linux-kernel - Re: [PATCH v2 8/8] drm: zynqmp_dp: Add debugfs interface for compliance testing

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Message-ID: <7aa16340-6a87-4110-8114-c1b863b100c9@ideasonboard.com>
Date: Wed, 20 Mar 2024 09:49:12 +0200
From: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
To: Sean Anderson <sean.anderson@...ux.dev>
Cc: Michal Simek <michal.simek@....com>, David Airlie <airlied@...il.com>,
 linux-kernel@...r.kernel.org, Daniel Vetter <daniel@...ll.ch>,
 linux-arm-kernel@...ts.infradead.org,
 Laurent Pinchart <laurent.pinchart@...asonboard.com>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH v2 8/8] drm: zynqmp_dp: Add debugfs interface for
 compliance testing

On 20/03/2024 00:51, Sean Anderson wrote:

> +/**
> + * enum test_pattern - Test patterns for test testing

"for test testing"? =)

> @@ -1655,6 +2321,9 @@ static void zynqmp_dp_hpd_irq_work_func(struct work_struct *work)
>   	u8 status[DP_LINK_STATUS_SIZE + 2];
>   	int err;
>   
> +	if (READ_ONCE(dp->ignore_hpd))
> +		return;
> +
>   	mutex_lock(&dp->lock);
>   	err = drm_dp_dpcd_read(&dp->aux, DP_SINK_COUNT, status,
>   			       DP_LINK_STATUS_SIZE + 2);

Why do you need READ/WRITE_ONCE() for ignore_hpd?

  Tomi