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Mon, 7 Jan 2019 05:35:58 -0500 Received: from [192.168.0.21] (cpc89242-aztw30-2-0-cust488.18-1.cable.virginm.net [86.31.129.233]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 21B43530; Mon, 7 Jan 2019 11:35:55 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1546857355; bh=isYVv/GVQmGjlDjhXN3A2+lz6tm6vVyF6hiLYncZ1ig=; h=Reply-To:Subject:To:Cc:References:From:Date:In-Reply-To:From; b=IdVG3KSbAg4ChyAqM5PGP3y5BmbgH2smvhPpKfJzBQk3OWm3vfVEl1voI2eqg9xjC osZArYotyxCOYzPJRPDupxxYzhvdzucuRL7LHlu+t+Ni6NVlkW4pxbn2PgAsHn6IAe DepAEhAhgxW+BO2UagjdkN0qFHHfa9JTkzvEAPNk= Reply-To: kieran.bingham@ideasonboard.com Subject: Re: [PATCH v2 3/6] media: adv748x: csi2: Link AFE with TXA and TXB To: Jacopo Mondi , laurent.pinchart@ideasonboard.com, niklas.soderlund+renesas@ragnatech.se Cc: linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org References: <20190106155413.30666-1-jacopo+renesas@jmondi.org> <20190106155413.30666-4-jacopo+renesas@jmondi.org> From: Kieran Bingham Openpgp: preference=signencrypt Autocrypt: addr=kieran.bingham@ideasonboard.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1 MIME-Version: 1.0 In-Reply-To: <20190106155413.30666-4-jacopo+renesas@jmondi.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-GB Content-Transfer-Encoding: 7bit Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Hi Jacopo, On 06/01/2019 15:54, Jacopo Mondi wrote: > The ADV748x chip supports routing AFE output to either TXA or TXB. > In order to support run-time configuration of video stream path, create an > additional (not enabled) "AFE:8->TXA:0" link, and remove the IMMUTABLE flag > from existing ones. Great - this looks good to me. Small nit below - but it's not a big deal. Reviewed-by: Kieran Bingham > Signed-off-by: Jacopo Mondi > --- > drivers/media/i2c/adv748x/adv748x-csi2.c | 44 +++++++++++++----------- > 1 file changed, 23 insertions(+), 21 deletions(-) > > diff --git a/drivers/media/i2c/adv748x/adv748x-csi2.c b/drivers/media/i2c/adv748x/adv748x-csi2.c > index b6b5d8c7ea7c..9d391d6f752e 100644 > --- a/drivers/media/i2c/adv748x/adv748x-csi2.c > +++ b/drivers/media/i2c/adv748x/adv748x-csi2.c > @@ -27,6 +27,7 @@ static int adv748x_csi2_set_virtual_channel(struct adv748x_csi2 *tx, > * @v4l2_dev: Video registration device > * @src: Source subdevice to establish link > * @src_pad: Pad number of source to link to this @tx > + * @enable: Link enabled flag > * > * Ensure that the subdevice is registered against the v4l2_device, and link the > * source pad to the sink pad of the CSI2 bus entity. > @@ -34,17 +35,11 @@ static int adv748x_csi2_set_virtual_channel(struct adv748x_csi2 *tx, > static int adv748x_csi2_register_link(struct adv748x_csi2 *tx, > struct v4l2_device *v4l2_dev, > struct v4l2_subdev *src, > - unsigned int src_pad) > + unsigned int src_pad, > + bool enable) > { > - int enabled = MEDIA_LNK_FL_ENABLED; > int ret; > > - /* > - * Dynamic linking of the AFE is not supported. > - * Register the links as immutable. > - */ > - enabled |= MEDIA_LNK_FL_IMMUTABLE; > - > if (!src->v4l2_dev) { > ret = v4l2_device_register_subdev(v4l2_dev, src); > if (ret) > @@ -53,7 +48,7 @@ static int adv748x_csi2_register_link(struct adv748x_csi2 *tx, > > return media_create_pad_link(&src->entity, src_pad, > &tx->sd.entity, ADV748X_CSI2_SINK, > - enabled); > + enable ? MEDIA_LNK_FL_ENABLED : 0); > } > > /* ----------------------------------------------------------------------------- > @@ -68,25 +63,32 @@ static int adv748x_csi2_registered(struct v4l2_subdev *sd) > { > struct adv748x_csi2 *tx = adv748x_sd_to_csi2(sd); > struct adv748x_state *state = tx->state; > + int ret; > > adv_dbg(state, "Registered %s (%s)", is_txa(tx) ? "TXA":"TXB", > sd->name); > > /* > - * The adv748x hardware allows the AFE to route through the TXA, however > - * this is not currently supported in this driver. > + * Link TXA to AFE and HDMI, and TXB to AFE only as TXB cannot output > + * HDMI. > * > - * Link HDMI->TXA, and AFE->TXB directly. > + * The HDMI->TXA link is enabled by default, as the AFE->TXB is. I might have worded this "as is the AFE->TXB." but it's understandable. I can update this when applying if you wish. > */ > - if (is_txa(tx) && is_hdmi_enabled(state)) > - return adv748x_csi2_register_link(tx, sd->v4l2_dev, > - &state->hdmi.sd, > - ADV748X_HDMI_SOURCE); > - if (is_txb(tx) && is_afe_enabled(state)) > - return adv748x_csi2_register_link(tx, sd->v4l2_dev, > - &state->afe.sd, > - ADV748X_AFE_SOURCE); > - return 0; > + if (is_afe_enabled(state)) { > + ret = adv748x_csi2_register_link(tx, sd->v4l2_dev, > + &state->afe.sd, > + ADV748X_AFE_SOURCE, > + is_txb(tx)); > + if (ret) > + return ret; > + } > + > + /* Register link to HDMI for TXA only. */ > + if (is_txb(tx) || !is_hdmi_enabled(state)) > + return 0; > + > + return adv748x_csi2_register_link(tx, sd->v4l2_dev, &state->hdmi.sd, > + ADV748X_HDMI_SOURCE, true); > } > > static const struct v4l2_subdev_internal_ops adv748x_csi2_internal_ops = { > -- Regards -- Kieran