From: Keiichi Watanabe <keiichiw@chromium.org> To: Alexandre Courbot <acourbot@chromium.org> Cc: "Gerd Hoffmann" <kraxel@redhat.com>, virtio-dev@lists.oasis-open.org, "Linux Media Mailing List" <linux-media@vger.kernel.org>, "Alex Lau" <alexlau@chromium.org>, "Daniel Vetter" <daniel@ffwll.ch>, "Dylan Reid" <dgreid@chromium.org>, "David Staessens" <dstaessens@chromium.org>, "Dmitry Sepp" <dmitry.sepp@opensynergy.com>, "Enrico Granata" <egranata@google.com>, "Frediano Ziglio" <fziglio@redhat.com>, "Hans Verkuil" <hverkuil@xs4all.nl>, "Stéphane Marchesin" <marcheu@chromium.org>, "Pawel Osciak" <posciak@chromium.org>, spice-devel@lists.freedesktop.org, "David Stevens" <stevensd@chromium.org>, "Tomasz Figa" <tfiga@chromium.org>, uril@redhat.com, "Samiullah Khawaja" <samiullah.khawaja@opensynergy.com>, "Kiran Pawar" <kiran.pawar@opensynergy.com> Subject: Re: [PATCH v3 1/2] virtio-video: Add virtio video device specification Date: Mon, 23 Mar 2020 21:07:54 +0900 [thread overview] Message-ID: <CAD90VcaYi2KawNOewRaL1QihUjgja6nLyzU+0R7nsHPN3voXDA@mail.gmail.com> (raw) In-Reply-To: <CAPBb6MVPjgLkbVjOY6O3srywNm8Zb1pMR2pGM1NinByhgFaZ_A@mail.gmail.com> Hi everyone, I have implemented a virtio-video device following my v3 spec in crosvm, which worked well together with Dmitry's driver [1]. I've started preparing v4 proposal to address problems found while implementing the driver and the devices. Regarding v3 protocol, I'm thinking about how we can differentiate 'parameters' and 'controls' in the virtio-video spec? In the previous discussion, we decided to have a profile, level and bitrate as controls because we want to query supported values for each field. But, I don't think it's a good criteria because it'd be possible to query other values in params. So, I'm thinking about what should be the difference between params and controls. If no difference, we should deprecate virtio_video_params and have every field there as a control value instead. If we add a new command to get and set multiple controls at once, this change won't cause overhead. What do you think? Is there anything I missed? If it sounds fine, I'll remove virtio_video_params from the v4 spec proposal. Best regards, Keiichi [1]: https://patchwork.linuxtv.org/patch/61717/
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From: Keiichi Watanabe <keiichiw@chromium.org> To: Alexandre Courbot <acourbot@chromium.org> Cc: "Gerd Hoffmann" <kraxel@redhat.com>, virtio-dev@lists.oasis-open.org, "Linux Media Mailing List" <linux-media@vger.kernel.org>, "Alex Lau" <alexlau@chromium.org>, "Daniel Vetter" <daniel@ffwll.ch>, "Dylan Reid" <dgreid@chromium.org>, "David Staessens" <dstaessens@chromium.org>, "Dmitry Sepp" <dmitry.sepp@opensynergy.com>, "Enrico Granata" <egranata@google.com>, "Frediano Ziglio" <fziglio@redhat.com>, "Hans Verkuil" <hverkuil@xs4all.nl>, "Stéphane Marchesin" <marcheu@chromium.org>, "Pawel Osciak" <posciak@chromium.org>, spice-devel@lists.freedesktop.org, "David Stevens" <stevensd@chromium.org>, "Tomasz Figa" <tfiga@chromium.org>, uril@redhat.com, "Samiullah Khawaja" <samiullah.khawaja@opensynergy.com>, "Kiran Pawar" <kiran.pawar@opensynergy.com> Subject: [virtio-dev] Re: [PATCH v3 1/2] virtio-video: Add virtio video device specification Date: Mon, 23 Mar 2020 21:07:54 +0900 [thread overview] Message-ID: <CAD90VcaYi2KawNOewRaL1QihUjgja6nLyzU+0R7nsHPN3voXDA@mail.gmail.com> (raw) In-Reply-To: <CAPBb6MVPjgLkbVjOY6O3srywNm8Zb1pMR2pGM1NinByhgFaZ_A@mail.gmail.com> Hi everyone, I have implemented a virtio-video device following my v3 spec in crosvm, which worked well together with Dmitry's driver [1]. I've started preparing v4 proposal to address problems found while implementing the driver and the devices. Regarding v3 protocol, I'm thinking about how we can differentiate 'parameters' and 'controls' in the virtio-video spec? In the previous discussion, we decided to have a profile, level and bitrate as controls because we want to query supported values for each field. But, I don't think it's a good criteria because it'd be possible to query other values in params. So, I'm thinking about what should be the difference between params and controls. If no difference, we should deprecate virtio_video_params and have every field there as a control value instead. If we add a new command to get and set multiple controls at once, this change won't cause overhead. What do you think? Is there anything I missed? If it sounds fine, I'll remove virtio_video_params from the v4 spec proposal. Best regards, Keiichi [1]: https://patchwork.linuxtv.org/patch/61717/ --------------------------------------------------------------------- To unsubscribe, e-mail: virtio-dev-unsubscribe@lists.oasis-open.org For additional commands, e-mail: virtio-dev-help@lists.oasis-open.org
next prev parent reply other threads:[~2020-03-23 12:08 UTC|newest] Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-02-06 10:20 [PATCH v3 0/2] Virtio video device specification Keiichi Watanabe 2020-02-06 10:20 ` [virtio-dev] " Keiichi Watanabe 2020-02-06 10:20 ` [PATCH v3 1/2] virtio-video: Add virtio " Keiichi Watanabe 2020-02-06 10:20 ` [virtio-dev] " Keiichi Watanabe 2020-02-25 9:59 ` Gerd Hoffmann 2020-02-25 9:59 ` [virtio-dev] " Gerd Hoffmann 2020-02-27 7:24 ` Keiichi Watanabe 2020-02-27 7:24 ` [virtio-dev] " Keiichi Watanabe 2020-02-27 9:28 ` Gerd Hoffmann 2020-02-27 9:28 ` [virtio-dev] " Gerd Hoffmann 2020-03-04 4:31 ` Alexandre Courbot 2020-03-04 4:31 ` [virtio-dev] " Alexandre Courbot 2020-03-04 6:42 ` Gerd Hoffmann 2020-03-04 6:42 ` [virtio-dev] " Gerd Hoffmann 2020-03-04 10:07 ` Alexandre Courbot 2020-03-04 10:07 ` [virtio-dev] " Alexandre Courbot 2020-03-23 12:07 ` Keiichi Watanabe [this message] 2020-03-23 12:07 ` Keiichi Watanabe 2020-03-23 13:28 ` Dmitry Sepp 2020-03-23 13:28 ` [virtio-dev] " Dmitry Sepp 2020-03-23 15:48 ` Keiichi Watanabe 2020-03-23 15:48 ` [virtio-dev] " Keiichi Watanabe 2020-03-25 9:47 ` Dmitry Sepp 2020-03-25 9:47 ` [virtio-dev] " Dmitry Sepp 2020-03-27 3:35 ` Keiichi Watanabe 2020-03-27 3:35 ` [virtio-dev] " Keiichi Watanabe 2020-03-30 9:53 ` Dmitry Sepp 2020-03-30 9:53 ` [virtio-dev] " Dmitry Sepp 2020-04-06 9:32 ` Alexandre Courbot 2020-04-06 9:32 ` [virtio-dev] " Alexandre Courbot 2020-04-06 11:46 ` Keiichi Watanabe 2020-04-06 11:46 ` [virtio-dev] " Keiichi Watanabe 2020-04-07 9:21 ` Dmitry Sepp 2020-04-07 9:21 ` [virtio-dev] " Dmitry Sepp 2020-04-09 10:46 ` Keiichi Watanabe 2020-04-09 10:46 ` [virtio-dev] " Keiichi Watanabe 2020-04-17 8:08 ` Dmitry Sepp 2020-04-17 8:08 ` [virtio-dev] " Dmitry Sepp 2020-04-20 9:57 ` Keiichi Watanabe 2020-04-20 9:57 ` [virtio-dev] " Keiichi Watanabe 2020-04-21 8:38 ` Dmitry Sepp 2020-04-21 8:38 ` [virtio-dev] " Dmitry Sepp 2020-04-24 11:42 ` Keiichi Watanabe 2020-04-24 11:42 ` [virtio-dev] " Keiichi Watanabe 2020-04-27 14:28 ` Dmitry Sepp 2020-04-27 14:28 ` [virtio-dev] " Dmitry Sepp 2020-04-07 14:49 ` Dmitry Sepp 2020-04-07 14:49 ` [virtio-dev] " Dmitry Sepp 2020-04-09 10:46 ` Keiichi Watanabe 2020-04-09 10:46 ` [virtio-dev] " Keiichi Watanabe 2020-04-09 13:13 ` Dmitry Sepp 2020-04-09 13:13 ` [virtio-dev] " Dmitry Sepp 2020-04-24 11:45 ` Keiichi Watanabe 2020-04-24 11:45 ` [virtio-dev] " Keiichi Watanabe 2020-04-27 9:33 ` Dmitry Sepp 2020-04-27 9:33 ` [virtio-dev] " Dmitry Sepp 2020-05-18 5:17 ` Keiichi Watanabe 2020-05-18 5:17 ` [virtio-dev] " Keiichi Watanabe 2020-05-27 12:12 ` Dmitry Sepp 2020-05-27 12:12 ` [virtio-dev] " Dmitry Sepp 2020-05-29 14:21 ` Keiichi Watanabe 2020-05-29 14:21 ` [virtio-dev] " Keiichi Watanabe 2020-06-01 7:19 ` Alexandre Courbot 2020-06-01 7:19 ` [virtio-dev] " Alexandre Courbot 2020-02-06 10:20 ` [PATCH v3 2/2] virtio-video: Define a feature for exported objects from different virtio devices Keiichi Watanabe 2020-02-06 10:20 ` [virtio-dev] " Keiichi Watanabe 2020-02-25 10:01 ` Gerd Hoffmann 2020-02-25 10:01 ` [virtio-dev] " Gerd Hoffmann 2020-02-27 7:24 ` Keiichi Watanabe 2020-02-27 7:24 ` [virtio-dev] " Keiichi Watanabe
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