geemili
/
drm
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Synchronize the DDC EDID read to it's fb_ddc.c counterpart

main
Alan Hourihane 2008-07-07 15:11:48 +01:00
parent d5d3f31b10
commit 0b7d9a97bd
1 changed files with 2 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
linux-core/drm_edid.c
View File

@ -595,21 +595,13 @@ static unsigned char *drm_ddc_read(struct i2c_adapter *adapter)
unsigned char *edid = NULL; unsigned char *edid = NULL;
int i, j; int i, j;
/*
* Startup the bus:
* Set clock line high (but give it time to come up)
* Then set clock & data low
*/
algo_data->setscl(algo_data->data, 1); algo_data->setscl(algo_data->data, 1);
udelay(550); /* startup delay */
algo_data->setscl(algo_data->data, 0);
algo_data->setsda(algo_data->data, 0);
for (i = 0; i < 3; i++) { for (i = 0; i < 3; i++) {
/* For some old monitors we need the /* For some old monitors we need the
* following process to initialize/stop DDC * following process to initialize/stop DDC
*/ */
algo_data->setsda(algo_data->data, 0); algo_data->setsda(algo_data->data, 1);
msleep(13); msleep(13);
algo_data->setscl(algo_data->data, 1); algo_data->setscl(algo_data->data, 1);
@ -644,6 +636,7 @@ static unsigned char *drm_ddc_read(struct i2c_adapter *adapter)
algo_data->setsda(algo_data->data, 1); algo_data->setsda(algo_data->data, 1);
msleep(15); msleep(15);
algo_data->setscl(algo_data->data, 0); algo_data->setscl(algo_data->data, 0);
algo_data->setsda(algo_data->data, 0);
if (edid) if (edid)
break; break;
} }