Hi Laurent, Thank you for your feedback! > From: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> > Sent: 26 February 2021 12:21 > Subject: Re: [PATCH 0/7] Add FFT Support for R-Car Gen3 devices > > Hi Fabrizio, > > On Thu, Feb 25, 2021 at 10:51:40PM +0000, Fabrizio Castro wrote: > > The DAB hardware accelerator found on R-Car E3 (a.k.a. r8a77990) > > and R-Car M3-N (a.k.a. r8a77965) devices is a hardware accelerator > > for software DAB demodulators. > > It consists of one FFT (Fast Fourier Transform) module and one > > decoder module, compatible with DAB specification (ETSI EN 300 401 > > and ETSI TS 102 563). > > The decoder module can perform FIC decoding and MSC decoding > > processing from de-puncture to final decoded result. > > > > This series adds FFT support only for R-Car E3 and R-Car M3-N, > > FIC and MSC support will be added later on. > > Out of curiosity, could the FFT module be used as an accelerator for 2D > FFT on images ? I haven't tried using it that way but I don't think so. Thanks, Fab > > > Fabrizio Castro (7): > > clk: renesas: r8a77990: Add DAB clock > > clk: renesas: r8a77965: Add DAB clock > > dt-bindings: misc: Add binding for R-Car DAB > > misc: Add driver for DAB IP found on Renesas R-Car devices > > arm64: dts: renesas: r8a77990: Add DAB support > > arm64: dts: renesas: r8a77965: Add DAB support > > arm64: configs: Add R-Car DAB support > > > > .../devicetree/bindings/misc/renesas,dab.yaml | 75 ++++++++ > > MAINTAINERS | 7 + > > arch/arm64/boot/dts/renesas/r8a77965.dtsi | 12 ++ > > arch/arm64/boot/dts/renesas/r8a77990.dtsi | 12 ++ > > arch/arm64/configs/defconfig | 1 + > > drivers/clk/renesas/r8a77965-cpg-mssr.c | 1 + > > drivers/clk/renesas/r8a77990-cpg-mssr.c | 1 + > > drivers/misc/Kconfig | 1 + > > drivers/misc/Makefile | 1 + > > drivers/misc/rcar_dab/Kconfig | 11 ++ > > drivers/misc/rcar_dab/Makefile | 8 + > > drivers/misc/rcar_dab/rcar_dev.c | 176 ++++++++++++++++++ > > drivers/misc/rcar_dab/rcar_dev.h | 116 ++++++++++++ > > drivers/misc/rcar_dab/rcar_fft.c | 160 ++++++++++++++++ > > include/uapi/linux/rcar_dab.h | 35 ++++ > > 15 files changed, 617 insertions(+) > > create mode 100644 > Documentation/devicetree/bindings/misc/renesas,dab.yaml > > create mode 100644 drivers/misc/rcar_dab/Kconfig > > create mode 100644 drivers/misc/rcar_dab/Makefile > > create mode 100644 drivers/misc/rcar_dab/rcar_dev.c > > create mode 100644 drivers/misc/rcar_dab/rcar_dev.h > > create mode 100644 drivers/misc/rcar_dab/rcar_fft.c > > create mode 100644 include/uapi/linux/rcar_dab.h > > -- > Regards, > > Laurent Pinchart
