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[media] adv7842: clear edid, if no edid just disable Edid-DDC access 

Signed-off-by: Martin Bugge <marbugge@cisco.com>
Cc: Mats Randgaard <matrandg@cisco.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Martin Bugge 2013-12-05 12:09:51 -03:00 committed by Mauro Carvalho Chehab
parent 5b64b20539
commit fc2e991e86
1 changed files with 5 additions and 2 deletions
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7
drivers/media/i2c/adv7842.c
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@ -700,6 +700,9 @@ static int edid_write_hdmi_segment(struct v4l2_subdev *sd, u8 port)
/* Disable I2C access to internal EDID ram from HDMI DDC ports */
rep_write_and_or(sd, 0x77, 0xf3, 0x00);
if (!state->hdmi_edid.present)
return 0;
/* edid segment pointer '0' for HDMI ports */
rep_write_and_or(sd, 0x77, 0xef, 0x00);
@ -2638,8 +2641,8 @@ static int adv7842_command_ram_test(struct v4l2_subdev *sd)
adv7842_s_dv_timings(sd, &state->timings);
edid_write_vga_segment(sd);
edid_write_hdmi_segment(sd, 0);
edid_write_hdmi_segment(sd, 1);
edid_write_hdmi_segment(sd, ADV7842_EDID_PORT_A);
edid_write_hdmi_segment(sd, ADV7842_EDID_PORT_B);
return ret;
}