Commit e80987f8 authored by Antonino A. Daplas's avatar Antonino A. Daplas Committed by Linus Torvalds
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[PATCH] i810fb: Use generic DDC reading



Update driver to use generic DDC reading
Signed-off-by: default avatarAntonino Daplas <adaplas@pol.net>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent bf5df0a2
......@@ -829,6 +829,7 @@ config FB_I810_I2C
depends on FB_I810 && FB_I810_GTF
select I2C
select I2C_ALGOBIT
select FB_DDC
help
config FB_INTEL
......
......@@ -19,7 +19,6 @@
#include "i810_main.h"
#include "../edid.h"
#define I810_DDC 0x50
/* bit locations in the registers */
#define SCL_DIR_MASK 0x0001
#define SCL_DIR 0x0002
......@@ -150,53 +149,14 @@ void i810_delete_i2c_busses(struct i810fb_par *par)
par->chan[2].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+1);
if (conn < par->ddc_num) {
for (i = 0; i < 3; i++) {
/* Do the real work */
edid = i810_do_probe_i2c_edid(&par->chan[conn]);
if (edid)
break;
}
edid = fb_ddc_read(&par->chan[conn].adapter);
} else {
const u8 *e = fb_firmware_edid(info->device);
......
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