From: Rob Clark <robdclark@gmail.com> To: dri-devel@lists.freedesktop.org Cc: freedreno@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, Rob Clark <robdclark@chromium.org>, linaro-mm-sig@lists.linaro.org (moderated list:DMA BUFFER SHARING FRAMEWORK), linux-kernel@vger.kernel.org (open list), linux-media@vger.kernel.org (open list:DMA BUFFER SHARING FRAMEWORK) Subject: [RFC 0/3] dma-fence: Add a "boost" mechanism Date: Wed, 19 May 2021 11:38:51 -0700 [thread overview] Message-ID: <20210519183855.1523927-1-robdclark@gmail.com> (raw) From: Rob Clark <robdclark@chromium.org> In some cases, like double-buffered rendering, missing vblanks can trick the GPU into running at a lower frequence, when really we want to be running at a higher frequency to not miss the vblanks in the first place. This is partially inspired by a trick i915 does, but implemented via dma-fence for a couple of reasons: 1) To continue to be able to use the atomic helpers 2) To support cases where display and gpu are different drivers The last patch is just proof of concept, in reality I think it may want to be a bit more clever. But sending this out as it is as an RFC to get feedback. Rob Clark (3): dma-fence: Add boost fence op drm/atomic: Call dma_fence_boost() when we've missed a vblank drm/msm: Wire up gpu boost drivers/gpu/drm/drm_atomic_helper.c | 11 +++++++++++ drivers/gpu/drm/msm/msm_fence.c | 10 ++++++++++ drivers/gpu/drm/msm/msm_gpu.c | 13 +++++++++++++ drivers/gpu/drm/msm/msm_gpu.h | 2 ++ include/linux/dma-fence.h | 26 ++++++++++++++++++++++++++ 5 files changed, 62 insertions(+) -- 2.30.2
WARNING: multiple messages have this Message-ID (diff)
From: Rob Clark <robdclark@gmail.com> To: dri-devel@lists.freedesktop.org Cc: Rob Clark <robdclark@chromium.org>, linux-arm-msm@vger.kernel.org, open list <linux-kernel@vger.kernel.org>, "moderated list:DMA BUFFER SHARING FRAMEWORK" <linaro-mm-sig@lists.linaro.org>, freedreno@lists.freedesktop.org, "open list:DMA BUFFER SHARING FRAMEWORK" <linux-media@vger.kernel.org> Subject: [RFC 0/3] dma-fence: Add a "boost" mechanism Date: Wed, 19 May 2021 11:38:51 -0700 [thread overview] Message-ID: <20210519183855.1523927-1-robdclark@gmail.com> (raw) From: Rob Clark <robdclark@chromium.org> In some cases, like double-buffered rendering, missing vblanks can trick the GPU into running at a lower frequence, when really we want to be running at a higher frequency to not miss the vblanks in the first place. This is partially inspired by a trick i915 does, but implemented via dma-fence for a couple of reasons: 1) To continue to be able to use the atomic helpers 2) To support cases where display and gpu are different drivers The last patch is just proof of concept, in reality I think it may want to be a bit more clever. But sending this out as it is as an RFC to get feedback. Rob Clark (3): dma-fence: Add boost fence op drm/atomic: Call dma_fence_boost() when we've missed a vblank drm/msm: Wire up gpu boost drivers/gpu/drm/drm_atomic_helper.c | 11 +++++++++++ drivers/gpu/drm/msm/msm_fence.c | 10 ++++++++++ drivers/gpu/drm/msm/msm_gpu.c | 13 +++++++++++++ drivers/gpu/drm/msm/msm_gpu.h | 2 ++ include/linux/dma-fence.h | 26 ++++++++++++++++++++++++++ 5 files changed, 62 insertions(+) -- 2.30.2
next reply other threads:[~2021-05-19 18:35 UTC|newest] Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-05-19 18:38 Rob Clark [this message] 2021-05-19 18:38 ` [RFC 0/3] dma-fence: Add a "boost" mechanism Rob Clark 2021-05-19 18:38 ` [RFC 1/3] dma-fence: Add boost fence op Rob Clark 2021-05-19 18:38 ` Rob Clark 2021-05-20 6:46 ` Christian König 2021-05-20 6:46 ` Christian König 2021-05-20 14:07 ` Rob Clark 2021-05-20 14:07 ` Rob Clark 2021-05-20 14:11 ` Christian König 2021-05-20 14:11 ` Christian König 2021-05-20 14:54 ` Rob Clark 2021-05-20 14:54 ` Rob Clark 2021-05-20 16:01 ` [Linaro-mm-sig] " Christian König 2021-05-20 16:01 ` Christian König 2021-05-20 16:34 ` Daniel Vetter 2021-05-20 16:34 ` Daniel Vetter 2021-05-20 16:40 ` Christian König 2021-05-20 17:08 ` Daniel Vetter 2021-05-20 17:08 ` Daniel Vetter 2021-05-21 7:43 ` Christian König 2021-05-21 7:43 ` Christian König 2021-05-21 14:21 ` Daniel Vetter 2021-05-21 14:21 ` Daniel Vetter 2021-05-20 16:25 ` Daniel Vetter 2021-05-20 16:25 ` Daniel Vetter 2021-05-19 18:38 ` [RFC 2/3] drm/atomic: Call dma_fence_boost() when we've missed a vblank Rob Clark 2021-05-19 18:38 ` Rob Clark 2021-05-20 16:29 ` Daniel Vetter 2021-05-20 16:29 ` Daniel Vetter 2021-05-30 14:33 ` Rob Clark 2021-05-30 14:33 ` Rob Clark 2021-06-01 14:18 ` Daniel Vetter 2021-06-01 14:18 ` Daniel Vetter 2021-06-01 15:46 ` Rob Clark 2021-06-01 15:46 ` Rob Clark 2021-06-01 16:11 ` Daniel Vetter 2021-06-01 16:11 ` Daniel Vetter 2021-05-19 18:38 ` [RFC 3/3] drm/msm: Wire up gpu boost Rob Clark 2021-05-19 18:38 ` Rob Clark
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