Date:   Mon, 07 Nov 2022 20:27:02 +0000
From:   sarha@...si.fi
To:     "Sean Anderson" <sean.anderson@...o.com>,
        "David Airlie" <airlied@...il.com>,
        "Daniel Vetter" <daniel@...ll.ch>,
        "Maarten Lankhorst" <maarten.lankhorst@...ux.intel.com>,
        "Maxime Ripard" <mripard@...nel.org>,
        "Thomas Zimmermann" <tzimmermann@...e.de>,
        dri-devel@...ts.freedesktop.org
Cc:     linux-kernel@...r.kernel.org,
        "Abhinav Kumar" <quic_abhinavk@...cinc.com>,
        "Alain Volmat" <alain.volmat@...s.st.com>,
        "Brian Starkey" <brian.starkey@....com>,
        "Chen Feng" <puck.chen@...ilicon.com>,
        "Chen-Yu Tsai" <wens@...e.org>,
        "Christian Gmeiner" <christian.gmeiner@...il.com>,
        "Chun-Kuang Hu" <chunkuang.hu@...nel.org>,
        "Dmitry Baryshkov" <dmitry.baryshkov@...aro.org>,
        "Jernej Skrabec" <jernej.skrabec@...il.com>,
        "John Stultz" <jstultz@...gle.com>,
        "Jyri Sarha" <jyri.sarha@....fi>,
        "Liviu Dudau" <liviu.dudau@....com>,
        "Lucas Stach" <l.stach@...gutronix.de>,
        "Mali DP Maintainers" <malidp@...s.arm.com>,
        "Matthias Brugger" <matthias.bgg@...il.com>,
        "Mihail Atanassov" <mihail.atanassov@....com>,
        "Paul Cercueil" <paul@...pouillou.net>,
        "Philipp Zabel" <p.zabel@...gutronix.de>,
        "Rob Clark" <robdclark@...il.com>,
        "Russell King" <linux@...linux.org.uk>,
        "Samuel Holland" <samuel@...lland.org>,
        "Sean Paul" <sean@...rly.run>, "Tian Tao" <tiantao6@...ilicon.com>,
        "Tomi Valkeinen" <tomba@...nel.org>,
        "Xinliang Liu" <xinliang.liu@...aro.org>,
        "Xinwei Kong" <kong.kongxinwei@...ilicon.com>,
        etnaviv@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        linux-mips@...r.kernel.org, linux-sunxi@...ts.linux.dev
Subject: Re: [PATCH 2/2] drm: Convert users of drm_of_component_match_add
 to component_match_add_of

November 3, 2022 at 8:22 PM, "Sean Anderson" <sean.anderson@...o.com mailto:sean.anderson@...o.com?to=%22Sean%20Anderson%22%20%3Csean.anderson%40seco.com%3E > wrote:

> 
> Every user of this function either uses component_compare_of or
> something equivalent. Most of them immediately put the device node as
> well. Convert these users to component_match_add_of and remove
> drm_of_component_match_add.
> 
> Signed-off-by: Sean Anderson <sean.anderson@...o.com>

Acked-by: Jyri Sarha <jyri.sarhaı@iki.fi>

Also tested that Beaglebone-Black HDMI audio, that relies on componet system, still works. So for tilcdc:

Tested-by: Jyri Sarha <jyri.sarha@....fi>

> ---
> 
> .../gpu/drm/arm/display/komeda/komeda_drv.c | 6 ++--
> drivers/gpu/drm/arm/hdlcd_drv.c | 9 +-----
> drivers/gpu/drm/arm/malidp_drv.c | 11 +------
> drivers/gpu/drm/armada/armada_drv.c | 10 ++++---
> drivers/gpu/drm/drm_of.c | 29 +++----------------
> drivers/gpu/drm/etnaviv/etnaviv_drv.c | 4 +--
> .../gpu/drm/hisilicon/kirin/kirin_drm_drv.c | 3 +-
> drivers/gpu/drm/ingenic/ingenic-drm-drv.c | 3 +-
> drivers/gpu/drm/mediatek/mtk_drm_drv.c | 4 +--
> drivers/gpu/drm/msm/msm_drv.c | 14 ++++-----
> drivers/gpu/drm/sti/sti_drv.c | 3 +-
> drivers/gpu/drm/sun4i/sun4i_drv.c | 3 +-
> drivers/gpu/drm/tilcdc/tilcdc_external.c | 10 ++-----
> include/drm/drm_of.h | 12 --------
> 14 files changed, 33 insertions(+), 88 deletions(-)
> 
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_drv.c b/drivers/gpu/drm/arm/display/komeda/komeda_drv.c
> index 9fce4239d4ad..e5bf439b799f 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_drv.c
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_drv.c
> @@ -103,10 +103,8 @@ static void komeda_add_slave(struct device *master,
>  struct device_node *remote;
> 
>  remote = of_graph_get_remote_node(np, port, endpoint);
> - if (remote) {
> - drm_of_component_match_add(master, match, component_compare_of, remote);
> - of_node_put(remote);
> - }
> + if (remote)
> + component_match_add_of(master, match, remote);
> }
> 
> static int komeda_platform_probe(struct platform_device *pdev)
> diff --git a/drivers/gpu/drm/arm/hdlcd_drv.c b/drivers/gpu/drm/arm/hdlcd_drv.c
> index a032003c340c..18e58863a2f1 100644
> --- a/drivers/gpu/drm/arm/hdlcd_drv.c
> +++ b/drivers/gpu/drm/arm/hdlcd_drv.c
> @@ -352,11 +352,6 @@ static const struct component_master_ops hdlcd_master_ops = {
>  .unbind = hdlcd_drm_unbind,
> };
> 
> -static int compare_dev(struct device *dev, void *data)
> -{
> - return dev->of_node == data;
> -}
> -
> static int hdlcd_probe(struct platform_device *pdev)
> {
>  struct device_node *port;
> @@ -367,9 +362,7 @@ static int hdlcd_probe(struct platform_device *pdev)
>  if (!port)
>  return -ENODEV;
> 
> - drm_of_component_match_add(&pdev->dev, &match, compare_dev, port);
> - of_node_put(port);
> -
> + component_match_add_of(&pdev->dev, &match, port);
>  return component_master_add_with_match(&pdev->dev, &hdlcd_master_ops,
>  match);
> }
> diff --git a/drivers/gpu/drm/arm/malidp_drv.c b/drivers/gpu/drm/arm/malidp_drv.c
> index 1d0b0c54ccc7..aace8b87c6d3 100644
> --- a/drivers/gpu/drm/arm/malidp_drv.c
> +++ b/drivers/gpu/drm/arm/malidp_drv.c
> @@ -926,13 +926,6 @@ static const struct component_master_ops malidp_master_ops = {
>  .unbind = malidp_unbind,
> };
> 
> -static int malidp_compare_dev(struct device *dev, void *data)
> -{
> - struct device_node *np = data;
> -
> - return dev->of_node == np;
> -}
> -
> static int malidp_platform_probe(struct platform_device *pdev)
> {
>  struct device_node *port;
> @@ -946,9 +939,7 @@ static int malidp_platform_probe(struct platform_device *pdev)
>  if (!port)
>  return -ENODEV;
> 
> - drm_of_component_match_add(&pdev->dev, &match, malidp_compare_dev,
> - port);
> - of_node_put(port);
> + component_match_add_of(&pdev->dev, &match, port);
>  return component_master_add_with_match(&pdev->dev, &malidp_master_ops,
>  match);
> }
> diff --git a/drivers/gpu/drm/armada/armada_drv.c b/drivers/gpu/drm/armada/armada_drv.c
> index 0643887800b4..c0211ad7a45d 100644
> --- a/drivers/gpu/drm/armada/armada_drv.c
> +++ b/drivers/gpu/drm/armada/armada_drv.c
> @@ -184,10 +184,12 @@ static void armada_add_endpoints(struct device *dev,
> 
>  for_each_endpoint_of_node(dev_node, ep) {
>  remote = of_graph_get_remote_port_parent(ep);
> - if (remote of_device_is_available(remote))
> - drm_of_component_match_add(dev, match, component_compare_of,
> - remote);
> - of_node_put(remote);
> + if (remote) {
> + if (of_device_is_available(remote))
> + component_match_add_of(dev, match, remote);
> + else
> + of_node_put(remote);
> + }
>  }
> }
> 
> diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c
> index 7bbcb999bb75..0a474729ddf6 100644
> --- a/drivers/gpu/drm/drm_of.c
> +++ b/drivers/gpu/drm/drm_of.c
> @@ -78,24 +78,6 @@ uint32_t drm_of_find_possible_crtcs(struct drm_device *dev,
> }
> EXPORT_SYMBOL(drm_of_find_possible_crtcs);
> 
> -/**
> - * drm_of_component_match_add - Add a component helper OF node match rule
> - * @master: master device
> - * @matchptr: component match pointer
> - * @compare: compare function used for matching component
> - * @node: of_node
> - */
> -void drm_of_component_match_add(struct device *master,
> - struct component_match **matchptr,
> - int (*compare)(struct device *, void *),
> - struct device_node *node)
> -{
> - of_node_get(node);
> - component_match_add_release(master, matchptr, component_release_of,
> - compare, node);
> -}
> -EXPORT_SYMBOL_GPL(drm_of_component_match_add);
> -
> /**
> * drm_of_component_probe - Generic probe function for a component based master
> * @dev: master device containing the OF node
> @@ -130,10 +112,9 @@ int drm_of_component_probe(struct device *dev,
>  break;
> 
>  if (of_device_is_available(port->parent))
> - drm_of_component_match_add(dev, &match, compare_of,
> - port);
> -
> - of_node_put(port);
> + component_match_add_of(dev, &match, port);
> + else
> + of_node_put(port);
>  }
> 
>  if (i == 0) {
> @@ -171,9 +152,7 @@ int drm_of_component_probe(struct device *dev,
>  continue;
>  }
> 
> - drm_of_component_match_add(dev, &match, compare_of,
> - remote);
> - of_node_put(remote);
> + component_match_add_of(dev, &match, remote);
>  }
>  of_node_put(port);
>  }
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.c b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
> index 1d2b4fb4bcf8..4a0dba34a6e7 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_drv.c
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
> @@ -590,8 +590,8 @@ static int etnaviv_pdev_probe(struct platform_device *pdev)
>  if (!first_node)
>  first_node = core_node;
> 
> - drm_of_component_match_add(&pdev->dev, &match,
> - component_compare_of, core_node);
> + of_node_get(core_node);
> + component_match_add_of(&pdev->dev, &match, core_node);
>  }
>  } else {
>  char **names = dev->platform_data;
> diff --git a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c
> index 73ee7f25f734..fc736759274f 100644
> --- a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c
> +++ b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c
> @@ -273,8 +273,7 @@ static int kirin_drm_platform_probe(struct platform_device *pdev)
>  if (!remote)
>  return -ENODEV;
> 
> - drm_of_component_match_add(dev, &match, component_compare_of, remote);
> - of_node_put(remote);
> + component_match_add_of(dev, &match, remote);
> 
>  return component_master_add_with_match(dev, &kirin_drm_ops, match);
> }
> diff --git a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
> index ab0515d2c420..75a19e6b85c0 100644
> --- a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
> +++ b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
> @@ -1445,8 +1445,7 @@ static int ingenic_drm_probe(struct platform_device *pdev)
>  if (!np)
>  return ingenic_drm_bind(dev, false);
> 
> - drm_of_component_match_add(dev, &match, component_compare_of, np);
> - of_node_put(np);
> + component_match_add_of(dev, &match, np);
> 
>  return component_master_add_with_match(dev, &ingenic_master_ops, match);
> }
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> index 91f58db5915f..9ca265129659 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> @@ -779,8 +779,8 @@ static int mtk_drm_probe(struct platform_device *pdev)
>  comp_type == MTK_DSI) {
>  dev_info(dev, "Adding component match for %pOF\n",
>  node);
> - drm_of_component_match_add(dev, &match, component_compare_of,
> - node);
> + of_node_get(node);
> + component_match_add_of(dev, &match, node);
>  }
> 
>  ret = mtk_ddp_comp_init(node, &private->ddp_comp[comp_id], comp_id);
> diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
> index 28034c21f6bc..1152da3d58dc 100644
> --- a/drivers/gpu/drm/msm/msm_drv.c
> +++ b/drivers/gpu/drm/msm/msm_drv.c
> @@ -5,6 +5,7 @@
> * Author: Rob Clark <robdclark@...il.com>
> */
> 
> +#include <linux/component.h>
> #include <linux/dma-mapping.h>
> #include <linux/fault-inject.h>
> #include <linux/kthread.h>
> @@ -1148,10 +1149,9 @@ static int add_components_mdp(struct device *master_dev,
>  continue;
> 
>  if (of_device_is_available(intf))
> - drm_of_component_match_add(master_dev, matchptr,
> - component_compare_of, intf);
> -
> - of_node_put(intf);
> + component_match_add_of(master_dev, matchptr, intf);
> + else
> + of_node_put(intf);
>  }
> 
>  return 0;
> @@ -1180,9 +1180,9 @@ static int add_gpu_components(struct device *dev,
>  return 0;
> 
>  if (of_device_is_available(np))
> - drm_of_component_match_add(dev, matchptr, component_compare_of, np);
> -
> - of_node_put(np);
> + component_match_add_of(dev, matchptr, np);
> + else
> + of_node_put(np);
> 
>  return 0;
> }
> diff --git a/drivers/gpu/drm/sti/sti_drv.c b/drivers/gpu/drm/sti/sti_drv.c
> index 7abf010a3293..3ae4b73dfa92 100644
> --- a/drivers/gpu/drm/sti/sti_drv.c
> +++ b/drivers/gpu/drm/sti/sti_drv.c
> @@ -238,8 +238,7 @@ static int sti_platform_probe(struct platform_device *pdev)
>  child_np = of_get_next_available_child(node, NULL);
> 
>  while (child_np) {
> - drm_of_component_match_add(dev, &match, component_compare_of,
> - child_np);
> + component_match_add_of(dev, &match, child_np);
>  child_np = of_get_next_available_child(node, child_np);
>  }
> 
> diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c b/drivers/gpu/drm/sun4i/sun4i_drv.c
> index d06ffd99d86e..a67c2010c7a2 100644
> --- a/drivers/gpu/drm/sun4i/sun4i_drv.c
> +++ b/drivers/gpu/drm/sun4i/sun4i_drv.c
> @@ -323,7 +323,8 @@ static int sun4i_drv_add_endpoints(struct device *dev,
>  of_device_is_available(node))) {
>  /* Add current component */
>  DRM_DEBUG_DRIVER("Adding component %pOF\n", node);
> - drm_of_component_match_add(dev, match, component_compare_of, node);
> + of_node_get(node);
> + component_match_add_of(dev, match, node);
>  count++;
>  }
> 
> diff --git a/drivers/gpu/drm/tilcdc/tilcdc_external.c b/drivers/gpu/drm/tilcdc/tilcdc_external.c
> index 3b86d002ef62..0138ce02a64f 100644
> --- a/drivers/gpu/drm/tilcdc/tilcdc_external.c
> +++ b/drivers/gpu/drm/tilcdc/tilcdc_external.c
> @@ -155,11 +155,6 @@ int tilcdc_attach_external_device(struct drm_device *ddev)
>  return ret;
> }
> 
> -static int dev_match_of(struct device *dev, void *data)
> -{
> - return dev->of_node == data;
> -}
> -
> int tilcdc_get_external_components(struct device *dev,
>  struct component_match **match)
> {
> @@ -173,7 +168,8 @@ int tilcdc_get_external_components(struct device *dev,
>  }
> 
>  if (match)
> - drm_of_component_match_add(dev, match, dev_match_of, node);
> - of_node_put(node);
> + component_match_add_of(dev, match, node);
> + else
> + of_node_put(node);
>  return 1;
> }
> diff --git a/include/drm/drm_of.h b/include/drm/drm_of.h
> index 10ab58c40746..685c44dc1dae 100644
> --- a/include/drm/drm_of.h
> +++ b/include/drm/drm_of.h
> @@ -33,10 +33,6 @@ uint32_t drm_of_crtc_port_mask(struct drm_device *dev,
>  struct device_node *port);
> uint32_t drm_of_find_possible_crtcs(struct drm_device *dev,
>  struct device_node *port);
> -void drm_of_component_match_add(struct device *master,
> - struct component_match **matchptr,
> - int (*compare)(struct device *, void *),
> - struct device_node *node);
> int drm_of_component_probe(struct device *dev,
>  int (*compare_of)(struct device *, void *),
>  const struct component_master_ops *m_ops);
> @@ -69,14 +65,6 @@ static inline uint32_t drm_of_find_possible_crtcs(struct drm_device *dev,
>  return 0;
> }
> 
> -static inline void
> -drm_of_component_match_add(struct device *master,
> - struct component_match **matchptr,
> - int (*compare)(struct device *, void *),
> - struct device_node *node)
> -{
> -}
> -
> static inline int
> drm_of_component_probe(struct device *dev,
>  int (*compare_of)(struct device *, void *),
> -- 
> 2.35.1.1320.gc452695387.dirty
>

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