From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: Andrzej Hajda <a.hajda@samsung.com>
Cc: Rob Clark <robdclark@gmail.com>,
dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org,
Sean Paul <seanpaul@chromium.org>,
Rob Clark <robdclark@chromium.org>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/3] drm/bridge: ti-sn65dsi86: add debugfs
Date: Thu, 4 Jul 2019 15:35:11 +0300 [thread overview]
Message-ID: <20190704123511.GG6569@pendragon.ideasonboard.com> (raw)
In-Reply-To: <1b56a11c-194d-0eca-4dd1-48e91820eafb@samsung.com>
Hello,
On Thu, Jul 04, 2019 at 02:31:20PM +0200, Andrzej Hajda wrote:
> On 02.07.2019 17:44, Rob Clark wrote:
> > From: Rob Clark <robdclark@chromium.org>
> >
> > Add a debugfs file to show status registers.
> >
> > Signed-off-by: Rob Clark <robdclark@chromium.org>
> > ---
> > drivers/gpu/drm/bridge/ti-sn65dsi86.c | 42 +++++++++++++++++++++++++++
> > 1 file changed, 42 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> > index f1a2493b86d9..a6f27648c015 100644
> > --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> > +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> > @@ -5,6 +5,7 @@
> > */
> >
> > #include <linux/clk.h>
> > +#include <linux/debugfs.h>
> > #include <linux/gpio/consumer.h>
> > #include <linux/i2c.h>
> > #include <linux/iopoll.h>
> > @@ -109,6 +110,7 @@ struct ti_sn_bridge {
> > struct drm_dp_aux aux;
> > struct drm_bridge bridge;
> > struct drm_connector connector;
> > + struct dentry *debugfs;
> > struct device_node *host_node;
> > struct mipi_dsi_device *dsi;
> > struct clk *refclk;
> > @@ -178,6 +180,42 @@ static const struct dev_pm_ops ti_sn_bridge_pm_ops = {
> > SET_RUNTIME_PM_OPS(ti_sn_bridge_suspend, ti_sn_bridge_resume, NULL)
> > };
> >
> > +static int status_show(struct seq_file *s, void *data)
> > +{
> > + struct ti_sn_bridge *pdata = s->private;
> > + unsigned int reg, val;
> > +
> > + seq_puts(s, "STATUS REGISTERS:\n");
NO NEED TO SHOUT :-)
> > +
> > + pm_runtime_get_sync(pdata->dev);
> > +
> > + /* IRQ Status Registers, see Table 31 in datasheet */
> > + for (reg = 0xf0; reg <= 0xf8; reg++) {
> > + regmap_read(pdata->regmap, reg, &val);
> > + seq_printf(s, "[0x%02x] = 0x%08x\n", reg, val);
> > + }
> > +
> > + pm_runtime_put(pdata->dev);
> > +
> > + return 0;
> > +}
> > +
> > +DEFINE_SHOW_ATTRIBUTE(status);
> > +
> > +static void ti_sn_debugfs_init(struct ti_sn_bridge *pdata)
> > +{
> > + pdata->debugfs = debugfs_create_dir("ti_sn65dsi86", NULL);
>
> If some day we will have board with two such bridges there will be a
> problem.
Could we use the platform device name for this ?
> Anyway:
>
> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
>
> > +
> > + debugfs_create_file("status", 0600, pdata->debugfs, pdata,
> > + &status_fops);
> > +}
> > +
> > +static void ti_sn_debugfs_remove(struct ti_sn_bridge *pdata)
> > +{
> > + debugfs_remove_recursive(pdata->debugfs);
> > + pdata->debugfs = NULL;
> > +}
> > +
You need to conditionally-compile this based on CONFIG_DEBUG_FS.
> > /* Connector funcs */
> > static struct ti_sn_bridge *
> > connector_to_ti_sn_bridge(struct drm_connector *connector)
> > @@ -869,6 +907,8 @@ static int ti_sn_bridge_probe(struct i2c_client *client,
> >
> > drm_bridge_add(&pdata->bridge);
> >
> > + ti_sn_debugfs_init(pdata);
> > +
> > return 0;
> > }
> >
> > @@ -879,6 +919,8 @@ static int ti_sn_bridge_remove(struct i2c_client *client)
> > if (!pdata)
> > return -EINVAL;
> >
> > + ti_sn_debugfs_remove(pdata);
> > +
> > of_node_put(pdata->host_node);
> >
> > pm_runtime_disable(pdata->dev);
--
Regards,
Laurent Pinchart
next prev parent reply other threads:[~2019-07-04 12:35 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20190702154436epcas2p3fdaaa095c15a116a0be7e5313469151f@epcas2p3.samsung.com>
2019-07-02 15:44 ` [PATCH 0/3] drm/bridge: ti-sn65dsi86: debugfs and mode_flags fix Rob Clark
2019-07-02 15:44 ` [PATCH 1/3] drm/bridge: ti-sn65dsi86: add link to datasheet Rob Clark
2019-07-02 17:03 ` Jeffrey Hugo
2019-07-04 12:26 ` Andrzej Hajda
2019-07-04 12:32 ` Laurent Pinchart
2019-07-02 15:44 ` [PATCH 2/3] drm/bridge: ti-sn65dsi86: add debugfs Rob Clark
2019-07-02 17:05 ` Jeffrey Hugo
2019-07-04 12:31 ` Andrzej Hajda
2019-07-04 12:35 ` Laurent Pinchart [this message]
2019-07-04 13:56 ` Rob Clark
2019-07-04 21:10 ` Laurent Pinchart
2019-07-02 15:44 ` [PATCH 3/3] drm/bridge: ti-sn65dsi86: correct dsi mode_flags Rob Clark
2019-07-02 17:09 ` Jeffrey Hugo
2019-07-02 17:12 ` Rob Clark
2019-07-02 17:23 ` Jeffrey Hugo
2019-07-04 12:33 ` Andrzej Hajda
2019-07-04 13:18 ` [PATCH 0/3] drm/bridge: ti-sn65dsi86: debugfs and mode_flags fix Andrzej Hajda
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