From: Tomi Valkeinen <tomi.valkeinen@ti.com>
To: Boris Brezillon <boris.brezillon@collabora.com>
Cc: Swapnil Jakhade <sjakhade@cadence.com>,
Sekhar Nori <nsekhar@ti.com>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
dri-devel@lists.freedesktop.org,
Nikhil Devshatwar <nikhil.nd@ti.com>
Subject: Re: [PATCH 3/5] drm: bridge: Propagate the bus flags from bridge->timings
Date: Fri, 30 Oct 2020 10:40:46 +0200 [thread overview]
Message-ID: <def32047-de38-d50f-8fd9-31e4dcfe56b9@ti.com> (raw)
In-Reply-To: <20201030090815.7133637b@collabora.com>
Hi Boris,
On 30/10/2020 10:08, Boris Brezillon wrote:
> The "propagate output flags" and soon to be added "use
> timing->input_flags if present" logic should only be used as a fallback
> for bridges that do not support dynamic bus format/flags negotiation
> IMHO. Ideally we'd want to convert all bridges to do this dynamic bus
> format/flags negotiation and get rid of timings->input_bus_flags once
> this is done, but that's likely to take time. So, if your driver
> implements the ->atomic_check() hook and needs specific input flags,
> I'd recommend setting the input flags there instead of specifying it
> through timings->input_bus_flags.
What is bus flags negotiation? Don't we have negotiation only for bus formats? Bus flags are just
set, and the previous bridge in the chain has to use those flags.
Or do you just refer to setting the bus flags dynamically in atomic_check, versus static in
input_bus_flags?
Tomi
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next prev parent reply other threads:[~2020-10-30 8:48 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-16 10:39 [PATCH 0/5] drm/tidss: Use new connector model for tidss Nikhil Devshatwar
2020-10-16 10:39 ` [PATCH 1/5] drm/tidss: Move to newer connector model Nikhil Devshatwar
2020-10-21 7:47 ` Tomi Valkeinen
2020-10-29 22:54 ` Laurent Pinchart
2020-10-16 10:39 ` [PATCH 2/5] drm/tidss: Set bus_format correctly from bridge/connector Nikhil Devshatwar
2020-10-29 22:57 ` Laurent Pinchart
2020-11-09 11:40 ` Nikhil Devshatwar
2020-10-16 10:39 ` [PATCH 3/5] drm: bridge: Propagate the bus flags from bridge->timings Nikhil Devshatwar
2020-10-21 11:31 ` Tomi Valkeinen
2020-10-28 14:34 ` Nikhil Devshatwar
2020-10-29 22:48 ` Laurent Pinchart
2020-10-30 7:30 ` Tomi Valkeinen
2020-10-30 8:08 ` Boris Brezillon
2020-10-30 8:40 ` Tomi Valkeinen [this message]
2020-10-30 8:50 ` Boris Brezillon
2020-10-16 10:39 ` [PATCH 4/5] drm/bridge: tfp410: Support format negotiation Nikhil Devshatwar
2020-10-29 22:31 ` Laurent Pinchart
2020-10-16 10:39 ` [PATCH 5/5] drm/bridge: mhdp8564: " Nikhil Devshatwar
2020-10-28 14:40 ` Swapnil Kashinath Jakhade
2020-10-29 22:39 ` Laurent Pinchart
2020-11-02 7:25 ` Tomi Valkeinen
2020-10-19 12:11 ` [PATCH 0/5] drm/tidss: Use new connector model for tidss Tomi Valkeinen
2020-10-28 14:19 ` Nikhil Devshatwar
2020-10-29 7:14 ` Tomi Valkeinen
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