drivers/staging/msm/mdp_ppp.c

/* drivers/video/msm/src/drv/mdp/mdp_ppp.c
 *
 * Copyright (C) 2007 Google Incorporated
 * Copyright (c) 2008-2010, Code Aurora Forum. All rights reserved.
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/time.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/fb.h>
#include <msm_mdp.h>
#include <linux/file.h>
#include <linux/major.h>

#include "linux/proc_fs.h"

#include <mach/hardware.h>
#include <linux/io.h>

#include <asm/system.h>
#include <asm/mach-types.h>
#include <linux/semaphore.h>

#include "mdp.h"
#include "msm_fb.h"

#define MDP_IS_IMGTYPE_BAD(x) (((x) >= MDP_IMGTYPE_LIMIT) && \
				(((x) < MDP_IMGTYPE2_START) || \
				 ((x) >= MDP_IMGTYPE_LIMIT2)))

static uint32_t bytes_per_pixel[] = {
	[MDP_RGB_565] = 2,
	[MDP_RGB_888] = 3,
	[MDP_XRGB_8888] = 4,
	[MDP_ARGB_8888] = 4,
	[MDP_RGBA_8888] = 4,
	[MDP_BGRA_8888] = 4,
	[MDP_Y_CBCR_H2V1] = 1,
	[MDP_Y_CBCR_H2V2] = 1,
	[MDP_Y_CRCB_H2V1] = 1,
	[MDP_Y_CRCB_H2V2] = 1,
	[MDP_YCRYCB_H2V1] = 2,
	[MDP_BGR_565] = 2
};

extern uint32 mdp_plv[];
extern struct semaphore mdp_ppp_mutex;

uint32_t mdp_get_bytes_per_pixel(uint32_t format)
{
	uint32_t bpp = 0;
	if (format < ARRAY_SIZE(bytes_per_pixel))
		bpp = bytes_per_pixel[format];

	BUG_ON(!bpp);
	return bpp;
}

static uint32 mdp_conv_matx_rgb2yuv(uint32 input_pixel,
				    uint16 *matrix_and_bias_vector,
				    uint32 *clamp_vector,
				    uint32 *look_up_table)
{
	uint8 input_C2, input_C0, input_C1;
	uint32 output;
	int32 comp_C2, comp_C1, comp_C0, temp;
	int32 temp1, temp2, temp3;
	int32 matrix[9];
	int32 bias_vector[3];
	int32 Y_low_limit, Y_high_limit, C_low_limit, C_high_limit;
	int32 i;
	uint32 _is_lookup_table_enabled;

	input_C2 = (input_pixel >> 16) & 0xFF;
	input_C1 = (input_pixel >> 8) & 0xFF;
	input_C0 = (input_pixel >> 0) & 0xFF;

	comp_C0 = input_C0;
	comp_C1 = input_C1;
	comp_C2 = input_C2;

	for (i = 0; i < 9; i++)
		matrix[i] =
		    ((int32) (((int32) matrix_and_bias_vector[i]) << 20)) >> 20;

	bias_vector[0] = (int32) (matrix_and_bias_vector[9] & 0xFF);
	bias_vector[1] = (int32) (matrix_and_bias_vector[10] & 0xFF);
	bias_vector[2] = (int32) (matrix_and_bias_vector[11] & 0xFF);

	Y_low_limit = (int32) clamp_vector[0];
	Y_high_limit = (int32) clamp_vector[1];
	C_low_limit = (int32) clamp_vector[2];
	C_high_limit = (int32) clamp_vector[3];

	if (look_up_table == 0)	/* check for NULL point */
		_is_lookup_table_enabled = 0;
	else
		_is_lookup_table_enabled = 1;

	if (_is_lookup_table_enabled == 1) {
		comp_C2 = (look_up_table[comp_C2] >> 16) & 0xFF;
		comp_C1 = (look_up_table[comp_C1] >> 8) & 0xFF;
		comp_C0 = (look_up_table[comp_C0] >> 0) & 0xFF;
	}
	/*
	 * Color Conversion
	 * reorder input colors
	 */
	temp = comp_C2;
	comp_C2 = comp_C1;
	comp_C1 = comp_C0;
	comp_C0 = temp;

	/* matrix multiplication */
	temp1 = comp_C0 * matrix[0] + comp_C1 * matrix[1] + comp_C2 * matrix[2];
	temp2 = comp_C0 * matrix[3] + comp_C1 * matrix[4] + comp_C2 * matrix[5];
	temp3 = comp_C0 * matrix[6] + comp_C1 * matrix[7] + comp_C2 * matrix[8];

	comp_C0 = temp1 + 0x100;
	comp_C1 = temp2 + 0x100;
	comp_C2 = temp3 + 0x100;

	/* take interger part */
	comp_C0 >>= 9;
	comp_C1 >>= 9;
	comp_C2 >>= 9;

	/* post bias (+) */
	comp_C0 += bias_vector[0];
	comp_C1 += bias_vector[1];
	comp_C2 += bias_vector[2];

	/* limit pixel to 8-bit */
	if (comp_C0 < 0)
		comp_C0 = 0;

	if (comp_C0 > 255)
		comp_C0 = 255;

	if (comp_C1 < 0)
		comp_C1 = 0;

	if (comp_C1 > 255)
		comp_C1 = 255;

	if (comp_C2 < 0)
		comp_C2 = 0;

	if (comp_C2 > 255)
		comp_C2 = 255;

	/* clamp */
	if (comp_C0 < Y_low_limit)
		comp_C0 = Y_low_limit;

	if (comp_C0 > Y_high_limit)
		comp_C0 = Y_high_limit;

	if (comp_C1 < C_low_limit)
		comp_C1 = C_low_limit;

	if (comp_C1 > C_high_limit)
		comp_C1 = C_high_limit;

	if (comp_C2 < C_low_limit)
		comp_C2 = C_low_limit;

	if (comp_C2 > C_high_limit)
		comp_C2 = C_high_limit;

	output = (comp_C2 << 16) | (comp_C1 << 8) | comp_C0;
	return output;
}

uint32 mdp_conv_matx_yuv2rgb(uint32 input_pixel,
			     uint16 *matrix_and_bias_vector,
			     uint32 *clamp_vector, uint32 *look_up_table)
{
	uint8 input_C2, input_C0, input_C1;
	uint32 output;
	int32 comp_C2, comp_C1, comp_C0, temp;
	int32 temp1, temp2, temp3;
	int32 matrix[9];
	int32 bias_vector[3];
	int32 Y_low_limit, Y_high_limit, C_low_limit, C_high_limit;
	int32 i;
	uint32 _is_lookup_table_enabled;

	input_C2 = (input_pixel >> 16) & 0xFF;
	input_C1 = (input_pixel >> 8) & 0xFF;
	input_C0 = (input_pixel >> 0) & 0xFF;

	comp_C0 = input_C0;
	comp_C1 = input_C1;
	comp_C2 = input_C2;

	for (i = 0; i < 9; i++)
		matrix[i] =
		    ((int32) (((int32) matrix_and_bias_vector[i]) << 20)) >> 20;

	bias_vector[0] = (int32) (matrix_and_bias_vector[9] & 0xFF);
	bias_vector[1] = (int32) (matrix_and_bias_vector[10] & 0xFF);
	bias_vector[2] = (int32) (matrix_and_bias_vector[11] & 0xFF);

	Y_low_limit = (int32) clamp_vector[0];
	Y_high_limit = (int32) clamp_vector[1];
	C_low_limit = (int32) clamp_vector[2];
	C_high_limit = (int32) clamp_vector[3];

	if (look_up_table == 0)	/* check for NULL point */
		_is_lookup_table_enabled = 0;
	else
		_is_lookup_table_enabled = 1;

	/* clamp */
	if (comp_C0 < Y_low_limit)
		comp_C0 = Y_low_limit;

	if (comp_C0 > Y_high_limit)
		comp_C0 = Y_high_limit;

	if (comp_C1 < C_low_limit)
		comp_C1 = C_low_limit;

	if (comp_C1 > C_high_limit)
		comp_C1 = C_high_limit;

	if (comp_C2 < C_low_limit)
		comp_C2 = C_low_limit;

	if (comp_C2 > C_high_limit)
		comp_C2 = C_high_limit;

	/*
	 * Color Conversion
	 * pre bias (-)
	 */
	comp_C0 -= bias_vector[0];
	comp_C1 -= bias_vector[1];
	comp_C2 -= bias_vector[2];

	/* matrix multiplication */
	temp1 = comp_C0 * matrix[0] + comp_C1 * matrix[1] + comp_C2 * matrix[2];
	temp2 = comp_C0 * matrix[3] + comp_C1 * matrix[4] + comp_C2 * matrix[5];
	temp3 = comp_C0 * matrix[6] + comp_C1 * matrix[7] + comp_C2 * matrix[8];

	comp_C0 = temp1 + 0x100;
	comp_C1 = temp2 + 0x100;
	comp_C2 = temp3 + 0x100;

	/* take interger part */
	comp_C0 >>= 9;
	comp_C1 >>= 9;
	comp_C2 >>= 9;

	/* reorder output colors */
	temp = comp_C0;
	comp_C0 = comp_C1;
	comp_C1 = comp_C2;
	comp_C2 = temp;

	/* limit pixel to 8-bit */
	if (comp_C0 < 0)
		comp_C0 = 0;

	if (comp_C0 > 255)
		comp_C0 = 255;

	if (comp_C1 < 0)
		comp_C1 = 0;

	if (comp_C1 > 255)
		comp_C1 = 255;

	if (comp_C2 < 0)
		comp_C2 = 0;

	if (comp_C2 > 255)
		comp_C2 = 255;

	/* Look-up table */
	if (_is_lookup_table_enabled == 1) {
		comp_C2 = (look_up_table[comp_C2] >> 16) & 0xFF;
		comp_C1 = (look_up_table[comp_C1] >> 8) & 0xFF;
		comp_C0 = (look_up_table[comp_C0] >> 0) & 0xFF;
	}

	output = (comp_C2 << 16) | (comp_C1 << 8) | comp_C0;
	return output;
}

static uint32 mdp_calc_tpval(MDPIMG *mdpImg)
{
	uint32 tpVal;
	uint8 plane_tp;

	tpVal = 0;
	if ((mdpImg->imgType == MDP_RGB_565)
	    || (mdpImg->imgType == MDP_BGR_565)) {
		/*
		 * transparent color conversion into 24 bpp
		 *
		 * C2R_8BIT
		 * left shift the entire bit and or it with the upper most bits
		 */
		plane_tp = (uint8) ((mdpImg->tpVal & 0xF800) >> 11);
		tpVal |= ((plane_tp << 3) | ((plane_tp & 0x1C) >> 2)) << 16;

		/* C1B_8BIT */
		plane_tp = (uint8) (mdpImg->tpVal & 0x1F);
		tpVal |= ((plane_tp << 3) | ((plane_tp & 0x1C) >> 2)) << 8;

		/* C0G_8BIT */
		plane_tp = (uint8) ((mdpImg->tpVal & 0x7E0) >> 5);
		tpVal |= ((plane_tp << 2) | ((plane_tp & 0x30) >> 4));
	} else {
		/* 24bit RGB to RBG conversion */

		tpVal = (mdpImg->tpVal & 0xFF00) >> 8;
		tpVal |= (mdpImg->tpVal & 0xFF) << 8;
		tpVal |= (mdpImg->tpVal & 0xFF0000);
	}

	return tpVal;
}

static uint8 *mdp_get_chroma_addr(MDPIBUF *iBuf)
{
	uint8 *dest1;

	dest1 = NULL;
	switch (iBuf->ibuf_type) {
	case MDP_Y_CBCR_H2V2:
	case MDP_Y_CRCB_H2V2:
	case MDP_Y_CBCR_H2V1:
	case MDP_Y_CRCB_H2V1:
		dest1 = (uint8 *) iBuf->buf;
		dest1 += iBuf->ibuf_width * iBuf->ibuf_height * iBuf->bpp;
		break;

	default:
		break;
	}

	return dest1;
}

static void mdp_ppp_setbg(MDPIBUF *iBuf)
{
	uint8 *bg0_addr;
	uint8 *bg1_addr;
	uint32 bg0_ystride, bg1_ystride;
	uint32 ppp_src_cfg_reg, unpack_pattern;
	int v_slice, h_slice;

	v_slice = h_slice = 1;
	bg0_addr = (uint8 *) iBuf->buf;
	bg1_addr = mdp_get_chroma_addr(iBuf);

	bg0_ystride = iBuf->ibuf_width * iBuf->bpp;
	bg1_ystride = iBuf->ibuf_width * iBuf->bpp;

	switch (iBuf->ibuf_type) {
	case MDP_BGR_565:
	case MDP_RGB_565:
		/* 888 = 3bytes
		 * RGB = 3Components
		 * RGB interleaved
		 */
		ppp_src_cfg_reg = PPP_SRC_C2R_5BITS | PPP_SRC_C0G_6BITS |
			PPP_SRC_C1B_5BITS | PPP_SRC_BPP_INTERLVD_2BYTES |
			PPP_SRC_INTERLVD_3COMPONENTS | PPP_SRC_UNPACK_TIGHT |
			PPP_SRC_UNPACK_ALIGN_LSB |
			PPP_SRC_FETCH_PLANES_INTERLVD;

		if (iBuf->ibuf_type == MDP_RGB_565)
			unpack_pattern =
			    MDP_GET_PACK_PATTERN(0, CLR_R, CLR_G, CLR_B, 8);
		else
			unpack_pattern =
			    MDP_GET_PACK_PATTERN(0, CLR_B, CLR_G, CLR_R, 8);
		break;

	case MDP_RGB_888:
		/*
		 * 888 = 3bytes
		 * RGB = 3Components
		 * RGB interleaved
		 */
		ppp_src_cfg_reg = PPP_SRC_C2R_8BITS | PPP_SRC_C0G_8BITS |
		PPP_SRC_C1B_8BITS | PPP_SRC_BPP_INTERLVD_3BYTES |
		PPP_SRC_INTERLVD_3COMPONENTS | PPP_SRC_UNPACK_TIGHT |
		PPP_SRC_UNPACK_ALIGN_LSB | PPP_SRC_FETCH_PLANES_INTERLVD;

		unpack_pattern =
		    MDP_GET_PACK_PATTERN(0, CLR_R, CLR_G, CLR_B, 8);
		break;

	case MDP_BGRA_8888:
	case MDP_RGBA_8888:
	case MDP_ARGB_8888:
	case MDP_XRGB_8888:
		/*
		 * 8888 = 4bytes
		 * ARGB = 4Components
		 * ARGB interleaved
		 */
		ppp_src_cfg_reg = PPP_SRC_C2R_8BITS | PPP_SRC_C0G_8BITS |
		PPP_SRC_C1B_8BITS | PPP_SRC_C3A_8BITS | PPP_SRC_C3_ALPHA_EN |
		PPP_SRC_BPP_INTERLVD_4BYTES | PPP_SRC_INTERLVD_4COMPONENTS |
		PPP_SRC_UNPACK_TIGHT | PPP_SRC_UNPACK_ALIGN_LSB |
		PPP_SRC_FETCH_PLANES_INTERLVD;

		if (iBuf->ibuf_type == MDP_BGRA_8888)
			unpack_pattern =
			    MDP_GET_PACK_PATTERN(CLR_ALPHA, CLR_R, CLR_G, CLR_B,
						 8);
		else if (iBuf->ibuf_type == MDP_RGBA_8888)
			unpack_pattern =
			    MDP_GET_PACK_PATTERN(CLR_ALPHA, CLR_B, CLR_G, CLR_R,
						 8);
		else
			unpack_pattern =
			    MDP_GET_PACK_PATTERN(CLR_ALPHA, CLR_R, CLR_G, CLR_B,
						 8);
		break;

	case MDP_Y_CBCR_H2V2:
	case MDP_Y_CRCB_H2V2:
		ppp_src_cfg_reg = PPP_SRC_C2R_8BITS |
		    PPP_SRC_C0G_8BITS |
		    PPP_SRC_C1B_8BITS |
		    PPP_SRC_C3A_8BITS |
		    PPP_SRC_BPP_INTERLVD_2BYTES |
		    PPP_SRC_INTERLVD_2COMPONENTS |
		    PPP_SRC_UNPACK_TIGHT |
		    PPP_SRC_UNPACK_ALIGN_LSB | PPP_SRC_FETCH_PLANES_PSEUDOPLNR;

		if (iBuf->ibuf_type == MDP_Y_CBCR_H2V1)
			unpack_pattern =
			    MDP_GET_PACK_PATTERN(0, 0, CLR_CB, CLR_CR, 8);
		else
			unpack_pattern =
			    MDP_GET_PACK_PATTERN(0, 0, CLR_CR, CLR_CB, 8);
		v_slice = h_slice = 2;
		break;

	case MDP_YCRYCB_H2V1:
		ppp_src_cfg_reg = PPP_SRC_C2R_8BITS |
		    PPP_SRC_C0G_8BITS |
		    PPP_SRC_C1B_8BITS |
		    PPP_SRC_C3A_8BITS |
		    PPP_SRC_BPP_INTERLVD_2BYTES |
		    PPP_SRC_INTERLVD_4COMPONENTS |
		    PPP_SRC_UNPACK_TIGHT | PPP_SRC_UNPACK_ALIGN_LSB;

		unpack_pattern =
		    MDP_GET_PACK_PATTERN(CLR_Y, CLR_CR, CLR_Y, CLR_CB, 8);
		h_slice = 2;
		break;

	case MDP_Y_CBCR_H2V1:
	case MDP_Y_CRCB_H2V1:
		ppp_src_cfg_reg = PPP_SRC_C2R_8BITS |
		    PPP_SRC_C0G_8BITS |
		    PPP_SRC_C1B_8BITS |
		    PPP_SRC_C3A_8BITS |
		    PPP_SRC_BPP_INTERLVD_2BYTES |
		    PPP_SRC_INTERLVD_2COMPONENTS |
		    PPP_SRC_UNPACK_TIGHT |
		    PPP_SRC_UNPACK_ALIGN_LSB | PPP_SRC_FETCH_PLANES_PSEUDOPLNR;

		if (iBuf->ibuf_type == MDP_Y_CBCR_H2V1)
			unpack_pattern =
			    MDP_GET_PACK_PATTERN(0, 0, CLR_CB, CLR_CR, 8);
		else
			unpack_pattern =
			    MDP_GET_PACK_PATTERN(0, 0, CLR_CR, CLR_CB, 8);
		h_slice = 2;
		break;

	default:
		return;
	}

	/* starting input address adjustment */
	mdp_adjust_start_addr(&bg0_addr, &bg1_addr, v_slice, h_slice,
			      iBuf->roi.lcd_x, iBuf->roi.lcd_y,
			      iBuf->ibuf_width, iBuf->ibuf_height, iBuf->bpp,
			      iBuf, 1);

	/*
	 * 0x01c0: background plane 0 addr
	 * 0x01c4: background plane 1 addr
	 * 0x01c8: background plane 2 addr
	 * 0x01cc: bg y stride for plane 0 and 1
	 * 0x01d0: bg y stride for plane 2
	 * 0x01d4: bg src PPP config
	 * 0x01d8: unpack pattern
	 */
	MDP_OUTP(MDP_CMD_DEBUG_ACCESS_BASE + 0x01c0, bg0_addr);
	MDP_OUTP(MDP_CMD_DEBUG_ACCESS_BASE + 0x01c4, bg1_addr);

	MDP_OUTP(MDP_CMD_DEBUG_ACCESS_BASE + 0x01cc,
		 (bg1_ystride << 16) | bg0_ystride);
	MDP_OUTP(MDP_CMD_DEBUG_ACCESS_BASE + 0x01d4, ppp_src_cfg_reg);

	MDP_OUTP(MDP_CMD_DEBUG_ACCESS_BASE + 0x01d8, unpack_pattern);
}

#define IS_PSEUDOPLNR(img) ((img == MDP_Y_CRCB_H2V2) | \
				(img == MDP_Y_CBCR_H2V2) | \
				(img == MDP_Y_CRCB_H2V1) | \
				(img == MDP_Y_CBCR_H2V1))

#define IMG_LEN(rect_h, w, rect_w, bpp) (((rect_h) * w) * bpp)

#define Y_TO_CRCB_RATIO(format) \
	((format == MDP_Y_CBCR_H2V2 || format == MDP_Y_CRCB_H2V2) ?  2 :\
	(format == MDP_Y_CBCR_H2V1 || format == MDP_Y_CRCB_H2V1) ?  1 : 1)

static void get_len(struct mdp_img *img, struct mdp_rect *rect, uint32_t bpp,
			uint32_t *len0, uint32_t *len1)
{
	*len0 = IMG_LEN(rect->h, img->width, rect->w, bpp);
	if (IS_PSEUDOPLNR(img->format))
		*len1 = *len0/Y_TO_CRCB_RATIO(img->format);
	else
		*len1 = 0;
}

static void flush_imgs(struct mdp_blit_req *req, int src_bpp, int dst_bpp,
			struct file *p_src_file, struct file *p_dst_file)
{
#ifdef CONFIG_ANDROID_PMEM
	uint32_t src0_len, src1_len, dst0_len, dst1_len;

	/* flush src images to memory before dma to mdp */
	get_len(&req->src, &req->src_rect, src_bpp,
	&src0_len, &src1_len);

	flush_pmem_file(p_src_file,
	req->src.offset, src0_len);

	if (IS_PSEUDOPLNR(req->src.format))
		flush_pmem_file(p_src_file,
			req->src.offset + src0_len, src1_len);

	get_len(&req->dst, &req->dst_rect, dst_bpp, &dst0_len, &dst1_len);
	flush_pmem_file(p_dst_file, req->dst.offset, dst0_len);

	if (IS_PSEUDOPLNR(req->dst.format))
		flush_pmem_file(p_dst_file,
			req->dst.offset + dst0_len, dst1_len);
#endif
}

static void mdp_start_ppp(struct msm_fb_data_type *mfd, MDPIBUF *iBuf,
struct mdp_blit_req *req, struct file *p_src_file, struct file *p_dst_file)
{
	uint8 *src0, *src1;
	uint8 *dest0, *dest1;
	uint16 inpBpp;
	uint32 dest0_ystride;
	uint32 src_width;
	uint32 src_height;
	uint32 src0_ystride;
	uint32 dst_roi_width;
	uint32 dst_roi_height;
	uint32 ppp_src_cfg_reg, ppp_operation_reg, ppp_dst_cfg_reg;
	uint32 alpha, tpVal;
	uint32 packPattern;
	uint32 dst_packPattern;
	boolean inputRGB, outputRGB, pseudoplanr_output;
	int sv_slice, sh_slice;
	int dv_slice, dh_slice;
	boolean perPixelAlpha = FALSE;
	boolean ppp_lookUp_enable = FALSE;

	sv_slice = sh_slice = dv_slice = dh_slice = 1;
	alpha = tpVal = 0;
	src_width = iBuf->mdpImg.width;
	src_height = iBuf->roi.y + iBuf->roi.height;
	src1 = NULL;
	dest1 = NULL;

	inputRGB = outputRGB = TRUE;
	pseudoplanr_output = FALSE;
	ppp_operation_reg = 0;
	ppp_dst_cfg_reg = 0;
	ppp_src_cfg_reg = 0;

	/* Wait for the pipe to clear */
	do { } while (mdp_ppp_pipe_wait() <= 0);

	/*
	 * destination config
	 */
	switch (iBuf->ibuf_type) {
	case MDP_RGB_888:
		dst_packPattern =
		    MDP_GET_PACK_PATTERN(0, CLR_R, CLR_G, CLR_B, 8);
		ppp_dst_cfg_reg =
		    PPP_DST_C0G_8BIT | PPP_DST_C1B_8BIT | PPP_DST_C2R_8BIT |
		    PPP_DST_PACKET_CNT_INTERLVD_3ELEM | PPP_DST_PACK_TIGHT |
		    PPP_DST_PACK_ALIGN_LSB | PPP_DST_OUT_SEL_AXI |
		    PPP_DST_BPP_3BYTES | PPP_DST_PLANE_INTERLVD;
		break;

	case MDP_XRGB_8888:
	case MDP_ARGB_8888:
	case MDP_RGBA_8888:
		if (iBuf->ibuf_type == MDP_BGRA_8888)
			dst_packPattern =
			    MDP_GET_PACK_PATTERN(CLR_ALPHA, CLR_R, CLR_G, CLR_B,
						 8);
		else if (iBuf->ibuf_type == MDP_RGBA_8888)
			dst_packPattern =
			    MDP_GET_PACK_PATTERN(CLR_ALPHA, CLR_B, CLR_G, CLR_R,
						 8);
		else
			dst_packPattern =
			    MDP_GET_PACK_PATTERN(CLR_ALPHA, CLR_R, CLR_G, CLR_B,
						 8);

		ppp_dst_cfg_reg = PPP_DST_C0G_8BIT |
		    PPP_DST_C1B_8BIT |
		    PPP_DST_C2R_8BIT |
		    PPP_DST_C3A_8BIT |
		    PPP_DST_C3ALPHA_EN |
		    PPP_DST_PACKET_CNT_INTERLVD_4ELEM |
		    PPP_DST_PACK_TIGHT |
		    PPP_DST_PACK_ALIGN_LSB |
		    PPP_DST_OUT_SEL_AXI |
		    PPP_DST_BPP_4BYTES | PPP_DST_PLANE_INTERLVD;
		break;

	case MDP_Y_CBCR_H2V2:
	case MDP_Y_CRCB_H2V2:
		if (iBuf->ibuf_type == MDP_Y_CBCR_H2V2)
			dst_packPattern =
			    MDP_GET_PACK_PATTERN(0, 0, CLR_CB, CLR_CR, 8);
		else
			dst_packPattern =
			    MDP_GET_PACK_PATTERN(0, 0, CLR_CR, CLR_CB, 8);

		ppp_dst_cfg_reg = PPP_DST_C2R_8BIT |
		    PPP_DST_C0G_8BIT |
		    PPP_DST_C1B_8BIT |
		    PPP_DST_C3A_8BIT |
		    PPP_DST_PACKET_CNT_INTERLVD_2ELEM |
		    PPP_DST_PACK_TIGHT |
		    PPP_DST_PACK_ALIGN_LSB |
		    PPP_DST_OUT_SEL_AXI | PPP_DST_BPP_2BYTES;

		ppp_operation_reg |= PPP_OP_DST_CHROMA_420;
		outputRGB = FALSE;
		pseudoplanr_output = TRUE;
		/*
		 * vertically (y direction) and horizontally (x direction)
		 * sample reduction by 2
		 */

		/*
		 * H2V2(YUV420) Cosite
		 *
		 * Y    Y    Y    Y
		 * CbCr      CbCr
		 * Y    Y    Y    Y
		 * Y    Y    Y    Y
		 * CbCr      CbCr
		 * Y    Y    Y    Y
		 */
		dv_slice = dh_slice = 2;

		/* (x,y) and (width,height) must be even numbern */
		iBuf->roi.lcd_x = (iBuf->roi.lcd_x / 2) * 2;
		iBuf->roi.dst_width = (iBuf->roi.dst_width / 2) * 2;
		iBuf->roi.x = (iBuf->roi.x / 2) * 2;
		iBuf->roi.width = (iBuf->roi.width / 2) * 2;

		iBuf->roi.lcd_y = (iBuf->roi.lcd_y / 2) * 2;
		iBuf->roi.dst_height = (iBuf->roi.dst_height / 2) * 2;
		iBuf->roi.y = (iBuf->roi.y / 2) * 2;
		iBuf->roi.height = (iBuf->roi.height / 2) * 2;
		break;

	case MDP_YCRYCB_H2V1:
		dst_packPattern =
		    MDP_GET_PACK_PATTERN(CLR_Y, CLR_CR, CLR_Y, CLR_CB, 8);
		ppp_dst_cfg_reg =
		    PPP_DST_C2R_8BIT | PPP_DST_C0G_8BIT | PPP_DST_C1B_8BIT |
		    PPP_DST_C3A_8BIT | PPP_DST_PACKET_CNT_INTERLVD_4ELEM |
		    PPP_DST_PACK_TIGHT | PPP_DST_PACK_ALIGN_LSB |
		    PPP_DST_OUT_SEL_AXI | PPP_DST_BPP_2BYTES |
		    PPP_DST_PLANE_INTERLVD;

		ppp_operation_reg |= PPP_OP_DST_CHROMA_H2V1;
		outputRGB = FALSE;
		/*
		 * horizontally (x direction) sample reduction by 2
		 *
		 * H2V1(YUV422) Cosite
		 *
		 * YCbCr    Y    YCbCr    Y
		 * YCbCr    Y    YCbCr    Y
		 * YCbCr    Y    YCbCr    Y
		 * YCbCr    Y    YCbCr    Y
		 */
		dh_slice = 2;

		/*
		 * if it's TV-Out/MDP_YCRYCB_H2V1, let's go through the
		 * preloaded gamma setting of 2.2 when the content is
		 * non-linear ppp_lookUp_enable = TRUE;
		 */

		/* x and width must be even number */
		iBuf->roi.lcd_x = (iBuf->roi.lcd_x / 2) * 2;
		iBuf->roi.dst_width = (iBuf->roi.dst_width / 2) * 2;
		iBuf->roi.x = (iBuf->roi.x / 2) * 2;
		iBuf->roi.width = (iBuf->roi.width / 2) * 2;
		break;

	case MDP_Y_CBCR_H2V1:
	case MDP_Y_CRCB_H2V1:
		if (iBuf->ibuf_type == MDP_Y_CBCR_H2V1)
			dst_packPattern =
			    MDP_GET_PACK_PATTERN(0, 0, CLR_CB, CLR_CR, 8);
		else
			dst_packPattern =
			    MDP_GET_PACK_PATTERN(0, 0, CLR_CR, CLR_CB, 8);

		ppp_dst_cfg_reg = PPP_DST_C2R_8BIT |
		    PPP_DST_C0G_8BIT |
		    PPP_DST_C1B_8BIT |
		    PPP_DST_C3A_8BIT |
		    PPP_DST_PACKET_CNT_INTERLVD_2ELEM |
		    PPP_DST_PACK_TIGHT |
		    PPP_DST_PACK_ALIGN_LSB |
		    PPP_DST_OUT_SEL_AXI | PPP_DST_BPP_2BYTES;

		ppp_operation_reg |= PPP_OP_DST_CHROMA_H2V1;
		outputRGB = FALSE;
		pseudoplanr_output = TRUE;
		/* horizontally (x direction) sample reduction by 2 */
		dh_slice = 2;

		/* x and width must be even number */
		iBuf->roi.lcd_x = (iBuf->roi.lcd_x / 2) * 2;
		iBuf->roi.dst_width = (iBuf->roi.dst_width / 2) * 2;
		iBuf->roi.x = (iBuf->roi.x / 2) * 2;
		iBuf->roi.width = (iBuf->roi.width / 2) * 2;
		break;

	case MDP_BGR_565:
	case MDP_RGB_565:
	default:
		if (iBuf->ibuf_type == MDP_RGB_565)
			dst_packPattern =
			    MDP_GET_PACK_PATTERN(0, CLR_R, CLR_G, CLR_B, 8);
		else
			dst_packPattern =
			    MDP_GET_PACK_PATTERN(0, CLR_B, CLR_G, CLR_R, 8);

		ppp_dst_cfg_reg = PPP_DST_C0G_6BIT |
		    PPP_DST_C1B_5BIT |
		    PPP_DST_C2R_5BIT |
		    PPP_DST_PACKET_CNT_INTERLVD_3ELEM |
		    PPP_DST_PACK_TIGHT |
		    PPP_DST_PACK_ALIGN_LSB |
		    PPP_DST_OUT_SEL_AXI |
		    PPP_DST_BPP_2BYTES | PPP_DST_PLANE_INTERLVD;
		break;
	}

	/* source config */
	switch (iBuf->mdpImg.imgType) {
	case MDP_RGB_888:
		inpBpp = 3;
		/*
		 * 565 = 2bytes
		 * RGB = 3Components
		 * RGB interleaved
		 */
		ppp_src_cfg_reg = PPP_SRC_C2R_8BITS | PPP_SRC_C0G_8BITS |
			PPP_SRC_C1B_8BITS | PPP_SRC_BPP_INTERLVD_3BYTES |
			PPP_SRC_INTERLVD_3COMPONENTS | PPP_SRC_UNPACK_TIGHT |
			PPP_SRC_UNPACK_ALIGN_LSB |
			PPP_SRC_FETCH_PLANES_INTERLVD;

		packPattern = MDP_GET_PACK_PATTERN(0, CLR_R, CLR_G, CLR_B, 8);

		ppp_operation_reg |= PPP_OP_COLOR_SPACE_RGB |
		    PPP_OP_SRC_CHROMA_RGB | PPP_OP_DST_CHROMA_RGB;
		break;

	case MDP_BGRA_8888:
	case MDP_RGBA_8888:
	case MDP_ARGB_8888:
		perPixelAlpha = TRUE;
	case MDP_XRGB_8888:
		inpBpp = 4;
		/*
		 * 8888 = 4bytes
		 * ARGB = 4Components
		 * ARGB interleaved
		 */
		ppp_src_cfg_reg = PPP_SRC_C2R_8BITS | PPP_SRC_C0G_8BITS |
			PPP_SRC_C1B_8BITS | PPP_SRC_C3A_8BITS |
			PPP_SRC_C3_ALPHA_EN | PPP_SRC_BPP_INTERLVD_4BYTES |
			PPP_SRC_INTERLVD_4COMPONENTS | PPP_SRC_UNPACK_TIGHT |
			PPP_SRC_UNPACK_ALIGN_LSB |
			PPP_SRC_FETCH_PLANES_INTERLVD;

		if (iBuf->mdpImg.imgType == MDP_BGRA_8888)
			packPattern =
			    MDP_GET_PACK_PATTERN(CLR_ALPHA, CLR_R, CLR_G, CLR_B,
						 8);
		else if (iBuf->mdpImg.imgType == MDP_RGBA_8888)
			packPattern =
			    MDP_GET_PACK_PATTERN(CLR_ALPHA, CLR_B, CLR_G, CLR_R,
						 8);
		else
			packPattern =
			    MDP_GET_PACK_PATTERN(CLR_ALPHA, CLR_R, CLR_G, CLR_B,
						 8);

		ppp_operation_reg |= PPP_OP_COLOR_SPACE_RGB |
		    PPP_OP_SRC_CHROMA_RGB | PPP_OP_DST_CHROMA_RGB;
		break;

	case MDP_Y_CBCR_H2V2:
	case MDP_Y_CRCB_H2V2:
		inpBpp = 1;
		src1 = (uint8 *) iBuf->mdpImg.cbcr_addr;

		/*
		 * CbCr = 2bytes
		 * CbCr = 2Components
		 * Y+CbCr
		 */
		ppp_src_cfg_reg = PPP_SRC_C2R_8BITS | PPP_SRC_C0G_8BITS |
			PPP_SRC_C1B_8BITS | PPP_SRC_BPP_INTERLVD_2BYTES |
			PPP_SRC_INTERLVD_2COMPONENTS | PPP_SRC_UNPACK_TIGHT |
			PPP_SRC_UNPACK_ALIGN_LSB |
			PPP_SRC_FETCH_PLANES_PSEUDOPLNR;

		if (iBuf->mdpImg.imgType == MDP_Y_CRCB_H2V2)
			packPattern =
			    MDP_GET_PACK_PATTERN(0, 0, CLR_CR, CLR_CB, 8);
		else
			packPattern =
			    MDP_GET_PACK_PATTERN(0, 0, CLR_CB, CLR_CR, 8);

		ppp_operation_reg |= PPP_OP_COLOR_SPACE_YCBCR |
		    PPP_OP_SRC_CHROMA_420 |
		    PPP_OP_SRC_CHROMA_COSITE |
		    PPP_OP_DST_CHROMA_RGB | PPP_OP_DST_CHROMA_COSITE;

		inputRGB = FALSE;
		sh_slice = sv_slice = 2;
		break;

	case MDP_YCRYCB_H2V1:
		inpBpp = 2;
		ppp_src_cfg_reg = PPP_SRC_C2R_8BITS |
		    PPP_SRC_C0G_8BITS |
		    PPP_SRC_C1B_8BITS |
		    PPP_SRC_C3A_8BITS |
		    PPP_SRC_BPP_INTERLVD_2BYTES |
		    PPP_SRC_INTERLVD_4COMPONENTS |
		    PPP_SRC_UNPACK_TIGHT | PPP_SRC_UNPACK_ALIGN_LSB;

		packPattern =
		    MDP_GET_PACK_PATTERN(CLR_Y, CLR_CR, CLR_Y, CLR_CB, 8);

		ppp_operation_reg |= PPP_OP_SRC_CHROMA_H2V1 |
		    PPP_OP_SRC_CHROMA_COSITE | PPP_OP_DST_CHROMA_COSITE;

		/*
		 * if it's TV-Out/MDP_YCRYCB_H2V1, let's go through the
		 * preloaded inverse gamma setting of 2.2 since they're
		 * symetric when the content is non-linear
		 * ppp_lookUp_enable = TRUE;
		 */

		/* x and width must be even number */
		iBuf->roi.lcd_x = (iBuf->roi.lcd_x / 2) * 2;
		iBuf->roi.dst_width = (iBuf->roi.dst_width / 2) * 2;
		iBuf->roi.x = (iBuf->roi.x / 2) * 2;
		iBuf->roi.width = (iBuf->roi.width / 2) * 2;

		inputRGB = FALSE;
		sh_slice = 2;
		break;

	case MDP_Y_CBCR_H2V1:
	case MDP_Y_CRCB_H2V1:
		inpBpp = 1;
		src1 = (uint8 *) iBuf->mdpImg.cbcr_addr;

		ppp_src_cfg_reg = PPP_SRC_C2R_8BITS |
		    PPP_SRC_C0G_8BITS |
		    PPP_SRC_C1B_8BITS |
		    PPP_SRC_C3A_8BITS |
		    PPP_SRC_BPP_INTERLVD_2BYTES |
		    PPP_SRC_INTERLVD_2COMPONENTS |
		    PPP_SRC_UNPACK_TIGHT |
		    PPP_SRC_UNPACK_ALIGN_LSB | PPP_SRC_FETCH_PLANES_PSEUDOPLNR;

		if (iBuf->mdpImg.imgType == MDP_Y_CBCR_H2V1)
			packPattern =
			    MDP_GET_PACK_PATTERN(0, 0, CLR_CB, CLR_CR, 8);
		else
			packPattern =
			    MDP_GET_PACK_PATTERN(0, 0, CLR_CR, CLR_CB, 8);

		ppp_operation_reg |= PPP_OP_SRC_CHROMA_H2V1 |
		    PPP_OP_SRC_CHROMA_COSITE | PPP_OP_DST_CHROMA_COSITE;
		inputRGB = FALSE;
		sh_slice = 2;
		break;

	case MDP_BGR_565:
	case MDP_RGB_565:
	default:
		inpBpp = 2;
		/*
		 * 565 = 2bytes
		 * RGB = 3Components
		 * RGB interleaved
		 */
		ppp_src_cfg_reg = PPP_SRC_C2R_5BITS | PPP_SRC_C0G_6BITS |
			PPP_SRC_C1B_5BITS | PPP_SRC_BPP_INTERLVD_2BYTES |
			PPP_SRC_INTERLVD_3COMPONENTS | PPP_SRC_UNPACK_TIGHT |
			PPP_SRC_UNPACK_ALIGN_LSB |
			PPP_SRC_FETCH_PLANES_INTERLVD;

		if (iBuf->mdpImg.imgType == MDP_RGB_565)
			packPattern =
			    MDP_GET_PACK_PATTERN(0, CLR_R, CLR_G, CLR_B, 8);
		else
			packPattern =
			    MDP_GET_PACK_PATTERN(0, CLR_B, CLR_G, CLR_R, 8);

		ppp_operation_reg |= PPP_OP_COLOR_SPACE_RGB |
		    PPP_OP_SRC_CHROMA_RGB | PPP_OP_DST_CHROMA_RGB;
		break;

	}

	if (pseudoplanr_output)
		ppp_dst_cfg_reg |= PPP_DST_PLANE_PSEUDOPLN;

	/* YCbCr to RGB color conversion flag */
	if ((!inputRGB) && (outputRGB)) {
		ppp_operation_reg |= PPP_OP_CONVERT_YCBCR2RGB |
		    PPP_OP_CONVERT_ON;

		/*
		 * primary/secondary is sort of misleading term...but
		 * in mdp2.2/3.0 we only use primary matrix (forward/rev)
		 * in mdp3.1 we use set1(prim) and set2(secd)
		 */
#ifdef CONFIG_FB_MSM_MDP31
		ppp_operation_reg |= PPP_OP_CONVERT_MATRIX_SECONDARY |
					PPP_OP_DST_RGB;
		MDP_OUTP(MDP_CMD_DEBUG_ACCESS_BASE + 0x0240, 0);
#endif

		if (ppp_lookUp_enable) {
			ppp_operation_reg |= PPP_OP_LUT_C0_ON |
			    PPP_OP_LUT_C1_ON | PPP_OP_LUT_C2_ON;
		}
	}
	/* RGB to YCbCr color conversion flag */
	if ((inputRGB) && (!outputRGB)) {
		ppp_operation_reg |= PPP_OP_CONVERT_RGB2YCBCR |
		    PPP_OP_CONVERT_ON;

#ifdef CONFIG_FB_MSM_MDP31
		ppp_operation_reg |= PPP_OP_CONVERT_MATRIX_PRIMARY |
					PPP_OP_DST_YCBCR;
		MDP_OUTP(MDP_CMD_DEBUG_ACCESS_BASE + 0x0240, 0x1e);
#endif

		if (ppp_lookUp_enable) {
			ppp_operation_reg |= PPP_OP_LUT_C0_ON |
			    PPP_OP_LUT_C1_ON | PPP_OP_LUT_C2_ON;
		}
	}
	/* YCbCr to YCbCr color conversion flag */
	if ((!inputRGB) && (!outputRGB)) {
		if ((ppp_lookUp_enable) &&
		    (iBuf->mdpImg.imgType != iBuf->ibuf_type)) {
			ppp_operation_reg |= PPP_OP_LUT_C0_ON;
		}
	}

	ppp_src_cfg_reg |= (iBuf->roi.x % 2) ? PPP_SRC_BPP_ROI_ODD_X : 0;
	ppp_src_cfg_reg |= (iBuf->roi.y % 2) ? PPP_SRC_BPP_ROI_ODD_Y : 0;

	if (req->flags & MDP_DEINTERLACE)
		ppp_operation_reg |= PPP_OP_DEINT_EN;

	/* Dither at DMA side only since iBuf format is RGB888 */
	if (iBuf->mdpImg.mdpOp & MDPOP_DITHER)
		ppp_operation_reg |= PPP_OP_DITHER_EN;

	if (iBuf->mdpImg.mdpOp & MDPOP_ROTATION) {
		ppp_operation_reg |= PPP_OP_ROT_ON;

		if (iBuf->mdpImg.mdpOp & MDPOP_ROT90) {
			ppp_operation_reg |= PPP_OP_ROT_90;
		}
		if (iBuf->mdpImg.mdpOp & MDPOP_LR) {
			ppp_operation_reg |= PPP_OP_FLIP_LR;
		}
		if (iBuf->mdpImg.mdpOp & MDPOP_UD) {
			ppp_operation_reg |= PPP_OP_FLIP_UD;
		}
	}

	src0_ystride = src_width * inpBpp;
	dest0_ystride = iBuf->ibuf_width * iBuf->bpp;

	/* no need to care about rotation since it's the real-XY. */
	dst_roi_width = iBuf->roi.dst_width;
	dst_roi_height = iBuf->roi.dst_height;

	src0 = (uint8 *) iBuf->mdpImg.bmy_addr;
	dest0 = (uint8 *) iBuf->buf;

	/* Jumping from Y-Plane to Chroma Plane */
	dest1 = mdp_get_chroma_addr(iBuf);

	/* first pixel addr calculation */
	mdp_adjust_start_addr(&src0, &src1, sv_slice, sh_slice, iBuf->roi.x,
			      iBuf->roi.y, src_width, src_height, inpBpp, iBuf,
			      0);
	mdp_adjust_start_addr(&dest0, &dest1, dv_slice, dh_slice,
			      iBuf->roi.lcd_x, iBuf->roi.lcd_y,
			      iBuf->ibuf_width, iBuf->ibuf_height, iBuf->bpp,
			      iBuf, 2);

	/* set scale operation */
	mdp_set_scale(iBuf, dst_roi_width, dst_roi_height,
		      inputRGB, outputRGB, &ppp_operation_reg);

	/*
	 * setting background source for blending
	 */
	mdp_set_blend_attr(iBuf, &alpha, &tpVal, perPixelAlpha,
			   &ppp_operation_reg);

	if (ppp_operation_reg & PPP_OP_BLEND_ON) {
		mdp_ppp_setbg(iBuf);

		if (iBuf->ibuf_type == MDP_YCRYCB_H2V1) {
			ppp_operation_reg |= PPP_OP_BG_CHROMA_H2V1;

			if (iBuf->mdpImg.mdpOp & MDPOP_TRANSP) {
				tpVal = mdp_conv_matx_rgb2yuv(tpVal,
						      (uint16 *) &
						      mdp_ccs_rgb2yuv,
						      &mdp_plv[0], NULL);
			}
		}
	}

	/*
	 * 0x0004: enable dbg bus
	 * 0x0100: "don't care" Edge Condit until scaling is on
	 * 0x0104: xrc tile x&y size u7.6 format = 7bit.6bit
	 * 0x0108: src pixel size
	 * 0x010c: component plane 0 starting address
	 * 0x011c: component plane 0 ystride
	 * 0x0124: PPP source config register
	 * 0x0128: unpacked pattern from lsb to msb (eg. RGB->BGR)
	 */
	MDP_OUTP(MDP_CMD_DEBUG_ACCESS_BASE + 0x0108, (iBuf->roi.height << 16 |
						      iBuf->roi.width));
	MDP_OUTP(MDP_CMD_DEBUG_ACCESS_BASE + 0x010c, src0); /* comp.plane 0 */
	MDP_OUTP(MDP_CMD_DEBUG_ACCESS_BASE + 0x0110, src1); /* comp.plane 1 */
	MDP_OUTP(MDP_CMD_DEBUG_ACCESS_BASE + 0x011c,
		 (src0_ystride << 16 | src0_ystride));

	/* setup for rgb 565 */
	MDP_OUTP(MDP_CMD_DEBUG_ACCESS_BASE + 0x0124, ppp_src_cfg_reg);
	MDP_OUTP(MDP_CMD_DEBUG_ACCESS_BASE + 0x0128, packPattern);
	/*
	 * 0x0138: PPP destination operation register
	 * 0x014c: constant_alpha|transparent_color
	 * 0x0150: PPP destination config register
	 * 0x0154: PPP packing pattern
	 */
	MDP_OUTP(MDP_CMD_DEBUG_ACCESS_BASE + 0x0138, ppp_operation_reg);
	MDP_OUTP(MDP_CMD_DEBUG_ACCESS_BASE + 0x014c, alpha << 24 | tpVal);
	MDP_OUTP(MDP_CMD_DEBUG_ACCESS_BASE + 0x0150, ppp_dst_cfg_reg);
	MDP_OUTP(MDP_CMD_DEBUG_ACCESS_BASE + 0x0154, dst_packPattern);

	/*
	 * 0x0164: ROI height and width
	 * 0x0168: Component Plane 0 starting addr
	 * 0x016c: Component Plane 1 starting addr
	 * 0x0178: Component Plane 1/0 y stride
	 */
	MDP_OUTP(MDP_CMD_DEBUG_ACCESS_BASE + 0x0164,
		 (dst_roi_height << 16 | dst_roi_width));
	MDP_OUTP(MDP_CMD_DEBUG_ACCESS_BASE + 0x0168, dest0);
	MDP_OUTP(MDP_CMD_DEBUG_ACCESS_BASE + 0x016c, dest1);
	MDP_OUTP(MDP_CMD_DEBUG_ACCESS_BASE + 0x0178,
		 (dest0_ystride << 16 | dest0_ystride));

	flush_imgs(req, inpBpp, iBuf->bpp, p_src_file, p_dst_file);
#ifdef CONFIG_MDP_PPP_ASYNC_OP
	mdp_ppp_process_curr_djob();
#else
	mdp_pipe_kickoff(MDP_PPP_TERM, mfd);
#endif
}

static int mdp_ppp_verify_req(struct mdp_blit_req *req)
{
	u32 src_width, src_height, dst_width, dst_height;

	if (req == NULL)
		return -1;

	if (MDP_IS_IMGTYPE_BAD(req->src.format) ||
	    MDP_IS_IMGTYPE_BAD(req->dst.format))
		return -1;

	if ((req->src.width == 0) || (req->src.height == 0) ||
	    (req->src_rect.w == 0) || (req->src_rect.h == 0) ||
	    (req->dst.width == 0) || (req->dst.height == 0) ||
	    (req->dst_rect.w == 0) || (req->dst_rect.h == 0))

		return -1;

	if (((req->src_rect.x + req->src_rect.w) > req->src.width) ||
	    ((req->src_rect.y + req->src_rect.h) > req->src.height))
		return -1;

	if (((req->dst_rect.x + req->dst_rect.w) > req->dst.width) ||
	    ((req->dst_rect.y + req->dst_rect.h) > req->dst.height))
		return -1;

	/*
	 * scaling range check
	 */
	src_width = req->src_rect.w;
	src_height = req->src_rect.h;

	if (req->flags & MDP_ROT_90) {
		dst_width = req->dst_rect.h;
		dst_height = req->dst_rect.w;
	} else {
		dst_width = req->dst_rect.w;
		dst_height = req->dst_rect.h;
	}

	switch (req->dst.format) {
	case MDP_Y_CRCB_H2V2:
	case MDP_Y_CBCR_H2V2:
		src_width = (src_width / 2) * 2;
		src_height = (src_height / 2) * 2;
		dst_width = (src_width / 2) * 2;
		dst_height = (src_height / 2) * 2;
		break;

	case MDP_Y_CRCB_H2V1:
	case MDP_Y_CBCR_H2V1:
	case MDP_YCRYCB_H2V1:
		src_width = (src_width / 2) * 2;
		dst_width = (src_width / 2) * 2;
		break;

	default:
		break;
	}

	if (((MDP_SCALE_Q_FACTOR * dst_width) / src_width >
	     MDP_MAX_X_SCALE_FACTOR)
	    || ((MDP_SCALE_Q_FACTOR * dst_width) / src_width <
		MDP_MIN_X_SCALE_FACTOR))
		return -1;

	if (((MDP_SCALE_Q_FACTOR * dst_height) / src_height >
	     MDP_MAX_Y_SCALE_FACTOR)
	    || ((MDP_SCALE_Q_FACTOR * dst_height) / src_height <
		MDP_MIN_Y_SCALE_FACTOR))
		return -1;

	return 0;
}

/**
 * get_gem_img() - retrieve drm obj's start address and size
 * @img:	contains drm file descriptor and gem handle
 * @start:	repository of starting address of drm obj allocated memory
 * @len:	repository of size of drm obj alloacted memory
 *
 **/
int get_gem_img(struct mdp_img *img, unsigned long *start, unsigned long *len)
{
	panic("waaaaaaaah");
	//return kgsl_gem_obj_addr(img->memory_id, (int)img->priv, start, len);
}

int get_img(struct mdp_img *img, struct fb_info *info, unsigned long *start,
	    unsigned long *len, struct file **pp_file)
{
	int put_needed, ret = 0;
	struct file *file;
	unsigned long vstart;
#ifdef CONFIG_ANDROID_PMEM
	if (!get_pmem_file(img->memory_id, start, &vstart, len, pp_file))
		return 0;
#endif
	file = fget_light(img->memory_id, &put_needed);
	if (file == NULL)
		return -1;

	if (MAJOR(file->f_dentry->d_inode->i_rdev) == FB_MAJOR) {
		*start = info->fix.smem_start;
		*len = info->fix.smem_len;
		*pp_file = file;
	} else {
		ret = -1;
		fput_light(file, put_needed);
	}
	return ret;
}

int mdp_ppp_blit(struct fb_info *info, struct mdp_blit_req *req,
	struct file **pp_src_file, struct file **pp_dst_file)
{
	unsigned long src_start, dst_start;
	unsigned long src_len = 0;
	unsigned long dst_len = 0;
	MDPIBUF iBuf;
	u32 dst_width, dst_height;
	struct file *p_src_file = 0 , *p_dst_file = 0;
	struct msm_fb_data_type *mfd = (struct msm_fb_data_type *)info->par;

	if (req->dst.format == MDP_FB_FORMAT)
		req->dst.format =  mfd->fb_imgType;
	if (req->src.format == MDP_FB_FORMAT)
		req->src.format = mfd->fb_imgType;

	if (req->flags & MDP_BLIT_SRC_GEM) {
		if (get_gem_img(&req->src, &src_start, &src_len) < 0)
			return -1;
	} else {
		get_img(&req->src, info, &src_start, &src_len, &p_src_file);
	}
	if (src_len == 0) {
		printk(KERN_ERR "mdp_ppp: could not retrieve image from "
		       "memory\n");
		return -1;
	}

	if (req->flags & MDP_BLIT_DST_GEM) {
		if (get_gem_img(&req->dst, &dst_start, &dst_len) < 0)
			return -1;
	} else {
		get_img(&req->dst, info, &dst_start, &dst_len, &p_dst_file);
	}
	if (dst_len == 0) {
		printk(KERN_ERR "mdp_ppp: could not retrieve image from "
		       "memory\n");
		return -1;
	}
	*pp_src_file = p_src_file;
	*pp_dst_file = p_dst_file;
	if (mdp_ppp_verify_req(req)) {
		printk(KERN_ERR "mdp_ppp: invalid image!\n");
		return -1;
	}

	iBuf.ibuf_width = req->dst.width;
	iBuf.ibuf_height = req->dst.height;
	iBuf.bpp = bytes_per_pixel[req->dst.format];

	iBuf.ibuf_type = req->dst.format;
	iBuf.buf = (uint8 *) dst_start;
	iBuf.buf += req->dst.offset;

	iBuf.roi.lcd_x = req->dst_rect.x;
	iBuf.roi.lcd_y = req->dst_rect.y;
	iBuf.roi.dst_width = req->dst_rect.w;
	iBuf.roi.dst_height = req->dst_rect.h;

	iBuf.roi.x = req->src_rect.x;
	iBuf.roi.width = req->src_rect.w;
	iBuf.roi.y = req->src_rect.y;
	iBuf.roi.height = req->src_rect.h;

	iBuf.mdpImg.width = req->src.width;
	iBuf.mdpImg.imgType = req->src.format;

	iBuf.mdpImg.bmy_addr = (uint32 *) (src_start + req->src.offset);
	iBuf.mdpImg.cbcr_addr =
	    (uint32 *) ((uint32) iBuf.mdpImg.bmy_addr +
			req->src.width * req->src.height);

	iBuf.mdpImg.mdpOp = MDPOP_NOP;

	/* blending check */
	if (req->transp_mask != MDP_TRANSP_NOP) {
		iBuf.mdpImg.mdpOp |= MDPOP_TRANSP;
		iBuf.mdpImg.tpVal = req->transp_mask;
		iBuf.mdpImg.tpVal = mdp_calc_tpval(&iBuf.mdpImg);
	}

	req->alpha &= 0xff;
	if (req->alpha < MDP_ALPHA_NOP) {
		iBuf.mdpImg.mdpOp |= MDPOP_ALPHAB;
		iBuf.mdpImg.alpha = req->alpha;
	}

	/* rotation check */
	if (req->flags & MDP_FLIP_LR)
		iBuf.mdpImg.mdpOp |= MDPOP_LR;
	if (req->flags & MDP_FLIP_UD)
		iBuf.mdpImg.mdpOp |= MDPOP_UD;
	if (req->flags & MDP_ROT_90)
		iBuf.mdpImg.mdpOp |= MDPOP_ROT90;
	if (req->flags & MDP_DITHER)
		iBuf.mdpImg.mdpOp |= MDPOP_DITHER;

	if (req->flags & MDP_BLEND_FG_PREMULT) {
#ifdef CONFIG_FB_MSM_MDP31
		iBuf.mdpImg.mdpOp |= MDPOP_FG_PM_ALPHA;
#else
		return -EINVAL;
#endif
	}

	if (req->flags & MDP_DEINTERLACE) {
#ifdef CONFIG_FB_MSM_MDP31
		if ((req->src.format != MDP_Y_CBCR_H2V2) &&
			(req->src.format != MDP_Y_CRCB_H2V2))
#endif
		return -EINVAL;
	}

	/* scale check */
	if (req->flags & MDP_ROT_90) {
		dst_width = req->dst_rect.h;
		dst_height = req->dst_rect.w;
	} else {
		dst_width = req->dst_rect.w;
		dst_height = req->dst_rect.h;
	}

	if ((iBuf.roi.width != dst_width) || (iBuf.roi.height != dst_height))
		iBuf.mdpImg.mdpOp |= MDPOP_ASCALE;

	if (req->flags & MDP_BLUR) {
#ifdef CONFIG_FB_MSM_MDP31
		if (req->flags & MDP_SHARPENING)
			printk(KERN_WARNING
				"mdp: MDP_SHARPENING is set with MDP_BLUR!\n");
		req->flags |= MDP_SHARPENING;
		req->sharpening_strength = -127;
#else
		iBuf.mdpImg.mdpOp |= MDPOP_ASCALE | MDPOP_BLUR;

#endif
	}

	if (req->flags & MDP_SHARPENING) {
#ifdef CONFIG_FB_MSM_MDP31
		if ((req->sharpening_strength > 127) ||
			(req->sharpening_strength < -127)) {
			printk(KERN_ERR
				"%s: sharpening strength out of range\n",
				__func__);
			return -EINVAL;
		}

		iBuf.mdpImg.mdpOp |= MDPOP_ASCALE | MDPOP_SHARPENING;
		iBuf.mdpImg.sp_value = req->sharpening_strength & 0xff;
#else
		return -EINVAL;
#endif
	}

	down(&mdp_ppp_mutex);
	/* MDP cmd block enable */
	mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_ON, FALSE);

#ifdef CONFIG_FB_MSM_MDP31
	mdp_start_ppp(mfd, &iBuf, req, p_src_file, p_dst_file);
#else
	/* bg tile fetching HW workaround */
	if (((iBuf.mdpImg.mdpOp & (MDPOP_TRANSP | MDPOP_ALPHAB)) ||
	     (req->src.format == MDP_ARGB_8888) ||
	     (req->src.format == MDP_BGRA_8888) ||
	     (req->src.format == MDP_RGBA_8888)) &&
	    (iBuf.mdpImg.mdpOp & MDPOP_ROT90) && (req->dst_rect.w <= 16)) {
		int dst_h, src_w, i;

		src_w = req->src_rect.w;
		dst_h = iBuf.roi.dst_height;

		for (i = 0; i < (req->dst_rect.h / 16); i++) {
			/* this tile size */
			iBuf.roi.dst_height = 16;
			iBuf.roi.width =
			    (16 * req->src_rect.w) / req->dst_rect.h;

			/* if it's out of scale range... */
			if (((MDP_SCALE_Q_FACTOR * iBuf.roi.dst_height) /
			     iBuf.roi.width) > MDP_MAX_X_SCALE_FACTOR)
				iBuf.roi.width =
				    (MDP_SCALE_Q_FACTOR * iBuf.roi.dst_height) /
				    MDP_MAX_X_SCALE_FACTOR;
			else if (((MDP_SCALE_Q_FACTOR * iBuf.roi.dst_height) /
				  iBuf.roi.width) < MDP_MIN_X_SCALE_FACTOR)
				iBuf.roi.width =
				    (MDP_SCALE_Q_FACTOR * iBuf.roi.dst_height) /
				    MDP_MIN_X_SCALE_FACTOR;

			mdp_start_ppp(mfd, &iBuf, req, p_src_file, p_dst_file);

			/* next tile location */
			iBuf.roi.lcd_y += 16;
			iBuf.roi.x += iBuf.roi.width;

			/* this is for a remainder update */
			dst_h -= 16;
			src_w -= iBuf.roi.width;
		}

		if ((dst_h < 0) || (src_w < 0))
			printk
			    ("msm_fb: mdp_blt_ex() unexpected result! line:%d\n",
			     __LINE__);

		/* remainder update */
		if ((dst_h > 0) && (src_w > 0)) {
			u32 tmp_v;

			iBuf.roi.dst_height = dst_h;
			iBuf.roi.width = src_w;

			if (((MDP_SCALE_Q_FACTOR * iBuf.roi.dst_height) /
			     iBuf.roi.width) > MDP_MAX_X_SCALE_FACTOR) {
				tmp_v =
				    (MDP_SCALE_Q_FACTOR * iBuf.roi.dst_height) /
				    MDP_MAX_X_SCALE_FACTOR +
				    (MDP_SCALE_Q_FACTOR * iBuf.roi.dst_height) %
				    MDP_MAX_X_SCALE_FACTOR ? 1 : 0;

				/* move x location as roi width gets bigger */
				iBuf.roi.x -= tmp_v - iBuf.roi.width;
				iBuf.roi.width = tmp_v;
			} else
			    if (((MDP_SCALE_Q_FACTOR * iBuf.roi.dst_height) /
				 iBuf.roi.width) < MDP_MIN_X_SCALE_FACTOR) {
				tmp_v =
				    (MDP_SCALE_Q_FACTOR * iBuf.roi.dst_height) /
				    MDP_MIN_X_SCALE_FACTOR +
				    (MDP_SCALE_Q_FACTOR * iBuf.roi.dst_height) %
				    MDP_MIN_X_SCALE_FACTOR ? 1 : 0;

				/*
				 * we don't move x location for continuity of
				 * source image
				 */
				iBuf.roi.width = tmp_v;
			}

			mdp_start_ppp(mfd, &iBuf, req, p_src_file, p_dst_file);
		}
	} else {
		mdp_start_ppp(mfd, &iBuf, req, p_src_file, p_dst_file);
	}
#endif

	/* MDP cmd block disable */
	mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_OFF, FALSE);
	up(&mdp_ppp_mutex);

	return 0;
}