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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b803d3cea32sm163553966b.34.2025.12.19.04.53.58 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 19 Dec 2025 04:53:59 -0800 (PST) Message-ID: <455edd55-132d-423d-b0c0-afc7fa40aa30@oss.qualcomm.com> Date: Fri, 19 Dec 2025 13:53:57 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 2/2] arm64: dts: qcom: x1e78100-t14s: Add audio playback over DisplayPort To: Krzysztof Kozlowski , Krzysztof Kozlowski , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Abel Vesa References: <20251217120051.98198-3-krzysztof.kozlowski@oss.qualcomm.com> <20251217120051.98198-4-krzysztof.kozlowski@oss.qualcomm.com> <2d4953c6-184d-423b-80e9-871c6e00da35@oss.qualcomm.com> <564732e7-2c86-417d-8568-69f40ea7d4da@kernel.org> <47758ce9-5ec6-4ed6-9f84-13cbdd444d75@oss.qualcomm.com> <487ff592-e67c-41c8-a398-f79aa6e5f69c@kernel.org> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <487ff592-e67c-41c8-a398-f79aa6e5f69c@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=cpSWUl4i c=1 sm=1 tr=0 ts=69454ae9 cx=c_pps a=JbAStetqSzwMeJznSMzCyw==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=wP3pNCr1ah4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=KKAkSRfTAAAA:8 a=EUspDBNiAAAA:8 a=vCpk0QvsQUMgD7SpnysA:9 a=QEXdDO2ut3YA:10 a=uxP6HrT_eTzRwkO_Te1X:22 a=cvBusfyB2V15izCimMoJ:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMjE5MDEwNiBTYWx0ZWRfX9NoWkCxu09MP O3ENI2TFUO5/0i7P1oH5jp8/ELk/AF4FD23Ff+2Pj9YeCopTYjAvcTfRFjHEUhhSMMMu76bFeI3 jqvE/APmLJPw50IO2QTayQc6RVMl+V29G5va7i4fiIywHgqu9g/8vkRXzn8V3wML3U8nmmwS3r4 MgTgIrBGw3mfajow5iyylBEqD+sQZht/zidJ6f9XrzlseaQLEmtQcAKZuHEqKG4T1ltheG4FyRW tzHqPq7jqknTT5bMcY49MjAm0HxCPmZtUklAs2zKtXfaVmWL0GlqT2DYKKhAIngs5yQn+kznD6b jSTqe6h6zWbICHwyT/DYtl2w4My3mOVT6xgGLorT0axNv3ARfKxyDEa4Jq+3xtbKHSNO9CuKRSs R9oN7jdyPFipETd7i92y9F4DokyoXf9qXueTtZHIcwUhVNy1dEiKDar7PPqCPllQY3urJHINEIh pt5kSguhmD/F79M1cfg== X-Proofpoint-GUID: BGwchZ-3pEMai9Nu02ZMuTn_9pK4MAKK X-Proofpoint-ORIG-GUID: BGwchZ-3pEMai9Nu02ZMuTn_9pK4MAKK X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-12-19_04,2025-12-17_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 clxscore=1015 suspectscore=0 bulkscore=0 phishscore=0 impostorscore=0 spamscore=0 lowpriorityscore=0 malwarescore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2512120000 definitions=main-2512190106 On 12/17/25 2:00 PM, Krzysztof Kozlowski wrote: > On 17/12/2025 13:51, Konrad Dybcio wrote: >> On 12/17/25 1:38 PM, Krzysztof Kozlowski wrote: >>> On 17/12/2025 13:33, Konrad Dybcio wrote: >>>> On 12/17/25 1:00 PM, Krzysztof Kozlowski wrote: >>>>> Add necessary DAI links and DAI name prefixes to enable audio playback >>>>> over USB/DisplayPort and HDMI. The HDMI port is not yet enabled, but it >>>>> should carry respective DAI name prefix regardless. >>>>> >>>>> Reviewed-by: Abel Vesa >>>>> Signed-off-by: Krzysztof Kozlowski >>>>> >>>>> --- >>>> >>>> (something's inserting a \n before --- in your latest patches but I >>> >>> No, it is not. It was always like that and only recently git started >>> dropping it, but it is irrelevant. >>> >>>> don't know if this is a problem) >>>> >>>> [...] >>>> >>>>> + displayport-2-dai-link { >>>>> + link-name = "DisplayPort2 Playback"; >>>>> + >>>>> + codec { >>>>> + sound-dai = <&mdss_dp2>; >>>> >>>> How does this work out with fw_devlink? >>> >>> How is this related to this patchset? Please stop nit-picking irrelevant >>> things. >> >> I'm asking whether this is going to break sync_state because you're not >> enabling mdss_dp2 - I believe that's a fair question.. > > DTS description is independent of driver, thus this is correct code > regardless whether there is interconnect involved anywhere or not. I > don't have the answer how this affects interconnect, but I see no reason > anyone would create such ICC path - between hardware and fake SW construct. sync_state isn't exclusive to the interconnect framework In any case, could you please confirm/deny that sound still works as expected with linux-next/master + this patch alone and we move on? Konrad