[PATCH 3/7] Add i.MX5 framebuffer driver

From: Sascha Hauer
Date: Wed Feb 16 2011 - 09:11:26 EST

This patch adds framebuffer support to the Freescale i.MX SoCs
equipped with an IPU v3, so far these are the i.MX51/53.

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@xxxxxxxxxxxxxx>
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: linux-fbdev@xxxxxxxxxxxxxxx
Cc: Paul Mundt <lethal@xxxxxxxxxxxx>
Cc: Samuel Ortiz <sameo@xxxxxxxxxxxxxxx>
---
drivers/video/Kconfig | 11 +
drivers/video/Makefile | 1 +
drivers/video/mx5fb.c | 925 ++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 937 insertions(+), 0 deletions(-)
create mode 100644 drivers/video/mx5fb.c

diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index ffdb37a..70f8490 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -2344,6 +2344,17 @@ 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 f4921ab..64f6913 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -152,6 +152,7 @@ obj-$(CONFIG_FB_BFIN_LQ035Q1) += bfin-lq035q1-fb.o
obj-$(CONFIG_FB_BFIN_T350MCQB) += bfin-t350mcqb-fb.o
obj-$(CONFIG_FB_BFIN_7393) += bfin_adv7393fb.o
obj-$(CONFIG_FB_MX3) += mx3fb.o
+obj-$(CONFIG_FB_MX5) += mx5fb.o
obj-$(CONFIG_FB_DA8XX) += da8xx-fb.o
obj-$(CONFIG_MFD_IMX_IPU_V3) += imx-ipu-v3/

diff --git a/drivers/video/mx5fb.c b/drivers/video/mx5fb.c
new file mode 100644
index 0000000..af11f86
--- /dev/null
+++ b/drivers/video/mx5fb.c
@@ -0,0 +1,925 @@
+/*
+ * 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
+ */
+
+#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 di_no;
+ u32 ipu_di_pix_fmt;
+ u32 ipu_in_pix_fmt;
+
+ u32 pseudo_palette[16];
+
+ struct ipu_dp *dp;
+ struct dmfc_channel *dmfc;
+ struct ipu_di *di;
+ struct fb_info *slave;
+ struct fb_info *master;
+ bool enabled;
+
+ /* overlay specific fields */
+ int ovlxres, ovlyres;
+ int usage;
+};
+
+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;
+ else
+ return -ENOMEM;
+ }
+
+ 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->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->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;
+
+ 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->di_no, 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->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 void imx_ipu_fb_enable_overlay(struct fb_info *fbi);
+static void imx_ipu_fb_disable_overlay(struct fb_info *fbi);
+
+static int imx_ipu_fb_blank(int blank, struct fb_info *info)
+{
+ struct imx_ipu_fb_info *mxc_fbi = info->par;
+
+ 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:
+ if (mxc_fbi->slave)
+ imx_ipu_fb_disable_overlay(mxc_fbi->slave);
+ imx_ipu_fb_disable(info);
+ break;
+ case FB_BLANK_UNBLANK:
+ imx_ipu_fb_enable(info);
+ if (mxc_fbi->slave)
+ imx_ipu_fb_enable_overlay(mxc_fbi->slave);
+ 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 void imx_ipu_fb_enable_overlay(struct fb_info *ovl)
+{
+ struct imx_ipu_fb_info *mxc_ovl = ovl->par;
+
+ if (mxc_ovl->enabled)
+ return;
+
+ ipu_dmfc_enable_channel(mxc_ovl->dmfc);
+ ipu_idmac_enable_channel(mxc_ovl->ipu_ch);
+ ipu_dp_enable_fg(mxc_ovl->dp);
+ mxc_ovl->enabled = 1;
+}
+
+static void imx_ipu_fb_disable_overlay(struct fb_info *ovl)
+{
+ struct imx_ipu_fb_info *mxc_ovl = ovl->par;
+
+ if (!mxc_ovl->enabled)
+ return;
+
+ ipu_dp_disable_fg(mxc_ovl->dp);
+ ipu_wait_for_interrupt(451, 100);
+ ipu_idmac_disable_channel(mxc_ovl->ipu_ch);
+ ipu_dmfc_disable_channel(mxc_ovl->dmfc);
+ mxc_ovl->enabled = 0;
+}
+
+#define NONSTD_TO_XPOS(x) (((x) >> 0) & 0xfff)
+#define NONSTD_TO_YPOS(x) (((x) >> 12) & 0xfff)
+#define NONSTD_TO_ALPHA(x) (((x) >> 24) & 0xff)
+
+static int imx_ipu_fb_check_var_overlay(struct fb_var_screeninfo *var,
+ struct fb_info *ovl)
+{
+ struct imx_ipu_fb_info *mxc_ovl = ovl->par;
+ struct fb_info *fbi_master = mxc_ovl->master;
+ struct fb_var_screeninfo *var_master = &fbi_master->var;
+ int ret;
+ static int xpos, ypos;
+
+ xpos = NONSTD_TO_XPOS(var->nonstd);
+ ypos = NONSTD_TO_YPOS(var->nonstd);
+
+ ret = imx_ipu_fb_check_var(var, ovl);
+ if (ret)
+ return ret;
+
+ if (var->xres + xpos > var_master->xres)
+ return -EINVAL;
+ if (var->yres + ypos > var_master->yres)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int imx_ipu_fb_set_par_overlay(struct fb_info *ovl)
+{
+ struct imx_ipu_fb_info *mxc_ovl = ovl->par;
+ struct fb_var_screeninfo *var = &ovl->var;
+ struct fb_info *fbi_master = mxc_ovl->master;
+ struct imx_ipu_fb_info *mxc_fbi_master = fbi_master->par;
+ struct fb_var_screeninfo *var_master = &fbi_master->var;
+ int ret;
+ int interlaced = 0;
+ int xpos, ypos, alpha;
+ int resolution_change;
+
+ dev_dbg(ovl->device, "Reconfiguring framebuffer %dx%d-%d\n",
+ ovl->var.xres, ovl->var.yres, ovl->var.bits_per_pixel);
+
+ resolution_change = mxc_ovl->ovlxres != var->xres ||
+ mxc_ovl->ovlyres != var->yres;
+
+ if (mxc_ovl->enabled && resolution_change)
+ imx_ipu_fb_disable_overlay(ovl);
+
+ ovl->fix.line_length = var->xres_virtual *
+ var->bits_per_pixel / 8;
+
+ xpos = NONSTD_TO_XPOS(var->nonstd);
+ ypos = NONSTD_TO_YPOS(var->nonstd);
+ alpha = NONSTD_TO_ALPHA(var->nonstd);
+
+ if (resolution_change) {
+ ret = imx_ipu_fb_map_video_memory(ovl);
+ if (ret)
+ return ret;
+ }
+
+ if (!resolution_change && mxc_ovl->enabled)
+ ipu_wait_for_interrupt(IPU_IRQ_EOF(mxc_fbi_master->ipu_channel_num), 100);
+
+ ipu_dp_set_window_pos(mxc_ovl->dp, xpos, ypos);
+ ipu_dp_set_global_alpha(mxc_ovl->dp, 1, alpha, 1);
+
+ var->xoffset = var->yoffset = 0;
+
+ if (resolution_change) {
+ if (var->vmode & FB_VMODE_INTERLACED)
+ interlaced = 1;
+
+ ret = ipu_idmac_init_channel_buffer(mxc_ovl->ipu_ch,
+ mxc_ovl->ipu_in_pix_fmt,
+ var->xres, var->yres,
+ ovl->fix.line_length,
+ IPU_ROTATE_NONE,
+ ovl->fix.smem_start,
+ 0,
+ 0, 0, interlaced);
+ if (ret) {
+ dev_dbg(ovl->device, "init channel buffer failed with %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = ipu_dmfc_init_channel(mxc_ovl->dmfc, var->xres);
+ if (ret) {
+ dev_dbg(ovl->device, "initializing dmfc channel failed with %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = ipu_dmfc_alloc_bandwidth(mxc_ovl->dmfc, calc_bandwidth(var, calc_vref(var_master)));
+ if (ret) {
+ dev_dbg(ovl->device, "allocating dmfc bandwidth failed with %d\n",
+ ret);
+ return ret;
+ }
+ mxc_ovl->ovlxres = var->xres;
+ mxc_ovl->ovlyres = var->yres;
+ }
+
+ if (mxc_fbi_master->enabled)
+ imx_ipu_fb_enable_overlay(ovl);
+
+ return ret;
+}
+
+static int imx_overlayfb_open(struct fb_info *ovl, int user)
+{
+ struct imx_ipu_fb_info *mxc_ovl = ovl->par;
+
+ if (mxc_ovl->usage++ == 0)
+ printk("enable ovl\n");
+
+ return 0;
+}
+
+static int imx_overlayfb_release(struct fb_info *ovl, int user)
+{
+ struct imx_ipu_fb_info *mxc_ovl = ovl->par;
+
+ if (--mxc_ovl->usage == 0) {
+ printk("disable ovl\n");
+
+ if (ovl->screen_base)
+ dma_free_writecombine(ovl->device, ovl->fix.smem_len,
+ ovl->screen_base, ovl->fix.smem_start);
+ ovl->fix.smem_len = 0;
+ ovl->fix.smem_start = 0;
+ ovl->screen_base = NULL;
+ mxc_ovl->ovlxres = 0;
+ mxc_ovl->ovlyres = 0;
+ }
+
+ 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_overlay,
+ .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_open = imx_overlayfb_open,
+ .fb_release = imx_overlayfb_release,
+};
+
+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 *ovl;
+ struct imx_ipu_fb_info *mxc_ovl;
+ int ret;
+
+ ovl = imx_ipu_fb_init_fbinfo(&pdev->dev, &imx_ipu_fb_overlay_ops);
+ if (!ovl)
+ return -ENOMEM;
+
+ mxc_ovl = ovl->par;
+ mxc_ovl->ipu_ch = ipu_idmac_get(ipu_channel);
+ mxc_ovl->dmfc = ipu_dmfc_get(ipu_channel);
+ mxc_ovl->di = NULL;
+ mxc_ovl->dp = mxc_fbi_master->dp;
+ mxc_ovl->master = fbi_master;
+ mxc_fbi_master->slave = ovl;
+
+ imx_ipu_fb_check_var(&ovl->var, ovl);
+ imx_ipu_fb_set_fix(ovl);
+
+ ret = register_framebuffer(ovl);
+ if (ret) {
+ framebuffer_release(ovl);
+ return ret;
+ }
+
+ ipu_dp_set_global_alpha(mxc_ovl->dp, 0, 0, 1);
+ ipu_dp_set_color_key(mxc_ovl->dp, 1, 0x434343);
+
+ 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 *ovl = mxc_fbi_master->slave;
+ struct imx_ipu_fb_info *mxc_ovl = ovl->par;
+
+ if (mxc_ovl->enabled)
+ imx_ipu_fb_disable_overlay(ovl);
+
+ unregister_framebuffer(ovl);
+
+ ipu_idmac_put(mxc_ovl->ipu_ch);
+ ipu_dmfc_free_bandwidth(mxc_ovl->dmfc);
+ ipu_dmfc_put(mxc_ovl->dmfc);
+
+ framebuffer_release(ovl);
+}
+
+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->di_no = plat_data->display;
+
+ 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;
+ }
+ }
+
+ mxc_fbi->di = ipu_di_get(plat_data->display);
+ if (IS_ERR(mxc_fbi->di)) {
+ ret = PTR_ERR(mxc_fbi->di);
+ goto failed_request_di;
+ }
+
+ 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:
+ ipu_di_put(mxc_fbi->di);
+failed_request_di:
+ 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_di_put(mxc_fbi->di);
+ 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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