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From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: "H. Nikolaus Schaller" <hns@goldelico.com>
Cc: Paul Cercueil <paul@crapouillou.net>,
	Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	Geert Uytterhoeven <geert+renesas@glider.be>,
	Kees Cook <keescook@chromium.org>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	Miquel Raynal <miquel.raynal@bootlin.com>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Andrzej Hajda <a.hajda@samsung.com>,
	Neil Armstrong <narmstrong@baylibre.com>,
	Robert Foss <robert.foss@linaro.org>,
	Jernej Skrabec <jernej.skrabec@gmail.com>,
	Ezequiel Garcia <ezequiel@collabora.com>,
	Harry Wentland <harry.wentland@amd.com>,
	Sam Ravnborg <sam@ravnborg.org>,
	Maxime Ripard <maxime@cerno.tech>,
	Hans Verkuil <hverkuil-cisco@xs4all.nl>,
	devicetree@vger.kernel.org, linux-mips@vger.kernel.org,
	linux-kernel@vger.kernel.org, letux-kernel@openphoenux.org,
	Paul Boddie <paul@boddie.org.uk>, Jonas Karlman <jonas@kwiboo.se>,
	dri-devel@lists.freedesktop.org
Subject: Re: [PATCH v2 8/8] [RFC] drm/ingenic: convert to component framework for jz4780 hdmi
Date: Thu, 5 Aug 2021 18:04:44 +0300	[thread overview]
Message-ID: <YQv+DC5yTEGlJYuD@pendragon.ideasonboard.com> (raw)
In-Reply-To: <77554dd2612f418f6ab74a8be06c82b71410e0e6.1628172477.git.hns@goldelico.com>

Hi Nikolaus,

Thank you for the patch.

On Thu, Aug 05, 2021 at 04:07:57PM +0200, H. Nikolaus Schaller wrote:
> This patch attempts to convert the ingenic-dw-hdmi driver
> into a version that uses the component framework.

Why ? What problem would this solve ?

> Unfortunately the new version does not work.
> 
> Debugging shows that ingenic_dw_hdmi_bind() is never called.
> 
> Suggestions for reasons and fixes are welcome.
> 
> Signed-off-by: Paul Boddie <paul@boddie.org.uk>
> Co-authored-by: Paul Boddie <paul@boddie.org.uk>
> Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
> ---
>  drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c | 57 ++++++++++++++++++-----
>  1 file changed, 46 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c b/drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c
> index 61e7a57d7cec1..a5ba0b69baa8c 100644
> --- a/drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c
> +++ b/drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c
> @@ -1,17 +1,24 @@
>  // SPDX-License-Identifier: GPL-2.0
>  /* Copyright (C) 2011-2013 Freescale Semiconductor, Inc.
> - * Copyright (C) 2019, 2020 Paul Boddie <paul@boddie.org.uk>
> + * Copyright (C) 2019, 2020, 2021 Paul Boddie <paul@boddie.org.uk>
>   *
>   * Derived from dw_hdmi-imx.c with i.MX portions removed.
> - * Probe and remove operations derived from rcar_dw_hdmi.c.
>   */
>  
> +#include <linux/component.h>
>  #include <linux/module.h>
>  #include <linux/platform_device.h>
>  #include <linux/regmap.h>
>  
>  #include <drm/bridge/dw_hdmi.h>
>  #include <drm/drm_of.h>
> +#include <drm/drm_modeset_helper_vtables.h>
> +#include <drm/drm_simple_kms_helper.h>
> +
> +struct ingenic_dw_hdmi_encoder {
> +	struct drm_encoder encoder;
> +	struct dw_hdmi *hdmi;
> +};
>  
>  static const struct dw_hdmi_mpll_config ingenic_mpll_cfg[] = {
>  	{ 45250000,  { { 0x01e0, 0x0000 }, { 0x21e1, 0x0000 }, { 0x41e2, 0x0000 } } },
> @@ -87,24 +94,52 @@ static const struct of_device_id ingenic_dw_hdmi_dt_ids[] = {
>  };
>  MODULE_DEVICE_TABLE(of, ingenic_dw_hdmi_dt_ids);
>  
> -static int ingenic_dw_hdmi_probe(struct platform_device *pdev)
> +static int ingenic_dw_hdmi_bind(struct device *dev, struct device *master,
> +				void *data)
>  {
> -	struct dw_hdmi *hdmi;
> +	struct platform_device *pdev = to_platform_device(dev);
> +	struct drm_device *drm = data;
> +	struct drm_encoder *enc;
> +	struct ingenic_dw_hdmi_encoder *hdmi_encoder;
>  
> -	hdmi = dw_hdmi_probe(pdev, &ingenic_dw_hdmi_plat_data);
> -	if (IS_ERR(hdmi))
> -		return PTR_ERR(hdmi);
> +	hdmi_encoder = drmm_simple_encoder_alloc(drm, struct ingenic_dw_hdmi_encoder,
> +						 encoder, DRM_MODE_ENCODER_TMDS);
> +	if (IS_ERR(hdmi_encoder))
> +		return PTR_ERR(hdmi_encoder);
>  
> -	platform_set_drvdata(pdev, hdmi);
> +	enc = &hdmi_encoder->encoder;
> +	drm_encoder_helper_add(enc, NULL);
> +	hdmi_encoder->hdmi = dw_hdmi_bind(pdev, enc, &ingenic_dw_hdmi_plat_data);
> +
> +	if (IS_ERR(hdmi_encoder->hdmi))
> +		return PTR_ERR(hdmi_encoder->hdmi);
> +
> +	dev_set_drvdata(dev, hdmi_encoder->hdmi);
>  
>  	return 0;
>  }
>  
> -static int ingenic_dw_hdmi_remove(struct platform_device *pdev)
> +static void ingenic_dw_hdmi_unbind(struct device *dev, struct device *master,
> +				   void *data)
> +{
> +	struct dw_hdmi *hdmi = dev_get_drvdata(dev);
> +
> +	dw_hdmi_unbind(hdmi);
> +}
> +
> +static const struct component_ops ingenic_dw_hdmi_ops = {
> +	.bind	= ingenic_dw_hdmi_bind,
> +	.unbind	= ingenic_dw_hdmi_unbind,
> +};
> +
> +static int ingenic_dw_hdmi_probe(struct platform_device *pdev)
>  {
> -	struct dw_hdmi *hdmi = platform_get_drvdata(pdev);
> +	return component_add(&pdev->dev, &ingenic_dw_hdmi_ops);
> +}
>  
> -	dw_hdmi_remove(hdmi);
> +static int ingenic_dw_hdmi_remove(struct platform_device *pdev)
> +{
> +	component_del(&pdev->dev, &ingenic_dw_hdmi_ops);
>  
>  	return 0;
>  }

-- 
Regards,

Laurent Pinchart

  reply	other threads:[~2021-08-05 15:05 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-05 14:07 [PATCH v2 0/8] MIPS: jz4780 HDMI H. Nikolaus Schaller
2021-08-05 14:07 ` [PATCH v2 1/8] drm/bridge: synopsis: Add mode_fixup and bridge timings support H. Nikolaus Schaller
2021-08-05 14:32   ` Robert Foss
2021-08-05 14:45     ` H. Nikolaus Schaller
2021-08-08  4:50     ` H. Nikolaus Schaller
2021-08-05 14:07 ` [PATCH v2 2/8] drm/ingenic: Add jz4780 Synopsys HDMI driver H. Nikolaus Schaller
2021-08-05 14:07 ` [PATCH v2 3/8] drm/ingenic: Add support for JZ4780 and HDMI output H. Nikolaus Schaller
2021-08-05 15:22   ` Paul Cercueil
2021-08-05 16:01     ` H. Nikolaus Schaller
2021-08-08  5:04     ` H. Nikolaus Schaller
2021-08-05 14:07 ` [PATCH v2 4/8] dt-bindings: display: Add ingenic-jz4780-hdmi DT Schema H. Nikolaus Schaller
2021-08-05 14:07 ` [PATCH v2 5/8] MIPS: DTS: jz4780: account for Synopsys HDMI driver and LCD controller H. Nikolaus Schaller
2021-08-05 14:07 ` [PATCH v2 6/8] MIPS: DTS: CI20: add HDMI setup H. Nikolaus Schaller
2021-08-05 14:07 ` [PATCH v2 7/8] MIPS: CI20: defconfig: configure for DRM_DW_HDMI_JZ4780 H. Nikolaus Schaller
2021-08-05 14:07 ` [PATCH v2 8/8] [RFC] drm/ingenic: convert to component framework for jz4780 hdmi H. Nikolaus Schaller
2021-08-05 15:04   ` Laurent Pinchart [this message]
2021-08-05 16:07     ` H. Nikolaus Schaller
2021-08-05 16:17       ` Paul Cercueil
2021-08-05 16:22         ` H. Nikolaus Schaller
2021-08-10  9:31         ` Daniel Vetter

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