672 lines
18 KiB
C
672 lines
18 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* linux/drivers/video/mmp/fb/mmpfb.c
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* Framebuffer driver for Marvell Display controller.
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*
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* Copyright (C) 2012 Marvell Technology Group Ltd.
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* Authors: Zhou Zhu <zzhu3@marvell.com>
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*/
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#include <linux/module.h>
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#include <linux/dma-mapping.h>
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#include <linux/platform_device.h>
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#include "mmpfb.h"
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static int var_to_pixfmt(struct fb_var_screeninfo *var)
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{
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/*
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* Pseudocolor mode?
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*/
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if (var->bits_per_pixel == 8)
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return PIXFMT_PSEUDOCOLOR;
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/*
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* Check for YUV422PLANAR.
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*/
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if (var->bits_per_pixel == 16 && var->red.length == 8 &&
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var->green.length == 4 && var->blue.length == 4) {
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if (var->green.offset >= var->blue.offset)
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return PIXFMT_YUV422P;
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else
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return PIXFMT_YVU422P;
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}
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/*
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* Check for YUV420PLANAR.
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*/
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if (var->bits_per_pixel == 12 && var->red.length == 8 &&
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var->green.length == 2 && var->blue.length == 2) {
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if (var->green.offset >= var->blue.offset)
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return PIXFMT_YUV420P;
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else
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return PIXFMT_YVU420P;
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}
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/*
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* Check for YUV422PACK.
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*/
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if (var->bits_per_pixel == 16 && var->red.length == 16 &&
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var->green.length == 16 && var->blue.length == 16) {
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if (var->red.offset == 0)
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return PIXFMT_YUYV;
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else if (var->green.offset >= var->blue.offset)
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return PIXFMT_UYVY;
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else
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return PIXFMT_VYUY;
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}
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/*
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* Check for 565/1555.
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*/
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if (var->bits_per_pixel == 16 && var->red.length <= 5 &&
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var->green.length <= 6 && var->blue.length <= 5) {
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if (var->transp.length == 0) {
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if (var->red.offset >= var->blue.offset)
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return PIXFMT_RGB565;
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else
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return PIXFMT_BGR565;
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}
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}
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/*
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* Check for 888/A888.
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*/
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if (var->bits_per_pixel <= 32 && var->red.length <= 8 &&
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var->green.length <= 8 && var->blue.length <= 8) {
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if (var->bits_per_pixel == 24 && var->transp.length == 0) {
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if (var->red.offset >= var->blue.offset)
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return PIXFMT_RGB888PACK;
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else
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return PIXFMT_BGR888PACK;
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}
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if (var->bits_per_pixel == 32 && var->transp.offset == 24) {
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if (var->red.offset >= var->blue.offset)
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return PIXFMT_RGBA888;
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else
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return PIXFMT_BGRA888;
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} else {
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if (var->red.offset >= var->blue.offset)
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return PIXFMT_RGB888UNPACK;
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else
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return PIXFMT_BGR888UNPACK;
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}
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}
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return -EINVAL;
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}
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static void pixfmt_to_var(struct fb_var_screeninfo *var, int pix_fmt)
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{
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switch (pix_fmt) {
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case PIXFMT_RGB565:
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var->bits_per_pixel = 16;
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var->red.offset = 11; var->red.length = 5;
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var->green.offset = 5; var->green.length = 6;
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var->blue.offset = 0; var->blue.length = 5;
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var->transp.offset = 0; var->transp.length = 0;
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break;
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case PIXFMT_BGR565:
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var->bits_per_pixel = 16;
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var->red.offset = 0; var->red.length = 5;
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var->green.offset = 5; var->green.length = 6;
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var->blue.offset = 11; var->blue.length = 5;
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var->transp.offset = 0; var->transp.length = 0;
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break;
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case PIXFMT_RGB888UNPACK:
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var->bits_per_pixel = 32;
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var->red.offset = 16; var->red.length = 8;
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var->green.offset = 8; var->green.length = 8;
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var->blue.offset = 0; var->blue.length = 8;
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var->transp.offset = 0; var->transp.length = 0;
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break;
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case PIXFMT_BGR888UNPACK:
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var->bits_per_pixel = 32;
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var->red.offset = 0; var->red.length = 8;
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var->green.offset = 8; var->green.length = 8;
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var->blue.offset = 16; var->blue.length = 8;
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var->transp.offset = 0; var->transp.length = 0;
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break;
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case PIXFMT_RGBA888:
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var->bits_per_pixel = 32;
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var->red.offset = 16; var->red.length = 8;
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var->green.offset = 8; var->green.length = 8;
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var->blue.offset = 0; var->blue.length = 8;
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var->transp.offset = 24; var->transp.length = 8;
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break;
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case PIXFMT_BGRA888:
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var->bits_per_pixel = 32;
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var->red.offset = 0; var->red.length = 8;
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var->green.offset = 8; var->green.length = 8;
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var->blue.offset = 16; var->blue.length = 8;
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var->transp.offset = 24; var->transp.length = 8;
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break;
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case PIXFMT_RGB888PACK:
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var->bits_per_pixel = 24;
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var->red.offset = 16; var->red.length = 8;
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var->green.offset = 8; var->green.length = 8;
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var->blue.offset = 0; var->blue.length = 8;
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var->transp.offset = 0; var->transp.length = 0;
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break;
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case PIXFMT_BGR888PACK:
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var->bits_per_pixel = 24;
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var->red.offset = 0; var->red.length = 8;
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var->green.offset = 8; var->green.length = 8;
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var->blue.offset = 16; var->blue.length = 8;
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var->transp.offset = 0; var->transp.length = 0;
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break;
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case PIXFMT_YUV420P:
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var->bits_per_pixel = 12;
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var->red.offset = 4; var->red.length = 8;
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var->green.offset = 2; var->green.length = 2;
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var->blue.offset = 0; var->blue.length = 2;
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var->transp.offset = 0; var->transp.length = 0;
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break;
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case PIXFMT_YVU420P:
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var->bits_per_pixel = 12;
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var->red.offset = 4; var->red.length = 8;
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var->green.offset = 0; var->green.length = 2;
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var->blue.offset = 2; var->blue.length = 2;
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var->transp.offset = 0; var->transp.length = 0;
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break;
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case PIXFMT_YUV422P:
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var->bits_per_pixel = 16;
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var->red.offset = 8; var->red.length = 8;
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var->green.offset = 4; var->green.length = 4;
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var->blue.offset = 0; var->blue.length = 4;
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var->transp.offset = 0; var->transp.length = 0;
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break;
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case PIXFMT_YVU422P:
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var->bits_per_pixel = 16;
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var->red.offset = 8; var->red.length = 8;
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var->green.offset = 0; var->green.length = 4;
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var->blue.offset = 4; var->blue.length = 4;
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var->transp.offset = 0; var->transp.length = 0;
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break;
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case PIXFMT_UYVY:
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var->bits_per_pixel = 16;
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var->red.offset = 8; var->red.length = 16;
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var->green.offset = 4; var->green.length = 16;
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var->blue.offset = 0; var->blue.length = 16;
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var->transp.offset = 0; var->transp.length = 0;
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break;
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case PIXFMT_VYUY:
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var->bits_per_pixel = 16;
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var->red.offset = 8; var->red.length = 16;
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var->green.offset = 0; var->green.length = 16;
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var->blue.offset = 4; var->blue.length = 16;
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var->transp.offset = 0; var->transp.length = 0;
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break;
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case PIXFMT_YUYV:
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var->bits_per_pixel = 16;
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var->red.offset = 0; var->red.length = 16;
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var->green.offset = 4; var->green.length = 16;
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var->blue.offset = 8; var->blue.length = 16;
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var->transp.offset = 0; var->transp.length = 0;
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break;
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case PIXFMT_PSEUDOCOLOR:
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var->bits_per_pixel = 8;
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var->red.offset = 0; var->red.length = 8;
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var->green.offset = 0; var->green.length = 8;
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var->blue.offset = 0; var->blue.length = 8;
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var->transp.offset = 0; var->transp.length = 0;
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break;
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}
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}
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/*
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* fb framework has its limitation:
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* 1. input color/output color is not seprated
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* 2. fb_videomode not include output color
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* so for fb usage, we keep a output format which is not changed
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* then it's added for mmpmode
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*/
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static void fbmode_to_mmpmode(struct mmp_mode *mode,
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struct fb_videomode *videomode, int output_fmt)
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{
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u64 div_result = 1000000000000ll;
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mode->name = videomode->name;
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mode->refresh = videomode->refresh;
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mode->xres = videomode->xres;
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mode->yres = videomode->yres;
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do_div(div_result, videomode->pixclock);
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mode->pixclock_freq = (u32)div_result;
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mode->left_margin = videomode->left_margin;
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mode->right_margin = videomode->right_margin;
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mode->upper_margin = videomode->upper_margin;
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mode->lower_margin = videomode->lower_margin;
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mode->hsync_len = videomode->hsync_len;
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mode->vsync_len = videomode->vsync_len;
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mode->hsync_invert = !!(videomode->sync & FB_SYNC_HOR_HIGH_ACT);
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mode->vsync_invert = !!(videomode->sync & FB_SYNC_VERT_HIGH_ACT);
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/* no defined flag in fb, use vmode>>3*/
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mode->invert_pixclock = !!(videomode->vmode & 8);
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mode->pix_fmt_out = output_fmt;
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}
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static void mmpmode_to_fbmode(struct fb_videomode *videomode,
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struct mmp_mode *mode)
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{
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u64 div_result = 1000000000000ll;
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videomode->name = mode->name;
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videomode->refresh = mode->refresh;
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videomode->xres = mode->xres;
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videomode->yres = mode->yres;
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do_div(div_result, mode->pixclock_freq);
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videomode->pixclock = (u32)div_result;
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videomode->left_margin = mode->left_margin;
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videomode->right_margin = mode->right_margin;
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videomode->upper_margin = mode->upper_margin;
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videomode->lower_margin = mode->lower_margin;
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videomode->hsync_len = mode->hsync_len;
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videomode->vsync_len = mode->vsync_len;
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videomode->sync = (mode->hsync_invert ? FB_SYNC_HOR_HIGH_ACT : 0)
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| (mode->vsync_invert ? FB_SYNC_VERT_HIGH_ACT : 0);
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videomode->vmode = mode->invert_pixclock ? 8 : 0;
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}
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static int mmpfb_check_var(struct fb_var_screeninfo *var,
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struct fb_info *info)
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{
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struct mmpfb_info *fbi = info->par;
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if (var->bits_per_pixel == 8)
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return -EINVAL;
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/*
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* Basic geometry sanity checks.
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*/
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if (var->xoffset + var->xres > var->xres_virtual)
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return -EINVAL;
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if (var->yoffset + var->yres > var->yres_virtual)
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return -EINVAL;
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/*
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* Check size of framebuffer.
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*/
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if (var->xres_virtual * var->yres_virtual *
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(var->bits_per_pixel >> 3) > fbi->fb_size)
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return -EINVAL;
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return 0;
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}
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static unsigned int chan_to_field(unsigned int chan, struct fb_bitfield *bf)
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{
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return ((chan & 0xffff) >> (16 - bf->length)) << bf->offset;
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}
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static u32 to_rgb(u16 red, u16 green, u16 blue)
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{
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red >>= 8;
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green >>= 8;
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blue >>= 8;
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return (red << 16) | (green << 8) | blue;
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}
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static int mmpfb_setcolreg(unsigned int regno, unsigned int red,
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unsigned int green, unsigned int blue,
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unsigned int trans, struct fb_info *info)
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{
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struct mmpfb_info *fbi = info->par;
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u32 val;
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if (info->fix.visual == FB_VISUAL_TRUECOLOR && regno < 16) {
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val = chan_to_field(red, &info->var.red);
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val |= chan_to_field(green, &info->var.green);
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val |= chan_to_field(blue , &info->var.blue);
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fbi->pseudo_palette[regno] = val;
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}
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if (info->fix.visual == FB_VISUAL_PSEUDOCOLOR && regno < 256) {
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val = to_rgb(red, green, blue);
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/* TODO */
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}
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return 0;
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}
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static int mmpfb_pan_display(struct fb_var_screeninfo *var,
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struct fb_info *info)
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{
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struct mmpfb_info *fbi = info->par;
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struct mmp_addr addr;
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memset(&addr, 0, sizeof(addr));
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addr.phys[0] = (var->yoffset * var->xres_virtual + var->xoffset)
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* var->bits_per_pixel / 8 + fbi->fb_start_dma;
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mmp_overlay_set_addr(fbi->overlay, &addr);
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return 0;
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}
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static int var_update(struct fb_info *info)
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{
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struct mmpfb_info *fbi = info->par;
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struct fb_var_screeninfo *var = &info->var;
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struct fb_videomode *m;
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int pix_fmt;
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/* set pix_fmt */
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pix_fmt = var_to_pixfmt(var);
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if (pix_fmt < 0)
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return -EINVAL;
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pixfmt_to_var(var, pix_fmt);
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fbi->pix_fmt = pix_fmt;
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/* set var according to best video mode*/
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m = (struct fb_videomode *)fb_match_mode(var, &info->modelist);
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if (!m) {
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dev_err(fbi->dev, "set par: no match mode, use best mode\n");
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m = (struct fb_videomode *)fb_find_best_mode(var,
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&info->modelist);
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fb_videomode_to_var(var, m);
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}
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memcpy(&fbi->mode, m, sizeof(struct fb_videomode));
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/* fix to 2* yres */
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var->yres_virtual = var->yres * 2;
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info->fix.visual = (pix_fmt == PIXFMT_PSEUDOCOLOR) ?
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FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
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info->fix.line_length = var->xres_virtual * var->bits_per_pixel / 8;
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info->fix.ypanstep = var->yres;
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return 0;
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}
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static void mmpfb_set_win(struct fb_info *info)
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{
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struct mmpfb_info *fbi = info->par;
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struct fb_var_screeninfo *var = &info->var;
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struct mmp_win win;
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u32 stride;
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memset(&win, 0, sizeof(win));
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win.xsrc = win.xdst = fbi->mode.xres;
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win.ysrc = win.ydst = fbi->mode.yres;
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win.pix_fmt = fbi->pix_fmt;
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stride = pixfmt_to_stride(win.pix_fmt);
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win.pitch[0] = var->xres_virtual * stride;
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win.pitch[1] = win.pitch[2] =
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(stride == 1) ? (var->xres_virtual >> 1) : 0;
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mmp_overlay_set_win(fbi->overlay, &win);
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}
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static int mmpfb_set_par(struct fb_info *info)
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{
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struct mmpfb_info *fbi = info->par;
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struct fb_var_screeninfo *var = &info->var;
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struct mmp_addr addr;
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struct mmp_mode mode;
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int ret;
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ret = var_update(info);
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if (ret != 0)
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return ret;
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/* set window/path according to new videomode */
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fbmode_to_mmpmode(&mode, &fbi->mode, fbi->output_fmt);
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mmp_path_set_mode(fbi->path, &mode);
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/* set window related info */
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mmpfb_set_win(info);
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/* set address always */
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memset(&addr, 0, sizeof(addr));
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addr.phys[0] = (var->yoffset * var->xres_virtual + var->xoffset)
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* var->bits_per_pixel / 8 + fbi->fb_start_dma;
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mmp_overlay_set_addr(fbi->overlay, &addr);
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return 0;
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}
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static void mmpfb_power(struct mmpfb_info *fbi, int power)
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{
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struct mmp_addr addr;
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struct fb_var_screeninfo *var = &fbi->fb_info->var;
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/* for power on, always set address/window again */
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if (power) {
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/* set window related info */
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mmpfb_set_win(fbi->fb_info);
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/* set address always */
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memset(&addr, 0, sizeof(addr));
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addr.phys[0] = fbi->fb_start_dma +
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(var->yoffset * var->xres_virtual + var->xoffset)
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* var->bits_per_pixel / 8;
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mmp_overlay_set_addr(fbi->overlay, &addr);
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}
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mmp_overlay_set_onoff(fbi->overlay, power);
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}
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static int mmpfb_blank(int blank, struct fb_info *info)
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{
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struct mmpfb_info *fbi = info->par;
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mmpfb_power(fbi, (blank == FB_BLANK_UNBLANK));
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return 0;
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}
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static const struct fb_ops mmpfb_ops = {
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.owner = THIS_MODULE,
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.fb_blank = mmpfb_blank,
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.fb_check_var = mmpfb_check_var,
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.fb_set_par = mmpfb_set_par,
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.fb_setcolreg = mmpfb_setcolreg,
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.fb_pan_display = mmpfb_pan_display,
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.fb_fillrect = cfb_fillrect,
|
|
.fb_copyarea = cfb_copyarea,
|
|
.fb_imageblit = cfb_imageblit,
|
|
};
|
|
|
|
static int modes_setup(struct mmpfb_info *fbi)
|
|
{
|
|
struct fb_videomode *videomodes;
|
|
struct mmp_mode *mmp_modes;
|
|
struct fb_info *info = fbi->fb_info;
|
|
int videomode_num, i;
|
|
|
|
/* get videomodes from path */
|
|
videomode_num = mmp_path_get_modelist(fbi->path, &mmp_modes);
|
|
if (!videomode_num) {
|
|
dev_warn(fbi->dev, "can't get videomode num\n");
|
|
return 0;
|
|
}
|
|
/* put videomode list to info structure */
|
|
videomodes = kcalloc(videomode_num, sizeof(struct fb_videomode),
|
|
GFP_KERNEL);
|
|
if (!videomodes)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < videomode_num; i++)
|
|
mmpmode_to_fbmode(&videomodes[i], &mmp_modes[i]);
|
|
fb_videomode_to_modelist(videomodes, videomode_num, &info->modelist);
|
|
|
|
/* set videomode[0] as default mode */
|
|
memcpy(&fbi->mode, &videomodes[0], sizeof(struct fb_videomode));
|
|
fbi->output_fmt = mmp_modes[0].pix_fmt_out;
|
|
fb_videomode_to_var(&info->var, &fbi->mode);
|
|
mmp_path_set_mode(fbi->path, &mmp_modes[0]);
|
|
|
|
kfree(videomodes);
|
|
return videomode_num;
|
|
}
|
|
|
|
static int fb_info_setup(struct fb_info *info,
|
|
struct mmpfb_info *fbi)
|
|
{
|
|
int ret = 0;
|
|
/* Initialise static fb parameters.*/
|
|
info->flags = FBINFO_DEFAULT | FBINFO_PARTIAL_PAN_OK |
|
|
FBINFO_HWACCEL_XPAN | FBINFO_HWACCEL_YPAN;
|
|
info->node = -1;
|
|
strcpy(info->fix.id, fbi->name);
|
|
info->fix.type = FB_TYPE_PACKED_PIXELS;
|
|
info->fix.type_aux = 0;
|
|
info->fix.xpanstep = 0;
|
|
info->fix.ypanstep = info->var.yres;
|
|
info->fix.ywrapstep = 0;
|
|
info->fix.accel = FB_ACCEL_NONE;
|
|
info->fix.smem_start = fbi->fb_start_dma;
|
|
info->fix.smem_len = fbi->fb_size;
|
|
info->fix.visual = (fbi->pix_fmt == PIXFMT_PSEUDOCOLOR) ?
|
|
FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
|
|
info->fix.line_length = info->var.xres_virtual *
|
|
info->var.bits_per_pixel / 8;
|
|
info->fbops = &mmpfb_ops;
|
|
info->pseudo_palette = fbi->pseudo_palette;
|
|
info->screen_buffer = fbi->fb_start;
|
|
info->screen_size = fbi->fb_size;
|
|
|
|
/* For FB framework: Allocate color map and Register framebuffer*/
|
|
if (fb_alloc_cmap(&info->cmap, 256, 0) < 0)
|
|
ret = -ENOMEM;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void fb_info_clear(struct fb_info *info)
|
|
{
|
|
fb_dealloc_cmap(&info->cmap);
|
|
}
|
|
|
|
static int mmpfb_probe(struct platform_device *pdev)
|
|
{
|
|
struct mmp_buffer_driver_mach_info *mi;
|
|
struct fb_info *info;
|
|
struct mmpfb_info *fbi;
|
|
int ret, modes_num;
|
|
|
|
mi = pdev->dev.platform_data;
|
|
if (mi == NULL) {
|
|
dev_err(&pdev->dev, "no platform data defined\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* initialize fb */
|
|
info = framebuffer_alloc(sizeof(struct mmpfb_info), &pdev->dev);
|
|
if (info == NULL)
|
|
return -ENOMEM;
|
|
fbi = info->par;
|
|
|
|
/* init fb */
|
|
fbi->fb_info = info;
|
|
platform_set_drvdata(pdev, fbi);
|
|
fbi->dev = &pdev->dev;
|
|
fbi->name = mi->name;
|
|
fbi->pix_fmt = mi->default_pixfmt;
|
|
pixfmt_to_var(&info->var, fbi->pix_fmt);
|
|
mutex_init(&fbi->access_ok);
|
|
|
|
/* get display path by name */
|
|
fbi->path = mmp_get_path(mi->path_name);
|
|
if (!fbi->path) {
|
|
dev_err(&pdev->dev, "can't get the path %s\n", mi->path_name);
|
|
ret = -EINVAL;
|
|
goto failed_destroy_mutex;
|
|
}
|
|
|
|
dev_info(fbi->dev, "path %s get\n", fbi->path->name);
|
|
|
|
/* get overlay */
|
|
fbi->overlay = mmp_path_get_overlay(fbi->path, mi->overlay_id);
|
|
if (!fbi->overlay) {
|
|
ret = -EINVAL;
|
|
goto failed_destroy_mutex;
|
|
}
|
|
/* set fetch used */
|
|
mmp_overlay_set_fetch(fbi->overlay, mi->dmafetch_id);
|
|
|
|
modes_num = modes_setup(fbi);
|
|
if (modes_num < 0) {
|
|
ret = modes_num;
|
|
goto failed_destroy_mutex;
|
|
}
|
|
|
|
/*
|
|
* if get modes success, means not hotplug panels, use caculated buffer
|
|
* or use default size
|
|
*/
|
|
if (modes_num > 0) {
|
|
/* fix to 2* yres */
|
|
info->var.yres_virtual = info->var.yres * 2;
|
|
|
|
/* Allocate framebuffer memory: size = modes xy *4 */
|
|
fbi->fb_size = info->var.xres_virtual * info->var.yres_virtual
|
|
* info->var.bits_per_pixel / 8;
|
|
} else {
|
|
fbi->fb_size = MMPFB_DEFAULT_SIZE;
|
|
}
|
|
|
|
fbi->fb_start = dma_alloc_coherent(&pdev->dev, PAGE_ALIGN(fbi->fb_size),
|
|
&fbi->fb_start_dma, GFP_KERNEL);
|
|
if (fbi->fb_start == NULL) {
|
|
dev_err(&pdev->dev, "can't alloc framebuffer\n");
|
|
ret = -ENOMEM;
|
|
goto failed_destroy_mutex;
|
|
}
|
|
dev_info(fbi->dev, "fb %dk allocated\n", fbi->fb_size/1024);
|
|
|
|
/* fb power on */
|
|
if (modes_num > 0)
|
|
mmpfb_power(fbi, 1);
|
|
|
|
ret = fb_info_setup(info, fbi);
|
|
if (ret < 0)
|
|
goto failed_free_buff;
|
|
|
|
ret = register_framebuffer(info);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "Failed to register fb: %d\n", ret);
|
|
ret = -ENXIO;
|
|
goto failed_clear_info;
|
|
}
|
|
|
|
dev_info(fbi->dev, "loaded to /dev/fb%d <%s>.\n",
|
|
info->node, info->fix.id);
|
|
|
|
#ifdef CONFIG_LOGO
|
|
if (fbi->fb_start) {
|
|
fb_prepare_logo(info, 0);
|
|
fb_show_logo(info, 0);
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
|
|
failed_clear_info:
|
|
fb_info_clear(info);
|
|
failed_free_buff:
|
|
dma_free_coherent(&pdev->dev, PAGE_ALIGN(fbi->fb_size), fbi->fb_start,
|
|
fbi->fb_start_dma);
|
|
failed_destroy_mutex:
|
|
mutex_destroy(&fbi->access_ok);
|
|
dev_err(fbi->dev, "mmp-fb: frame buffer device init failed\n");
|
|
|
|
framebuffer_release(info);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct platform_driver mmpfb_driver = {
|
|
.driver = {
|
|
.name = "mmp-fb",
|
|
},
|
|
.probe = mmpfb_probe,
|
|
};
|
|
|
|
static int mmpfb_init(void)
|
|
{
|
|
return platform_driver_register(&mmpfb_driver);
|
|
}
|
|
module_init(mmpfb_init);
|
|
|
|
MODULE_AUTHOR("Zhou Zhu <zhou.zhu@marvell.com>");
|
|
MODULE_DESCRIPTION("Framebuffer driver for Marvell displays");
|
|
MODULE_LICENSE("GPL");
|