diff options
Diffstat (limited to 'drivers/video/mmp/fb/mmpfb.c')
| -rw-r--r-- | drivers/video/mmp/fb/mmpfb.c | 685 |
1 files changed, 685 insertions, 0 deletions
diff --git a/drivers/video/mmp/fb/mmpfb.c b/drivers/video/mmp/fb/mmpfb.c new file mode 100644 index 0000000..6d1fa96 --- /dev/null +++ b/drivers/video/mmp/fb/mmpfb.c @@ -0,0 +1,685 @@ +/* + * linux/drivers/video/mmp/fb/mmpfb.c + * Framebuffer driver for Marvell Display controller. + * + * Copyright (C) 2012 Marvell Technology Group Ltd. + * Authors: Zhou Zhu <zzhu3@marvell.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + * + */ +#include <linux/module.h> +#include <linux/dma-mapping.h> +#include <linux/platform_device.h> +#include "mmpfb.h" + +static int var_to_pixfmt(struct fb_var_screeninfo *var) +{ + /* + * Pseudocolor mode? + */ + if (var->bits_per_pixel == 8) + return PIXFMT_PSEUDOCOLOR; + + /* + * Check for YUV422PLANAR. + */ + if (var->bits_per_pixel == 16 && var->red.length == 8 && + var->green.length == 4 && var->blue.length == 4) { + if (var->green.offset >= var->blue.offset) + return PIXFMT_YUV422P; + else + return PIXFMT_YVU422P; + } + + /* + * Check for YUV420PLANAR. + */ + if (var->bits_per_pixel == 12 && var->red.length == 8 && + var->green.length == 2 && var->blue.length == 2) { + if (var->green.offset >= var->blue.offset) + return PIXFMT_YUV420P; + else + return PIXFMT_YVU420P; + } + + /* + * Check for YUV422PACK. + */ + if (var->bits_per_pixel == 16 && var->red.length == 16 && + var->green.length == 16 && var->blue.length == 16) { + if (var->red.offset == 0) + return PIXFMT_YUYV; + else if (var->green.offset >= var->blue.offset) + return PIXFMT_UYVY; + else + return PIXFMT_VYUY; + } + + /* + * Check for 565/1555. + */ + if (var->bits_per_pixel == 16 && var->red.length <= 5 && + var->green.length <= 6 && var->blue.length <= 5) { + if (var->transp.length == 0) { + if (var->red.offset >= var->blue.offset) + return PIXFMT_RGB565; + else + return PIXFMT_BGR565; + } + } + + /* + * Check for 888/A888. + */ + if (var->bits_per_pixel <= 32 && var->red.length <= 8 && + var->green.length <= 8 && var->blue.length <= 8) { + if (var->bits_per_pixel == 24 && var->transp.length == 0) { + if (var->red.offset >= var->blue.offset) + return PIXFMT_RGB888PACK; + else + return PIXFMT_BGR888PACK; + } + + if (var->bits_per_pixel == 32 && var->transp.offset == 24) { + if (var->red.offset >= var->blue.offset) + return PIXFMT_RGBA888; + else + return PIXFMT_BGRA888; + } else { + if (var->red.offset >= var->blue.offset) + return PIXFMT_RGB888UNPACK; + else + return PIXFMT_BGR888UNPACK; + } + + /* fall through */ + } + + return -EINVAL; +} + +static void pixfmt_to_var(struct fb_var_screeninfo *var, int pix_fmt) +{ + switch (pix_fmt) { + case PIXFMT_RGB565: + var->bits_per_pixel = 16; + var->red.offset = 11; var->red.length = 5; + var->green.offset = 5; var->green.length = 6; + var->blue.offset = 0; var->blue.length = 5; + var->transp.offset = 0; var->transp.length = 0; + break; + case PIXFMT_BGR565: + var->bits_per_pixel = 16; + var->red.offset = 0; var->red.length = 5; + var->green.offset = 5; var->green.length = 6; + var->blue.offset = 11; var->blue.length = 5; + var->transp.offset = 0; var->transp.length = 0; + break; + case PIXFMT_RGB888UNPACK: + var->bits_per_pixel = 32; + var->red.offset = 16; var->red.length = 8; + var->green.offset = 8; var->green.length = 8; + var->blue.offset = 0; var->blue.length = 8; + var->transp.offset = 0; var->transp.length = 0; + break; + case PIXFMT_BGR888UNPACK: + var->bits_per_pixel = 32; + var->red.offset = 0; var->red.length = 8; + var->green.offset = 8; var->green.length = 8; + var->blue.offset = 16; var->blue.length = 8; + var->transp.offset = 0; var->transp.length = 0; + break; + case PIXFMT_RGBA888: + var->bits_per_pixel = 32; + var->red.offset = 16; var->red.length = 8; + var->green.offset = 8; var->green.length = 8; + var->blue.offset = 0; var->blue.length = 8; + var->transp.offset = 24; var->transp.length = 8; + break; + case PIXFMT_BGRA888: + var->bits_per_pixel = 32; + var->red.offset = 0; var->red.length = 8; + var->green.offset = 8; var->green.length = 8; + var->blue.offset = 16; var->blue.length = 8; + var->transp.offset = 24; var->transp.length = 8; + break; + case PIXFMT_RGB888PACK: + var->bits_per_pixel = 24; + var->red.offset = 16; var->red.length = 8; + var->green.offset = 8; var->green.length = 8; + var->blue.offset = 0; var->blue.length = 8; + var->transp.offset = 0; var->transp.length = 0; + break; + case PIXFMT_BGR888PACK: + var->bits_per_pixel = 24; + var->red.offset = 0; var->red.length = 8; + var->green.offset = 8; var->green.length = 8; + var->blue.offset = 16; var->blue.length = 8; + var->transp.offset = 0; var->transp.length = 0; + break; + case PIXFMT_YUV420P: + var->bits_per_pixel = 12; + var->red.offset = 4; var->red.length = 8; + var->green.offset = 2; var->green.length = 2; + var->blue.offset = 0; var->blue.length = 2; + var->transp.offset = 0; var->transp.length = 0; + break; + case PIXFMT_YVU420P: + var->bits_per_pixel = 12; + var->red.offset = 4; var->red.length = 8; + var->green.offset = 0; var->green.length = 2; + var->blue.offset = 2; var->blue.length = 2; + var->transp.offset = 0; var->transp.length = 0; + break; + case PIXFMT_YUV422P: + var->bits_per_pixel = 16; + var->red.offset = 8; var->red.length = 8; + var->green.offset = 4; var->green.length = 4; + var->blue.offset = 0; var->blue.length = 4; + var->transp.offset = 0; var->transp.length = 0; + break; + case PIXFMT_YVU422P: + var->bits_per_pixel = 16; + var->red.offset = 8; var->red.length = 8; + var->green.offset = 0; var->green.length = 4; + var->blue.offset = 4; var->blue.length = 4; + var->transp.offset = 0; var->transp.length = 0; + break; + case PIXFMT_UYVY: + var->bits_per_pixel = 16; + var->red.offset = 8; var->red.length = 16; + var->green.offset = 4; var->green.length = 16; + var->blue.offset = 0; var->blue.length = 16; + var->transp.offset = 0; var->transp.length = 0; + break; + case PIXFMT_VYUY: + var->bits_per_pixel = 16; + var->red.offset = 8; var->red.length = 16; + var->green.offset = 0; var->green.length = 16; + var->blue.offset = 4; var->blue.length = 16; + var->transp.offset = 0; var->transp.length = 0; + break; + case PIXFMT_YUYV: + var->bits_per_pixel = 16; + var->red.offset = 0; var->red.length = 16; + var->green.offset = 4; var->green.length = 16; + var->blue.offset = 8; var->blue.length = 16; + var->transp.offset = 0; var->transp.length = 0; + break; + case PIXFMT_PSEUDOCOLOR: + var->bits_per_pixel = 8; + var->red.offset = 0; var->red.length = 8; + var->green.offset = 0; var->green.length = 8; + var->blue.offset = 0; var->blue.length = 8; + var->transp.offset = 0; var->transp.length = 0; + break; + } +} + +/* + * fb framework has its limitation: + * 1. input color/output color is not seprated + * 2. fb_videomode not include output color + * so for fb usage, we keep a output format which is not changed + * then it's added for mmpmode + */ +static void fbmode_to_mmpmode(struct mmp_mode *mode, + struct fb_videomode *videomode, int output_fmt) +{ + u64 div_result = 1000000000000ll; + mode->name = videomode->name; + mode->refresh = videomode->refresh; + mode->xres = videomode->xres; + mode->yres = videomode->yres; + + do_div(div_result, videomode->pixclock); + mode->pixclock_freq = (u32)div_result; + + mode->left_margin = videomode->left_margin; + mode->right_margin = videomode->right_margin; + mode->upper_margin = videomode->upper_margin; + mode->lower_margin = videomode->lower_margin; + mode->hsync_len = videomode->hsync_len; + mode->vsync_len = videomode->vsync_len; + mode->hsync_invert = !!(videomode->sync & FB_SYNC_HOR_HIGH_ACT); + mode->vsync_invert = !!(videomode->sync & FB_SYNC_VERT_HIGH_ACT); + /* no defined flag in fb, use vmode>>3*/ + mode->invert_pixclock = !!(videomode->vmode & 8); + mode->pix_fmt_out = output_fmt; +} + +static void mmpmode_to_fbmode(struct fb_videomode *videomode, + struct mmp_mode *mode) +{ + u64 div_result = 1000000000000ll; + + videomode->name = mode->name; + videomode->refresh = mode->refresh; + videomode->xres = mode->xres; + videomode->yres = mode->yres; + + do_div(div_result, mode->pixclock_freq); + videomode->pixclock = (u32)div_result; + + videomode->left_margin = mode->left_margin; + videomode->right_margin = mode->right_margin; + videomode->upper_margin = mode->upper_margin; + videomode->lower_margin = mode->lower_margin; + videomode->hsync_len = mode->hsync_len; + videomode->vsync_len = mode->vsync_len; + videomode->sync = (mode->hsync_invert ? FB_SYNC_HOR_HIGH_ACT : 0) + | (mode->vsync_invert ? FB_SYNC_VERT_HIGH_ACT : 0); + videomode->vmode = mode->invert_pixclock ? 8 : 0; +} + +static int mmpfb_check_var(struct fb_var_screeninfo *var, + struct fb_info *info) +{ + struct mmpfb_info *fbi = info->par; + + if (var->bits_per_pixel == 8) + return -EINVAL; + /* + * Basic geometry sanity checks. + */ + if (var->xoffset + var->xres > var->xres_virtual) + return -EINVAL; + if (var->yoffset + var->yres > var->yres_virtual) + return -EINVAL; + + /* + * Check size of framebuffer. + */ + if (var->xres_virtual * var->yres_virtual * + (var->bits_per_pixel >> 3) > fbi->fb_size) + return -EINVAL; + + return 0; +} + +static unsigned int chan_to_field(unsigned int chan, struct fb_bitfield *bf) +{ + return ((chan & 0xffff) >> (16 - bf->length)) << bf->offset; +} + +static u32 to_rgb(u16 red, u16 green, u16 blue) +{ + red >>= 8; + green >>= 8; + blue >>= 8; + + return (red << 16) | (green << 8) | blue; +} + +static int mmpfb_setcolreg(unsigned int regno, unsigned int red, + unsigned int green, unsigned int blue, + unsigned int trans, struct fb_info *info) +{ + struct mmpfb_info *fbi = info->par; + u32 val; + + if (info->fix.visual == FB_VISUAL_TRUECOLOR && regno < 16) { + val = chan_to_field(red, &info->var.red); + val |= chan_to_field(green, &info->var.green); + val |= chan_to_field(blue , &info->var.blue); + fbi->pseudo_palette[regno] = val; + } + + if (info->fix.visual == FB_VISUAL_PSEUDOCOLOR && regno < 256) { + val = to_rgb(red, green, blue); + /* TODO */ + } + + return 0; +} + +static int mmpfb_pan_display(struct fb_var_screeninfo *var, + struct fb_info *info) +{ + struct mmpfb_info *fbi = info->par; + struct mmp_addr addr; + + memset(&addr, 0, sizeof(addr)); + addr.phys[0] = (var->yoffset * var->xres_virtual + var->xoffset) + * var->bits_per_pixel / 8 + fbi->fb_start_dma; + mmp_overlay_set_addr(fbi->overlay, &addr); + + return 0; +} + +static int var_update(struct fb_info *info) +{ + struct mmpfb_info *fbi = info->par; + struct fb_var_screeninfo *var = &info->var; + struct fb_videomode *m; + int pix_fmt; + + /* set pix_fmt */ + pix_fmt = var_to_pixfmt(var); + if (pix_fmt < 0) + return -EINVAL; + pixfmt_to_var(var, pix_fmt); + fbi->pix_fmt = pix_fmt; + + /* set var according to best video mode*/ + m = (struct fb_videomode *)fb_match_mode(var, &info->modelist); + if (!m) { + dev_err(fbi->dev, "set par: no match mode, use best mode\n"); + m = (struct fb_videomode *)fb_find_best_mode(var, + &info->modelist); + fb_videomode_to_var(var, m); + } + memcpy(&fbi->mode, m, sizeof(struct fb_videomode)); + + /* fix to 2* yres */ + var->yres_virtual = var->yres * 2; + info->fix.visual = (pix_fmt == PIXFMT_PSEUDOCOLOR) ? + FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR; + info->fix.line_length = var->xres_virtual * var->bits_per_pixel / 8; + info->fix.ypanstep = var->yres; + return 0; +} + +static int mmpfb_set_par(struct fb_info *info) +{ + struct mmpfb_info *fbi = info->par; + struct fb_var_screeninfo *var = &info->var; + struct mmp_addr addr; + struct mmp_win win; + struct mmp_mode mode; + int ret; + + ret = var_update(info); + if (ret != 0) + return ret; + + /* set window/path according to new videomode */ + fbmode_to_mmpmode(&mode, &fbi->mode, fbi->output_fmt); + mmp_path_set_mode(fbi->path, &mode); + + memset(&win, 0, sizeof(win)); + win.xsrc = win.xdst = fbi->mode.xres; + win.ysrc = win.ydst = fbi->mode.yres; + win.pix_fmt = fbi->pix_fmt; + mmp_overlay_set_win(fbi->overlay, &win); + + /* set address always */ + memset(&addr, 0, sizeof(addr)); + addr.phys[0] = (var->yoffset * var->xres_virtual + var->xoffset) + * var->bits_per_pixel / 8 + fbi->fb_start_dma; + mmp_overlay_set_addr(fbi->overlay, &addr); + + return 0; +} + +static void mmpfb_power(struct mmpfb_info *fbi, int power) +{ + struct mmp_addr addr; + struct mmp_win win; + struct fb_var_screeninfo *var = &fbi->fb_info->var; + + /* for power on, always set address/window again */ + if (power) { + memset(&win, 0, sizeof(win)); + win.xsrc = win.xdst = fbi->mode.xres; + win.ysrc = win.ydst = fbi->mode.yres; + win.pix_fmt = fbi->pix_fmt; + mmp_overlay_set_win(fbi->overlay, &win); + + /* set address always */ + memset(&addr, 0, sizeof(addr)); + addr.phys[0] = fbi->fb_start_dma + + (var->yoffset * var->xres_virtual + var->xoffset) + * var->bits_per_pixel / 8; + mmp_overlay_set_addr(fbi->overlay, &addr); + } + mmp_overlay_set_onoff(fbi->overlay, power); +} + +static int mmpfb_blank(int blank, struct fb_info *info) +{ + struct mmpfb_info *fbi = info->par; + + mmpfb_power(fbi, (blank == FB_BLANK_UNBLANK)); + + return 0; +} + +static struct fb_ops mmpfb_ops = { + .owner = THIS_MODULE, + .fb_blank = mmpfb_blank, + .fb_check_var = mmpfb_check_var, + .fb_set_par = mmpfb_set_par, + .fb_setcolreg = mmpfb_setcolreg, + .fb_pan_display = mmpfb_pan_display, + .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 = kzalloc(sizeof(struct fb_videomode) * videomode_num, + GFP_KERNEL); + if (!videomodes) { + dev_err(fbi->dev, "can't malloc video modes\n"); + 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_base = 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 = 0; + struct mmpfb_info *fbi = 0; + 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; + if (!fbi) { + ret = -EINVAL; + goto failed; + } + + /* 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; + } + memset(fbi->fb_start, 0, fbi->fb_size); + 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); +failed: + dev_err(fbi->dev, "mmp-fb: frame buffer device init failed\n"); + platform_set_drvdata(pdev, NULL); + + framebuffer_release(info); + + return ret; +} + +static struct platform_driver mmpfb_driver = { + .driver = { + .name = "mmp-fb", + .owner = THIS_MODULE, + }, + .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"); |