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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/drivers/video/fbmon.c
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/drivers/video/fbmon.c')
-rw-r--r--ANDROID_3.4.5/drivers/video/fbmon.c1498
1 files changed, 0 insertions, 1498 deletions
diff --git a/ANDROID_3.4.5/drivers/video/fbmon.c b/ANDROID_3.4.5/drivers/video/fbmon.c
deleted file mode 100644
index cef65574..00000000
--- a/ANDROID_3.4.5/drivers/video/fbmon.c
+++ /dev/null
@@ -1,1498 +0,0 @@
-/*
- * linux/drivers/video/fbmon.c
- *
- * Copyright (C) 2002 James Simmons <jsimmons@users.sf.net>
- *
- * Credits:
- *
- * The EDID Parser is a conglomeration from the following sources:
- *
- * 1. SciTech SNAP Graphics Architecture
- * Copyright (C) 1991-2002 SciTech Software, Inc. All rights reserved.
- *
- * 2. XFree86 4.3.0, interpret_edid.c
- * Copyright 1998 by Egbert Eich <Egbert.Eich@Physik.TU-Darmstadt.DE>
- *
- * 3. John Fremlin <vii@users.sourceforge.net> and
- * Ani Joshi <ajoshi@unixbox.com>
- *
- * Generalized Timing Formula is derived from:
- *
- * GTF Spreadsheet by Andy Morrish (1/5/97)
- * available at http://www.vesa.org
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file COPYING in the main directory of this archive
- * for more details.
- *
- */
-#include <linux/fb.h>
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/slab.h>
-#include <video/edid.h>
-#ifdef CONFIG_PPC_OF
-#include <asm/prom.h>
-#include <asm/pci-bridge.h>
-#endif
-#include "edid.h"
-
-/*
- * EDID parser
- */
-
-#undef DEBUG /* define this for verbose EDID parsing output */
-
-#ifdef DEBUG
-#define DPRINTK(fmt, args...) printk(fmt,## args)
-#else
-#define DPRINTK(fmt, args...)
-#endif
-
-#define FBMON_FIX_HEADER 1
-#define FBMON_FIX_INPUT 2
-#define FBMON_FIX_TIMINGS 3
-
-#ifdef CONFIG_FB_MODE_HELPERS
-struct broken_edid {
- u8 manufacturer[4];
- u32 model;
- u32 fix;
-};
-
-static const struct broken_edid brokendb[] = {
- /* DEC FR-PCXAV-YZ */
- {
- .manufacturer = "DEC",
- .model = 0x073a,
- .fix = FBMON_FIX_HEADER,
- },
- /* ViewSonic PF775a */
- {
- .manufacturer = "VSC",
- .model = 0x5a44,
- .fix = FBMON_FIX_INPUT,
- },
- /* Sharp UXGA? */
- {
- .manufacturer = "SHP",
- .model = 0x138e,
- .fix = FBMON_FIX_TIMINGS,
- },
-};
-
-static const unsigned char edid_v1_header[] = { 0x00, 0xff, 0xff, 0xff,
- 0xff, 0xff, 0xff, 0x00
-};
-
-static void copy_string(unsigned char *c, unsigned char *s)
-{
- int i;
- c = c + 5;
- for (i = 0; (i < 13 && *c != 0x0A); i++)
- *(s++) = *(c++);
- *s = 0;
- while (i-- && (*--s == 0x20)) *s = 0;
-}
-
-static int edid_is_serial_block(unsigned char *block)
-{
- if ((block[0] == 0x00) && (block[1] == 0x00) &&
- (block[2] == 0x00) && (block[3] == 0xff) &&
- (block[4] == 0x00))
- return 1;
- else
- return 0;
-}
-
-static int edid_is_ascii_block(unsigned char *block)
-{
- if ((block[0] == 0x00) && (block[1] == 0x00) &&
- (block[2] == 0x00) && (block[3] == 0xfe) &&
- (block[4] == 0x00))
- return 1;
- else
- return 0;
-}
-
-static int edid_is_limits_block(unsigned char *block)
-{
- if ((block[0] == 0x00) && (block[1] == 0x00) &&
- (block[2] == 0x00) && (block[3] == 0xfd) &&
- (block[4] == 0x00))
- return 1;
- else
- return 0;
-}
-
-static int edid_is_monitor_block(unsigned char *block)
-{
- if ((block[0] == 0x00) && (block[1] == 0x00) &&
- (block[2] == 0x00) && (block[3] == 0xfc) &&
- (block[4] == 0x00))
- return 1;
- else
- return 0;
-}
-
-static int edid_is_timing_block(unsigned char *block)
-{
- if ((block[0] != 0x00) || (block[1] != 0x00) ||
- (block[2] != 0x00) || (block[4] != 0x00))
- return 1;
- else
- return 0;
-}
-
-static int check_edid(unsigned char *edid)
-{
- unsigned char *block = edid + ID_MANUFACTURER_NAME, manufacturer[4];
- unsigned char *b;
- u32 model;
- int i, fix = 0, ret = 0;
-
- manufacturer[0] = ((block[0] & 0x7c) >> 2) + '@';
- manufacturer[1] = ((block[0] & 0x03) << 3) +
- ((block[1] & 0xe0) >> 5) + '@';
- manufacturer[2] = (block[1] & 0x1f) + '@';
- manufacturer[3] = 0;
- model = block[2] + (block[3] << 8);
-
- for (i = 0; i < ARRAY_SIZE(brokendb); i++) {
- if (!strncmp(manufacturer, brokendb[i].manufacturer, 4) &&
- brokendb[i].model == model) {
- fix = brokendb[i].fix;
- break;
- }
- }
-
- switch (fix) {
- case FBMON_FIX_HEADER:
- for (i = 0; i < 8; i++) {
- if (edid[i] != edid_v1_header[i]) {
- ret = fix;
- break;
- }
- }
- break;
- case FBMON_FIX_INPUT:
- b = edid + EDID_STRUCT_DISPLAY;
- /* Only if display is GTF capable will
- the input type be reset to analog */
- if (b[4] & 0x01 && b[0] & 0x80)
- ret = fix;
- break;
- case FBMON_FIX_TIMINGS:
- b = edid + DETAILED_TIMING_DESCRIPTIONS_START;
- ret = fix;
-
- for (i = 0; i < 4; i++) {
- if (edid_is_limits_block(b)) {
- ret = 0;
- break;
- }
-
- b += DETAILED_TIMING_DESCRIPTION_SIZE;
- }
-
- break;
- }
-
- if (ret)
- printk("fbmon: The EDID Block of "
- "Manufacturer: %s Model: 0x%x is known to "
- "be broken,\n", manufacturer, model);
-
- return ret;
-}
-
-static void fix_edid(unsigned char *edid, int fix)
-{
- int i;
- unsigned char *b, csum = 0;
-
- switch (fix) {
- case FBMON_FIX_HEADER:
- printk("fbmon: trying a header reconstruct\n");
- memcpy(edid, edid_v1_header, 8);
- break;
- case FBMON_FIX_INPUT:
- printk("fbmon: trying to fix input type\n");
- b = edid + EDID_STRUCT_DISPLAY;
- b[0] &= ~0x80;
- edid[127] += 0x80;
- break;
- case FBMON_FIX_TIMINGS:
- printk("fbmon: trying to fix monitor timings\n");
- b = edid + DETAILED_TIMING_DESCRIPTIONS_START;
- for (i = 0; i < 4; i++) {
- if (!(edid_is_serial_block(b) ||
- edid_is_ascii_block(b) ||
- edid_is_monitor_block(b) ||
- edid_is_timing_block(b))) {
- b[0] = 0x00;
- b[1] = 0x00;
- b[2] = 0x00;
- b[3] = 0xfd;
- b[4] = 0x00;
- b[5] = 60; /* vfmin */
- b[6] = 60; /* vfmax */
- b[7] = 30; /* hfmin */
- b[8] = 75; /* hfmax */
- b[9] = 17; /* pixclock - 170 MHz*/
- b[10] = 0; /* GTF */
- break;
- }
-
- b += DETAILED_TIMING_DESCRIPTION_SIZE;
- }
-
- for (i = 0; i < EDID_LENGTH - 1; i++)
- csum += edid[i];
-
- edid[127] = 256 - csum;
- break;
- }
-}
-
-static int edid_checksum(unsigned char *edid)
-{
- unsigned char csum = 0, all_null = 0;
- int i, err = 0, fix = check_edid(edid);
-
- if (fix)
- fix_edid(edid, fix);
-
- for (i = 0; i < EDID_LENGTH; i++) {
- csum += edid[i];
- all_null |= edid[i];
- }
-
- if (csum == 0x00 && all_null) {
- /* checksum passed, everything's good */
- err = 1;
- }
-
- return err;
-}
-
-static int edid_check_header(unsigned char *edid)
-{
- int i, err = 1, fix = check_edid(edid);
-
- if (fix)
- fix_edid(edid, fix);
-
- for (i = 0; i < 8; i++) {
- if (edid[i] != edid_v1_header[i])
- err = 0;
- }
-
- return err;
-}
-
-static void parse_vendor_block(unsigned char *block, struct fb_monspecs *specs)
-{
- specs->manufacturer[0] = ((block[0] & 0x7c) >> 2) + '@';
- specs->manufacturer[1] = ((block[0] & 0x03) << 3) +
- ((block[1] & 0xe0) >> 5) + '@';
- specs->manufacturer[2] = (block[1] & 0x1f) + '@';
- specs->manufacturer[3] = 0;
- specs->model = block[2] + (block[3] << 8);
- specs->serial = block[4] + (block[5] << 8) +
- (block[6] << 16) + (block[7] << 24);
- specs->year = block[9] + 1990;
- specs->week = block[8];
- DPRINTK(" Manufacturer: %s\n", specs->manufacturer);
- DPRINTK(" Model: %x\n", specs->model);
- DPRINTK(" Serial#: %u\n", specs->serial);
- DPRINTK(" Year: %u Week %u\n", specs->year, specs->week);
-}
-
-static void get_dpms_capabilities(unsigned char flags,
- struct fb_monspecs *specs)
-{
- specs->dpms = 0;
- if (flags & DPMS_ACTIVE_OFF)
- specs->dpms |= FB_DPMS_ACTIVE_OFF;
- if (flags & DPMS_SUSPEND)
- specs->dpms |= FB_DPMS_SUSPEND;
- if (flags & DPMS_STANDBY)
- specs->dpms |= FB_DPMS_STANDBY;
- DPRINTK(" DPMS: Active %s, Suspend %s, Standby %s\n",
- (flags & DPMS_ACTIVE_OFF) ? "yes" : "no",
- (flags & DPMS_SUSPEND) ? "yes" : "no",
- (flags & DPMS_STANDBY) ? "yes" : "no");
-}
-
-static void get_chroma(unsigned char *block, struct fb_monspecs *specs)
-{
- int tmp;
-
- DPRINTK(" Chroma\n");
- /* Chromaticity data */
- tmp = ((block[5] & (3 << 6)) >> 6) | (block[0x7] << 2);
- tmp *= 1000;
- tmp += 512;
- specs->chroma.redx = tmp/1024;
- DPRINTK(" RedX: 0.%03d ", specs->chroma.redx);
-
- tmp = ((block[5] & (3 << 4)) >> 4) | (block[0x8] << 2);
- tmp *= 1000;
- tmp += 512;
- specs->chroma.redy = tmp/1024;
- DPRINTK("RedY: 0.%03d\n", specs->chroma.redy);
-
- tmp = ((block[5] & (3 << 2)) >> 2) | (block[0x9] << 2);
- tmp *= 1000;
- tmp += 512;
- specs->chroma.greenx = tmp/1024;
- DPRINTK(" GreenX: 0.%03d ", specs->chroma.greenx);
-
- tmp = (block[5] & 3) | (block[0xa] << 2);
- tmp *= 1000;
- tmp += 512;
- specs->chroma.greeny = tmp/1024;
- DPRINTK("GreenY: 0.%03d\n", specs->chroma.greeny);
-
- tmp = ((block[6] & (3 << 6)) >> 6) | (block[0xb] << 2);
- tmp *= 1000;
- tmp += 512;
- specs->chroma.bluex = tmp/1024;
- DPRINTK(" BlueX: 0.%03d ", specs->chroma.bluex);
-
- tmp = ((block[6] & (3 << 4)) >> 4) | (block[0xc] << 2);
- tmp *= 1000;
- tmp += 512;
- specs->chroma.bluey = tmp/1024;
- DPRINTK("BlueY: 0.%03d\n", specs->chroma.bluey);
-
- tmp = ((block[6] & (3 << 2)) >> 2) | (block[0xd] << 2);
- tmp *= 1000;
- tmp += 512;
- specs->chroma.whitex = tmp/1024;
- DPRINTK(" WhiteX: 0.%03d ", specs->chroma.whitex);
-
- tmp = (block[6] & 3) | (block[0xe] << 2);
- tmp *= 1000;
- tmp += 512;
- specs->chroma.whitey = tmp/1024;
- DPRINTK("WhiteY: 0.%03d\n", specs->chroma.whitey);
-}
-
-static void calc_mode_timings(int xres, int yres, int refresh,
- struct fb_videomode *mode)
-{
- struct fb_var_screeninfo *var;
-
- var = kzalloc(sizeof(struct fb_var_screeninfo), GFP_KERNEL);
-
- if (var) {
- var->xres = xres;
- var->yres = yres;
- fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON,
- refresh, var, NULL);
- mode->xres = xres;
- mode->yres = yres;
- mode->pixclock = var->pixclock;
- mode->refresh = refresh;
- mode->left_margin = var->left_margin;
- mode->right_margin = var->right_margin;
- mode->upper_margin = var->upper_margin;
- mode->lower_margin = var->lower_margin;
- mode->hsync_len = var->hsync_len;
- mode->vsync_len = var->vsync_len;
- mode->vmode = 0;
- mode->sync = 0;
- kfree(var);
- }
-}
-
-static int get_est_timing(unsigned char *block, struct fb_videomode *mode)
-{
- int num = 0;
- unsigned char c;
-
- c = block[0];
- if (c&0x80) {
- calc_mode_timings(720, 400, 70, &mode[num]);
- mode[num++].flag = FB_MODE_IS_CALCULATED;
- DPRINTK(" 720x400@70Hz\n");
- }
- if (c&0x40) {
- calc_mode_timings(720, 400, 88, &mode[num]);
- mode[num++].flag = FB_MODE_IS_CALCULATED;
- DPRINTK(" 720x400@88Hz\n");
- }
- if (c&0x20) {
- mode[num++] = vesa_modes[3];
- DPRINTK(" 640x480@60Hz\n");
- }
- if (c&0x10) {
- calc_mode_timings(640, 480, 67, &mode[num]);
- mode[num++].flag = FB_MODE_IS_CALCULATED;
- DPRINTK(" 640x480@67Hz\n");
- }
- if (c&0x08) {
- mode[num++] = vesa_modes[4];
- DPRINTK(" 640x480@72Hz\n");
- }
- if (c&0x04) {
- mode[num++] = vesa_modes[5];
- DPRINTK(" 640x480@75Hz\n");
- }
- if (c&0x02) {
- mode[num++] = vesa_modes[7];
- DPRINTK(" 800x600@56Hz\n");
- }
- if (c&0x01) {
- mode[num++] = vesa_modes[8];
- DPRINTK(" 800x600@60Hz\n");
- }
-
- c = block[1];
- if (c&0x80) {
- mode[num++] = vesa_modes[9];
- DPRINTK(" 800x600@72Hz\n");
- }
- if (c&0x40) {
- mode[num++] = vesa_modes[10];
- DPRINTK(" 800x600@75Hz\n");
- }
- if (c&0x20) {
- calc_mode_timings(832, 624, 75, &mode[num]);
- mode[num++].flag = FB_MODE_IS_CALCULATED;
- DPRINTK(" 832x624@75Hz\n");
- }
- if (c&0x10) {
- mode[num++] = vesa_modes[12];
- DPRINTK(" 1024x768@87Hz Interlaced\n");
- }
- if (c&0x08) {
- mode[num++] = vesa_modes[13];
- DPRINTK(" 1024x768@60Hz\n");
- }
- if (c&0x04) {
- mode[num++] = vesa_modes[14];
- DPRINTK(" 1024x768@70Hz\n");
- }
- if (c&0x02) {
- mode[num++] = vesa_modes[15];
- DPRINTK(" 1024x768@75Hz\n");
- }
- if (c&0x01) {
- mode[num++] = vesa_modes[21];
- DPRINTK(" 1280x1024@75Hz\n");
- }
- c = block[2];
- if (c&0x80) {
- mode[num++] = vesa_modes[17];
- DPRINTK(" 1152x870@75Hz\n");
- }
- DPRINTK(" Manufacturer's mask: %x\n",c&0x7F);
- return num;
-}
-
-static int get_std_timing(unsigned char *block, struct fb_videomode *mode,
- int ver, int rev)
-{
- int xres, yres = 0, refresh, ratio, i;
-
- xres = (block[0] + 31) * 8;
- if (xres <= 256)
- return 0;
-
- ratio = (block[1] & 0xc0) >> 6;
- switch (ratio) {
- case 0:
- /* in EDID 1.3 the meaning of 0 changed to 16:10 (prior 1:1) */
- if (ver < 1 || (ver == 1 && rev < 3))
- yres = xres;
- else
- yres = (xres * 10)/16;
- break;
- case 1:
- yres = (xres * 3)/4;
- break;
- case 2:
- yres = (xres * 4)/5;
- break;
- case 3:
- yres = (xres * 9)/16;
- break;
- }
- refresh = (block[1] & 0x3f) + 60;
-
- DPRINTK(" %dx%d@%dHz\n", xres, yres, refresh);
- for (i = 0; i < VESA_MODEDB_SIZE; i++) {
- if (vesa_modes[i].xres == xres &&
- vesa_modes[i].yres == yres &&
- vesa_modes[i].refresh == refresh) {
- *mode = vesa_modes[i];
- mode->flag |= FB_MODE_IS_STANDARD;
- return 1;
- }
- }
- calc_mode_timings(xres, yres, refresh, mode);
- return 1;
-}
-
-static int get_dst_timing(unsigned char *block,
- struct fb_videomode *mode, int ver, int rev)
-{
- int j, num = 0;
-
- for (j = 0; j < 6; j++, block += STD_TIMING_DESCRIPTION_SIZE)
- num += get_std_timing(block, &mode[num], ver, rev);
-
- return num;
-}
-
-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) ? "+" : "-");
-}
-
-/**
- * fb_create_modedb - create video mode database
- * @edid: EDID data
- * @dbsize: database size
- *
- * RETURNS: struct fb_videomode, @dbsize contains length of database
- *
- * DESCRIPTION:
- * This function builds a mode database using the contents of the EDID
- * data
- */
-static struct fb_videomode *fb_create_modedb(unsigned char *edid, int *dbsize)
-{
- struct fb_videomode *mode, *m;
- unsigned char *block;
- int num = 0, i, first = 1;
- int ver, rev;
-
- ver = edid[EDID_STRUCT_VERSION];
- rev = edid[EDID_STRUCT_REVISION];
-
- mode = kzalloc(50 * sizeof(struct fb_videomode), GFP_KERNEL);
- if (mode == NULL)
- return NULL;
-
- if (edid == NULL || !edid_checksum(edid) ||
- !edid_check_header(edid)) {
- kfree(mode);
- return NULL;
- }
-
- *dbsize = 0;
-
- DPRINTK(" Detailed Timings\n");
- block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
- for (i = 0; i < 4; i++, block+= DETAILED_TIMING_DESCRIPTION_SIZE) {
- if (!(block[0] == 0x00 && block[1] == 0x00)) {
- get_detailed_timing(block, &mode[num]);
- if (first) {
- mode[num].flag |= FB_MODE_IS_FIRST;
- first = 0;
- }
- num++;
- }
- }
-
- DPRINTK(" Supported VESA Modes\n");
- block = edid + ESTABLISHED_TIMING_1;
- num += get_est_timing(block, &mode[num]);
-
- DPRINTK(" Standard Timings\n");
- block = edid + STD_TIMING_DESCRIPTIONS_START;
- for (i = 0; i < STD_TIMING; i++, block += STD_TIMING_DESCRIPTION_SIZE)
- num += get_std_timing(block, &mode[num], ver, rev);
-
- block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
- for (i = 0; i < 4; i++, block+= DETAILED_TIMING_DESCRIPTION_SIZE) {
- if (block[0] == 0x00 && block[1] == 0x00 && block[3] == 0xfa)
- num += get_dst_timing(block + 5, &mode[num], ver, rev);
- }
-
- /* Yikes, EDID data is totally useless */
- if (!num) {
- kfree(mode);
- return NULL;
- }
-
- *dbsize = num;
- m = kmalloc(num * sizeof(struct fb_videomode), GFP_KERNEL);
- if (!m)
- return mode;
- memmove(m, mode, num * sizeof(struct fb_videomode));
- kfree(mode);
- return m;
-}
-
-/**
- * fb_destroy_modedb - destroys mode database
- * @modedb: mode database to destroy
- *
- * DESCRIPTION:
- * Destroy mode database created by fb_create_modedb
- */
-void fb_destroy_modedb(struct fb_videomode *modedb)
-{
- kfree(modedb);
-}
-
-static int fb_get_monitor_limits(unsigned char *edid, struct fb_monspecs *specs)
-{
- int i, retval = 1;
- unsigned char *block;
-
- block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
-
- DPRINTK(" Monitor Operating Limits: ");
-
- for (i = 0; i < 4; i++, block += DETAILED_TIMING_DESCRIPTION_SIZE) {
- if (edid_is_limits_block(block)) {
- specs->hfmin = H_MIN_RATE * 1000;
- specs->hfmax = H_MAX_RATE * 1000;
- specs->vfmin = V_MIN_RATE;
- specs->vfmax = V_MAX_RATE;
- specs->dclkmax = MAX_PIXEL_CLOCK * 1000000;
- specs->gtf = (GTF_SUPPORT) ? 1 : 0;
- retval = 0;
- DPRINTK("From EDID\n");
- break;
- }
- }
-
- /* estimate monitor limits based on modes supported */
- if (retval) {
- struct fb_videomode *modes, *mode;
- int num_modes, hz, hscan, pixclock;
- int vtotal, htotal;
-
- modes = fb_create_modedb(edid, &num_modes);
- if (!modes) {
- DPRINTK("None Available\n");
- return 1;
- }
-
- retval = 0;
- for (i = 0; i < num_modes; i++) {
- mode = &modes[i];
- pixclock = PICOS2KHZ(modes[i].pixclock) * 1000;
- htotal = mode->xres + mode->right_margin + mode->hsync_len
- + mode->left_margin;
- vtotal = mode->yres + mode->lower_margin + mode->vsync_len
- + mode->upper_margin;
-
- if (mode->vmode & FB_VMODE_INTERLACED)
- vtotal /= 2;
-
- if (mode->vmode & FB_VMODE_DOUBLE)
- vtotal *= 2;
-
- hscan = (pixclock + htotal / 2) / htotal;
- hscan = (hscan + 500) / 1000 * 1000;
- hz = (hscan + vtotal / 2) / vtotal;
-
- if (specs->dclkmax == 0 || specs->dclkmax < pixclock)
- specs->dclkmax = pixclock;
-
- if (specs->dclkmin == 0 || specs->dclkmin > pixclock)
- specs->dclkmin = pixclock;
-
- if (specs->hfmax == 0 || specs->hfmax < hscan)
- specs->hfmax = hscan;
-
- if (specs->hfmin == 0 || specs->hfmin > hscan)
- specs->hfmin = hscan;
-
- if (specs->vfmax == 0 || specs->vfmax < hz)
- specs->vfmax = hz;
-
- if (specs->vfmin == 0 || specs->vfmin > hz)
- specs->vfmin = hz;
- }
- DPRINTK("Extrapolated\n");
- fb_destroy_modedb(modes);
- }
- DPRINTK(" H: %d-%dKHz V: %d-%dHz DCLK: %dMHz\n",
- specs->hfmin/1000, specs->hfmax/1000, specs->vfmin,
- specs->vfmax, specs->dclkmax/1000000);
- return retval;
-}
-
-static void get_monspecs(unsigned char *edid, struct fb_monspecs *specs)
-{
- unsigned char c, *block;
-
- block = edid + EDID_STRUCT_DISPLAY;
-
- fb_get_monitor_limits(edid, specs);
-
- c = block[0] & 0x80;
- specs->input = 0;
- if (c) {
- specs->input |= FB_DISP_DDI;
- DPRINTK(" Digital Display Input");
- } else {
- DPRINTK(" Analog Display Input: Input Voltage - ");
- switch ((block[0] & 0x60) >> 5) {
- case 0:
- DPRINTK("0.700V/0.300V");
- specs->input |= FB_DISP_ANA_700_300;
- break;
- case 1:
- DPRINTK("0.714V/0.286V");
- specs->input |= FB_DISP_ANA_714_286;
- break;
- case 2:
- DPRINTK("1.000V/0.400V");
- specs->input |= FB_DISP_ANA_1000_400;
- break;
- case 3:
- DPRINTK("0.700V/0.000V");
- specs->input |= FB_DISP_ANA_700_000;
- break;
- }
- }
- DPRINTK("\n Sync: ");
- c = block[0] & 0x10;
- if (c)
- DPRINTK(" Configurable signal level\n");
- c = block[0] & 0x0f;
- specs->signal = 0;
- if (c & 0x10) {
- DPRINTK("Blank to Blank ");
- specs->signal |= FB_SIGNAL_BLANK_BLANK;
- }
- if (c & 0x08) {
- DPRINTK("Separate ");
- specs->signal |= FB_SIGNAL_SEPARATE;
- }
- if (c & 0x04) {
- DPRINTK("Composite ");
- specs->signal |= FB_SIGNAL_COMPOSITE;
- }
- if (c & 0x02) {
- DPRINTK("Sync on Green ");
- specs->signal |= FB_SIGNAL_SYNC_ON_GREEN;
- }
- if (c & 0x01) {
- DPRINTK("Serration on ");
- specs->signal |= FB_SIGNAL_SERRATION_ON;
- }
- DPRINTK("\n");
- specs->max_x = block[1];
- specs->max_y = block[2];
- DPRINTK(" Max H-size in cm: ");
- if (specs->max_x)
- DPRINTK("%d\n", specs->max_x);
- else
- DPRINTK("variable\n");
- DPRINTK(" Max V-size in cm: ");
- if (specs->max_y)
- DPRINTK("%d\n", specs->max_y);
- else
- DPRINTK("variable\n");
-
- c = block[3];
- specs->gamma = c+100;
- DPRINTK(" Gamma: ");
- DPRINTK("%d.%d\n", specs->gamma/100, specs->gamma % 100);
-
- get_dpms_capabilities(block[4], specs);
-
- switch ((block[4] & 0x18) >> 3) {
- case 0:
- DPRINTK(" Monochrome/Grayscale\n");
- specs->input |= FB_DISP_MONO;
- break;
- case 1:
- DPRINTK(" RGB Color Display\n");
- specs->input |= FB_DISP_RGB;
- break;
- case 2:
- DPRINTK(" Non-RGB Multicolor Display\n");
- specs->input |= FB_DISP_MULTI;
- break;
- default:
- DPRINTK(" Unknown\n");
- specs->input |= FB_DISP_UNKNOWN;
- break;
- }
-
- get_chroma(block, specs);
-
- specs->misc = 0;
- c = block[4] & 0x7;
- if (c & 0x04) {
- DPRINTK(" Default color format is primary\n");
- specs->misc |= FB_MISC_PRIM_COLOR;
- }
- if (c & 0x02) {
- DPRINTK(" First DETAILED Timing is preferred\n");
- specs->misc |= FB_MISC_1ST_DETAIL;
- }
- if (c & 0x01) {
- printk(" Display is GTF capable\n");
- specs->gtf = 1;
- }
-}
-
-int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var)
-{
- int i;
- unsigned char *block;
-
- if (edid == NULL || var == NULL)
- return 1;
-
- if (!(edid_checksum(edid)))
- return 1;
-
- if (!(edid_check_header(edid)))
- return 1;
-
- block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
-
- for (i = 0; i < 4; i++, block += DETAILED_TIMING_DESCRIPTION_SIZE) {
- if (edid_is_timing_block(block)) {
- var->xres = var->xres_virtual = H_ACTIVE;
- var->yres = var->yres_virtual = V_ACTIVE;
- var->height = var->width = 0;
- var->right_margin = H_SYNC_OFFSET;
- var->left_margin = (H_ACTIVE + H_BLANKING) -
- (H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH);
- var->upper_margin = V_BLANKING - V_SYNC_OFFSET -
- V_SYNC_WIDTH;
- var->lower_margin = V_SYNC_OFFSET;
- var->hsync_len = H_SYNC_WIDTH;
- var->vsync_len = V_SYNC_WIDTH;
- var->pixclock = PIXEL_CLOCK;
- var->pixclock /= 1000;
- var->pixclock = KHZ2PICOS(var->pixclock);
-
- if (HSYNC_POSITIVE)
- var->sync |= FB_SYNC_HOR_HIGH_ACT;
- if (VSYNC_POSITIVE)
- var->sync |= FB_SYNC_VERT_HIGH_ACT;
- return 0;
- }
- }
- return 1;
-}
-
-void fb_edid_to_monspecs(unsigned char *edid, struct fb_monspecs *specs)
-{
- unsigned char *block;
- int i, found = 0;
-
- if (edid == NULL)
- return;
-
- if (!(edid_checksum(edid)))
- return;
-
- if (!(edid_check_header(edid)))
- return;
-
- memset(specs, 0, sizeof(struct fb_monspecs));
-
- specs->version = edid[EDID_STRUCT_VERSION];
- specs->revision = edid[EDID_STRUCT_REVISION];
-
- DPRINTK("========================================\n");
- DPRINTK("Display Information (EDID)\n");
- DPRINTK("========================================\n");
- DPRINTK(" EDID Version %d.%d\n", (int) specs->version,
- (int) specs->revision);
-
- parse_vendor_block(edid + ID_MANUFACTURER_NAME, specs);
-
- block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
- for (i = 0; i < 4; i++, block += DETAILED_TIMING_DESCRIPTION_SIZE) {
- if (edid_is_serial_block(block)) {
- copy_string(block, specs->serial_no);
- DPRINTK(" Serial Number: %s\n", specs->serial_no);
- } else if (edid_is_ascii_block(block)) {
- copy_string(block, specs->ascii);
- DPRINTK(" ASCII Block: %s\n", specs->ascii);
- } else if (edid_is_monitor_block(block)) {
- copy_string(block, specs->monitor);
- DPRINTK(" Monitor Name: %s\n", specs->monitor);
- }
- }
-
- DPRINTK(" Display Characteristics:\n");
- get_monspecs(edid, specs);
-
- specs->modedb = fb_create_modedb(edid, &specs->modedb_len);
-
- /*
- * Workaround for buggy EDIDs that sets that the first
- * detailed timing is preferred but has not detailed
- * timing specified
- */
- for (i = 0; i < specs->modedb_len; i++) {
- if (specs->modedb[i].flag & FB_MODE_IS_DETAILED) {
- found = 1;
- break;
- }
- }
-
- if (!found)
- specs->misc &= ~FB_MISC_1ST_DETAIL;
-
- DPRINTK("========================================\n");
-}
-
-/**
- * fb_edid_add_monspecs() - add monitor video modes from E-EDID data
- * @edid: 128 byte array with an E-EDID block
- * @spacs: monitor specs to be extended
- */
-void fb_edid_add_monspecs(unsigned char *edid, struct fb_monspecs *specs)
-{
- unsigned char *block;
- struct fb_videomode *m;
- int num = 0, i;
- u8 svd[64], edt[(128 - 4) / DETAILED_TIMING_DESCRIPTION_SIZE];
- u8 pos = 4, svd_n = 0;
-
- if (!edid)
- return;
-
- if (!edid_checksum(edid))
- return;
-
- if (edid[0] != 0x2 ||
- edid[2] < 4 || edid[2] > 128 - DETAILED_TIMING_DESCRIPTION_SIZE)
- return;
-
- DPRINTK(" Short Video Descriptors\n");
-
- while (pos < edid[2]) {
- u8 len = edid[pos] & 0x1f, type = (edid[pos] >> 5) & 7;
- pr_debug("Data block %u of %u bytes\n", type, len);
- if (type == 2)
- for (i = pos; i < pos + len; i++) {
- u8 idx = edid[pos + i] & 0x7f;
- svd[svd_n++] = idx;
- pr_debug("N%sative mode #%d\n",
- edid[pos + i] & 0x80 ? "" : "on-n", idx);
- }
- pos += len + 1;
- }
-
- block = edid + edid[2];
-
- DPRINTK(" Extended Detailed Timings\n");
-
- for (i = 0; i < (128 - edid[2]) / DETAILED_TIMING_DESCRIPTION_SIZE;
- i++, block += DETAILED_TIMING_DESCRIPTION_SIZE)
- if (PIXEL_CLOCK)
- edt[num++] = block - edid;
-
- /* Yikes, EDID data is totally useless */
- if (!(num + svd_n))
- return;
-
- m = kzalloc((specs->modedb_len + num + svd_n) *
- sizeof(struct fb_videomode), GFP_KERNEL);
-
- if (!m)
- return;
-
- memcpy(m, specs->modedb, specs->modedb_len * sizeof(struct fb_videomode));
-
- for (i = specs->modedb_len; i < specs->modedb_len + num; i++) {
- get_detailed_timing(edid + edt[i - specs->modedb_len], &m[i]);
- if (i == specs->modedb_len)
- m[i].flag |= FB_MODE_IS_FIRST;
- pr_debug("Adding %ux%u@%u\n", m[i].xres, m[i].yres, m[i].refresh);
- }
-
- for (i = specs->modedb_len + num; i < specs->modedb_len + num + svd_n; i++) {
- int idx = svd[i - specs->modedb_len - num];
- if (!idx || idx > 63) {
- pr_warning("Reserved SVD code %d\n", idx);
- } else if (idx > ARRAY_SIZE(cea_modes) || !cea_modes[idx].xres) {
- pr_warning("Unimplemented SVD code %d\n", idx);
- } else {
- memcpy(&m[i], cea_modes + idx, sizeof(m[i]));
- pr_debug("Adding SVD #%d: %ux%u@%u\n", idx,
- m[i].xres, m[i].yres, m[i].refresh);
- }
- }
-
- kfree(specs->modedb);
- specs->modedb = m;
- specs->modedb_len = specs->modedb_len + num + svd_n;
-}
-
-/*
- * VESA Generalized Timing Formula (GTF)
- */
-
-#define FLYBACK 550
-#define V_FRONTPORCH 1
-#define H_OFFSET 40
-#define H_SCALEFACTOR 20
-#define H_BLANKSCALE 128
-#define H_GRADIENT 600
-#define C_VAL 30
-#define M_VAL 300
-
-struct __fb_timings {
- u32 dclk;
- u32 hfreq;
- u32 vfreq;
- u32 hactive;
- u32 vactive;
- u32 hblank;
- u32 vblank;
- u32 htotal;
- u32 vtotal;
-};
-
-/**
- * fb_get_vblank - get vertical blank time
- * @hfreq: horizontal freq
- *
- * DESCRIPTION:
- * vblank = right_margin + vsync_len + left_margin
- *
- * given: right_margin = 1 (V_FRONTPORCH)
- * vsync_len = 3
- * flyback = 550
- *
- * flyback * hfreq
- * left_margin = --------------- - vsync_len
- * 1000000
- */
-static u32 fb_get_vblank(u32 hfreq)
-{
- u32 vblank;
-
- vblank = (hfreq * FLYBACK)/1000;
- vblank = (vblank + 500)/1000;
- return (vblank + V_FRONTPORCH);
-}
-
-/**
- * fb_get_hblank_by_freq - get horizontal blank time given hfreq
- * @hfreq: horizontal freq
- * @xres: horizontal resolution in pixels
- *
- * DESCRIPTION:
- *
- * xres * duty_cycle
- * hblank = ------------------
- * 100 - duty_cycle
- *
- * duty cycle = percent of htotal assigned to inactive display
- * duty cycle = C - (M/Hfreq)
- *
- * where: C = ((offset - scale factor) * blank_scale)
- * -------------------------------------- + scale factor
- * 256
- * M = blank_scale * gradient
- *
- */
-static u32 fb_get_hblank_by_hfreq(u32 hfreq, u32 xres)
-{
- u32 c_val, m_val, duty_cycle, hblank;
-
- c_val = (((H_OFFSET - H_SCALEFACTOR) * H_BLANKSCALE)/256 +
- H_SCALEFACTOR) * 1000;
- m_val = (H_BLANKSCALE * H_GRADIENT)/256;
- m_val = (m_val * 1000000)/hfreq;
- duty_cycle = c_val - m_val;
- hblank = (xres * duty_cycle)/(100000 - duty_cycle);
- return (hblank);
-}
-
-/**
- * fb_get_hblank_by_dclk - get horizontal blank time given pixelclock
- * @dclk: pixelclock in Hz
- * @xres: horizontal resolution in pixels
- *
- * DESCRIPTION:
- *
- * xres * duty_cycle
- * hblank = ------------------
- * 100 - duty_cycle
- *
- * duty cycle = percent of htotal assigned to inactive display
- * duty cycle = C - (M * h_period)
- *
- * where: h_period = SQRT(100 - C + (0.4 * xres * M)/dclk) + C - 100
- * -----------------------------------------------
- * 2 * M
- * M = 300;
- * C = 30;
-
- */
-static u32 fb_get_hblank_by_dclk(u32 dclk, u32 xres)
-{
- u32 duty_cycle, h_period, hblank;
-
- dclk /= 1000;
- h_period = 100 - C_VAL;
- h_period *= h_period;
- h_period += (M_VAL * xres * 2 * 1000)/(5 * dclk);
- h_period *= 10000;
-
- h_period = int_sqrt(h_period);
- h_period -= (100 - C_VAL) * 100;
- h_period *= 1000;
- h_period /= 2 * M_VAL;
-
- duty_cycle = C_VAL * 1000 - (M_VAL * h_period)/100;
- hblank = (xres * duty_cycle)/(100000 - duty_cycle) + 8;
- hblank &= ~15;
- return (hblank);
-}
-
-/**
- * fb_get_hfreq - estimate hsync
- * @vfreq: vertical refresh rate
- * @yres: vertical resolution
- *
- * DESCRIPTION:
- *
- * (yres + front_port) * vfreq * 1000000
- * hfreq = -------------------------------------
- * (1000000 - (vfreq * FLYBACK)
- *
- */
-
-static u32 fb_get_hfreq(u32 vfreq, u32 yres)
-{
- u32 divisor, hfreq;
-
- divisor = (1000000 - (vfreq * FLYBACK))/1000;
- hfreq = (yres + V_FRONTPORCH) * vfreq * 1000;
- return (hfreq/divisor);
-}
-
-static void fb_timings_vfreq(struct __fb_timings *timings)
-{
- timings->hfreq = fb_get_hfreq(timings->vfreq, timings->vactive);
- timings->vblank = fb_get_vblank(timings->hfreq);
- timings->vtotal = timings->vactive + timings->vblank;
- timings->hblank = fb_get_hblank_by_hfreq(timings->hfreq,
- timings->hactive);
- timings->htotal = timings->hactive + timings->hblank;
- timings->dclk = timings->htotal * timings->hfreq;
-}
-
-static void fb_timings_hfreq(struct __fb_timings *timings)
-{
- timings->vblank = fb_get_vblank(timings->hfreq);
- timings->vtotal = timings->vactive + timings->vblank;
- timings->vfreq = timings->hfreq/timings->vtotal;
- timings->hblank = fb_get_hblank_by_hfreq(timings->hfreq,
- timings->hactive);
- timings->htotal = timings->hactive + timings->hblank;
- timings->dclk = timings->htotal * timings->hfreq;
-}
-
-static void fb_timings_dclk(struct __fb_timings *timings)
-{
- timings->hblank = fb_get_hblank_by_dclk(timings->dclk,
- timings->hactive);
- timings->htotal = timings->hactive + timings->hblank;
- timings->hfreq = timings->dclk/timings->htotal;
- timings->vblank = fb_get_vblank(timings->hfreq);
- timings->vtotal = timings->vactive + timings->vblank;
- timings->vfreq = timings->hfreq/timings->vtotal;
-}
-
-/*
- * fb_get_mode - calculates video mode using VESA GTF
- * @flags: if: 0 - maximize vertical refresh rate
- * 1 - vrefresh-driven calculation;
- * 2 - hscan-driven calculation;
- * 3 - pixelclock-driven calculation;
- * @val: depending on @flags, ignored, vrefresh, hsync or pixelclock
- * @var: pointer to fb_var_screeninfo
- * @info: pointer to fb_info
- *
- * DESCRIPTION:
- * Calculates video mode based on monitor specs using VESA GTF.
- * The GTF is best for VESA GTF compliant monitors but is
- * specifically formulated to work for older monitors as well.
- *
- * If @flag==0, the function will attempt to maximize the
- * refresh rate. Otherwise, it will calculate timings based on
- * the flag and accompanying value.
- *
- * If FB_IGNOREMON bit is set in @flags, monitor specs will be
- * ignored and @var will be filled with the calculated timings.
- *
- * All calculations are based on the VESA GTF Spreadsheet
- * available at VESA's public ftp (http://www.vesa.org).
- *
- * NOTES:
- * The timings generated by the GTF will be different from VESA
- * DMT. It might be a good idea to keep a table of standard
- * VESA modes as well. The GTF may also not work for some displays,
- * such as, and especially, analog TV.
- *
- * REQUIRES:
- * A valid info->monspecs, otherwise 'safe numbers' will be used.
- */
-int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var, struct fb_info *info)
-{
- struct __fb_timings *timings;
- u32 interlace = 1, dscan = 1;
- u32 hfmin, hfmax, vfmin, vfmax, dclkmin, dclkmax, err = 0;
-
-
- timings = kzalloc(sizeof(struct __fb_timings), GFP_KERNEL);
-
- if (!timings)
- return -ENOMEM;
-
- /*
- * If monspecs are invalid, use values that are enough
- * for 640x480@60
- */
- if (!info || !info->monspecs.hfmax || !info->monspecs.vfmax ||
- !info->monspecs.dclkmax ||
- info->monspecs.hfmax < info->monspecs.hfmin ||
- info->monspecs.vfmax < info->monspecs.vfmin ||
- info->monspecs.dclkmax < info->monspecs.dclkmin) {
- hfmin = 29000; hfmax = 30000;
- vfmin = 60; vfmax = 60;
- dclkmin = 0; dclkmax = 25000000;
- } else {
- hfmin = info->monspecs.hfmin;
- hfmax = info->monspecs.hfmax;
- vfmin = info->monspecs.vfmin;
- vfmax = info->monspecs.vfmax;
- dclkmin = info->monspecs.dclkmin;
- dclkmax = info->monspecs.dclkmax;
- }
-
- timings->hactive = var->xres;
- timings->vactive = var->yres;
- if (var->vmode & FB_VMODE_INTERLACED) {
- timings->vactive /= 2;
- interlace = 2;
- }
- if (var->vmode & FB_VMODE_DOUBLE) {
- timings->vactive *= 2;
- dscan = 2;
- }
-
- switch (flags & ~FB_IGNOREMON) {
- case FB_MAXTIMINGS: /* maximize refresh rate */
- timings->hfreq = hfmax;
- fb_timings_hfreq(timings);
- if (timings->vfreq > vfmax) {
- timings->vfreq = vfmax;
- fb_timings_vfreq(timings);
- }
- if (timings->dclk > dclkmax) {
- timings->dclk = dclkmax;
- fb_timings_dclk(timings);
- }
- break;
- case FB_VSYNCTIMINGS: /* vrefresh driven */
- timings->vfreq = val;
- fb_timings_vfreq(timings);
- break;
- case FB_HSYNCTIMINGS: /* hsync driven */
- timings->hfreq = val;
- fb_timings_hfreq(timings);
- break;
- case FB_DCLKTIMINGS: /* pixelclock driven */
- timings->dclk = PICOS2KHZ(val) * 1000;
- fb_timings_dclk(timings);
- break;
- default:
- err = -EINVAL;
-
- }
-
- if (err || (!(flags & FB_IGNOREMON) &&
- (timings->vfreq < vfmin || timings->vfreq > vfmax ||
- timings->hfreq < hfmin || timings->hfreq > hfmax ||
- timings->dclk < dclkmin || timings->dclk > dclkmax))) {
- err = -EINVAL;
- } else {
- var->pixclock = KHZ2PICOS(timings->dclk/1000);
- var->hsync_len = (timings->htotal * 8)/100;
- var->right_margin = (timings->hblank/2) - var->hsync_len;
- var->left_margin = timings->hblank - var->right_margin -
- var->hsync_len;
- var->vsync_len = (3 * interlace)/dscan;
- var->lower_margin = (1 * interlace)/dscan;
- var->upper_margin = (timings->vblank * interlace)/dscan -
- (var->vsync_len + var->lower_margin);
- }
-
- kfree(timings);
- return err;
-}
-#else
-int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var)
-{
- return 1;
-}
-void fb_edid_to_monspecs(unsigned char *edid, struct fb_monspecs *specs)
-{
- specs = NULL;
-}
-void fb_edid_add_monspecs(unsigned char *edid, struct fb_monspecs *specs)
-{
-}
-void fb_destroy_modedb(struct fb_videomode *modedb)
-{
-}
-int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var,
- struct fb_info *info)
-{
- return -EINVAL;
-}
-#endif /* CONFIG_FB_MODE_HELPERS */
-
-/*
- * fb_validate_mode - validates var against monitor capabilities
- * @var: pointer to fb_var_screeninfo
- * @info: pointer to fb_info
- *
- * DESCRIPTION:
- * Validates video mode against monitor capabilities specified in
- * info->monspecs.
- *
- * REQUIRES:
- * A valid info->monspecs.
- */
-int fb_validate_mode(const struct fb_var_screeninfo *var, struct fb_info *info)
-{
- u32 hfreq, vfreq, htotal, vtotal, pixclock;
- u32 hfmin, hfmax, vfmin, vfmax, dclkmin, dclkmax;
-
- /*
- * If monspecs are invalid, use values that are enough
- * for 640x480@60
- */
- if (!info->monspecs.hfmax || !info->monspecs.vfmax ||
- !info->monspecs.dclkmax ||
- info->monspecs.hfmax < info->monspecs.hfmin ||
- info->monspecs.vfmax < info->monspecs.vfmin ||
- info->monspecs.dclkmax < info->monspecs.dclkmin) {
- hfmin = 29000; hfmax = 30000;
- vfmin = 60; vfmax = 60;
- dclkmin = 0; dclkmax = 25000000;
- } else {
- hfmin = info->monspecs.hfmin;
- hfmax = info->monspecs.hfmax;
- vfmin = info->monspecs.vfmin;
- vfmax = info->monspecs.vfmax;
- dclkmin = info->monspecs.dclkmin;
- dclkmax = info->monspecs.dclkmax;
- }
-
- if (!var->pixclock)
- return -EINVAL;
- pixclock = PICOS2KHZ(var->pixclock) * 1000;
-
- 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 (var->vmode & FB_VMODE_INTERLACED)
- vtotal /= 2;
- if (var->vmode & FB_VMODE_DOUBLE)
- vtotal *= 2;
-
- hfreq = pixclock/htotal;
- hfreq = (hfreq + 500) / 1000 * 1000;
-
- vfreq = hfreq/vtotal;
-
- return (vfreq < vfmin || vfreq > vfmax ||
- hfreq < hfmin || hfreq > hfmax ||
- pixclock < dclkmin || pixclock > dclkmax) ?
- -EINVAL : 0;
-}
-
-#if defined(CONFIG_FIRMWARE_EDID) && defined(CONFIG_X86)
-
-/*
- * We need to ensure that the EDID block is only returned for
- * the primary graphics adapter.
- */
-
-const unsigned char *fb_firmware_edid(struct device *device)
-{
- struct pci_dev *dev = NULL;
- struct resource *res = NULL;
- unsigned char *edid = NULL;
-
- if (device)
- dev = to_pci_dev(device);
-
- if (dev)
- res = &dev->resource[PCI_ROM_RESOURCE];
-
- if (res && res->flags & IORESOURCE_ROM_SHADOW)
- edid = edid_info.dummy;
-
- return edid;
-}
-#else
-const unsigned char *fb_firmware_edid(struct device *device)
-{
- return NULL;
-}
-#endif
-EXPORT_SYMBOL(fb_firmware_edid);
-
-EXPORT_SYMBOL(fb_parse_edid);
-EXPORT_SYMBOL(fb_edid_to_monspecs);
-EXPORT_SYMBOL(fb_edid_add_monspecs);
-EXPORT_SYMBOL(fb_get_mode);
-EXPORT_SYMBOL(fb_validate_mode);
-EXPORT_SYMBOL(fb_destroy_modedb);