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Received: from AM7PR04MB7046.eurprd04.prod.outlook.com (2603:10a6:20b:113::22) by GVXPR04MB10429.eurprd04.prod.outlook.com (2603:10a6:150:1da::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9137.16; Fri, 19 Sep 2025 09:18:39 +0000 Received: from AM7PR04MB7046.eurprd04.prod.outlook.com ([fe80::4609:64af:8a4b:fd64]) by AM7PR04MB7046.eurprd04.prod.outlook.com ([fe80::4609:64af:8a4b:fd64%6]) with mapi id 15.20.9137.012; Fri, 19 Sep 2025 09:18:39 +0000 Message-ID: <77840bf0-7dec-485b-a531-aa12b033ee45@nxp.com> Date: Fri, 19 Sep 2025 17:20:09 +0800 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 00/14] drm/imx: dc: Use prefetch engine From: Liu Ying To: Philipp Zabel , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Dmitry Baryshkov Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20250704-imx8-dc-prefetch-v1-0-784c03fd645f@nxp.com> <10a9b4e1-c777-4e63-86f6-134d6100d70a@nxp.com> Content-Language: en-US In-Reply-To: <10a9b4e1-c777-4e63-86f6-134d6100d70a@nxp.com> Content-Type: text/plain; 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It prefetches data from >> DDR, resolves data in tile formats if needed and outputs the result >> data to FetchUnit(s). When one PRG is used, a prefetch engine supports >> processing pixel formats with one planar, e.g., RGB formats. When two >> are used, pixel formats with two planars are supported, e.g., NV12. >> >> For now, this patch series only supports prefetch engines with one PRG >> because it is enough for XRGB8888 which is the only pixel format >> supported by imx8-dc plane driver. Two PRGs would be supported by >> future patches. >> >> Patch 1 and 2 add dt-bindings for DPRC and PRG. They were reviewed >> by Rob[1][2]. I slightly modified the patches' commit message to use >> imperative mood. >> >> Patch 3 adds DPRC and PRG dt-binding files to MAINTAINERS. >> >> Patch 4 fixes FetchUnit dimensions as related to prefetch engine function. >> >> Patch 5 disables CRTC at boot if needed to support prefetch engine better. >> >> Patch 6 and 7 add PRG and DPRC drivers. >> >> Patch 8 to 13 do preparations before using prefetch engine in imx8-dc KMS >> driver. >> >> Patch 14 uses prefetch engine in imx8-dc KMS driver. >> >> [1] https://lore.kernel.org/lkml/20201207165945.GA430214@robh.at.kernel.org/ >> [2] https://lore.kernel.org/lkml/20201207170206.GA434964@robh.at.kernel.org/ >> >> Signed-off-by: Liu Ying >> --- >> Liu Ying (14): >> dt-bindings: display: imx: Add i.MX8qxp/qm PRG binding >> dt-bindings: display: imx: Add i.MX8qxp/qm DPR channel binding >> MAINTAINERS: Add i.MX8qxp prefetch engine DT binding files >> drm/imx: dc-fu: Fix dimensions >> drm/imx: dc-crtc: Disable at boot >> drm/imx: dc: Add PRG support >> drm/imx: dc: Add DPR channel support >> drm/imx: dc: Use TCON operation mode >> drm/imx: dc-ed: Support getting source selection >> drm/imx: dc-lb: Support getting secondary input selection >> drm/imx: dc-ed: Drop initial source selection >> drm/imx: dc-lb: Drop initial primary and secondary input selections >> drm/imx: dc-fu: Get DPR channel >> drm/imx: dc: Use prefetch engine >> >> .../bindings/display/imx/fsl,imx8qxp-dprc.yaml | 100 +++++ >> .../bindings/display/imx/fsl,imx8qxp-prg.yaml | 60 +++ >> MAINTAINERS | 2 + >> drivers/gpu/drm/imx/dc/Kconfig | 1 + >> drivers/gpu/drm/imx/dc/Makefile | 6 +- >> drivers/gpu/drm/imx/dc/dc-crtc.c | 191 +++++++- >> drivers/gpu/drm/imx/dc/dc-de.h | 2 + >> drivers/gpu/drm/imx/dc/dc-dprc.c | 499 +++++++++++++++++++++ >> drivers/gpu/drm/imx/dc/dc-dprc.h | 35 ++ >> drivers/gpu/drm/imx/dc/dc-drv.c | 7 + >> drivers/gpu/drm/imx/dc/dc-drv.h | 5 + >> drivers/gpu/drm/imx/dc/dc-ed.c | 27 +- >> drivers/gpu/drm/imx/dc/dc-fl.c | 7 +- >> drivers/gpu/drm/imx/dc/dc-fu.c | 49 +- >> drivers/gpu/drm/imx/dc/dc-fu.h | 11 +- >> drivers/gpu/drm/imx/dc/dc-fw.c | 7 +- >> drivers/gpu/drm/imx/dc/dc-kms.h | 7 + >> drivers/gpu/drm/imx/dc/dc-lb.c | 23 +- >> drivers/gpu/drm/imx/dc/dc-pe.h | 2 + >> drivers/gpu/drm/imx/dc/dc-plane.c | 46 +- >> drivers/gpu/drm/imx/dc/dc-prg.c | 335 ++++++++++++++ >> drivers/gpu/drm/imx/dc/dc-prg.h | 39 ++ >> drivers/gpu/drm/imx/dc/dc-tc.c | 114 ++++- >> 23 files changed, 1545 insertions(+), 30 deletions(-) >> --- >> base-commit: 50c8770a42faf8b1c7abe93e7c114337f580a97d >> change-id: 20250703-imx8-dc-prefetch-028e306591c6 >> >> Best regards, > > Gentle ping. Ping for review again. -- Regards, Liu Ying