Message ID | 87sf26nvy2.wl-kuninori.morimoto.gx@renesas.com (mailing list archive) |
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State | Superseded |
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Tue, 6 Feb 2024 02:55:02 +0000 Message-ID: <87sf26nvy2.wl-kuninori.morimoto.gx@renesas.com> To: "Lad, Prabhakar" <prabhakar.csengg@gmail.com>, =?iso-8859-1?q?=22Uwe_Kl?= =?iso-8859-1?q?eine-K=F6nig=22?= <u.kleine-koenig@pengutronix.de>, Alexandre Belloni <alexandre.belloni@bootlin.com>, Alexandre Torgue <alexandre.torgue@foss.st.com>, Alexey Brodkin <abrodkin@synopsys.com>, Alim Akhtar <alim.akhtar@samsung.com>, Andrzej Hajda <andrzej.hajda@intel.com>, Biju Das <biju.das.jz@bp.renesas.com>, Broadcom internal kernel review list <bcm-kernel-feedback-list@broadcom.com>, Claudiu Beznea <claudiu.beznea@tuxon.dev>, Daniel Vetter <daniel@ffwll.ch>, Dave Stevenson <dave.stevenson@raspberrypi.com>, David Airlie <airlied@gmail.com>, Eugen Hristev <eugen.hristev@collabora.com>, Florian Fainelli <florian.fainelli@broadcom.com>, Hans Verkuil <hverkuil-cisco@xs4all.nl>, Helge Deller <deller@gmx.de>, Hugues Fruchet <hugues.fruchet@foss.st.com>, Jacopo Mondi <jacopo@jmondi.org>, Jessica Zhang <quic_jesszhan@quicinc.com>, Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>, Laurent Pinchart <laurent.pinchart@ideasonboard.com>, Maarten Lankhorst <maarten.lankhorst@linux.intel.com>, Mauro Carvalho Chehab <mchehab@kernel.org>, Maxime Coquelin <mcoquelin.stm32@gmail.com>, Maxime Ripard <mripard@kernel.org>, Neil Armstrong <neil.armstrong@linaro.org>, Nicolas Ferre <nicolas.ferre@microchip.com>, Russell King <linux@armlinux.org.uk>, Sakari Ailus <sakari.ailus@linux.intel.com>, Sam Ravnborg <sam@ravnborg.org>, Sylwester Nawrocki <s.nawrocki@samsung.com>, Thomas Zimmermann <tzimmermann@suse.de>, Tim Harvey <tharvey@gateworks.com>, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-fbdev@vger.kernel.org, linux-media@vger.kernel.org, linux-omap@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Subject: [PATCH 1/4] gpu: drm: replace of_graph_get_next_endpoint() In-Reply-To: <87ttmmnvzh.wl-kuninori.morimoto.gx@renesas.com> References: <87ttmmnvzh.wl-kuninori.morimoto.gx@renesas.com> Content-Type: text/plain; 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Series |
of: replace of_graph_get_next_endpoint()
|
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Commit Message
Kuninori Morimoto
Feb. 6, 2024, 2:55 a.m. UTC
From DT point of view, in general, drivers should be asking for a
specific port number because their function is fixed in the binding.
of_graph_get_next_endpoint() doesn't match to this concept.
Simply replace
- of_graph_get_next_endpoint(xxx, NULL);
+ of_graph_get_endpoint_by_regs(xxx, 0, -1);
Link: https://lore.kernel.org/r/20240202174941.GA310089-robh@kernel.org
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
drivers/gpu/drm/drm_of.c | 2 +-
drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c | 2 +-
drivers/gpu/drm/tiny/arcpgu.c | 2 +-
3 files changed, 3 insertions(+), 3 deletions(-)
Comments
Hello Morimoto-san, Thank you for the patch. On Tue, Feb 06, 2024 at 02:55:01AM +0000, Kuninori Morimoto wrote: > From DT point of view, in general, drivers should be asking for a > specific port number because their function is fixed in the binding. > > of_graph_get_next_endpoint() doesn't match to this concept. > > Simply replace > > - of_graph_get_next_endpoint(xxx, NULL); > + of_graph_get_endpoint_by_regs(xxx, 0, -1); > > Link: https://lore.kernel.org/r/20240202174941.GA310089-robh@kernel.org > Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> > --- > drivers/gpu/drm/drm_of.c | 2 +- > drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c | 2 +- > drivers/gpu/drm/tiny/arcpgu.c | 2 +- > 3 files changed, 3 insertions(+), 3 deletions(-) > > diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c > index 177b600895d3..c2eae9296012 100644 > --- a/drivers/gpu/drm/drm_of.c > +++ b/drivers/gpu/drm/drm_of.c > @@ -516,7 +516,7 @@ struct mipi_dsi_host *drm_of_get_dsi_bus(struct device *dev) > /* > * Get first endpoint child from device. > */ > - endpoint = of_graph_get_next_endpoint(dev->of_node, NULL); > + endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1); This assumes that the DSI device's port@0 will also be the input. That's fine for current users of this function, but we should at least document it. diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c index 177b600895d3..012c4d04cf51 100644 --- a/drivers/gpu/drm/drm_of.c +++ b/drivers/gpu/drm/drm_of.c @@ -504,6 +504,8 @@ EXPORT_SYMBOL_GPL(drm_of_get_data_lanes_count_ep); * Gets parent DSI bus for a DSI device controlled through a bus other * than MIPI-DCS (SPI, I2C, etc.) using the Device Tree. * + * This function assumes that the device's port@0 is the DSI input. + * * Returns pointer to mipi_dsi_host if successful, -EINVAL if the * request is unsupported, -EPROBE_DEFER if the DSI host is found but * not available, or -ENODEV otherwise. With this, Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> > if (!endpoint) > return ERR_PTR(-ENODEV); > > diff --git a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c > index 4618c892cdd6..e10e469aa7a6 100644 > --- a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c > +++ b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c > @@ -400,7 +400,7 @@ static int rpi_touchscreen_probe(struct i2c_client *i2c) > rpi_touchscreen_i2c_write(ts, REG_POWERON, 0); > > /* Look up the DSI host. It needs to probe before we do. */ > - endpoint = of_graph_get_next_endpoint(dev->of_node, NULL); > + endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1); > if (!endpoint) > return -ENODEV; > > diff --git a/drivers/gpu/drm/tiny/arcpgu.c b/drivers/gpu/drm/tiny/arcpgu.c > index e5b10e41554a..04d0053b9315 100644 > --- a/drivers/gpu/drm/tiny/arcpgu.c > +++ b/drivers/gpu/drm/tiny/arcpgu.c > @@ -288,7 +288,7 @@ static int arcpgu_load(struct arcpgu_drm_private *arcpgu) > * There is only one output port inside each device. It is linked with > * encoder endpoint. > */ > - endpoint_node = of_graph_get_next_endpoint(pdev->dev.of_node, NULL); > + endpoint_node = of_graph_get_endpoint_by_regs(pdev->dev.of_node, 0, -1); > if (endpoint_node) { > encoder_node = of_graph_get_remote_port_parent(endpoint_node); > of_node_put(endpoint_node);
diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c index 177b600895d3..c2eae9296012 100644 --- a/drivers/gpu/drm/drm_of.c +++ b/drivers/gpu/drm/drm_of.c @@ -516,7 +516,7 @@ struct mipi_dsi_host *drm_of_get_dsi_bus(struct device *dev) /* * Get first endpoint child from device. */ - endpoint = of_graph_get_next_endpoint(dev->of_node, NULL); + endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1); if (!endpoint) return ERR_PTR(-ENODEV); diff --git a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c index 4618c892cdd6..e10e469aa7a6 100644 --- a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c +++ b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c @@ -400,7 +400,7 @@ static int rpi_touchscreen_probe(struct i2c_client *i2c) rpi_touchscreen_i2c_write(ts, REG_POWERON, 0); /* Look up the DSI host. It needs to probe before we do. */ - endpoint = of_graph_get_next_endpoint(dev->of_node, NULL); + endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1); if (!endpoint) return -ENODEV; diff --git a/drivers/gpu/drm/tiny/arcpgu.c b/drivers/gpu/drm/tiny/arcpgu.c index e5b10e41554a..04d0053b9315 100644 --- a/drivers/gpu/drm/tiny/arcpgu.c +++ b/drivers/gpu/drm/tiny/arcpgu.c @@ -288,7 +288,7 @@ static int arcpgu_load(struct arcpgu_drm_private *arcpgu) * There is only one output port inside each device. It is linked with * encoder endpoint. */ - endpoint_node = of_graph_get_next_endpoint(pdev->dev.of_node, NULL); + endpoint_node = of_graph_get_endpoint_by_regs(pdev->dev.of_node, 0, -1); if (endpoint_node) { encoder_node = of_graph_get_remote_port_parent(endpoint_node); of_node_put(endpoint_node);