2023-03-10 14:50:13

by Rob Herring (Arm)

Subject: [PATCH] drm: Use of_property_present() for testing DT property presence

It is preferred to use typed property access functions (i.e.
of_property_read_<type> functions) rather than low-level
of_get_property/of_find_property functions for reading properties. As
part of this, convert of_get_property/of_find_property calls to the
recently added of_property_present() helper when we just want to test
for presence of a property and nothing more.

Signed-off-by: Rob Herring <[email protected]>
---
drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c | 2 +-
drivers/gpu/drm/drm_mipi_dsi.c | 2 +-
drivers/gpu/drm/msm/adreno/adreno_gpu.c | 2 +-
drivers/gpu/drm/sun4i/sun4i_backend.c | 2 +-
drivers/gpu/drm/sun4i/sun8i_mixer.c | 2 +-
drivers/gpu/drm/vc4/vc4_hdmi.c | 2 +-
6 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c b/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c
index 9e5f2b4dc2e5..fab139b324af 100644
--- a/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c
+++ b/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c
@@ -313,7 +313,7 @@ imx8qxp_pixel_link_find_next_bridge(struct imx8qxp_pixel_link *pl)
}

/* specially select the next bridge with companion PXL2DPI */
- if (of_find_property(remote, "fsl,companion-pxl2dpi", NULL))
+ if (of_property_present(remote, "fsl,companion-pxl2dpi"))
bridge_sel = ep_cnt;

ep_cnt++;
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
index b41aaf2bb9f1..7900a4707d7c 100644
--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@@ -329,7 +329,7 @@ int mipi_dsi_host_register(struct mipi_dsi_host *host)

for_each_available_child_of_node(host->dev->of_node, node) {
/* skip nodes without reg property */
- if (!of_find_property(node, "reg", NULL))
+ if (!of_property_present(node, "reg"))
continue;
of_mipi_dsi_device_add(host, node);
}
diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
index ce6b76c45b6f..2359dca80492 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
@@ -964,7 +964,7 @@ static void adreno_get_pwrlevels(struct device *dev,
gpu->fast_rate = 0;

/* You down with OPP? */
- if (!of_find_property(dev->of_node, "operating-points-v2", NULL))
+ if (!of_property_present(dev->of_node, "operating-points-v2"))
ret = adreno_get_legacy_pwrlevels(dev);
else {
ret = devm_pm_opp_of_add_table(dev);
diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.c b/drivers/gpu/drm/sun4i/sun4i_backend.c
index 38070fc261f3..b11dbd50d73e 100644
--- a/drivers/gpu/drm/sun4i/sun4i_backend.c
+++ b/drivers/gpu/drm/sun4i/sun4i_backend.c
@@ -792,7 +792,7 @@ static int sun4i_backend_bind(struct device *dev, struct device *master,
dev_set_drvdata(dev, backend);
spin_lock_init(&backend->frontend_lock);

- if (of_find_property(dev->of_node, "interconnects", NULL)) {
+ if (of_property_present(dev->of_node, "interconnects")) {
/*
* This assume we have the same DMA constraints for all our the
* devices in our pipeline (all the backends, but also the
diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
index bafee05f6b24..11d5244a5aa5 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
@@ -391,7 +391,7 @@ static int sun8i_mixer_bind(struct device *dev, struct device *master,
mixer->engine.ops = &sun8i_engine_ops;
mixer->engine.node = dev->of_node;

- if (of_find_property(dev->of_node, "iommus", NULL)) {
+ if (of_property_present(dev->of_node, "iommus")) {
/*
* This assume we have the same DMA constraints for
* all our the mixers in our pipeline. This sounds
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index ea22c9bf223a..bec1e0cdddb3 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -3018,7 +3018,7 @@ static int vc4_hdmi_cec_init(struct vc4_hdmi *vc4_hdmi)
struct device *dev = &pdev->dev;
int ret;

- if (!of_find_property(dev->of_node, "interrupts", NULL)) {
+ if (!of_property_present(dev->of_node, "interrupts")) {
dev_warn(dev, "'interrupts' DT property is missing, no CEC\n");
return 0;
}
--
2.39.2

2023-03-10 15:21:13

by Laurent Pinchart

Subject: Re: [PATCH] drm: Use of_property_present() for testing DT property presence

Hi Rob,

Thank you for the patch.

On Fri, Mar 10, 2023 at 08:47:05AM -0600, Rob Herring wrote:
> It is preferred to use typed property access functions (i.e.
> of_property_read_<type> functions) rather than low-level
> of_get_property/of_find_property functions for reading properties. As
> part of this, convert of_get_property/of_find_property calls to the
> recently added of_property_present() helper when we just want to test
> for presence of a property and nothing more.
>
> Signed-off-by: Rob Herring <[email protected]>

Reviewed-by: Laurent Pinchart <[email protected]>

> ---
> drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c | 2 +-
> drivers/gpu/drm/drm_mipi_dsi.c | 2 +-
> drivers/gpu/drm/msm/adreno/adreno_gpu.c | 2 +-
> drivers/gpu/drm/sun4i/sun4i_backend.c | 2 +-
> drivers/gpu/drm/sun4i/sun8i_mixer.c | 2 +-
> drivers/gpu/drm/vc4/vc4_hdmi.c | 2 +-
> 6 files changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c b/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c
> index 9e5f2b4dc2e5..fab139b324af 100644
> --- a/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c
> +++ b/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c
> @@ -313,7 +313,7 @@ imx8qxp_pixel_link_find_next_bridge(struct imx8qxp_pixel_link *pl)
> }
>
> /* specially select the next bridge with companion PXL2DPI */
> - if (of_find_property(remote, "fsl,companion-pxl2dpi", NULL))
> + if (of_property_present(remote, "fsl,companion-pxl2dpi"))
> bridge_sel = ep_cnt;
>
> ep_cnt++;
> diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
> index b41aaf2bb9f1..7900a4707d7c 100644
> --- a/drivers/gpu/drm/drm_mipi_dsi.c
> +++ b/drivers/gpu/drm/drm_mipi_dsi.c
> @@ -329,7 +329,7 @@ int mipi_dsi_host_register(struct mipi_dsi_host *host)
>
> for_each_available_child_of_node(host->dev->of_node, node) {
> /* skip nodes without reg property */
> - if (!of_find_property(node, "reg", NULL))
> + if (!of_property_present(node, "reg"))
> continue;
> of_mipi_dsi_device_add(host, node);
> }
> diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> index ce6b76c45b6f..2359dca80492 100644
> --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> @@ -964,7 +964,7 @@ static void adreno_get_pwrlevels(struct device *dev,
> gpu->fast_rate = 0;
>
> /* You down with OPP? */
> - if (!of_find_property(dev->of_node, "operating-points-v2", NULL))
> + if (!of_property_present(dev->of_node, "operating-points-v2"))
> ret = adreno_get_legacy_pwrlevels(dev);
> else {
> ret = devm_pm_opp_of_add_table(dev);
> diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.c b/drivers/gpu/drm/sun4i/sun4i_backend.c
> index 38070fc261f3..b11dbd50d73e 100644
> --- a/drivers/gpu/drm/sun4i/sun4i_backend.c
> +++ b/drivers/gpu/drm/sun4i/sun4i_backend.c
> @@ -792,7 +792,7 @@ static int sun4i_backend_bind(struct device *dev, struct device *master,
> dev_set_drvdata(dev, backend);
> spin_lock_init(&backend->frontend_lock);
>
> - if (of_find_property(dev->of_node, "interconnects", NULL)) {
> + if (of_property_present(dev->of_node, "interconnects")) {
> /*
> * This assume we have the same DMA constraints for all our the
> * devices in our pipeline (all the backends, but also the
> diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
> index bafee05f6b24..11d5244a5aa5 100644
> --- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
> +++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
> @@ -391,7 +391,7 @@ static int sun8i_mixer_bind(struct device *dev, struct device *master,
> mixer->engine.ops = &sun8i_engine_ops;
> mixer->engine.node = dev->of_node;
>
> - if (of_find_property(dev->of_node, "iommus", NULL)) {
> + if (of_property_present(dev->of_node, "iommus")) {
> /*
> * This assume we have the same DMA constraints for
> * all our the mixers in our pipeline. This sounds
> diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
> index ea22c9bf223a..bec1e0cdddb3 100644
> --- a/drivers/gpu/drm/vc4/vc4_hdmi.c
> +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
> @@ -3018,7 +3018,7 @@ static int vc4_hdmi_cec_init(struct vc4_hdmi *vc4_hdmi)
> struct device *dev = &pdev->dev;
> int ret;
>
> - if (!of_find_property(dev->of_node, "interrupts", NULL)) {
> + if (!of_property_present(dev->of_node, "interrupts")) {
> dev_warn(dev, "'interrupts' DT property is missing, no CEC\n");
> return 0;
> }

--
Regards,

Laurent Pinchart

2023-03-10 16:17:09

by Dmitry Baryshkov

Subject: Re: [PATCH] drm: Use of_property_present() for testing DT property presence

On 10/03/2023 16:47, Rob Herring wrote:
> It is preferred to use typed property access functions (i.e.
> of_property_read_<type> functions) rather than low-level
> of_get_property/of_find_property functions for reading properties. As
> part of this, convert of_get_property/of_find_property calls to the
> recently added of_property_present() helper when we just want to test
> for presence of a property and nothing more.
>
> Signed-off-by: Rob Herring <[email protected]>
> ---
> drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c | 2 +-
> drivers/gpu/drm/drm_mipi_dsi.c | 2 +-
> drivers/gpu/drm/msm/adreno/adreno_gpu.c | 2 +-

For msm part:
Reviewed-by: Dmitry Baryshkov <[email protected]>

> drivers/gpu/drm/sun4i/sun4i_backend.c | 2 +-
> drivers/gpu/drm/sun4i/sun8i_mixer.c | 2 +-
> drivers/gpu/drm/vc4/vc4_hdmi.c | 2 +-
> 6 files changed, 6 insertions(+), 6 deletions(-)
--
With best wishes
Dmitry

2023-03-13 04:05:41

by Liu Ying

Subject: Re: [PATCH] drm: Use of_property_present() for testing DT property presence

On Fri, 2023-03-10 at 08:47 -0600, Rob Herring wrote:
> It is preferred to use typed property access functions (i.e.
> of_property_read_<type> functions) rather than low-level
> of_get_property/of_find_property functions for reading properties. As
> part of this, convert of_get_property/of_find_property calls to the
> recently added of_property_present() helper when we just want to test
> for presence of a property and nothing more.
>
> Signed-off-by: Rob Herring <[email protected]>
> ---
> drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c | 2 +-

Reviewed-by: Liu Ying <[email protected]> # i.MX bridge

> drivers/gpu/drm/drm_mipi_dsi.c | 2 +-
> drivers/gpu/drm/msm/adreno/adreno_gpu.c | 2 +-
> drivers/gpu/drm/sun4i/sun4i_backend.c | 2 +-
> drivers/gpu/drm/sun4i/sun8i_mixer.c | 2 +-
> drivers/gpu/drm/vc4/vc4_hdmi.c | 2 +-
> 6 files changed, 6 insertions(+), 6 deletions(-)

2023-03-14 20:05:02

by Jernej Škrabec

Subject: Re: [PATCH] drm: Use of_property_present() for testing DT property presence

Dne petek, 10. marec 2023 ob 15:47:05 CET je Rob Herring napisal(a):
> It is preferred to use typed property access functions (i.e.
> of_property_read_<type> functions) rather than low-level
> of_get_property/of_find_property functions for reading properties. As
> part of this, convert of_get_property/of_find_property calls to the
> recently added of_property_present() helper when we just want to test
> for presence of a property and nothing more.
>
> Signed-off-by: Rob Herring <[email protected]>
> ---
> drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c | 2 +-
> drivers/gpu/drm/drm_mipi_dsi.c | 2 +-
> drivers/gpu/drm/msm/adreno/adreno_gpu.c | 2 +-
> drivers/gpu/drm/sun4i/sun4i_backend.c | 2 +-
> drivers/gpu/drm/sun4i/sun8i_mixer.c | 2 +-

For sun4i:
Reviewed-by: Jernej Skrabec <[email protected]>

Best regards,
Jernej

> drivers/gpu/drm/vc4/vc4_hdmi.c | 2 +-
> 6 files changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c
> b/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c index
> 9e5f2b4dc2e5..fab139b324af 100644
> --- a/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c
> +++ b/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c
> @@ -313,7 +313,7 @@ imx8qxp_pixel_link_find_next_bridge(struct
> imx8qxp_pixel_link *pl) }
>
> /* specially select the next bridge with companion
PXL2DPI */
> - if (of_find_property(remote, "fsl,companion-pxl2dpi",
NULL))
> + if (of_property_present(remote, "fsl,companion-
pxl2dpi"))
> bridge_sel = ep_cnt;
>
> ep_cnt++;
> diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
> index b41aaf2bb9f1..7900a4707d7c 100644
> --- a/drivers/gpu/drm/drm_mipi_dsi.c
> +++ b/drivers/gpu/drm/drm_mipi_dsi.c
> @@ -329,7 +329,7 @@ int mipi_dsi_host_register(struct mipi_dsi_host *host)
>
> for_each_available_child_of_node(host->dev->of_node, node) {
> /* skip nodes without reg property */
> - if (!of_find_property(node, "reg", NULL))
> + if (!of_property_present(node, "reg"))
> continue;
> of_mipi_dsi_device_add(host, node);
> }
> diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> b/drivers/gpu/drm/msm/adreno/adreno_gpu.c index ce6b76c45b6f..2359dca80492
> 100644
> --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> @@ -964,7 +964,7 @@ static void adreno_get_pwrlevels(struct device *dev,
> gpu->fast_rate = 0;
>
> /* You down with OPP? */
> - if (!of_find_property(dev->of_node, "operating-points-v2", NULL))
> + if (!of_property_present(dev->of_node, "operating-points-v2"))
> ret = adreno_get_legacy_pwrlevels(dev);
> else {
> ret = devm_pm_opp_of_add_table(dev);
> diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.c
> b/drivers/gpu/drm/sun4i/sun4i_backend.c index 38070fc261f3..b11dbd50d73e
> 100644
> --- a/drivers/gpu/drm/sun4i/sun4i_backend.c
> +++ b/drivers/gpu/drm/sun4i/sun4i_backend.c
> @@ -792,7 +792,7 @@ static int sun4i_backend_bind(struct device *dev, struct
> device *master, dev_set_drvdata(dev, backend);
> spin_lock_init(&backend->frontend_lock);
>
> - if (of_find_property(dev->of_node, "interconnects", NULL)) {
> + if (of_property_present(dev->of_node, "interconnects")) {
> /*
> * This assume we have the same DMA constraints for all
our the
> * devices in our pipeline (all the backends, but also
the
> diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c
> b/drivers/gpu/drm/sun4i/sun8i_mixer.c index bafee05f6b24..11d5244a5aa5
> 100644
> --- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
> +++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
> @@ -391,7 +391,7 @@ static int sun8i_mixer_bind(struct device *dev, struct
> device *master, mixer->engine.ops = &sun8i_engine_ops;
> mixer->engine.node = dev->of_node;
>
> - if (of_find_property(dev->of_node, "iommus", NULL)) {
> + if (of_property_present(dev->of_node, "iommus")) {
> /*
> * This assume we have the same DMA constraints for
> * all our the mixers in our pipeline. This sounds
> diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
> index ea22c9bf223a..bec1e0cdddb3 100644
> --- a/drivers/gpu/drm/vc4/vc4_hdmi.c
> +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
> @@ -3018,7 +3018,7 @@ static int vc4_hdmi_cec_init(struct vc4_hdmi
> *vc4_hdmi) struct device *dev = &pdev->dev;
> int ret;
>
> - if (!of_find_property(dev->of_node, "interrupts", NULL)) {
> + if (!of_property_present(dev->of_node, "interrupts")) {
> dev_warn(dev, "'interrupts' DT property is missing, no
CEC\n");
> return 0;
> }