[PATCH v3] drm/panthor: Add DEV_QUERY_TIMESTAMP_INFO dev query

[Boris Brezillon]

On Mon, 19 Aug 2024 13:25:08 +0200
Mary Guillemard <mary.guillemard at collabora.com> wrote:

> +/**
> + * struct drm_panthor_timestamp_info - Timestamp information
> + *
> + * Structure grouping all queryable information relating to the GPU timestamp.
> + */
> +struct drm_panthor_timestamp_info {
> +	/** @timestamp_frequency: The frequency of the timestamp timer. */
> +	__u64 timestamp_frequency;
> +
> +	/** @current_timestamp: The current timestamp. */
> +	__u64 current_timestamp;
> +
> +	/** @timestamp_offset: The offset of the timestamp timer. */
> +	__u64 timestamp_offset;

I'm not sure we should expose the offset to be honest. It looks like
something that's related to suspend/resume which only the kernel needs
to know.

> +};