If unsure, say N.
+config FB_I810_I2C
+ bool "Enable DDC Support"
+ depends on FB_I810 && I2C && FB_I810_GTF
+ select I2C_ALGOBIT
+ help
+
config FB_INTEL
tristate "Intel 830M/845G/852GM/855GM/865G support (EXPERIMENTAL)"
depends on FB && EXPERIMENTAL && PCI && X86 && !X86_64
obj-$(CONFIG_FB_I810) += i810fb.o
-
i810fb-objs := i810_main.o i810_accel.o
ifdef CONFIG_FB_I810_GTF
else
i810fb-objs += i810_dvt.o
endif
+
+ifdef CONFIG_FB_I810_I2C
+i810fb-objs += i810-i2c.o
+endif
--- /dev/null
+ /*-*- linux-c -*-
+ * linux/drivers/video/i810-i2c.c -- Intel 810/815 I2C support
+ *
+ * Copyright (C) 2004 Antonino Daplas<adaplas@pol.net>
+ * All Rights Reserved
+ *
+ * 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/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/fb.h>
+#include "i810.h"
+#include "i810_regs.h"
+#include "../edid.h"
+
+#define I810_DDC 0x50
+/* bit locations in the registers */
+#define SCL_DIR_MASK 0x0001
+#define SCL_DIR 0x0002
+#define SCL_VAL_MASK 0x0004
+#define SCL_VAL_OUT 0x0008
+#define SCL_VAL_IN 0x0010
+#define SDA_DIR_MASK 0x0100
+#define SDA_DIR 0x0200
+#define SDA_VAL_MASK 0x0400
+#define SDA_VAL_OUT 0x0800
+#define SDA_VAL_IN 0x1000
+
+#define DEBUG /* define this for verbose EDID parsing output */
+
+#ifdef DEBUG
+#define DPRINTK(fmt, args...) printk(fmt,## args)
+#else
+#define DPRINTK(fmt, args...)
+#endif
+
+static void i810i2c_setscl(void *data, int state)
+{
+ struct i810fb_i2c_chan *chan = (struct i810fb_i2c_chan *)data;
+ struct i810fb_par *par = chan->par;
+ u8 *mmio = par->mmio_start_virtual;
+
+ i810_writel(mmio, GPIOB, (state ? SCL_VAL_OUT : 0) | SCL_DIR |
+ SCL_DIR_MASK | SCL_VAL_MASK);
+ i810_readl(mmio, GPIOB); /* flush posted write */
+}
+
+static void i810i2c_setsda(void *data, int state)
+{
+ struct i810fb_i2c_chan *chan = (struct i810fb_i2c_chan *)data;
+ struct i810fb_par *par = chan->par;
+ u8 *mmio = par->mmio_start_virtual;
+
+ i810_writel(mmio, GPIOB, (state ? SDA_VAL_OUT : 0) | SDA_DIR |
+ SDA_DIR_MASK | SDA_VAL_MASK);
+ i810_readl(mmio, GPIOB); /* flush posted write */
+}
+
+static int i810i2c_getscl(void *data)
+{
+ struct i810fb_i2c_chan *chan = (struct i810fb_i2c_chan *)data;
+ struct i810fb_par *par = chan->par;
+ u8 *mmio = par->mmio_start_virtual;
+
+ i810_writel(mmio, GPIOB, SCL_DIR_MASK);
+ i810_writel(mmio, GPIOB, 0);
+ return (0 != (i810_readl(mmio, GPIOB) & SCL_VAL_IN));
+}
+
+static int i810i2c_getsda(void *data)
+{
+ struct i810fb_i2c_chan *chan = (struct i810fb_i2c_chan *)data;
+ struct i810fb_par *par = chan->par;
+ u8 *mmio = par->mmio_start_virtual;
+
+ i810_writel(mmio, GPIOB, SDA_DIR_MASK);
+ i810_writel(mmio, GPIOB, 0);
+ return (0 != (i810_readl(mmio, GPIOB) & SDA_VAL_IN));
+}
+
+static void i810ddc_setscl(void *data, int state)
+{
+ struct i810fb_i2c_chan *chan = (struct i810fb_i2c_chan *)data;
+ struct i810fb_par *par = chan->par;
+ u8 *mmio = par->mmio_start_virtual;
+
+ i810_writel(mmio, GPIOA, (state ? SCL_VAL_OUT : 0) | SCL_DIR |
+ SCL_DIR_MASK | SCL_VAL_MASK);
+ i810_readl(mmio, GPIOA); /* flush posted write */
+}
+
+static void i810ddc_setsda(void *data, int state)
+{
+ struct i810fb_i2c_chan *chan = (struct i810fb_i2c_chan *)data;
+ struct i810fb_par *par = chan->par;
+ u8 *mmio = par->mmio_start_virtual;
+
+ i810_writel(mmio, GPIOA, (state ? SDA_VAL_OUT : 0) | SDA_DIR |
+ SDA_DIR_MASK | SDA_VAL_MASK);
+ i810_readl(mmio, GPIOA); /* flush posted write */
+}
+
+static int i810ddc_getscl(void *data)
+{
+ struct i810fb_i2c_chan *chan = (struct i810fb_i2c_chan *)data;
+ struct i810fb_par *par = chan->par;
+ u8 *mmio = par->mmio_start_virtual;
+
+ i810_writel(mmio, GPIOA, SCL_DIR_MASK);
+ i810_writel(mmio, GPIOA, 0);
+ return (0 != (i810_readl(mmio, GPIOA) & SCL_VAL_IN));
+}
+
+static int i810ddc_getsda(void *data)
+{
+ struct i810fb_i2c_chan *chan = (struct i810fb_i2c_chan *)data;
+ struct i810fb_par *par = chan->par;
+ u8 *mmio = par->mmio_start_virtual;
+
+ i810_writel(mmio, GPIOA, SDA_DIR_MASK);
+ i810_writel(mmio, GPIOA, 0);
+ return (0 != (i810_readl(mmio, GPIOA) & SDA_VAL_IN));
+}
+
+#define I2C_ALGO_DDC_I810 0x0e0000
+#define I2C_ALGO_I2C_I810 0x0f0000
+static int i810_setup_i2c_bus(struct i810fb_i2c_chan *chan, const char *name,
+ int conn)
+{
+ int rc;
+
+ strcpy(chan->adapter.name, name);
+ chan->adapter.owner = THIS_MODULE;
+ chan->adapter.algo_data = &chan->algo;
+ chan->adapter.dev.parent = &chan->par->dev->dev;
+ switch (conn) {
+ case 1:
+ chan->adapter.id = I2C_ALGO_DDC_I810;
+ chan->algo.setsda = i810ddc_setsda;
+ chan->algo.setscl = i810ddc_setscl;
+ chan->algo.getsda = i810ddc_getsda;
+ chan->algo.getscl = i810ddc_getscl;
+ break;
+ case 2:
+ chan->adapter.id = I2C_ALGO_I2C_I810;
+ chan->algo.setsda = i810i2c_setsda;
+ chan->algo.setscl = i810i2c_setscl;
+ chan->algo.getsda = i810i2c_getsda;
+ chan->algo.getscl = i810i2c_getscl;
+ break;
+ }
+ chan->algo.udelay = 10;
+ chan->algo.mdelay = 10;
+ chan->algo.timeout = (HZ/2);
+ chan->algo.data = chan;
+
+ i2c_set_adapdata(&chan->adapter, chan);
+
+ /* Raise SCL and SDA */
+ chan->algo.setsda(chan, 1);
+ chan->algo.setscl(chan, 1);
+ udelay(20);
+
+ rc = i2c_bit_add_bus(&chan->adapter);
+ if (rc == 0)
+ dev_dbg(&chan->par->dev->dev, "I2C bus %s registered.\n",name);
+ else
+ dev_warn(&chan->par->dev->dev, "Failed to register I2C bus "
+ "%s.\n", name);
+ return rc;
+}
+
+void i810_create_i2c_busses(struct i810fb_par *par)
+{
+ par->chan[0].par = par;
+ par->chan[1].par = par;
+ i810_setup_i2c_bus(&par->chan[0], "I810-DDC", 1);
+ i810_setup_i2c_bus(&par->chan[1], "I810-I2C", 2);
+}
+
+void i810_delete_i2c_busses(struct i810fb_par *par)
+{
+ if (par->chan[0].par)
+ i2c_bit_del_bus(&par->chan[0].adapter);
+ par->chan[0].par = NULL;
+ if (par->chan[1].par)
+ i2c_bit_del_bus(&par->chan[1].adapter);
+ par->chan[1].par = NULL;
+}
+
+static u8 *i810_do_probe_i2c_edid(struct i810fb_i2c_chan *chan)
+{
+ u8 start = 0x0;
+ struct i2c_msg msgs[] = {
+ {
+ .addr = I810_DDC,
+ .len = 1,
+ .buf = &start,
+ }, {
+ .addr = I810_DDC,
+ .flags = I2C_M_RD,
+ .len = EDID_LENGTH,
+ },
+ };
+ u8 *buf;
+
+ buf = kmalloc(EDID_LENGTH, GFP_KERNEL);
+ if (!buf) {
+ DPRINTK("i810-i2c: Failed to allocate memory\n");
+ return NULL;
+ }
+ msgs[1].buf = buf;
+
+ if (i2c_transfer(&chan->adapter, msgs, 2) == 2) {
+ DPRINTK("i810-i2c: I2C Transfer successful\n");
+ return buf;
+ }
+ DPRINTK("i810-i2c: Unable to read EDID block.\n");
+ kfree(buf);
+ return NULL;
+}
+
+int i810_probe_i2c_connector(struct fb_info *info, u8 **out_edid, int conn)
+{
+ struct i810fb_par *par = info->par;
+ u8 *edid = NULL;
+ int i;
+
+ DPRINTK("i810-i2c: Probe DDC%i Bus\n", conn);
+ if (conn < 3) {
+ for (i = 0; i < 3; i++) {
+ /* Do the real work */
+ edid = i810_do_probe_i2c_edid(&par->chan[conn-1]);
+ if (edid)
+ break;
+ }
+ } else {
+ DPRINTK("i810-i2c: Getting EDID from BIOS\n");
+ edid = kmalloc(EDID_LENGTH, GFP_KERNEL);
+ if (edid)
+ memcpy(edid, fb_firmware_edid(info->device),
+ EDID_LENGTH);
+ }
+
+ if (out_edid)
+ *out_edid = edid;
+
+ return (edid) ? 0 : 1;
+}
+
+
#include <linux/list.h>
#include <linux/agp_backend.h>
#include <linux/fb.h>
+#include <linux/i2c.h>
+#include <linux/i2c-id.h>
+#include <linux/i2c-algo-bit.h>
#include <video/vga.h>
/* Fence */
u8 cr39, cr41, cr70, sr01, msr;
};
+struct i810fb_par;
+
+struct i810fb_i2c_chan {
+ struct i810fb_par *par;
+ struct i2c_adapter adapter;
+ struct i2c_algo_bit_data algo;
+};
+
struct i810fb_par {
struct mode_registers regs;
struct state_registers hw_state;
struct heap_data iring;
struct heap_data cursor_heap;
struct vgastate state;
+ struct i810fb_i2c_chan chan[2];
atomic_t use_count;
u32 pseudo_palette[17];
unsigned long mmio_start_phys;
u8 __iomem *mmio_start_virtual;
+ u8 *edid;
u32 pitch;
u32 pixconf;
u32 watermark;
.resume = i810fb_resume,
};
-static int vram __initdata = 4;
-static int bpp __initdata = 8;
-static int mtrr __initdata = 0;
-static int accel __initdata = 0;
-static int hsync1 __initdata = 0;
-static int hsync2 __initdata = 0;
-static int vsync1 __initdata = 0;
-static int vsync2 __initdata = 0;
-static int xres __initdata = 640;
-static int yres __initdata = 480;
-static int vyres __initdata = 0;
-static int sync __initdata = 0;
-static int ext_vga __initdata = 0;
-static int dcolor __initdata = 0;
+static char *mode_option __devinitdata = NULL;
+static int vram __devinitdata = 4;
+static int bpp __devinitdata = 8;
+static int mtrr __devinitdata = 0;
+static int accel __devinitdata = 0;
+static int hsync1 __devinitdata = 0;
+static int hsync2 __devinitdata = 0;
+static int vsync1 __devinitdata = 0;
+static int vsync2 __devinitdata = 0;
+static int xres __devinitdata = 640;
+static int yres __devinitdata = 480;
+static int vyres __devinitdata = 0;
+static int sync __devinitdata = 0;
+static int ext_vga __devinitdata = 0;
+static int dcolor __devinitdata = 0;
/*------------------------------------------------------------*/
struct fb_info *info)
{
struct i810fb_par *par = (struct i810fb_par *) info->par;
- int line_length, vidmem;
- u32 xres, yres, vxres, vyres;
-
- xres = var->xres;
- yres = var->yres;
- vxres = var->xres_virtual;
- vyres = var->yres_virtual;
-
+ int line_length, vidmem, mode_valid = 0;
+ u32 vyres = var->yres_virtual, vxres = var->xres_virtual;
/*
* Memory limit
*/
- line_length = get_line_length(par, vxres,
- var->bits_per_pixel);
-
+ line_length = get_line_length(par, vxres, var->bits_per_pixel);
vidmem = line_length*vyres;
+
if (vidmem > par->fb.size) {
vyres = par->fb.size/line_length;
- if (vyres < yres) {
+ if (vyres < var->yres) {
vyres = yres;
vxres = par->fb.size/vyres;
vxres /= var->bits_per_pixel >> 3;
line_length = get_line_length(par, vxres,
var->bits_per_pixel);
vidmem = line_length * yres;
- if (vxres < xres) {
+ if (vxres < var->xres) {
printk("i810fb: required video memory, "
"%d bytes, for %dx%d-%d (virtual) "
"is out of range\n",
}
}
}
+
+ var->xres_virtual = vxres;
+ var->yres_virtual = vyres;
+
/*
* Monitor limit
*/
info->monspecs.dclkmax = 204000000;
break;
}
+
info->monspecs.dclkmin = 15000000;
- if (fb_validate_mode(var, info)) {
+ if (!fb_validate_mode(var, info))
+ mode_valid = 1;
+
+#ifdef CONFIG_FB_I810_I2C
+ if (!mode_valid && info->monspecs.gtf &&
+ !fb_get_mode(FB_MAXTIMINGS, 0, var, info))
+ mode_valid = 1;
+
+ if (!mode_valid && info->monspecs.modedb_len) {
+ struct fb_videomode *mode;
+
+ mode = fb_find_best_mode(var, &info->modelist);
+ if (mode) {
+ fb_videomode_to_var(var, mode);
+ mode_valid = 1;
+ }
+ }
+#endif
+ if (!mode_valid && info->monspecs.modedb_len == 0) {
if (fb_get_mode(FB_MAXTIMINGS, 0, var, info)) {
int default_sync = (info->monspecs.hfmin-HFMIN)
- |(info->monspecs.hfmax-HFMAX)
- |(info->monspecs.vfmin-VFMIN)
- |(info->monspecs.vfmax-VFMAX);
+ |(info->monspecs.hfmax-HFMAX)
+ |(info->monspecs.vfmin-VFMIN)
+ |(info->monspecs.vfmax-VFMAX);
printk("i810fb: invalid video mode%s\n",
- default_sync ? "" :
- ". Specifying vsyncN/hsyncN parameters may help");
- return -EINVAL;
+ default_sync ? "" : ". Specifying "
+ "vsyncN/hsyncN parameters may help");
}
}
-
- var->xres = xres;
- var->yres = yres;
- var->xres_virtual = vxres;
- var->yres_virtual = vyres;
+
return 0;
}
return 0;
}
+static void __devinit i810fb_find_init_mode(struct fb_info *info)
+{
+ struct fb_videomode mode;
+ struct fb_var_screeninfo var;
+ struct fb_monspecs *specs = NULL;
+ int found = 0;
+#ifdef CONFIG_FB_I810_I2C
+ int i;
+ int err;
+ struct i810fb_par *par = info->par;
+#endif
+
+ INIT_LIST_HEAD(&info->modelist);
+ memset(&mode, 0, sizeof(struct fb_videomode));
+ var = info->var;
+#ifdef CONFIG_FB_I810_I2C
+ i810_create_i2c_busses(par);
+
+ for (i = 0; i < 3; i++) {
+ err = i810_probe_i2c_connector(info, &par->edid, i+1);
+ if (!err)
+ break;
+ }
+
+ if (!err)
+ printk("i810fb_init_pci: DDC probe successful\n");
+
+ fb_edid_to_monspecs(par->edid, &info->monspecs);
+
+ if (info->monspecs.modedb == NULL)
+ printk("i810fb_init_pci: Unable to get Mode Database\n");
+
+ specs = &info->monspecs;
+ fb_videomode_to_modelist(specs->modedb, specs->modedb_len,
+ &info->modelist);
+ if (specs->modedb != NULL) {
+ if (specs->misc & FB_MISC_1ST_DETAIL) {
+ for (i = 0; i < specs->modedb_len; i++) {
+ if (specs->modedb[i].flag & FB_MODE_IS_FIRST) {
+ mode = specs->modedb[i];
+ found = 1;
+ break;
+ }
+ }
+ }
+
+ if (!found) {
+ mode = specs->modedb[0];
+ found = 1;
+ }
+
+ fb_videomode_to_var(&var, &mode);
+ }
+#endif
+ if (mode_option)
+ fb_find_mode(&var, info, mode_option, specs->modedb,
+ specs->modedb_len, (found) ? &mode : NULL,
+ info->var.bits_per_pixel);
+
+ info->var = var;
+ fb_destroy_modedb(specs->modedb);
+ specs->modedb = NULL;
+}
+
#ifndef MODULE
-static int __init i810fb_setup(char *options)
+static int __devinit i810fb_setup(char *options)
{
char *this_opt, *suffix = NULL;
vsync2 = simple_strtoul(this_opt+7, NULL, 0);
else if (!strncmp(this_opt, "dcolor", 6))
dcolor = 1;
+ else
+ mode_option = this_opt;
}
return 0;
}
{
struct fb_info *info;
struct i810fb_par *par = NULL;
+ struct fb_videomode mode;
int i, err = -1, vfreq, hfreq, pixclock;
i = 0;
if (!info)
return -ENOMEM;
- par = (struct i810fb_par *) info->par;
+ par = info->par;
par->dev = dev;
if (!(info->pixmap.addr = kmalloc(8*1024, GFP_KERNEL))) {
info->fbops = &par->i810fb_ops;
info->pseudo_palette = par->pseudo_palette;
fb_alloc_cmap(&info->cmap, 256, 0);
+ i810fb_find_init_mode(info);
if ((err = info->fbops->fb_check_var(&info->var, info))) {
i810fb_release_resource(info, par);
return err;
}
+
+ fb_var_to_videomode(&mode, &info->var);
+ fb_add_videomode(&mode, &info->modelist);
encode_fix(&info->fix, info);
i810fb_init_ringbuffer(info);
err = register_framebuffer(info);
+
if (err < 0) {
i810fb_release_resource(info, par);
printk("i810fb_init: cannot register framebuffer device\n");
struct gtt_data *gtt = &par->i810_gtt;
unset_mtrr(par);
+ i810_delete_i2c_busses(par);
+
if (par->i810_gtt.i810_cursor_memory)
agp_free_memory(gtt->i810_cursor_memory);
if (par->i810_gtt.i810_fb_memory)
iounmap(par->mmio_start_virtual);
if (par->aperture.virtual)
iounmap(par->aperture.virtual);
-
+ if (par->edid)
+ kfree(par->edid);
if (par->res_flags & FRAMEBUFFER_REQ)
release_mem_region(par->aperture.physical,
par->aperture.size);
}
#ifndef MODULE
-static int __init i810fb_init(void)
+static int __devinit i810fb_init(void)
{
char *option = NULL;
#ifdef MODULE
-static int __init i810fb_init(void)
+static int __devinit i810fb_init(void)
{
hsync1 *= 1000;
hsync2 *= 1000;
module_param(dcolor, bool, 0);
MODULE_PARM_DESC(dcolor, "use DirectColor visuals"
" (default = 0 = TrueColor)");
+module_param(mode_option, charp, 0);
+MODULE_PARM_DESC(mode_option, "Specify initial video mode");
MODULE_AUTHOR("Tony A. Daplas");
MODULE_DESCRIPTION("Framebuffer device for the Intel 810/815 and"
extern void i810fb_init_ringbuffer(struct fb_info *info);
extern void i810fb_load_front (u32 offset, struct fb_info *info);
+#ifdef CONFIG_FB_I810_I2C
+/* I2C */
+extern int i810_probe_i2c_connector(struct fb_info *info, u8 **out_edid,
+ int conn);
+extern void i810_create_i2c_busses(struct i810fb_par *par);
+extern void i810_delete_i2c_busses(struct i810fb_par *par);
+#else
+static inline int i810_probe_i2c_connector(struct fb_info *info, u8 **out_edid,
+ int conn)
+{
+ return 1;
+}
+static inline void i810_create_i2c_busses(struct i810fb_par *par) { }
+static inline void i810_delete_i2c_busses(struct i810fb_par *par) { }
+#endif
+
/* Conditionals */
#ifdef CONFIG_X86
inline void flush_cache(void)
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff