFormat); + tmp |= SET_BIT(7); + STG_WRITE_REG(DACPixelFormat, tmp); + + /* Set video stream control */ + tmp = STG_READ_REG(DACStreamCtrl); + tmp |= SET_BIT(1); /* video stream */ + STG_WRITE_REG(DACStreamCtrl, tmp); +} + +static u32 Overlap(u32 ulBits, u32 ulPattern) +{ + u32 ulCount = 0; + + while (ulBits) { + if (!(ulPattern & 1)) + ulCount++; + ulBits--; + ulPattern = ulPattern >> 1; + } + + return ulCount; + +} + +int SetOverlayViewPort(volatile STG4000REG __iomem *pSTGReg, + u32 left, u32 top, + u32 right, u32 bottom) +{ + OVRL_SRC_DEST srcDest; + + u32 ulSrcTop, ulSrcBottom; + u32 ulSrc, ulDest; + u32 ulFxScale, ulFxOffset; + u32 ulHeight, ulWidth; + u32 ulPattern; + u32 ulDecimate, ulDecimated; + u32 ulApplied; + u32 ulDacXScale, ulDacYScale; + u32 ulScale; + u32 ulLeft, ulRight; + u32 ulSrcLeft, ulSrcRight; + u32 ulScaleLeft; + u32 ulhDecim; + u32 ulsVal; + u32 ulVertDecFactor; + int bResult; + u32 ulClipOff = 0; + u32 ulBits = 0; + u32 ulsAdd = 0; + u32 tmp, ulStride; + u32 ulExcessPixels, ulClip, ulExtraLines; + + + srcDest.ulSrcX1 = 0; + srcDest.ulSrcY1 = 0; + srcDest.ulSrcX2 = ovlWidth - 1; + srcDest.ulSrcY2 = ovlHeight - 1; + + srcDest.ulDstX1 = left; + srcDest.ulDstY1 = top; + srcDest.ulDstX2 = right; + srcDest.ulDstY2 = bottom; + + srcDest.lDstX1 = srcDest.ulDstX1; + srcDest.lDstY1 = srcDest.ulDstY1; + srcDest.lDstX2 = srcDest.ulDstX2; + srcDest.lDstY2 = srcDest.ulDstY2; + + /************* Vertical decimation/scaling ******************/ + + /* Get Src Top and Bottom */ + ulSrcTop = srcDest.ulSrcY1; + ulSrcBottom = srcDest.ulSrcY2; + + ulSrc = ulSrcBottom - ulSrcTop; + ulDest = srcDest.lDstY2 - srcDest.lDstY1; /* on-screen overlay */ + + if (ulSrc <= 1) + return -EINVAL; + + /* First work out the position we are to display as offset from the + * source of the buffer + */ + ulFxScale = (ulDest << 11) / ulSrc; /* fixed point scale factor */ + ulFxOffset = (srcDest.lDstY2 - srcDest.ulDstY2) << 11; + + ulSrcBottom = ulSrcBottom - (ulFxOffset / ulFxScale); + ulSrc = ulSrcBottom - ulSrcTop; + ulHeight = ulSrc; + + ulDest = srcDest.ulDstY2 - (srcDest.ulDstY1 - 1); + ulPattern = adwDecim8[ulBits]; + + /* At this point ulSrc represents the input decimator */ + if (ulSrc > ulDest) { + ulDecimate = ulSrc - ulDest; + ulBits = 0; + ulApplied = ulSrc / 32; + + while (((ulBits * ulApplied) + + Overlap((ulSrc % 32), + adwDecim8[ulBits])) < ulDecimate) + ulBits++; + + ulPattern = adwDecim8[ulBits]; + ulDecimated = + (ulBits * ulApplied) + Overlap((ulSrc % 32), + ulPattern); + ulSrc = ulSrc - ulDecimated; /* the number number of lines that will go into the scaler */ + } + + if (ulBits && (ulBits != 32)) { + ulVertDecFactor = (63 - ulBits) / (32 - ulBits); /* vertical decimation factor scaled up to nearest integer */ + } else { + ulVertDecFactor = 1; + } + + ulDacYScale = ((ulSrc - 1) * 2048) / (ulDest + 1); + + tmp = STG_READ_REG(DACOverlayVtDec); /* Decimation */ + CLEAR_BITS_FRM_TO(0, 31); + tmp = ulPattern; + STG_WRITE_REG(DACOverlayVtDec, tmp); + + /***************** Horizontal decimation/scaling ***************************/ + + /* + * Now we handle the horizontal case, this is a simplified version of + * the vertical case in that we decimate by factors of 2. as we are + * working in words we should always be able to decimate by these + * factors. as we always have to have a buffer which is aligned to a + * whole number of 128 bit words, we must align the left side to the + * lowest to the next lowest 128 bit boundary, and the right hand edge + * to the next largets boundary, (in a similar way to how we didi it in + * PMX1) as the left and right hand edges are aligned to these + * boundaries normally this only becomes an issue when we are chopping + * of one of the sides We shall work out vertical stuff first + */ + ulSrc = srcDest.ulSrcX2 - srcDest.ulSrcX1; + ulDest = srcDest.lDstX2 - srcDest.lDstX1; +#ifdef _OLDCODE + ulLeft = srcDest.ulDstX1; + ulRight = srcDest.ulDstX2; +#else + if (srcDest.ulDstX1 > 2) { + ulLeft = srcDest.ulDstX1 + 2; + ulRight = srcDest.ulDstX2 + 1; + } else { + ulLeft = srcDest.ulDstX1; + ulRight = srcDest.ulDstX2 + 1; + } +#endif + /* first work out the position we are to display as offset from the source of the buffer */ + bResult = 1; + + do { + if (ulDest == 0) + return -EINVAL; + + /* source pixels per dest pixel <<11 */ + ulFxScale = ((ulSrc - 1) << 11) / (ulDest); + + /* then number of destination pixels out we are */ + ulFxOffset = ulFxScale * ((srcDest.ulDstX1 - srcDest.lDstX1) + ulClipOff); + ulFxOffset >>= 11; + + /* this replaces the code which was making a decision as to use either ulFxOffset or ulSrcX1 */ + ulSrcLeft = srcDest.ulSrcX1 + ulFxOffset; + + /* then number of destination pixels out we are */ + ulFxOffset = ulFxScale * (srcDest.lDstX2 - srcDest.ulDstX2); + ulFxOffset >>= 11; + + ulSrcRight = srcDest.ulSrcX2 - ulFxOffset; + + /* + * we must align these to our 128 bit boundaries. we shall + * round down the pixel pos to the nearest 8 pixels. + */ + ulScaleLeft = ulSrcLeft; + + /* shift fxscale until it is in the range of the scaler */ + ulhDecim = 0; + ulScale = (((ulSrcRight - ulSrcLeft) - 1) << (11 - ulhDecim)) / (ulRight - ulLeft + 2); + + while (ulScale > 0x800) { + ulhDecim++; + ulScale = (((ulSrcRight - ulSrcLeft) - 1) << (11 - ulhDecim)) / (ulRight - ulLeft + 2); + } + + /* + * to try and get the best values We first try and use + * src/dwdest for the scale factor, then we move onto src-1 + * + * we want to check to see if we will need to clip data, if so + * then we should clip our source so that we don't need to + */ + if (!ovlLinear) { + ulSrcLeft &= ~0x1f; + + /* + * we must align the right hand edge to the next 32 + * pixel` boundary, must be on a 256 boundary so u, and + * v are 128 bit aligned + */ + ulSrcRight = (ulSrcRight + 0x1f) & ~0x1f; + } else { + ulSrcLeft &= ~0x7; + + /* + * we must align the right hand edge to the next + * 8pixel` boundary + */ + ulSrcRight = (ulSrcRight + 0x7) & ~0x7; + } + + /* this is the input size line store needs to cope with */ + ulWidth = ulSrcRight - ulSrcLeft; + + /* + * use unclipped value to work out scale factror this is the + * scale factor we want we shall now work out the horizonal + * decimation and scaling + */ + ulsVal = ((ulWidth / 8) >> ulhDecim); + + if ((ulWidth != (ulsVal << ulhDecim) * 8)) + ulsAdd = 1; + + /* input pixels to scaler; */ + ulSrc = ulWidth >> ulhDecim; + + if (ulSrc <= 2) + return -EINVAL; + + ulExcessPixels = ((((ulScaleLeft - ulSrcLeft)) << (11 - ulhDecim)) / ulScale); + + ulClip = (ulSrc << 11) / ulScale; + ulClip -= (ulRight - ulLeft); + ulClip += ulExcessPixels; + + if (ulClip) + ulClip--; + + /* We may need to do more here if we really have a HW rev < 5 */ + } while (!bResult); + + ulExtraLines = (1 << ulhDecim) * ulVertDecFactor; + ulExtraLines += 64; + ulHeight += ulExtraLines; + + ulDacXScale = ulScale; + + + tmp = STG_READ_REG(DACVerticalScal); + CLEAR_BITS_FRM_TO(0, 11); + CLEAR_BITS_FRM_TO(16, 22); /* Vertical Scaling */ + + /* Calculate new output line stride, this is always the number of 422 + words in the line buffer, so it doesn't matter if the + mode is 420. Then set the vertical scale register. + */ + 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; +} |