From: Hans Verkuil <hverkuil-cisco@xs4all.nl>
To: Dariusz Marcinkiewicz <darekm@google.com>,
dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org
Cc: Andrzej Hajda <a.hajda@samsung.com>,
Neil Armstrong <narmstrong@baylibre.com>,
Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
Jonas Karlman <jonas@kwiboo.se>,
Jernej Skrabec <jernej.skrabec@siol.net>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
Sam Ravnborg <sam@ravnborg.org>,
Douglas Anderson <dianders@chromium.org>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v6 7/8] drm: dw-hdmi: use cec_notifier_conn_(un)register
Date: Tue, 13 Aug 2019 13:37:53 +0200 [thread overview]
Message-ID: <41c95313-fe39-b201-5238-24df7e72879a@xs4all.nl> (raw)
In-Reply-To: <20190813110300.83025-8-darekm@google.com>
On 8/13/19 1:02 PM, Dariusz Marcinkiewicz wrote:
> Use the new cec_notifier_conn_(un)register() functions to
> (un)register the notifier for the HDMI connector, and fill in
> the cec_connector_info.
>
> Changes since v4:
> - typo fix
> Changes since v2:
> - removed unnecessary NULL check before a call to
> cec_notifier_conn_unregister,
> - use cec_notifier_phys_addr_invalidate to invalidate physical
> address.
> Changes since v1:
> Add memory barrier to make sure that the notifier
> becomes visible to the irq thread once it is fully
> constructed.
>
> Signed-off-by: Dariusz Marcinkiewicz <darekm@google.com>
> Tested-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
> ---
> drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 36 ++++++++++++++---------
> 1 file changed, 22 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> index 83b94b66e464e..c00184700bb9d 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -2194,6 +2194,8 @@ static int dw_hdmi_bridge_attach(struct drm_bridge *bridge)
> struct dw_hdmi *hdmi = bridge->driver_private;
> struct drm_encoder *encoder = bridge->encoder;
> struct drm_connector *connector = &hdmi->connector;
> + struct cec_connector_info conn_info;
> + struct cec_notifier *notifier;
>
> connector->interlace_allowed = 1;
> connector->polled = DRM_CONNECTOR_POLL_HPD;
> @@ -2207,6 +2209,18 @@ static int dw_hdmi_bridge_attach(struct drm_bridge *bridge)
>
> drm_connector_attach_encoder(connector, encoder);
>
> + cec_fill_conn_info_from_drm(&conn_info, connector);
> +
> + notifier = cec_notifier_conn_register(hdmi->dev, NULL, &conn_info);
> + if (!notifier)
> + return -ENOMEM;
> + /*
> + * Make sure that dw_hdmi_irq thread does see the notifier
> + * when it fully constructed.
> + */
> + smp_wmb();
> + hdmi->cec_notifier = notifier;
> +
> return 0;
> }
>
> @@ -2373,9 +2387,13 @@ static irqreturn_t dw_hdmi_irq(int irq, void *dev_id)
> phy_stat & HDMI_PHY_HPD,
> phy_stat & HDMI_PHY_RX_SENSE);
>
> - if ((phy_stat & (HDMI_PHY_RX_SENSE | HDMI_PHY_HPD)) == 0)
> - cec_notifier_set_phys_addr(hdmi->cec_notifier,
> - CEC_PHYS_ADDR_INVALID);
> + if ((phy_stat & (HDMI_PHY_RX_SENSE | HDMI_PHY_HPD)) == 0) {
> + struct cec_notifier *notifier;
> +
> + notifier = READ_ONCE(hdmi->cec_notifier);
> + if (notifier)
> + cec_notifier_phys_addr_invalidate(notifier);
> + }
> }
>
> if (intr_stat & HDMI_IH_PHY_STAT0_HPD) {
> @@ -2693,12 +2711,6 @@ __dw_hdmi_probe(struct platform_device *pdev,
> if (ret)
> goto err_iahb;
>
> - hdmi->cec_notifier = cec_notifier_get(dev);
> - if (!hdmi->cec_notifier) {
> - ret = -ENOMEM;
> - goto err_iahb;
> - }
> -
> /*
> * To prevent overflows in HDMI_IH_FC_STAT2, set the clk regenerator
> * N and cts values before enabling phy
> @@ -2796,9 +2808,6 @@ __dw_hdmi_probe(struct platform_device *pdev,
> hdmi->ddc = NULL;
> }
>
> - if (hdmi->cec_notifier)
> - cec_notifier_put(hdmi->cec_notifier);
> -
> clk_disable_unprepare(hdmi->iahb_clk);
> if (hdmi->cec_clk)
> clk_disable_unprepare(hdmi->cec_clk);
> @@ -2820,8 +2829,7 @@ static void __dw_hdmi_remove(struct dw_hdmi *hdmi)
> /* Disable all interrupts */
> hdmi_writeb(hdmi, ~0, HDMI_IH_MUTE_PHY_STAT0);
>
> - if (hdmi->cec_notifier)
> - cec_notifier_put(hdmi->cec_notifier);
> + cec_notifier_conn_unregister(hdmi->cec_notifier);
Russell's review caused me to take another look at this series, and it made
wonder if cec_notifier_conn_unregister() shouldn't be called from bridge_detach?
Regards,
Hans
>
> clk_disable_unprepare(hdmi->iahb_clk);
> clk_disable_unprepare(hdmi->isfr_clk);
>
next prev parent reply other threads:[~2019-08-13 11:38 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-13 11:02 [PATCH v6 0/8] drm: cec: convert DRM drivers to the new notifier API Dariusz Marcinkiewicz
2019-08-13 11:02 ` [PATCH v6 1/8] drm/i915/intel_hdmi: use cec_notifier_conn_(un)register Dariusz Marcinkiewicz
2019-08-13 11:02 ` [PATCH v6 2/8] dw-hdmi-cec: use cec_notifier_cec_adap_(un)register Dariusz Marcinkiewicz
2019-08-13 11:02 ` [PATCH v6 3/8] tda9950: " Dariusz Marcinkiewicz
2019-08-13 11:32 ` Russell King - ARM Linux admin
2019-08-13 11:44 ` Hans Verkuil
2019-08-13 11:02 ` [PATCH v6 4/8] drm: tda998x: use cec_notifier_conn_(un)register Dariusz Marcinkiewicz
2019-08-13 11:20 ` Russell King - ARM Linux admin
2019-08-14 10:52 ` Dariusz Marcinkiewicz
2019-08-13 11:02 ` [PATCH v6 5/8] drm: sti: " Dariusz Marcinkiewicz
2019-08-13 11:02 ` [PATCH v6 6/8] drm: tegra: " Dariusz Marcinkiewicz
2019-08-13 11:02 ` [PATCH v6 7/8] drm: dw-hdmi: " Dariusz Marcinkiewicz
2019-08-13 11:37 ` Hans Verkuil [this message]
2019-08-14 10:49 ` Dariusz Marcinkiewicz
2019-08-13 11:02 ` [PATCH v6 8/8] drm: exynos: exynos_hdmi: " Dariusz Marcinkiewicz
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=41c95313-fe39-b201-5238-24df7e72879a@xs4all.nl \
--to=hverkuil-cisco@xs4all.nl \
--cc=Laurent.pinchart@ideasonboard.com \
--cc=a.hajda@samsung.com \
--cc=airlied@linux.ie \
--cc=daniel@ffwll.ch \
--cc=darekm@google.com \
--cc=dianders@chromium.org \
--cc=dri-devel@lists.freedesktop.org \
--cc=jernej.skrabec@siol.net \
--cc=jonas@kwiboo.se \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=narmstrong@baylibre.com \
--cc=sam@ravnborg.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).