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Diffstat (limited to 'drivers/video/fbcvt.c')
-rw-r--r--drivers/video/fbcvt.c379
1 files changed, 0 insertions, 379 deletions
diff --git a/drivers/video/fbcvt.c b/drivers/video/fbcvt.c
deleted file mode 100644
index 7cb715dfc0e1..000000000000
--- a/drivers/video/fbcvt.c
+++ /dev/null
@@ -1,379 +0,0 @@
-/*
- * linux/drivers/video/fbcvt.c - VESA(TM) Coordinated Video Timings
- *
- * Copyright (C) 2005 Antonino Daplas <adaplas@pol.net>
- *
- * Based from the VESA(TM) Coordinated Video Timing Generator by
- * Graham Loveridge April 9, 2003 available at
- * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls
- *
- * 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/slab.h>
-
-#define FB_CVT_CELLSIZE 8
-#define FB_CVT_GTF_C 40
-#define FB_CVT_GTF_J 20
-#define FB_CVT_GTF_K 128
-#define FB_CVT_GTF_M 600
-#define FB_CVT_MIN_VSYNC_BP 550
-#define FB_CVT_MIN_VPORCH 3
-#define FB_CVT_MIN_BPORCH 6
-
-#define FB_CVT_RB_MIN_VBLANK 460
-#define FB_CVT_RB_HBLANK 160
-#define FB_CVT_RB_V_FPORCH 3
-
-#define FB_CVT_FLAG_REDUCED_BLANK 1
-#define FB_CVT_FLAG_MARGINS 2
-#define FB_CVT_FLAG_INTERLACED 4
-
-struct fb_cvt_data {
- u32 xres;
- u32 yres;
- u32 refresh;
- u32 f_refresh;
- u32 pixclock;
- u32 hperiod;
- u32 hblank;
- u32 hfreq;
- u32 htotal;
- u32 vtotal;
- u32 vsync;
- u32 hsync;
- u32 h_front_porch;
- u32 h_back_porch;
- u32 v_front_porch;
- u32 v_back_porch;
- u32 h_margin;
- u32 v_margin;
- u32 interlace;
- u32 aspect_ratio;
- u32 active_pixels;
- u32 flags;
- u32 status;
-};
-
-static const unsigned char fb_cvt_vbi_tab[] = {
- 4, /* 4:3 */
- 5, /* 16:9 */
- 6, /* 16:10 */
- 7, /* 5:4 */
- 7, /* 15:9 */
- 8, /* reserved */
- 9, /* reserved */
- 10 /* custom */
-};
-
-/* returns hperiod * 1000 */
-static u32 fb_cvt_hperiod(struct fb_cvt_data *cvt)
-{
- u32 num = 1000000000/cvt->f_refresh;
- u32 den;
-
- if (cvt->flags & FB_CVT_FLAG_REDUCED_BLANK) {
- num -= FB_CVT_RB_MIN_VBLANK * 1000;
- den = 2 * (cvt->yres/cvt->interlace + 2 * cvt->v_margin);
- } else {
- num -= FB_CVT_MIN_VSYNC_BP * 1000;
- den = 2 * (cvt->yres/cvt->interlace + cvt->v_margin * 2
- + FB_CVT_MIN_VPORCH + cvt->interlace/2);
- }
-
- return 2 * (num/den);
-}
-
-/* returns ideal duty cycle * 1000 */
-static u32 fb_cvt_ideal_duty_cycle(struct fb_cvt_data *cvt)
-{
- u32 c_prime = (FB_CVT_GTF_C - FB_CVT_GTF_J) *
- (FB_CVT_GTF_K) + 256 * FB_CVT_GTF_J;
- u32 m_prime = (FB_CVT_GTF_K * FB_CVT_GTF_M);
- u32 h_period_est = cvt->hperiod;
-
- return (1000 * c_prime - ((m_prime * h_period_est)/1000))/256;
-}
-
-static u32 fb_cvt_hblank(struct fb_cvt_data *cvt)
-{
- u32 hblank = 0;
-
- if (cvt->flags & FB_CVT_FLAG_REDUCED_BLANK)
- hblank = FB_CVT_RB_HBLANK;
- else {
- u32 ideal_duty_cycle = fb_cvt_ideal_duty_cycle(cvt);
- u32 active_pixels = cvt->active_pixels;
-
- if (ideal_duty_cycle < 20000)
- hblank = (active_pixels * 20000)/
- (100000 - 20000);
- else {
- hblank = (active_pixels * ideal_duty_cycle)/
- (100000 - ideal_duty_cycle);
- }
- }
-
- hblank &= ~((2 * FB_CVT_CELLSIZE) - 1);
-
- return hblank;
-}
-
-static u32 fb_cvt_hsync(struct fb_cvt_data *cvt)
-{
- u32 hsync;
-
- if (cvt->flags & FB_CVT_FLAG_REDUCED_BLANK)
- hsync = 32;
- else
- hsync = (FB_CVT_CELLSIZE * cvt->htotal)/100;
-
- hsync &= ~(FB_CVT_CELLSIZE - 1);
- return hsync;
-}
-
-static u32 fb_cvt_vbi_lines(struct fb_cvt_data *cvt)
-{
- u32 vbi_lines, min_vbi_lines, act_vbi_lines;
-
- if (cvt->flags & FB_CVT_FLAG_REDUCED_BLANK) {
- vbi_lines = (1000 * FB_CVT_RB_MIN_VBLANK)/cvt->hperiod + 1;
- min_vbi_lines = FB_CVT_RB_V_FPORCH + cvt->vsync +
- FB_CVT_MIN_BPORCH;
-
- } else {
- vbi_lines = (FB_CVT_MIN_VSYNC_BP * 1000)/cvt->hperiod + 1 +
- FB_CVT_MIN_VPORCH;
- min_vbi_lines = cvt->vsync + FB_CVT_MIN_BPORCH +
- FB_CVT_MIN_VPORCH;
- }
-
- if (vbi_lines < min_vbi_lines)
- act_vbi_lines = min_vbi_lines;
- else
- act_vbi_lines = vbi_lines;
-
- return act_vbi_lines;
-}
-
-static u32 fb_cvt_vtotal(struct fb_cvt_data *cvt)
-{
- u32 vtotal = cvt->yres/cvt->interlace;
-
- vtotal += 2 * cvt->v_margin + cvt->interlace/2 + fb_cvt_vbi_lines(cvt);
- vtotal |= cvt->interlace/2;
-
- return vtotal;
-}
-
-static u32 fb_cvt_pixclock(struct fb_cvt_data *cvt)
-{
- u32 pixclock;
-
- if (cvt->flags & FB_CVT_FLAG_REDUCED_BLANK)
- pixclock = (cvt->f_refresh * cvt->vtotal * cvt->htotal)/1000;
- else
- pixclock = (cvt->htotal * 1000000)/cvt->hperiod;
-
- pixclock /= 250;
- pixclock *= 250;
- pixclock *= 1000;
-
- return pixclock;
-}
-
-static u32 fb_cvt_aspect_ratio(struct fb_cvt_data *cvt)
-{
- u32 xres = cvt->xres;
- u32 yres = cvt->yres;
- u32 aspect = -1;
-
- if (xres == (yres * 4)/3 && !((yres * 4) % 3))
- aspect = 0;
- else if (xres == (yres * 16)/9 && !((yres * 16) % 9))
- aspect = 1;
- else if (xres == (yres * 16)/10 && !((yres * 16) % 10))
- aspect = 2;
- else if (xres == (yres * 5)/4 && !((yres * 5) % 4))
- aspect = 3;
- else if (xres == (yres * 15)/9 && !((yres * 15) % 9))
- aspect = 4;
- else {
- printk(KERN_INFO "fbcvt: Aspect ratio not CVT "
- "standard\n");
- aspect = 7;
- cvt->status = 1;
- }
-
- return aspect;
-}
-
-static void fb_cvt_print_name(struct fb_cvt_data *cvt)
-{
- u32 pixcount, pixcount_mod;
- int cnt = 255, offset = 0, read = 0;
- u8 *buf = kzalloc(256, GFP_KERNEL);
-
- if (!buf)
- return;
-
- pixcount = (cvt->xres * (cvt->yres/cvt->interlace))/1000000;
- pixcount_mod = (cvt->xres * (cvt->yres/cvt->interlace)) % 1000000;
- pixcount_mod /= 1000;
-
- read = snprintf(buf+offset, cnt, "fbcvt: %dx%d@%d: CVT Name - ",
- cvt->xres, cvt->yres, cvt->refresh);
- offset += read;
- cnt -= read;
-
- if (cvt->status)
- snprintf(buf+offset, cnt, "Not a CVT standard - %d.%03d Mega "
- "Pixel Image\n", pixcount, pixcount_mod);
- else {
- if (pixcount) {
- read = snprintf(buf+offset, cnt, "%d", pixcount);
- cnt -= read;
- offset += read;
- }
-
- read = snprintf(buf+offset, cnt, ".%03dM", pixcount_mod);
- cnt -= read;
- offset += read;
-
- if (cvt->aspect_ratio == 0)
- read = snprintf(buf+offset, cnt, "3");
- else if (cvt->aspect_ratio == 3)
- read = snprintf(buf+offset, cnt, "4");
- else if (cvt->aspect_ratio == 1 || cvt->aspect_ratio == 4)
- read = snprintf(buf+offset, cnt, "9");
- else if (cvt->aspect_ratio == 2)
- read = snprintf(buf+offset, cnt, "A");
- else
- read = 0;
- cnt -= read;
- offset += read;
-
- if (cvt->flags & FB_CVT_FLAG_REDUCED_BLANK) {
- read = snprintf(buf+offset, cnt, "-R");
- cnt -= read;
- offset += read;
- }
- }
-
- printk(KERN_INFO "%s\n", buf);
- kfree(buf);
-}
-
-static void fb_cvt_convert_to_mode(struct fb_cvt_data *cvt,
- struct fb_videomode *mode)
-{
- mode->refresh = cvt->f_refresh;
- mode->pixclock = KHZ2PICOS(cvt->pixclock/1000);
- mode->left_margin = cvt->h_back_porch;
- mode->right_margin = cvt->h_front_porch;
- mode->hsync_len = cvt->hsync;
- mode->upper_margin = cvt->v_back_porch;
- mode->lower_margin = cvt->v_front_porch;
- mode->vsync_len = cvt->vsync;
-
- mode->sync &= ~(FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT);
-
- if (cvt->flags & FB_CVT_FLAG_REDUCED_BLANK)
- mode->sync |= FB_SYNC_HOR_HIGH_ACT;
- else
- mode->sync |= FB_SYNC_VERT_HIGH_ACT;
-}
-
-/*
- * fb_find_mode_cvt - calculate mode using VESA(TM) CVT
- * @mode: pointer to fb_videomode; xres, yres, refresh and vmode must be
- * pre-filled with the desired values
- * @margins: add margin to calculation (1.8% of xres and yres)
- * @rb: compute with reduced blanking (for flatpanels)
- *
- * RETURNS:
- * 0 for success
- * @mode is filled with computed values. If interlaced, the refresh field
- * will be filled with the field rate (2x the frame rate)
- *
- * DESCRIPTION:
- * Computes video timings using VESA(TM) Coordinated Video Timings
- */
-int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb)
-{
- struct fb_cvt_data cvt;
-
- memset(&cvt, 0, sizeof(cvt));
-
- if (margins)
- cvt.flags |= FB_CVT_FLAG_MARGINS;
-
- if (rb)
- cvt.flags |= FB_CVT_FLAG_REDUCED_BLANK;
-
- if (mode->vmode & FB_VMODE_INTERLACED)
- cvt.flags |= FB_CVT_FLAG_INTERLACED;
-
- cvt.xres = mode->xres;
- cvt.yres = mode->yres;
- cvt.refresh = mode->refresh;
- cvt.f_refresh = cvt.refresh;
- cvt.interlace = 1;
-
- if (!cvt.xres || !cvt.yres || !cvt.refresh) {
- printk(KERN_INFO "fbcvt: Invalid input parameters\n");
- return 1;
- }
-
- if (!(cvt.refresh == 50 || cvt.refresh == 60 || cvt.refresh == 70 ||
- cvt.refresh == 85)) {
- printk(KERN_INFO "fbcvt: Refresh rate not CVT "
- "standard\n");
- cvt.status = 1;
- }
-
- cvt.xres &= ~(FB_CVT_CELLSIZE - 1);
-
- if (cvt.flags & FB_CVT_FLAG_INTERLACED) {
- cvt.interlace = 2;
- cvt.f_refresh *= 2;
- }
-
- if (cvt.flags & FB_CVT_FLAG_REDUCED_BLANK) {
- if (cvt.refresh != 60) {
- printk(KERN_INFO "fbcvt: 60Hz refresh rate "
- "advised for reduced blanking\n");
- cvt.status = 1;
- }
- }
-
- if (cvt.flags & FB_CVT_FLAG_MARGINS) {
- cvt.h_margin = (cvt.xres * 18)/1000;
- cvt.h_margin &= ~(FB_CVT_CELLSIZE - 1);
- cvt.v_margin = ((cvt.yres/cvt.interlace)* 18)/1000;
- }
-
- cvt.aspect_ratio = fb_cvt_aspect_ratio(&cvt);
- cvt.active_pixels = cvt.xres + 2 * cvt.h_margin;
- cvt.hperiod = fb_cvt_hperiod(&cvt);
- cvt.vsync = fb_cvt_vbi_tab[cvt.aspect_ratio];
- cvt.vtotal = fb_cvt_vtotal(&cvt);
- cvt.hblank = fb_cvt_hblank(&cvt);
- cvt.htotal = cvt.active_pixels + cvt.hblank;
- cvt.hsync = fb_cvt_hsync(&cvt);
- cvt.pixclock = fb_cvt_pixclock(&cvt);
- cvt.hfreq = cvt.pixclock/cvt.htotal;
- cvt.h_back_porch = cvt.hblank/2 + cvt.h_margin;
- cvt.h_front_porch = cvt.hblank - cvt.hsync - cvt.h_back_porch +
- 2 * cvt.h_margin;
- cvt.v_back_porch = 3 + cvt.v_margin;
- cvt.v_front_porch = cvt.vtotal - cvt.yres/cvt.interlace -
- cvt.v_back_porch - cvt.vsync;
- fb_cvt_print_name(&cvt);
- fb_cvt_convert_to_mode(&cvt, mode);
-
- return 0;
-}
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