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AJvYcCU84IVr1XnaO1/MyodhO1EbmjLOEPKJK8q1jcjLvEGYyqCCNvxKLe5jjcg/PsFGg9lddBvnrFMltanz@vger.kernel.org X-Gm-Message-State: AOJu0Yyomu4bu0m2DQPEYuCPT5pK5erjbHL1sDc3arWT5ZvM4gZCm/vM w/XaHjUVlIlI2GMsHBmDwAsDe6slzR7Okl0UeygIIWvZ7kWAKumvAnVDnmfGBsw= X-Google-Smtp-Source: AGHT+IHna7boyy8mgFf0qSzbxoq+xkVUaDqWJAhLT1vakdvNENJhGkjFhWLH7zjqPB/cw7NBmPFwqw== X-Received: by 2002:a05:600c:3b1a:b0:42c:c082:fafb with SMTP id 5b1f17b1804b1-42f85af0d3amr53697735e9.6.1728386144169; Tue, 08 Oct 2024 04:15:44 -0700 (PDT) Received: from [192.168.1.20] ([178.197.211.167]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-42f89ed9667sm106123185e9.47.2024.10.08.04.15.42 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 08 Oct 2024 04:15:43 -0700 (PDT) Message-ID: <313667a6-afcd-44cb-a6f6-0d550e8f68a0@linaro.org> Date: Tue, 8 Oct 2024 13:15:41 +0200 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/6] dt-bindings: media: qcom,sc8280xp-camss: Fix interrupt types To: Vladimir Zapolskiy , Bjorn Andersson Cc: Robert Foss , Todor Tomov , Bryan O'Donoghue , Konrad Dybcio , Mauro Carvalho Chehab , Hans Verkuil , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-arm-msm@vger.kernel.org, linux-media@vger.kernel.org, devicetree@vger.kernel.org References: <20240923072827.3772504-1-vladimir.zapolskiy@linaro.org> <20240923072827.3772504-2-vladimir.zapolskiy@linaro.org> <3f87e855-8779-4df3-8f26-e3d2b611d3e9@linaro.org> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzysztof.kozlowski@linaro.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 08/10/2024 12:02, Vladimir Zapolskiy wrote: > Hi Bjorn, > > On 10/6/24 05:36, Bjorn Andersson wrote: >> On Mon, Sep 23, 2024 at 10:28:22AM GMT, Vladimir Zapolskiy wrote: >>> The expected type of all CAMSS interrupts is edge rising, fix it in >>> the documented example from CAMSS device tree bindings for sc8280xp. >>> >> >> Who/what expects them to be RISING? > > I've checked CAMSS device tree bindings in a number of downstream kernels, > all of them describe interrupt types as edge rising. > > $ grep -Hn IRQF_TRIGGER drivers/media/platform/qcom/camss/* > drivers/media/platform/qcom/camss/camss-csid.c:619: IRQF_TRIGGER_RISING | IRQF_NO_AUTOEN, > drivers/media/platform/qcom/camss/camss-csiphy.c:605: IRQF_TRIGGER_RISING | IRQF_NO_AUTOEN, > drivers/media/platform/qcom/camss/camss-ispif.c:1164: IRQF_TRIGGER_RISING, ispif->irq_name, ispif); > drivers/media/platform/qcom/camss/camss-ispif.c:1168: IRQF_TRIGGER_RISING, ispif->irq_name, ispif); > drivers/media/platform/qcom/camss/camss-vfe.c:1327: IRQF_TRIGGER_RISING, vfe->irq_name, vfe); Downstream has a lot of bad code, so I am not sure how good argument this is. I acked the patch because I assumed you *checked in hardware*. > > From runtime point of view it's more important to get re-probed camss > driver, see an absolutely similar and previously discussed case (in the > cover letter): > > https://lore.kernel.org/lkml/20220530080842.37024-4-manivannan.sadhasivam@linaro.org/ > > Now in runtime I get this error, it's easy to check by unbinding/binding any > camss device: > > irq: type mismatch, failed to map hwirq-509 for interrupt-controller@17a00000! > > Basically camss devices can not be bound on the second time on the > number of platforms touched by this changeset. This is solveable different way and I do not understand this rationale. The driver should not request trigger type but use what DTS is providing, unless of course only one valid trigger is possible. But so far you did not provide any arguments for this. Downstream crappy code? Nope. Existing driver? Same. Was anything here actually checked with datasheets/hardware? Best regards, Krzysztof