From: Antti Palosaari <crope@iki.fi>
Date: Wed, 11 Dec 2013 23:24:02 +0000 (-0300)
Subject: [media] v4l: add new tuner types for SDR
X-Git-Tag: v3.15-rc1~85^2~215
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=84099a282e1ba0facf7eee5108031a8f38f4b4fe;p=pandora-kernel.git

[media] v4l: add new tuner types for SDR

Define tuner types V4L2_TUNER_ADC and V4L2_TUNER_RF for SDR usage.

ADC is used for setting sampling rate (sampling frequency) to SDR
device.

Another tuner type, named as V4L2_TUNER_RF, is possible RF tuner.
Is is used to down-convert RF frequency to range ADC could sample.
Having RF tuner is optional, whilst in practice it is almost always
there.

Also add checks to VIDIOC_G_FREQUENCY, VIDIOC_S_FREQUENCY and
VIDIOC_ENUM_FREQ_BANDS only allow these two tuner types when device
type is SDR (VFL_TYPE_SDR). For VIDIOC_G_FREQUENCY we do not check
tuner type, instead override type with V4L2_TUNER_ADC in every
case (requested by Hans in order to keep functionality in line with
existing tuners and existing API does not specify it).

Prohibit VIDIOC_S_HW_FREQ_SEEK explicitly when device type is SDR,
as device cannot do hardware seek without a hardware demodulator.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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