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Date: Thu, 1 Dec 2022 14:47:21 -0800 From: Doug Anderson <dianders@...omium.org> To: Vijaya Krishna Nivarthi <quic_vnivarth@...cinc.com> Cc: agross@...nel.org, andersson@...nel.org, konrad.dybcio@...aro.org, vkoul@...nel.org, linux-arm-msm@...r.kernel.org, dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org, quic_msavaliy@...cinc.com, mka@...omium.org, swboyd@...omium.org, quic_vtanuku@...cinc.com Subject: Re: [PATCH] dmaengine: qcom: gpi: Set link_rx bit on GO TRE for rx operation Hi, On Wed, Nov 30, 2022 at 4:20 AM Vijaya Krishna Nivarthi <quic_vnivarth@...cinc.com> wrote: > > As per GSI spec, link_rx bit is to be set on GO TRE on tx > channel whenever there is going to be a DMA TRE on rx > channel. This is currently set for duplex operation only. > > Set the bit for rx operation as well. > > Signed-off-by: Vijaya Krishna Nivarthi <quic_vnivarth@...cinc.com> > --- > drivers/dma/qcom/gpi.c | 1 + > 1 file changed, 1 insertion(+) I don't feel qualified to actually give this a review since I don't know anything about the details of GSI/GPI. It seems simple enough so I'll just assume that Bjorn will land it. Ideally someone else at Qualcomm would give you a Reviewed-by tag. One drive-by comment, though, is that I would say that your patch description lacks an answer to the question: "So what?" In other words, what is broken today? Does everything work fine today but some bit counter looked over your shoulder and told you that you were a bad person for not setting that bit? Did the lunar lander catch fire (despite the lack of Oxygen on the moon!) because it started using the RX transfer mode to talk to its fuel valve system and the RX transfer mode never worked? ...or maybe everything today works but the super secret Qualcomm SDM9002 (shhhh!) chip needs this bit set? Help people looking at your patch be able to decide if it's important for them to pick to their kernel tree! :-) -Doug
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