Re: [PATCH 1/5] drm/tidss: Move to newer connector model

From: Tomi Valkeinen <tomi.valkeinen@ti.com>
To: Nikhil Devshatwar <nikhil.nd@ti.com>, <dri-devel@lists.freedesktop.org>
Cc: Sekhar Nori <nsekhar@ti.com>,
	Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	Swapnil Jakhade <sjakhade@cadence.com>
Subject: Re: [PATCH 1/5] drm/tidss: Move to newer connector model
Date: Wed, 21 Oct 2020 10:47:32 +0300	[thread overview]
Message-ID: <17124389-948e-35c8-b7c1-5e419ea462cb@ti.com> (raw)
In-Reply-To: <20201016103917.26838-2-nikhil.nd@ti.com>

On 16/10/2020 13:39, Nikhil Devshatwar wrote:
> To be able to support connector operations across multiple
> bridges, it is recommended that the connector should be
> created by the SoC driver instead of the bridges.
> 
> Modify the tidss modesetting initialization sequence to
> create the connector and attach bridges with flag
> DRM_BRIDGE_ATTACH_NO_CONNECTOR
> 
> Signed-off-by: Nikhil Devshatwar <nikhil.nd@ti.com>
> ---
>  drivers/gpu/drm/tidss/tidss_drv.h |  3 +++
>  drivers/gpu/drm/tidss/tidss_kms.c | 15 ++++++++++++++-
>  2 files changed, 17 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/tidss/tidss_drv.h b/drivers/gpu/drm/tidss/tidss_drv.h
> index 7de4bba52e6f..cfbf85a4d92b 100644
> --- a/drivers/gpu/drm/tidss/tidss_drv.h
> +++ b/drivers/gpu/drm/tidss/tidss_drv.h
> @@ -27,6 +27,9 @@ struct tidss_device {
>  	unsigned int num_planes;
>  	struct drm_plane *planes[TIDSS_MAX_PLANES];
>  
> +	unsigned int num_connectors;
> +	struct drm_connector *connectors[TIDSS_MAX_PORTS];
> +
>  	spinlock_t wait_lock;	/* protects the irq masks */
>  	dispc_irq_t irq_mask;	/* enabled irqs in addition to wait_list */
>  };
> diff --git a/drivers/gpu/drm/tidss/tidss_kms.c b/drivers/gpu/drm/tidss/tidss_kms.c
> index 09485c7f0d6f..51c24b4a6a21 100644
> --- a/drivers/gpu/drm/tidss/tidss_kms.c
> +++ b/drivers/gpu/drm/tidss/tidss_kms.c
> @@ -7,6 +7,7 @@
>  #include <drm/drm_atomic.h>
>  #include <drm/drm_atomic_helper.h>
>  #include <drm/drm_bridge.h>
> +#include <drm/drm_bridge_connector.h>
>  #include <drm/drm_crtc_helper.h>
>  #include <drm/drm_fb_cma_helper.h>
>  #include <drm/drm_fb_helper.h>
> @@ -192,6 +193,7 @@ static int tidss_dispc_modeset_init(struct tidss_device *tidss)
>  	for (i = 0; i < num_pipes; ++i) {
>  		struct tidss_plane *tplane;
>  		struct tidss_crtc *tcrtc;
> +		struct drm_connector *connector;
>  		struct drm_encoder *enc;
>  		u32 hw_plane_id = feat->vid_order[tidss->num_planes];
>  		int ret;
> @@ -222,11 +224,22 @@ static int tidss_dispc_modeset_init(struct tidss_device *tidss)
>  			return PTR_ERR(enc);
>  		}
>  
> -		ret = drm_bridge_attach(enc, pipes[i].bridge, NULL, 0);
> +		ret = drm_bridge_attach(enc, pipes[i].bridge, NULL,
> +					DRM_BRIDGE_ATTACH_NO_CONNECTOR);
>  		if (ret) {
>  			dev_err(tidss->dev, "bridge attach failed: %d\n", ret);
>  			return ret;
>  		}
> +
> +		connector = drm_bridge_connector_init(&tidss->ddev, enc);
> +		if (IS_ERR(connector)) {
> +			dev_err(tidss->dev, "bridge_connector create failed\n");
> +			return PTR_ERR(connector);
> +		}
> +
> +		tidss->connectors[tidss->num_connectors++] = connector;
> +
> +		drm_connector_attach_encoder(connector, enc);

This call may return an error.

 Tomi

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