From 36b75621a1709bd8f33264ad85f3c5f06e1bbb49 Mon Sep 17 00:00:00 2001 From: Martin Bugge Date: Thu, 5 Dec 2013 12:14:02 -0300 Subject: [PATCH] upstream: [media] adv7842: support g_edid ioctl Signed-off-by: Martin Bugge Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/i2c/adv7842.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) diff --git a/drivers/media/i2c/adv7842.c b/drivers/media/i2c/adv7842.c index 927c678..e17f3bd 100644 --- a/drivers/media/i2c/adv7842.c +++ b/drivers/media/i2c/adv7842.c @@ -1910,6 +1910,46 @@ static int adv7842_isr(struct v4l2_subdev *sd, u32 status, bool *handled) return 0; } +static int adv7842_get_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid) +{ + struct adv7842_state *state = to_state(sd); + u8 *data = NULL; + + if (edid->pad > ADV7842_EDID_PORT_VGA) + return -EINVAL; + if (edid->blocks == 0) + return -EINVAL; + if (edid->blocks > 2) + return -EINVAL; + if (edid->start_block > 1) + return -EINVAL; + if (edid->start_block == 1) + edid->blocks = 1; + if (!edid->edid) + return -EINVAL; + + switch (edid->pad) { + case ADV7842_EDID_PORT_A: + case ADV7842_EDID_PORT_B: + if (state->hdmi_edid.present & (0x04 << edid->pad)) + data = state->hdmi_edid.edid; + break; + case ADV7842_EDID_PORT_VGA: + if (state->vga_edid.present) + data = state->vga_edid.edid; + break; + default: + return -EINVAL; + } + if (!data) + return -ENODATA; + + memcpy(edid->edid, + data + edid->start_block * 128, + edid->blocks * 128); + return 0; +} + static int adv7842_set_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *e) { struct adv7842_state *state = to_state(sd); @@ -2722,6 +2762,7 @@ static const struct v4l2_subdev_video_ops adv7842_video_ops = { }; static const struct v4l2_subdev_pad_ops adv7842_pad_ops = { + .get_edid = adv7842_get_edid, .set_edid = adv7842_set_edid, }; -- 2.7.4