ipuv3: add EDID utility functions

Simplify the EDID utility functions in mxc_edid.c from
linux-imx-2.6.38.

Signed-off-by: Jason Chen <b02280@freescale.com>

3 files changed, 523 insertions, 0 deletions

diff --git a/drivers/video/mxc/Makefile b/drivers/video/mxc/Makefile
index 32365062cc5..610aee44f4d 100644
--- a/drivers/video/mxc/Makefile
+++ b/drivers/video/mxc/Makefile
@@ -1 +1,2 @@
+obj-$(CONFIG_FB_MODE_HELPERS)	+= mxc_edid.o
 obj-$(CONFIG_FB_MXC_SYNC_PANEL)	+= mxc_dispdrv.o mxc_ipuv3_fb.o
diff --git a/drivers/video/mxc/mxc_edid.c b/drivers/video/mxc/mxc_edid.c
new file mode 100644
index 00000000000..9a6add26444
--- /dev/null
+++ b/drivers/video/mxc/mxc_edid.c
@@ -0,0 +1,474 @@
+/*
+ * Copyright 2009-2011 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
+ */
+
+/*!
+ * @defgroup Framebuffer Framebuffer Driver for SDC and ADC.
+ */
+
+/*!
+ * @file mxc_edid.c
+ *
+ * @brief MXC EDID driver
+ *
+ * @ingroup Framebuffer
+ */
+
+/*!
+ * Include files
+ */
+#include <linux/i2c.h>
+#include <linux/fb.h>
+#include "mxc_edid.h"
+#include "../edid.h"
+
+#undef DEBUG  /* define this for verbose EDID parsing output */
+
+#ifdef DEBUG
+#define DPRINTK(fmt, args...) printk(fmt, ## args)
+#else
+#define DPRINTK(fmt, args...)
+#endif
+
+const struct fb_videomode mxc_cea_mode[64] = {
+	/* #1: 640x480p@59.94/60Hz */
+	[1] = {
+		NULL, 60, 640, 480, 39722, 48, 16, 33, 10, 96, 2, 0,
+		FB_VMODE_NONINTERLACED, 0,
+	},
+	/* #3: 720x480p@59.94/60Hz */
+	[3] = {
+		NULL, 60, 720, 480, 37037, 60, 16, 30, 9, 62, 6, 0,
+		FB_VMODE_NONINTERLACED, 0,
+	},
+	/* #4: 1280x720p@59.94/60Hz */
+	[4] = {
+		NULL, 60, 1280, 720, 13468, 220, 110, 20, 5, 40, 5,
+		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+		FB_VMODE_NONINTERLACED, 0,
+	},
+	/* #5: 1920x1080i@59.94/60Hz */
+	[5] = {
+		NULL, 60, 1920, 1080, 13763, 148, 88, 15, 2, 44, 5,
+		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+		FB_VMODE_INTERLACED, 0,
+	},
+	/* #7: 720(1440)x480iH@59.94/60Hz */
+	[7] = {
+		NULL, 60, 1440, 480, 18554/*37108*/, 114, 38, 15, 4, 124, 3, 0,
+		FB_VMODE_INTERLACED, 0,
+	},
+	/* #9: 720(1440)x240pH@59.94/60Hz */
+	[9] = {
+		NULL, 60, 1440, 240, 18554, 114, 38, 16, 4, 124, 3, 0,
+		FB_VMODE_NONINTERLACED, 0,
+	},
+	/* #16: 1920x1080p@60Hz */
+	[16] = {
+		NULL, 60, 1920, 1080, 6734, 148, 88, 36, 4, 44, 5,
+		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+		FB_VMODE_NONINTERLACED, 0,
+	},
+	/* #18: 720x576pH@50Hz */
+	[18] = {
+		NULL, 50, 720, 576, 37037, 68, 12, 39, 5, 64, 5, 0,
+		FB_VMODE_NONINTERLACED, 0,
+	},
+	/* #19: 1280x720p@50Hz */
+	[19] = {
+		NULL, 50, 1280, 720, 13468, 220, 440, 20, 5, 40, 5,
+		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+		FB_VMODE_NONINTERLACED, 0,
+	},
+	/* #20: 1920x1080i@50Hz */
+	[20] = {
+		NULL, 50, 1920, 1080, 13480, 148, 528, 15, 5, 528, 5,
+		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+		FB_VMODE_INTERLACED, 0,
+	},
+	/* #31: 1920x1080p@50Hz */
+	[31] = {
+		NULL, 50, 1920, 1080, 6734, 148, 528, 36, 4, 44, 5,
+		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+		FB_VMODE_NONINTERLACED, 0,
+	},
+	/* #32: 1920x1080p@23.98/24Hz */
+	[32] = {
+		NULL, 24, 1920, 1080, 13468, 148, 638, 36, 4, 44, 5,
+		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+		FB_VMODE_NONINTERLACED, 0,
+	},
+	/* #35: (2880)x480p4x@59.94/60Hz */
+	[35] = {
+		NULL, 60, 2880, 480, 9250, 240, 64, 30, 9, 248, 6, 0,
+		FB_VMODE_NONINTERLACED, 0,
+	},
+};
+
+static void get_detailed_timing(unsigned char *block,
+				struct fb_videomode *mode)
+{
+	mode->xres = H_ACTIVE;
+	mode->yres = V_ACTIVE;
+	mode->pixclock = PIXEL_CLOCK;
+	mode->pixclock /= 1000;
+	mode->pixclock = KHZ2PICOS(mode->pixclock);
+	mode->right_margin = H_SYNC_OFFSET;
+	mode->left_margin = (H_ACTIVE + H_BLANKING) -
+		(H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH);
+	mode->upper_margin = V_BLANKING - V_SYNC_OFFSET -
+		V_SYNC_WIDTH;
+	mode->lower_margin = V_SYNC_OFFSET;
+	mode->hsync_len = H_SYNC_WIDTH;
+	mode->vsync_len = V_SYNC_WIDTH;
+	if (HSYNC_POSITIVE)
+		mode->sync |= FB_SYNC_HOR_HIGH_ACT;
+	if (VSYNC_POSITIVE)
+		mode->sync |= FB_SYNC_VERT_HIGH_ACT;
+	mode->refresh = PIXEL_CLOCK/((H_ACTIVE + H_BLANKING) *
+				     (V_ACTIVE + V_BLANKING));
+	if (INTERLACED) {
+		mode->yres *= 2;
+		mode->upper_margin *= 2;
+		mode->lower_margin *= 2;
+		mode->vsync_len *= 2;
+		mode->vmode |= FB_VMODE_INTERLACED;
+	}
+	mode->flag = FB_MODE_IS_DETAILED;
+
+	DPRINTK("      %d MHz ",  PIXEL_CLOCK/1000000);
+	DPRINTK("%d %d %d %d ", H_ACTIVE, H_ACTIVE + H_SYNC_OFFSET,
+	       H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH, H_ACTIVE + H_BLANKING);
+	DPRINTK("%d %d %d %d ", V_ACTIVE, V_ACTIVE + V_SYNC_OFFSET,
+	       V_ACTIVE + V_SYNC_OFFSET + V_SYNC_WIDTH, V_ACTIVE + V_BLANKING);
+	DPRINTK("%sHSync %sVSync\n\n", (HSYNC_POSITIVE) ? "+" : "-",
+	       (VSYNC_POSITIVE) ? "+" : "-");
+}
+
+int mxc_edid_parse_ext_blk(unsigned char *edid,
+		struct mxc_edid_cfg *cfg,
+		struct fb_monspecs *specs)
+{
+	char detail_timing_desc_offset;
+	struct fb_videomode *mode, *m;
+	unsigned char index = 0x0;
+	unsigned char *block;
+	int i, num = 0, revision;
+
+	if (edid[index++] != 0x2) /* only support cea ext block now */
+		return -1;
+	revision = edid[index++];
+	DPRINTK("cea extent revision %d\n", revision);
+	mode = kzalloc(50 * sizeof(struct fb_videomode), GFP_KERNEL);
+	if (mode == NULL)
+		return -1;
+
+	detail_timing_desc_offset = edid[index++];
+
+	if (revision >= 2) {
+		cfg->cea_underscan = (edid[index] >> 7) & 0x1;
+		cfg->cea_basicaudio = (edid[index] >> 6) & 0x1;
+		cfg->cea_ycbcr444 = (edid[index] >> 5) & 0x1;
+		cfg->cea_ycbcr422 = (edid[index] >> 4) & 0x1;
+
+		DPRINTK("CEA underscan %d\n", cfg->cea_underscan);
+		DPRINTK("CEA basicaudio %d\n", cfg->cea_basicaudio);
+		DPRINTK("CEA ycbcr444 %d\n", cfg->cea_ycbcr444);
+		DPRINTK("CEA ycbcr422 %d\n", cfg->cea_ycbcr422);
+	}
+
+	if (revision >= 3) {
+		/* short desc */
+		DPRINTK("CEA Short desc timmings\n");
+		index++;
+		while (index < detail_timing_desc_offset) {
+			unsigned char tagcode, blklen;
+
+			tagcode = (edid[index] >> 5) & 0x7;
+			blklen = (edid[index]) & 0x1f;
+
+			DPRINTK("Tagcode %x Len %d\n", tagcode, blklen);
+
+			switch (tagcode) {
+			case 0x2: /*Video data block*/
+				{
+					int cea_idx;
+					i = 0;
+					while (i < blklen) {
+						index++;
+						cea_idx = edid[index] & 0x7f;
+						if (cea_idx < ARRAY_SIZE(mxc_cea_mode) &&
+								(mxc_cea_mode[cea_idx].xres)) {
+							DPRINTK("Support CEA Format #%d\n", cea_idx);
+							mode[num] = mxc_cea_mode[cea_idx];
+							mode[num].flag |= FB_MODE_IS_STANDARD;
+							num++;
+						}
+						i++;
+					}
+					break;
+				}
+			case 0x3: /*Vendor specific data*/
+				{
+					unsigned char IEEE_reg_iden[3];
+					unsigned char deep_color;
+					IEEE_reg_iden[0] = edid[index+1];
+					IEEE_reg_iden[1] = edid[index+2];
+					IEEE_reg_iden[2] = edid[index+3];
+					deep_color = edid[index+6];
+
+					if ((IEEE_reg_iden[0] == 0x03) &&
+							(IEEE_reg_iden[1] == 0x0c) &&
+							(IEEE_reg_iden[2] == 0x00))
+						cfg->hdmi_cap = 1;
+
+					if (deep_color & 0x40)
+						cfg->vsd_dc_48bit = true;
+					if (deep_color & 0x20)
+						cfg->vsd_dc_36bit = true;
+					if (deep_color & 0x10)
+						cfg->vsd_dc_30bit = true;
+					if (deep_color & 0x08)
+						cfg->vsd_dc_y444 = true;
+					if (deep_color & 0x01)
+						cfg->vsd_dvi_dual = true;
+
+					DPRINTK("VSD hdmi capability %d\n", cfg->hdmi_cap);
+					DPRINTK("VSD support deep color 48bit %d\n", cfg->vsd_dc_48bit);
+					DPRINTK("VSD support deep color 36bit %d\n", cfg->vsd_dc_36bit);
+					DPRINTK("VSD support deep color 30bit %d\n", cfg->vsd_dc_30bit);
+					DPRINTK("VSD support deep color y444 %d\n", cfg->vsd_dc_y444);
+					DPRINTK("VSD support dvi dual %d\n", cfg->vsd_dvi_dual);
+
+					index += blklen;
+					break;
+				}
+			case 0x1: /*Audio data block*/
+			case 0x4: /*Speaker allocation block*/
+			case 0x7: /*User extended block*/
+			default:
+				/* skip */
+				index += blklen;
+				break;
+			}
+
+			index++;
+		}
+	}
+
+	/* long desc */
+	DPRINTK("CEA long desc timmings\n");
+	index = detail_timing_desc_offset;
+	block = edid + index;
+	while (index < (EDID_LENGTH - DETAILED_TIMING_DESCRIPTION_SIZE)) {
+		if (!(block[0] == 0x00 && block[1] == 0x00)) {
+			get_detailed_timing(block, &mode[num]);
+			num++;
+		}
+		block += DETAILED_TIMING_DESCRIPTION_SIZE;
+		index += DETAILED_TIMING_DESCRIPTION_SIZE;
+	}
+
+	if (!num) {
+		kfree(mode);
+		return 0;
+	}
+
+	m = kmalloc((num + specs->modedb_len) *
+			sizeof(struct fb_videomode), GFP_KERNEL);
+	if (!m)
+		return 0;
+
+	if (specs->modedb_len) {
+		memmove(m, specs->modedb,
+			specs->modedb_len * sizeof(struct fb_videomode));
+		kfree(specs->modedb);
+	}
+	memmove(m+specs->modedb_len, mode,
+		num * sizeof(struct fb_videomode));
+	kfree(mode);
+
+	specs->modedb_len += num;
+	specs->modedb = m;
+
+	return 0;
+}
+
+static char compal_edid[256] = {
+0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x38, 0xA3, 0x75, 0x67, 0x01, 0x01, 0x01, 0x01,
+0x02, 0x13, 0x01, 0x03, 0x80, 0x33, 0x1D, 0x78, 0xEA, 0xEE, 0x95, 0xA3, 0x54, 0x4C, 0x99, 0x26,
+0x0F, 0x50, 0x54, 0xBD, 0xEF, 0x80, 0x71, 0x4F, 0x81, 0x4F, 0x90, 0x40, 0x81, 0xC0, 0x81, 0x80,
+0x95, 0x00, 0xB3, 0x00, 0x01, 0x01, 0x02, 0x3A, 0x80, 0x18, 0x71, 0x38, 0x2D, 0x40, 0x58, 0x2C,
+0x45, 0x00, 0xFD, 0x1E, 0x11, 0x00, 0x00, 0x1E, 0x66, 0x21, 0x56, 0xAA, 0x51, 0x00, 0x1E, 0x30,
+0x46, 0x8F, 0x33, 0x00, 0xFE, 0x1F, 0x11, 0x00, 0x00, 0x1E, 0x00, 0x00, 0x00, 0xFD, 0x00, 0x37,
+0x4C, 0x1E, 0x53, 0x11, 0x00, 0x0A, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xFC,
+0x00, 0x46, 0x32, 0x33, 0x57, 0x31, 0x41, 0x0A, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0x32,
+0x02, 0x03, 0x24, 0x71, 0x4A, 0x90, 0x05, 0x04, 0x03, 0x07, 0x1F, 0x14, 0x13, 0x12, 0x16, 0x23,
+0x09, 0x07, 0x07, 0x83, 0x01, 0x00, 0x00, 0x6C, 0x03, 0x0C, 0x00, 0x10, 0x00, 0x00, 0x00, 0xC0,
+0x15, 0x15, 0x1F, 0x1F, 0x01, 0x1D, 0x80, 0x18, 0x71, 0x1C, 0x16, 0x20, 0x58, 0x2C, 0x25, 0x00,
+0xFE, 0x1F, 0x11, 0x00, 0x00, 0x9E, 0x01, 0x1D, 0x00, 0x72, 0x51, 0xD0, 0x1E, 0x20, 0x6E, 0x28,
+0x55, 0x00, 0xFE, 0x1F, 0x11, 0x00, 0x00, 0x1E, 0x8C, 0x0A, 0xD0, 0x8A, 0x20, 0xE0, 0x2D, 0x10,
+0x10, 0x3E, 0x96, 0x00, 0xFE, 0x1F, 0x11, 0x00, 0x00, 0x18, 0x8C, 0x0A, 0xA0, 0x14, 0x51, 0xF0,
+0x16, 0x00, 0x26, 0x7C, 0x43, 0x00, 0xFE, 0x1F, 0x11, 0x00, 0x00, 0x98, 0x00, 0x00, 0x00, 0x00,
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xE3,
+};
+
+static int mxc_edid_readblk(struct i2c_adapter *adp,
+		unsigned short addr, unsigned char *edid)
+{
+#if 0
+	int ret = 0, extblknum = 0;
+	unsigned char regaddr = 0x0;
+	struct i2c_msg msg[2] = {
+		{
+		.addr	= addr,
+		.flags	= 0,
+		.len	= 1,
+		.buf	= &regaddr,
+		}, {
+		.addr	= addr,
+		.flags	= I2C_M_RD,
+		.len	= EDID_LENGTH,
+		.buf	= edid,
+		},
+	};
+
+	ret = i2c_transfer(adp, msg, ARRAY_SIZE(msg));
+	if (ret != ARRAY_SIZE(msg)) {
+		DPRINTK("unable to read EDID block\n");
+		return -EIO;
+	}
+
+	if (edid[1] == 0x00)
+		return -ENOENT;
+
+	extblknum = edid[0x7E];
+
+	if (extblknum) {
+		regaddr = 128;
+		msg[1].buf = edid + EDID_LENGTH;
+
+		ret = i2c_transfer(adp, msg, ARRAY_SIZE(msg));
+		if (ret != ARRAY_SIZE(msg)) {
+			DPRINTK("unable to read EDID ext block\n");
+			return -EIO;
+		}
+	}
+
+	return extblknum;
+#else
+	memcpy(edid, compal_edid, 256);
+	return 1;
+#endif
+}
+
+static int mxc_edid_readsegblk(struct i2c_adapter *adp, unsigned short addr,
+			unsigned char *edid, int seg_num)
+{
+	int ret = 0;
+	unsigned char segment = 0x1, regaddr = 0;
+	struct i2c_msg msg[3] = {
+		{
+		.addr	= 0x30,
+		.flags	= 0,
+		.len	= 1,
+		.buf	= &segment,
+		}, {
+		.addr	= addr,
+		.flags	= 0,
+		.len	= 1,
+		.buf	= &regaddr,
+		}, {
+		.addr	= addr,
+		.flags	= I2C_M_RD,
+		.len	= EDID_LENGTH,
+		.buf	= edid,
+		},
+	};
+
+	ret = i2c_transfer(adp, msg, ARRAY_SIZE(msg));
+	if (ret != ARRAY_SIZE(msg)) {
+		DPRINTK("unable to read EDID block\n");
+		return -EIO;
+	}
+
+	if (seg_num == 2) {
+		regaddr = 128;
+		msg[2].buf = edid + EDID_LENGTH;
+
+		ret = i2c_transfer(adp, msg, ARRAY_SIZE(msg));
+		if (ret != ARRAY_SIZE(msg)) {
+			DPRINTK("unable to read EDID block\n");
+			return -EIO;
+		}
+	}
+
+	return ret;
+}
+
+int mxc_edid_var_to_vic(struct fb_var_screeninfo *var)
+{
+	int i;
+	struct fb_videomode m;
+
+	for (i = 0; i < ARRAY_SIZE(mxc_cea_mode); i++) {
+		fb_var_to_videomode(&m, var);
+		if (fb_mode_is_equal(&m, &mxc_cea_mode[i]))
+			break;
+	}
+
+	if (i == ARRAY_SIZE(mxc_cea_mode))
+		return 0;
+
+	return i;
+}
+EXPORT_SYMBOL(mxc_edid_var_to_vic);
+
+/* make sure edid has 512 bytes*/
+int mxc_edid_read(struct i2c_adapter *adp, unsigned short addr,
+	unsigned char *edid, struct mxc_edid_cfg *cfg, struct fb_info *fbi)
+{
+	int ret = 0, extblknum;
+	if (!adp || !edid || !cfg || !fbi)
+		return -EINVAL;
+
+	memset(edid, 0, EDID_LENGTH*4);
+	memset(cfg, 0, sizeof(struct mxc_edid_cfg));
+
+	extblknum = mxc_edid_readblk(adp, addr, edid);
+	if (extblknum < 0)
+		return extblknum;
+
+	/* edid first block parsing */
+	memset(&fbi->monspecs, 0, sizeof(fbi->monspecs));
+	fb_edid_to_monspecs(edid, &fbi->monspecs);
+
+	if (extblknum) {
+		int i;
+
+		/* need read segment block? */
+		if (extblknum > 1) {
+			ret = mxc_edid_readsegblk(adp, addr,
+				edid + EDID_LENGTH*2, extblknum - 1);
+			if (ret < 0)
+				return ret;
+		}
+
+		for (i = 1; i <= extblknum; i++)
+			/* edid ext block parsing */
+			mxc_edid_parse_ext_blk(edid + i*EDID_LENGTH,
+					cfg, &fbi->monspecs);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(mxc_edid_read);
diff --git a/drivers/video/mxc/mxc_edid.h b/drivers/video/mxc/mxc_edid.h
new file mode 100644
index 00000000000..ec65a5fa9bd
--- /dev/null
+++ b/drivers/video/mxc/mxc_edid.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2009-2011 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
+ */
+
+/*!
+ * @defgroup Framebuffer Framebuffer Driver for SDC and ADC.
+ */
+
+/*!
+ * @file mxc_edid.h
+ *
+ * @brief MXC EDID tools
+ *
+ * @ingroup Framebuffer
+ */
+
+#ifndef MXC_EDID_H
+#define MXC_EDID_H
+
+struct mxc_edid_cfg {
+	bool cea_underscan;
+	bool cea_basicaudio;
+	bool cea_ycbcr444;
+	bool cea_ycbcr422;
+	bool hdmi_cap;
+
+	/*VSD*/
+	bool vsd_dc_48bit;
+	bool vsd_dc_36bit;
+	bool vsd_dc_30bit;
+	bool vsd_dc_y444;
+	bool vsd_dvi_dual;
+};
+
+int mxc_edid_var_to_vic(struct fb_var_screeninfo *var);
+int mxc_edid_read(struct i2c_adapter *adp, unsigned short addr,
+	unsigned char *edid, struct mxc_edid_cfg *cfg, struct fb_info *fbi);
+
+#endif