> This patch adds framebuffer support to the Freescale i.MX SoCs
> equipped with an IPU v3, so far these are the i.MX50/51/53.
>
> This driver has been tested on the i.MX51 babbage board with
> both DVI and analog VGA in different resolutions and color depths.
> It has also been tested on a custom i.MX51 board using a fixed
> resolution panel.
>
> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> ---
> drivers/video/Kconfig | 11 +
> drivers/video/Makefile | 1 +
> drivers/video/mx5fb.c | 846 ++++++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 858 insertions(+), 0 deletions(-)
> create mode 100644 drivers/video/mx5fb.c
>
> diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
> index 27c1fb4..1901915 100644
> --- a/drivers/video/Kconfig
> +++ b/drivers/video/Kconfig
> @@ -2236,6 +2236,17 @@ config FB_MX3
> far only synchronous displays are supported. If you plan to use
> an LCD display with your i.MX31 system, say Y here.
>
> +config FB_MX5
> + tristate "MX5 Framebuffer support"
> + depends on FB && MFD_IMX_IPU_V3
> + select FB_CFB_FILLRECT
> + select FB_CFB_COPYAREA
> + select FB_CFB_IMAGEBLIT
> + select FB_MODE_HELPERS
> + help
> + This is a framebuffer device for the i.MX51 LCD Controller. If you
> + plan to use an LCD display with your i.MX51 system, say Y here.
> +
> config FB_BROADSHEET
> tristate "E-Ink Broadsheet/Epson S1D13521 controller support"
> depends on FB
> diff --git a/drivers/video/Makefile b/drivers/video/Makefile
> index 485e8ed..ad408d2 100644
> --- a/drivers/video/Makefile
> +++ b/drivers/video/Makefile
> @@ -145,6 +145,7 @@ obj-$(CONFIG_FB_BF54X_LQ043) += bf54x-lq043fb.o
> obj-$(CONFIG_FB_BFIN_LQ035Q1) += bfin-lq035q1-fb.o
> obj-$(CONFIG_FB_BFIN_T350MCQB) += bfin-t350mcqb-fb.o
> obj-$(CONFIG_FB_MX3) += mx3fb.o
> +obj-$(CONFIG_FB_MX5) += mx5fb.o
> obj-$(CONFIG_FB_DA8XX) += da8xx-fb.o
>
> # the test framebuffer is last
> diff --git a/drivers/video/mx5fb.c b/drivers/video/mx5fb.c
> new file mode 100644
> index 0000000..fd9baf4
> --- /dev/null
> +++ b/drivers/video/mx5fb.c
> @@ -0,0 +1,846 @@
> +/*
> + * Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved.
> + *
> + * The code contained herein is licensed under the GNU General Public
> + * License. You may obtain a copy of the GNU General Public License
> + * Version 2 or later at the following locations:
> + *
> + *
http://www.opensource.org/licenses/gpl-license.html
> + *
http://www.gnu.org/copyleft/gpl.html
> + *
> + * Framebuffer Framebuffer Driver for SDC and ADC.
> + */
> +
> +#include <linux/module.h>
> +#include <linux/kernel.h>
> +#include <linux/platform_device.h>
> +#include <linux/errno.h>
> +#include <linux/string.h>
> +#include <linux/interrupt.h>
> +#include <linux/slab.h>
> +#include <linux/fb.h>
> +#include <linux/delay.h>
> +#include <linux/init.h>
> +#include <linux/dma-mapping.h>
> +#include <linux/console.h>
> +#include <linux/mfd/imx-ipu-v3.h>
> +#include <asm/uaccess.h>
> +#include <mach/ipu-v3.h>
> +
> +#define DRIVER_NAME "imx-ipuv3-fb"
> +
> +struct imx_ipu_fb_info {
> + int ipu_channel_num;
> + struct ipu_channel *ipu_ch;
> + int dc;
> + int ipu_di;
> + u32 ipu_di_pix_fmt;
> + u32 ipu_in_pix_fmt;
> +
> + u32 pseudo_palette[16];
> +
> + struct ipu_dp *dp;
> + struct dmfc_channel *dmfc;
> + struct fb_info *slave;
> + struct fb_info *master;
> + bool enabled;
> +};
> +
> +static int imx_ipu_fb_set_fix(struct fb_info *info)
> +{
> + struct fb_fix_screeninfo *fix = &info->fix;
> + struct fb_var_screeninfo *var = &info->var;
> +
> + fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
> +
> + fix->type = FB_TYPE_PACKED_PIXELS;
> + fix->accel = FB_ACCEL_NONE;
> + fix->visual = FB_VISUAL_TRUECOLOR;
> + fix->xpanstep = 1;
> + fix->ypanstep = 1;
> +
> + return 0;
> +}
> +
> +static int imx_ipu_fb_map_video_memory(struct fb_info *fbi)
> +{
> + int size;
> +
> + size = fbi->var.yres_virtual * fbi->fix.line_length;
> +
> + if (fbi->screen_base) {
> + if (fbi->fix.smem_len >= size)
> + return 0;
> +
> + dma_free_writecombine(fbi->device, fbi->fix.smem_len,
> + fbi->screen_base, fbi->fix.smem_start);
> + }
> +
> + fbi->screen_base = dma_alloc_writecombine(fbi->device,
> + size,
> + (dma_addr_t *)&fbi->fix.smem_start,
> + GFP_DMA);
> + if (fbi->screen_base == 0) {
> + dev_err(fbi->device, "Unable to allocate framebuffer memory (%d)\n",
> + fbi->fix.smem_len);
> + fbi->fix.smem_len = 0;
> + fbi->fix.smem_start = 0;
> + return -ENOMEM;
> + }
> +
> + fbi->fix.smem_len = size;
> + fbi->screen_size = fbi->fix.smem_len;
> +
> + dev_dbg(fbi->device, "allocated fb @ paddr=0x%08lx, size=%d\n",
> + fbi->fix.smem_start, fbi->fix.smem_len);
> +
> + /* Clear the screen */
> + memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);
> +
> + return 0;
> +}
> +
> +static void imx_ipu_fb_enable(struct fb_info *fbi)
> +{
> + struct imx_ipu_fb_info *mxc_fbi = fbi->par;
> +
> + if (mxc_fbi->enabled)
> + return;
> +
> + ipu_di_enable(mxc_fbi->ipu_di);
> + ipu_dmfc_enable_channel(mxc_fbi->dmfc);
> + ipu_idmac_enable_channel(mxc_fbi->ipu_ch);
> + ipu_dc_enable_channel(mxc_fbi->dc);
> + ipu_dp_enable_channel(mxc_fbi->dp);
> + mxc_fbi->enabled = 1;
> +}
> +
> +static void imx_ipu_fb_disable(struct fb_info *fbi)
> +{
> + struct imx_ipu_fb_info *mxc_fbi = fbi->par;
> +
> + if (!mxc_fbi->enabled)
> + return;
> +
> + ipu_dp_disable_channel(mxc_fbi->dp);
> + ipu_dc_disable_channel(mxc_fbi->dc);
> + ipu_idmac_disable_channel(mxc_fbi->ipu_ch);
> + ipu_dmfc_disable_channel(mxc_fbi->dmfc);
> + ipu_di_disable(mxc_fbi->ipu_di);
> +
> + mxc_fbi->enabled = 0;
> +}
> +
> +static int calc_vref(struct fb_var_screeninfo *var)
> +{
> + unsigned long htotal, vtotal;
> +
> + htotal = var->xres + var->right_margin + var->hsync_len + var->left_margin;
> + vtotal = var->yres + var->lower_margin + var->vsync_len + var->upper_margin;
> +
> + if (!htotal || !vtotal)
> + return 60;
> +
> + return PICOS2KHZ(var->pixclock) * 1000 / vtotal / htotal;
> +}
> +
> +static int calc_bandwidth(struct fb_var_screeninfo *var, unsigned int vref)
> +{
> + return var->xres * var->yres * vref;
> +}
> +
> +static int imx_ipu_fb_set_par(struct fb_info *fbi)
> +{
> + int ret;
> + struct ipu_di_signal_cfg sig_cfg;
> + struct imx_ipu_fb_info *mxc_fbi = fbi->par;
> + u32 out_pixel_fmt;
> + int interlaced = 0;
> + struct fb_var_screeninfo *var = &fbi->var;
> + int enabled = mxc_fbi->enabled;
> +
> + dev_dbg(fbi->device, "Reconfiguring framebuffer %dx%d-%d\n",
> + fbi->var.xres, fbi->var.yres, fbi->var.bits_per_pixel);
> +
> + if (enabled)
> + imx_ipu_fb_disable(fbi);
> +
> + fbi->fix.line_length = var->xres_virtual * var->bits_per_pixel / 8;
> +
> + var->yres_virtual = var->yres;
> +
> + ret = imx_ipu_fb_map_video_memory(fbi);
> + if (ret)
> + return ret;
> +
> + if (var->vmode & FB_VMODE_INTERLACED)
> + interlaced = 1;
> +
> + memset(&sig_cfg, 0, sizeof(sig_cfg));
> + out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
> +
> + if (var->vmode & FB_VMODE_INTERLACED)
> + sig_cfg.interlaced = 1;
> + if (var->vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
> + sig_cfg.odd_field_first = 1;
> + if (var->sync & FB_SYNC_EXT)
> + sig_cfg.ext_clk = 1;
> + if (var->sync & FB_SYNC_HOR_HIGH_ACT)
> + sig_cfg.Hsync_pol = 1;
> + if (var->sync & FB_SYNC_VERT_HIGH_ACT)
> + sig_cfg.Vsync_pol = 1;
> + if (!(var->sync & FB_SYNC_CLK_LAT_FALL))
> + sig_cfg.clk_pol = 1;
> + if (var->sync & FB_SYNC_DATA_INVERT)
> + sig_cfg.data_pol = 1;
> + if (!(var->sync & FB_SYNC_OE_LOW_ACT))
> + sig_cfg.enable_pol = 1;
> + if (var->sync & FB_SYNC_CLK_IDLE_EN)
> + sig_cfg.clkidle_en = 1;
> +
> + dev_dbg(fbi->device, "pixclock = %lu.%03lu MHz\n",
> + PICOS2KHZ(var->pixclock) / 1000,
> + PICOS2KHZ(var->pixclock) % 1000);
> +
> + sig_cfg.width = var->xres;
> + sig_cfg.height = var->yres;
> + sig_cfg.pixel_fmt = out_pixel_fmt;
> + sig_cfg.h_start_width = var->left_margin;
> + sig_cfg.h_sync_width = var->hsync_len;
> + sig_cfg.h_end_width = var->right_margin;
> + sig_cfg.v_start_width = var->upper_margin;
> + sig_cfg.v_sync_width = var->vsync_len;
> + sig_cfg.v_end_width = var->lower_margin;
> + sig_cfg.v_to_h_sync = 0;
> +
> + if (mxc_fbi->dp) {
> + ret = ipu_dp_setup_channel(mxc_fbi->dp, mxc_fbi->ipu_in_pix_fmt,
> + out_pixel_fmt, 1);
> + if (ret) {
> + dev_dbg(fbi->device, "initializing display processor failed with %d\n",
> + ret);
> + return ret;
> + }
> + }
> +
> + ret = ipu_dc_init_sync(mxc_fbi->dc, mxc_fbi->ipu_di, interlaced,
> + out_pixel_fmt, fbi->var.xres);
> + if (ret) {
> + dev_dbg(fbi->device, "initializing display controller failed with %d\n",
> + ret);
> + return ret;
> + }
> +
> + ret = ipu_di_init_sync_panel(mxc_fbi->ipu_di,
> + PICOS2KHZ(var->pixclock) * 1000UL,
> + &sig_cfg);
> + if (ret) {
> + dev_dbg(fbi->device, "initializing panel failed with %d\n",
> + ret);
> + return ret;
> + }
> +
> + fbi->mode = (struct fb_videomode *)fb_match_mode(var, &fbi->modelist);
> + var->xoffset = var->yoffset = 0;
> +
> + if (fbi->var.vmode & FB_VMODE_INTERLACED)
> + interlaced = 1;
> +
> + ret = ipu_idmac_init_channel_buffer(mxc_fbi->ipu_ch,
> + mxc_fbi->ipu_in_pix_fmt,
> + var->xres, var->yres,
> + fbi->fix.line_length,
> + IPU_ROTATE_NONE,
> + fbi->fix.smem_start,
> + 0,
> + 0, 0, interlaced);
> + if (ret) {
> + dev_dbg(fbi->device, "init channel buffer failed with %d\n",
> + ret);
> + return ret;
> + }
> +
> + ret = ipu_dmfc_init_channel(mxc_fbi->dmfc, var->xres);
> + if (ret) {
> + dev_dbg(fbi->device, "initializing dmfc channel failed with %d\n",
> + ret);
> + return ret;
> + }
> +
> + ret = ipu_dmfc_alloc_bandwidth(mxc_fbi->dmfc, calc_bandwidth(var, calc_vref(var)));
> + if (ret) {
> + dev_dbg(fbi->device, "allocating dmfc bandwidth failed with %d\n",
> + ret);
> + return ret;
> + }
> +
> + if (enabled)
> + imx_ipu_fb_enable(fbi);
> +
> + return ret;
> +}
> +
> +/*
> + * These are the bitfields for each
> + * display depth that we support.
> + */
> +struct imxfb_rgb {
> + struct fb_bitfield red;
> + struct fb_bitfield green;
> + struct fb_bitfield blue;
> + struct fb_bitfield transp;
> +};
> +
> +static struct imxfb_rgb def_rgb_8 = {
> + .red = { .offset = 5, .length = 3, },
> + .green = { .offset = 2, .length = 3, },
> + .blue = { .offset = 0, .length = 2, },
> + .transp = { .offset = 0, .length = 0, },
> +};
> +
> +static struct imxfb_rgb def_rgb_16 = {
> + .red = { .offset = 11, .length = 5, },
> + .green = { .offset = 5, .length = 6, },
> + .blue = { .offset = 0, .length = 5, },
> + .transp = { .offset = 0, .length = 0, },
> +};
> +
> +static struct imxfb_rgb def_rgb_24 = {
> + .red = { .offset = 16, .length = 8, },
> + .green = { .offset = 8, .length = 8, },
> + .blue = { .offset = 0, .length = 8, },
> + .transp = { .offset = 0, .length = 0, },
> +};
> +
> +static struct imxfb_rgb def_rgb_32 = {
> + .red = { .offset = 16, .length = 8, },
> + .green = { .offset = 8, .length = 8, },
> + .blue = { .offset = 0, .length = 8, },
> + .transp = { .offset = 24, .length = 8, },
> +};
> +
> +/*
> + * Check framebuffer variable parameters and adjust to valid values.
> + *
> + * @param var framebuffer variable parameters
> + *
> + * @param info framebuffer information pointer
> + */
> +static int imx_ipu_fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
> +{
> + struct imx_ipu_fb_info *mxc_fbi = info->par;
> + struct imxfb_rgb *rgb;
> +
> + /* we don't support xpan, force xres_virtual to be equal to xres */
> + var->xres_virtual = var->xres;
> +
> + if (var->yres_virtual < var->yres)
> + var->yres_virtual = var->yres;
> +
> + switch (var->bits_per_pixel) {
> + case 8:
> + rgb = &def_rgb_8;
> + break;
> + case 16:
> + rgb = &def_rgb_16;
> + mxc_fbi->ipu_in_pix_fmt = IPU_PIX_FMT_RGB565;
> + break;
> + case 24:
> + rgb = &def_rgb_24;
> + mxc_fbi->ipu_in_pix_fmt = IPU_PIX_FMT_BGR24;
> + break;
> + case 32:
> + rgb = &def_rgb_32;
> + mxc_fbi->ipu_in_pix_fmt = IPU_PIX_FMT_BGR32;
> + break;
> + default:
> + var->bits_per_pixel = 24;
> + rgb = &def_rgb_24;
> + mxc_fbi->ipu_in_pix_fmt = IPU_PIX_FMT_BGR24;
> + }
> +
> + var->red = rgb->red;
> + var->green = rgb->green;
> + var->blue = rgb->blue;
> + var->transp = rgb->transp;
> +
> + return 0;
> +}
> +
> +static inline unsigned int chan_to_field(u_int chan, struct fb_bitfield *bf)
> +{
> + chan &= 0xffff;
> + chan >>= 16 - bf->length;
> + return chan << bf->offset;
> +}
> +
> +static int imx_ipu_fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
> + u_int trans, struct fb_info *fbi)
> +{
> + unsigned int val;
> + int ret = 1;
> +
> + /*
> + * If greyscale is true, then we convert the RGB value
> + * to greyscale no matter what visual we are using.
> + */
> + if (fbi->var.grayscale)
> + red = green = blue = (19595 * red + 38470 * green +
> + 7471 * blue) >> 16;
> + switch (fbi->fix.visual) {
> + case FB_VISUAL_TRUECOLOR:
> + /*
> + * 16-bit True Colour. We encode the RGB value
> + * according to the RGB bitfield information.
> + */
> + if (regno < 16) {
> + u32 *pal = fbi->pseudo_palette;
> +
> + val = chan_to_field(red, &fbi->var.red);
> + val |= chan_to_field(green, &fbi->var.green);
> + val |= chan_to_field(blue, &fbi->var.blue);
> +
> + pal[regno] = val;
> + ret = 0;
> + }
> + break;
> +
> + case FB_VISUAL_STATIC_PSEUDOCOLOR:
> + case FB_VISUAL_PSEUDOCOLOR:
> + break;
> + }
> +
> + return ret;
> +}
> +
> +static int imx_ipu_fb_blank(int blank, struct fb_info *info)
> +{
> + dev_dbg(info->device, "blank = %d\n", blank);
> +
> + switch (blank) {
> + case FB_BLANK_POWERDOWN:
> + case FB_BLANK_VSYNC_SUSPEND:
> + case FB_BLANK_HSYNC_SUSPEND:
> + case FB_BLANK_NORMAL:
> + imx_ipu_fb_disable(info);
> + break;
> + case FB_BLANK_UNBLANK:
> + imx_ipu_fb_enable(info);
> + break;
> + }
> +
> + return 0;
> +}
> +
> +static int imx_ipu_fb_pan_display(struct fb_var_screeninfo *var,
> + struct fb_info *info)
> +{
> + struct imx_ipu_fb_info *mxc_fbi = info->par;
> + unsigned long base;
> + int ret;
> +
> + if (info->var.yoffset == var->yoffset)
> + return 0; /* No change, do nothing */
> +
> + base = var->yoffset * var->xres_virtual * var->bits_per_pixel / 8;
> + base += info->fix.smem_start;
> +
> + ret = ipu_wait_for_interrupt(IPU_IRQ_EOF(mxc_fbi->ipu_channel_num), 100);
> + if (ret)
> + return ret;
> +
> + if (ipu_idmac_update_channel_buffer(mxc_fbi->ipu_ch, 0, base)) {
> + dev_err(info->device,
> + "Error updating SDC buf to address=0x%08lX\n", base);
> + }
> +
> + info->var.yoffset = var->yoffset;
> +
> + return 0;
> +}
> +
> +static struct fb_ops imx_ipu_fb_ops = {
> + .owner = THIS_MODULE,
> + .fb_set_par = imx_ipu_fb_set_par,
> + .fb_check_var = imx_ipu_fb_check_var,
> + .fb_setcolreg = imx_ipu_fb_setcolreg,
> + .fb_pan_display = imx_ipu_fb_pan_display,
> + .fb_fillrect = cfb_fillrect,
> + .fb_copyarea = cfb_copyarea,
> + .fb_imageblit = cfb_imageblit,
> + .fb_blank = imx_ipu_fb_blank,
> +};
> +
> +/*
> + * Overlay functions
> + */
> +static int imx_ipu_fb_enable_overlay(struct fb_info *fbi)
> +{
> + struct imx_ipu_fb_info *mxc_fbi = fbi->par;
> +
> + ipu_dmfc_enable_channel(mxc_fbi->dmfc);
> + ipu_idmac_enable_channel(mxc_fbi->ipu_ch);
> + ipu_dp_enable_fg(mxc_fbi->dp);
> +
> + return 0;
> +}
> +
> +static int imx_ipu_fb_disable_overlay(struct fb_info *fbi)
> +{
> + struct imx_ipu_fb_info *mxc_fbi = fbi->par;
> +
> + ipu_dp_disable_fg(mxc_fbi->dp);
> + ipu_idmac_disable_channel(mxc_fbi->ipu_ch);
> + ipu_dmfc_disable_channel(mxc_fbi->dmfc);
> +
> + return 0;
> +}
> +
> +static int imx_ipu_fb_set_par_overlay(struct fb_info *fbi)
> +{
> + struct imx_ipu_fb_info *mxc_fbi = fbi->par;
> + struct fb_var_screeninfo *var = &fbi->var;
> + struct fb_info *fbi_master = mxc_fbi->master;
> + struct fb_var_screeninfo *var_master = &fbi_master->var;
> + int ret;
> + int interlaced = 0;
> + int enabled = mxc_fbi->enabled;
> +
> + dev_dbg(fbi->device, "Reconfiguring framebuffer %dx%d-%d\n",
> + fbi->var.xres, fbi->var.yres, fbi->var.bits_per_pixel);
> +
> + if (enabled)
> + imx_ipu_fb_disable_overlay(fbi);
> +
> + fbi->fix.line_length = var->xres_virtual *
> + var->bits_per_pixel / 8;
> +
> + ret = imx_ipu_fb_map_video_memory(fbi);
> + if (ret)
> + return ret;
> +
> + ipu_dp_set_window_pos(mxc_fbi->dp, 64, 64);
> +
> + var->xoffset = var->yoffset = 0;
> +
> + if (var->vmode & FB_VMODE_INTERLACED)
> + interlaced = 1;
> +
> + ret = ipu_idmac_init_channel_buffer(mxc_fbi->ipu_ch,
> + mxc_fbi->ipu_in_pix_fmt,
> + var->xres, var->yres,
> + fbi->fix.line_length,
> + IPU_ROTATE_NONE,
> + fbi->fix.smem_start,
> + 0,
> + 0, 0, interlaced);
> + if (ret) {
> + dev_dbg(fbi->device, "init channel buffer failed with %d\n",
> + ret);
> + return ret;
> + }
> +
> + ret = ipu_dmfc_init_channel(mxc_fbi->dmfc, var->xres);
> + if (ret) {
> + dev_dbg(fbi->device, "initializing dmfc channel failed with %d\n",
> + ret);
> + return ret;
> + }
> +
> + ret = ipu_dmfc_alloc_bandwidth(mxc_fbi->dmfc, calc_bandwidth(var, calc_vref(var_master)));
> + if (ret) {
> + dev_dbg(fbi->device, "allocating dmfc bandwidth failed with %d\n",
> + ret);
> + return ret;
> + }
> +
> + if (enabled)
> + imx_ipu_fb_enable_overlay(fbi);
> +
> + return ret;
> +}
> +
> +static int imx_ipu_fb_blank_overlay(int blank, struct fb_info *fbi)
> +{
> + dev_dbg(fbi->device, "blank = %d\n", blank);
> +
> + switch (blank) {
> + case FB_BLANK_POWERDOWN:
> + case FB_BLANK_VSYNC_SUSPEND:
> + case FB_BLANK_HSYNC_SUSPEND:
> + case FB_BLANK_NORMAL:
> + imx_ipu_fb_disable_overlay(fbi);
> + break;
> + case FB_BLANK_UNBLANK:
> + imx_ipu_fb_enable_overlay(fbi);
> + break;
> + }
> +
> + return 0;
> +}
> +
> +static struct fb_ops imx_ipu_fb_overlay_ops = {
> + .owner = THIS_MODULE,
> + .fb_set_par = imx_ipu_fb_set_par_overlay,
> + .fb_check_var = imx_ipu_fb_check_var,
> + .fb_setcolreg = imx_ipu_fb_setcolreg,
> + .fb_pan_display = imx_ipu_fb_pan_display,
> + .fb_fillrect = cfb_fillrect,
> + .fb_copyarea = cfb_copyarea,
> + .fb_imageblit = cfb_imageblit,
> + .fb_blank = imx_ipu_fb_blank_overlay,
> +};
> +
> +static struct fb_info *imx_ipu_fb_init_fbinfo(struct device *dev, struct fb_ops *ops)
> +{
> + struct fb_info *fbi;
> + struct imx_ipu_fb_info *mxc_fbi;
> +
> + fbi = framebuffer_alloc(sizeof(struct imx_ipu_fb_info), dev);
> + if (!fbi)
> + return NULL;
> +
> + BUG_ON(fbi->par == NULL);
> + mxc_fbi = fbi->par;
> +
> + fbi->var.activate = FB_ACTIVATE_NOW;
> +
> + fbi->fbops = ops;
> + fbi->flags = FBINFO_FLAG_DEFAULT;
> + fbi->pseudo_palette = mxc_fbi->pseudo_palette;
> +
> + fb_alloc_cmap(&fbi->cmap, 16, 0);
> +
> + return fbi;
> +}
> +
> +static int imx_ipu_fb_init_overlay(struct platform_device *pdev,
> + struct fb_info *fbi_master, int ipu_channel)
> +{
> + struct imx_ipu_fb_info *mxc_fbi_master = fbi_master->par;
> + struct fb_info *ovlfbi;
> + struct imx_ipu_fb_info *ovl_mxc_fbi;
> + int ret;
> +
> + ovlfbi = imx_ipu_fb_init_fbinfo(&pdev->dev, &imx_ipu_fb_overlay_ops);
> + if (!ovlfbi)
> + return -ENOMEM;
> +
> + ovl_mxc_fbi = ovlfbi->par;
> + ovl_mxc_fbi->ipu_ch = ipu_idmac_get(ipu_channel);
> + ovl_mxc_fbi->dmfc = ipu_dmfc_get(ipu_channel);
> + ovl_mxc_fbi->ipu_di = -1;
> + ovl_mxc_fbi->dp = mxc_fbi_master->dp;
> + ovl_mxc_fbi->master = fbi_master;
> + mxc_fbi_master->slave = ovlfbi;
> +
> + ovlfbi->var.xres = 240;
> + ovlfbi->var.yres = 320;
> + ovlfbi->var.yres_virtual = ovlfbi->var.yres;
> + ovlfbi->var.xres_virtual = ovlfbi->var.xres;
> + imx_ipu_fb_check_var(&ovlfbi->var, ovlfbi);
> + imx_ipu_fb_set_fix(ovlfbi);
> +
> + ret = register_framebuffer(ovlfbi);
> + if (ret) {
> + framebuffer_release(ovlfbi);
> + return ret;
> + }
> +
> + ipu_dp_set_global_alpha(ovl_mxc_fbi->dp, 1, 0x80, 1);
> + ipu_dp_set_color_key(ovl_mxc_fbi->dp, 0, 0);
> +
> + imx_ipu_fb_set_par_overlay(ovlfbi);
> +
> + return 0;
> +}
> +
> +static void imx_ipu_fb_exit_overlay(struct platform_device *pdev,
> + struct fb_info *fbi_master, int ipu_channel)
> +{
> + struct imx_ipu_fb_info *mxc_fbi_master = fbi_master->par;
> + struct fb_info *ovlfbi = mxc_fbi_master->slave;
> + struct imx_ipu_fb_info *ovl_mxc_fbi = ovlfbi->par;
> +
> + imx_ipu_fb_blank_overlay(FB_BLANK_POWERDOWN, ovlfbi);
> +
> + unregister_framebuffer(ovlfbi);
> +
> + ipu_idmac_put(ovl_mxc_fbi->ipu_ch);
> + ipu_dmfc_free_bandwidth(ovl_mxc_fbi->dmfc);
> + ipu_dmfc_put(ovl_mxc_fbi->dmfc);
> +
> + framebuffer_release(ovlfbi);
> +}
> +
> +static int imx_ipu_fb_find_mode(struct fb_info *fbi)
> +{
> + int ret;
> + struct fb_videomode *mode_array;
> + struct fb_modelist *modelist;
> + struct fb_var_screeninfo *var = &fbi->var;
> + int i = 0;
> +
> + list_for_each_entry(modelist, &fbi->modelist, list)
> + i++;
> +
> + mode_array = kmalloc(sizeof (struct fb_modelist) * i, GFP_KERNEL);
> + if (!mode_array)
> + return -ENOMEM;
> +
> + i = 0;
> + list_for_each_entry(modelist, &fbi->modelist, list)
> + mode_array[i++] = modelist->mode;
> +
> + ret = fb_find_mode(&fbi->var, fbi, NULL, mode_array, i, NULL, 16);
> + if (ret == 0)
> + return -EINVAL;
> +
> + dev_dbg(fbi->device, "found %dx%d-%d hs:%d:%d:%d vs:%d:%d:%d\n",
> + var->xres, var->yres, var->bits_per_pixel,
> + var->hsync_len, var->left_margin, var->right_margin,
> + var->vsync_len, var->upper_margin, var->lower_margin);
> +
> + kfree(mode_array);
> +
> + return 0;
> +}
> +
> +static int __devinit imx_ipu_fb_probe(struct platform_device *pdev)
> +{
> + struct fb_info *fbi;
> + struct imx_ipu_fb_info *mxc_fbi;
> + struct ipuv3_fb_platform_data *plat_data = pdev->dev.platform_data;
> + int ret = 0, i;
> +
> + pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
> +
> + fbi = imx_ipu_fb_init_fbinfo(&pdev->dev, &imx_ipu_fb_ops);
> + if (!fbi)
> + return -ENOMEM;
> +
> + mxc_fbi = fbi->par;
> +
> + mxc_fbi->ipu_channel_num = plat_data->ipu_channel_bg;
> + mxc_fbi->dc = plat_data->dc_channel;
> + mxc_fbi->ipu_di_pix_fmt = plat_data->interface_pix_fmt;
> + mxc_fbi->ipu_di = pdev->id;
> +
> + mxc_fbi->ipu_ch = ipu_idmac_get(plat_data->ipu_channel_bg);
> + if (IS_ERR(mxc_fbi->ipu_ch)) {
> + ret = PTR_ERR(mxc_fbi->ipu_ch);
> + goto failed_request_ipu;
> + }
> +
> + mxc_fbi->dmfc = ipu_dmfc_get(plat_data->ipu_channel_bg);
> + if (IS_ERR(mxc_fbi->ipu_ch)) {
> + ret = PTR_ERR(mxc_fbi->ipu_ch);
> + goto failed_request_dmfc;
> + }
> +
> + if (plat_data->dp_channel >= 0) {
> + mxc_fbi->dp = ipu_dp_get(plat_data->dp_channel);
> + if (IS_ERR(mxc_fbi->dp)) {
> + ret = PTR_ERR(mxc_fbi->ipu_ch);
> + goto failed_request_dp;
> + }
> + }
> +
> + fbi->var.yres_virtual = fbi->var.yres;
> +
> + INIT_LIST_HEAD(&fbi->modelist);
> + for (i = 0; i < plat_data->num_modes; i++)
> + fb_add_videomode(&plat_data->modes[i], &fbi->modelist);
> +
> + if (plat_data->flags & IMX_IPU_FB_USE_MODEDB) {
> + for (i = 0; i < num_fb_modes; i++)
> + fb_add_videomode(&fb_modes[i], &fbi->modelist);
> + }
> +
> + imx_ipu_fb_find_mode(fbi);
> +
> + imx_ipu_fb_check_var(&fbi->var, fbi);
> + imx_ipu_fb_set_fix(fbi);
> + ret = register_framebuffer(fbi);
> + if (ret < 0)
> + goto failed_register;
> +
> + imx_ipu_fb_set_par(fbi);
> + imx_ipu_fb_blank(FB_BLANK_UNBLANK, fbi);
> +
> + if (plat_data->ipu_channel_fg >= 0 && plat_data->flags & IMX_IPU_FB_USE_OVERLAY)
> + imx_ipu_fb_init_overlay(pdev, fbi, plat_data->ipu_channel_fg);
> +
> + platform_set_drvdata(pdev, fbi);
> +
> + return 0;
> +
> +failed_register:
> + if (plat_data->dp_channel >= 0)
> + ipu_dp_put(mxc_fbi->dp);
> +failed_request_dp:
> + ipu_dmfc_put(mxc_fbi->dmfc);
> +failed_request_dmfc:
> + ipu_idmac_put(mxc_fbi->ipu_ch);
> +failed_request_ipu:
> + fb_dealloc_cmap(&fbi->cmap);
> + framebuffer_release(fbi);
> +
> + return ret;
> +}
> +
> +static int __devexit imx_ipu_fb_remove(struct platform_device *pdev)
> +{
> + struct fb_info *fbi = platform_get_drvdata(pdev);
> + struct imx_ipu_fb_info *mxc_fbi = fbi->par;
> + struct ipuv3_fb_platform_data *plat_data = pdev->dev.platform_data;
> +
> + if (plat_data->ipu_channel_fg >= 0 && plat_data->flags & IMX_IPU_FB_USE_OVERLAY)
> + imx_ipu_fb_exit_overlay(pdev, fbi, plat_data->ipu_channel_fg);
> +
> + imx_ipu_fb_blank(FB_BLANK_POWERDOWN, fbi);
> +
> + dma_free_writecombine(fbi->device, fbi->fix.smem_len,
> + fbi->screen_base, fbi->fix.smem_start);
> +
> + if (&fbi->cmap)
> + fb_dealloc_cmap(&fbi->cmap);
> +
> + unregister_framebuffer(fbi);
> +
> + if (plat_data->dp_channel >= 0)
> + ipu_dp_put(mxc_fbi->dp);
> + ipu_dmfc_free_bandwidth(mxc_fbi->dmfc);
> + ipu_dmfc_put(mxc_fbi->dmfc);
> + ipu_idmac_put(mxc_fbi->ipu_ch);
> +
> + framebuffer_release(fbi);
> +
> + return 0;
> +}
> +
> +static struct platform_driver imx_ipu_fb_driver = {
> + .driver = {
> + .name = DRIVER_NAME,
> + },
> + .probe = imx_ipu_fb_probe,
> + .remove = __devexit_p(imx_ipu_fb_remove),
> +};
> +
> +static int __init imx_ipu_fb_init(void)
> +{
> + return platform_driver_register(&imx_ipu_fb_driver);
> +}
> +
> +static void __exit imx_ipu_fb_exit(void)
> +{
> + platform_driver_unregister(&imx_ipu_fb_driver);
> +}
> +
> +module_init(imx_ipu_fb_init);
> +module_exit(imx_ipu_fb_exit);
> +
> +MODULE_AUTHOR("Freescale Semiconductor, Inc.");
> +MODULE_DESCRIPTION("i.MX framebuffer driver");
> +MODULE_LICENSE("GPL");
> +MODULE_SUPPORTED_DEVICE("fb");
> --
> 1.7.2.3
>
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