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[83.9.29.77]) by smtp.gmail.com with ESMTPSA id u18-20020a2e91d2000000b002a8b8baf542sm2854814ljg.126.2023.05.30.05.30.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 30 May 2023 05:30:45 -0700 (PDT) From: Konrad Dybcio Date: Tue, 30 May 2023 14:30:39 +0200 Subject: [PATCH v4 05/17] media: venus: firmware: Leave a clue about obtaining CP VARs MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20230228-topic-venus-v4-5-feebb2f6e9b8@linaro.org> References: <20230228-topic-venus-v4-0-feebb2f6e9b8@linaro.org> In-Reply-To: <20230228-topic-venus-v4-0-feebb2f6e9b8@linaro.org> To: Stanimir Varbanov , Vikash Garodia , Andy Gross , Bjorn Andersson , Mauro Carvalho Chehab , Dikshita Agarwal , Bryan O'Donoghue , Mansur Alisha Shaik , Jonathan Marek , Hans Verkuil , Dikshita Agarwal Cc: Mauro Carvalho Chehab , Stanimir Varbanov , linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Marijn Suijten , Konrad Dybcio , Vikash Garodia X-Mailer: b4 0.12.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1685449837; l=1589; i=konrad.dybcio@linaro.org; s=20230215; h=from:subject:message-id; bh=v9h9rG/TP42x17XwYSGnOJ0sfKKqjUawup8lEKzjmAc=; b=J7JzvBaATX4OCVY/zIqqe/aOUY/Ubry8yNokzE+j+EO1Y/vbLIyY1ZtEZo9hQK9FF0fPaY9FB uVJ+94MKZQZAw9fX+nNMzg4Ke59YMQPbMOfbWN/jOFeIbOUw5BDoF6w X-Developer-Key: i=konrad.dybcio@linaro.org; a=ed25519; pk=iclgkYvtl2w05SSXO5EjjSYlhFKsJ+5OSZBjOkQuEms= Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org The qcom_scm_mem_protect_video_var accepts two sets of pairs as arguments. They describe the virtual address ranges of the CP (Content Protection) and CP_NONPIXEL regions. It is however not immediately obvious how to obtain these values. Leave a comment explaining how one can translate the vendor device tree properties for use with the mainline driver. Reviewed-by: Dikshita Agarwal Reviewed-by: Vikash Garodia Signed-off-by: Konrad Dybcio --- drivers/media/platform/qcom/venus/firmware.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/media/platform/qcom/venus/firmware.c b/drivers/media/platform/qcom/venus/firmware.c index cfb11c551167..572b649c56f3 100644 --- a/drivers/media/platform/qcom/venus/firmware.c +++ b/drivers/media/platform/qcom/venus/firmware.c @@ -241,6 +241,16 @@ int venus_boot(struct venus_core *core) return ret; if (core->use_tz && res->cp_size) { + /* + * Clues for porting using downstream data: + * cp_start = 0 + * cp_size = venus_ns/virtual-addr-pool[0] - yes, address and not size! + * This works, as the non-secure context bank is placed + * contiguously right after the Content Protection region. + * + * cp_nonpixel_start = venus_sec_non_pixel/virtual-addr-pool[0] + * cp_nonpixel_size = venus_sec_non_pixel/virtual-addr-pool[1] + */ ret = qcom_scm_mem_protect_video_var(res->cp_start, res->cp_size, res->cp_nonpixel_start, -- 2.40.1