From: Peter Stuge <peter@stuge.se>
To: "Noralf Trønnes" <noralf@tronnes.org>
Cc: Lubomir Rintel <lkundrak@v3.sk>,
linux-usb@vger.kernel.org, sam@ravnborg.org,
dri-devel@lists.freedesktop.org, balbi@kernel.org
Subject: Re: [PATCH v3 0/6] Generic USB Display driver
Date: Tue, 14 Jul 2020 17:40:07 +0000 [thread overview]
Message-ID: <20200714174008.16272.qmail@stuge.se> (raw)
In-Reply-To: <1280ec51-7528-b993-3110-f6c28e98832c@tronnes.org>
Hi Noralf,
Noralf Trønnes wrote:
> I would like to keep the SET_BUFFER request since it will serve as a
> syncing point between the host and the device. I'm no USB expert but I
> assume that a bulk transfer can fail halfway through and result in the
> next update starting where the previous one failed and thus writing
> beyond the end of the display buffer.
Transfers either succeed completely (possibly after many retries),
time out (after zero or more transfered bytes) or fail catastrophically
(e.g. from device disconnect).
In all cases, the driver on the host knows/has available how many bytes
were successfully transfered.
//Peter
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next prev parent reply other threads:[~2020-07-14 17:46 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-29 17:56 [PATCH v3 0/6] Generic USB Display driver Noralf Trønnes
2020-05-29 17:56 ` [PATCH v3 1/6] drm/client: Add drm_client_init_from_id() Noralf Trønnes
2020-05-29 17:56 ` [PATCH v3 2/6] drm/client: Add drm_client_modeset_disable() Noralf Trønnes
2020-05-29 17:56 ` [PATCH v3 3/6] drm/client: Add a way to set modeset, properties and rotation Noralf Trønnes
2020-05-29 17:56 ` [PATCH v3 4/6] drm: Add Generic USB Display driver Noralf Trønnes
2020-05-29 22:45 ` Peter Stuge
2020-06-01 16:57 ` Noralf Trønnes
2020-06-02 0:12 ` Peter Stuge
2020-06-02 2:32 ` Alan Stern
2020-06-02 5:21 ` Peter Stuge
2020-06-02 15:27 ` Alan Stern
2020-06-02 18:38 ` Peter Stuge
2020-06-05 12:03 ` Noralf Trønnes
2020-06-02 11:46 ` Noralf Trønnes
2020-07-14 15:30 ` Noralf Trønnes
2020-06-03 19:17 ` Noralf Trønnes
2020-05-29 17:56 ` [PATCH v3 5/6] drm/gud: Add functionality for the USB gadget side Noralf Trønnes
2020-05-29 17:56 ` [PATCH v3 6/6] usb: gadget: function: Add Generic USB Display support Noralf Trønnes
2020-06-02 17:05 ` Felipe Balbi
2020-06-02 19:14 ` Noralf Trønnes
2020-06-03 7:10 ` Felipe Balbi
2020-07-09 16:32 ` [PATCH v3 0/6] Generic USB Display driver Lubomir Rintel
2020-07-14 13:33 ` Noralf Trønnes
2020-07-14 17:40 ` Peter Stuge [this message]
2020-07-14 19:03 ` Noralf Trønnes
2020-07-14 19:38 ` Peter Stuge
2020-07-16 17:43 ` Noralf Trønnes
2020-07-15 7:30 ` Lubomir Rintel
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