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Tue, 24 Mar 2026 12:23:58 -0700 (PDT) Received: from razdolb ([77.220.204.220]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-38c34a2db0bsm6416851fa.21.2026.03.24.12.23.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 Mar 2026 12:23:58 -0700 (PDT) References: <20250303-b4-rkisp-noncoherent-v4-0-e32e843fb6ef@gmail.com> User-agent: mu4e 1.10.9; emacs 30.2 From: Mikhail Rudenko To: Jacopo Mondi Cc: Dafna Hirschfeld , Laurent Pinchart , Mauro Carvalho Chehab , Heiko Stuebner , Tomasz Figa , Marek Szyprowski , Hans Verkuil , Sergey Senozhatsky , linux-media@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Mauro Carvalho Chehab , stable@vger.kernel.org Subject: Re: [PATCH v4 0/2] Allow non-coherent video capture buffers on Rockchip ISP V1 Date: Tue, 24 Mar 2026 22:12:33 +0300 In-reply-to: Message-ID: <87ecl9f2uv.fsf@gmail.com> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain Hi, Jacopo! On 2026-03-23 at 17:03 +01, Jacopo Mondi wrote: > Hello > > On Mon, Mar 03, 2025 at 02:40:08PM +0300, Mikhail Rudenko wrote: >> This small series adds support for non-coherent video capture buffers >> on Rockchip ISP V1. Patch 1 fixes cache management for dmabuf's >> allocated by dma-contig allocator. Patch 2 allows non-coherent >> allocations on the rkisp1 capture queue. Some timing measurements are >> provided in the commit message of patch 2. >> >> Signed-off-by: Mikhail Rudenko > > I regularly get back to this series everytime I have to reason about > the caching policies in vb2.. > > Is there any reason why it didn't get in ? My impression is that all the review comments were addressed, but these patches somehow fell through the cracks. I can rebase and post v5 if any maintainer is interested in picking it up. >> --- >> Changes in v4: >> - rebase to media/next >> - use `direction` instead of `buf->dma_dir` in dma_sync_sgtable_* >> - Link to v3: https://lore.kernel.org/r/20250128-b4-rkisp-noncoherent-v3-0-baf39c997d2a@gmail.com >> >> Changes in v3: >> - ignore skip_cache_sync_* flags in vb2_dc_dmabuf_ops_{begin,end}_cpu_access >> - invalidate/flush kernel mappings as appropriate if they exist >> - use dma_sync_sgtable_* instead of dma_sync_sg_* >> - Link to v2: https://lore.kernel.org/r/20250115-b4-rkisp-noncoherent-v2-0-0853e1a24012@gmail.com >> >> Changes in v2: >> - Fix vb2_dc_dmabuf_ops_{begin,end}_cpu_access() for non-coherent buffers. >> - Add cache management timing information to patch 2 commit message. >> - Link to v1: https://lore.kernel.org/r/20250102-b4-rkisp-noncoherent-v1-1-bba164f7132c@gmail.com >> >> --- >> Mikhail Rudenko (2): >> media: videobuf2: Fix dmabuf cache sync/flush in dma-contig >> media: rkisp1: Allow non-coherent video capture buffers >> >> .../media/common/videobuf2/videobuf2-dma-contig.c | 22 ++++++++++++++++++++++ >> .../platform/rockchip/rkisp1/rkisp1-capture.c | 1 + >> 2 files changed, 23 insertions(+) >> --- >> base-commit: b2c4bf0c102084e77ed1b12090d77a76469a6814 >> change-id: 20241231-b4-rkisp-noncoherent-ad6e7c7a68ba >> >> Best regards, >> -- >> Mikhail Rudenko >> >> -- Best regards, Mikhail Rudenko