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Tue, 08 Sep 2026 08:34:59 -0700 (PDT) X-Received: by 2002:a05:620a:6089:b0:938:d7e4:7fe with SMTP id af79cd13be357-939804536d0mr3563025985a.37.1788881698939; Tue, 08 Sep 2026 08:34:58 -0700 (PDT) Received: from [192.168.68.120] ([5.133.47.210]) by smtp.googlemail.com with ESMTPSA id ffacd0b85a97d-4858ac2b4cdsm35628669f8f.16.2026.09.08.08.34.57 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 08 Sep 2026 08:34:58 -0700 (PDT) Message-ID: <9c0adaab-b725-4ce6-86cc-e57dc33bfa9d@oss.qualcomm.com> Date: Tue, 8 Sep 2026 16:34:57 +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 11/11] ASoC: codecs: add Qualcomm Tambora (WCD9378) SDCA codec To: Charles Keepax , Pierre-Louis Bossart Cc: Richard Fitzgerald , Mark Brown , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bard Liao , Jaroslav Kysela , Liam Girdwood , Maciej Strozek , Takashi Iwai , Faiz Nabi Kuchay , Jorijn van der Graaf , patches@opensource.cirrus.com, linux-sound@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org References: <7006ad74-334c-41cb-bcc8-9ef5e75dde7e@oss.qualcomm.com> <005e3c81-778a-47bc-a8ae-fb5c38ea2e2c@linux.dev> <9ed5d56c-9231-407c-ae7b-9c608c603254@oss.qualcomm.com> <4d6ed30b-65df-4f29-b0c2-245e854021df@linux.dev> Content-Language: en-US From: Srinivas Kandagatla In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=TqLWQjXh c=1 sm=1 tr=0 ts=6aa02b29 cx=c_pps a=HLyN3IcIa5EE8TELMZ618Q==:117 a=ZsC4DHZuhs/kKio7QBcDoQ==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=gowsoOTTUOVcmtlkKump:22 a=UsgDQBPQtW9oUzukNeMA:9 a=QEXdDO2ut3YA:10 a=bTQJ7kPSJx9SKPbeHEYW:22 X-Proofpoint-GUID: 8uoKaqaoYpjNr5_gL6Dl0YYGTxVqwSpG X-Proofpoint-ORIG-GUID: 8uoKaqaoYpjNr5_gL6Dl0YYGTxVqwSpG X-Proofpoint-Spam-Info: AW1haW4tMjYwOTA4MDE2NyBTYWx0ZWRfX+wIBlXyatS7X gAI1rc5FdEhvEcVulta0s40ceUE9wU2DWKqc4+DAv4CAFtqotp2M8prknoffZg7+S5+U780+5Ut EuZrNnUyJKQqXdYeruGXVEM8vXkYXAk= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTA4MDE2NyBTYWx0ZWRfX7M7s54RBNXGF xjgsLCINUBb86GgfLJPWHms6/2WZKpxxQxAsRXq11+qUY1rqdmpQgy6Do/+aUIM03go7cDPSyig coAxsLijEiEkzXDPfeghlWe/GHtK+HrbcjhZuCPALCLjC6aBd0PgfPsvt+MSlXMn9JhvgJWv/ug HTuEFBy/ddNdftRKfTV6nKIUVvYWpwWrxT5m49pHxH83Qx7X0QcZte4PTNeO5OsFIwzcn5hthbA aSaosreSvJ18GOOhZ8W836HK7fdBKKmCuufuhka4OuZhJ7taIXjnWcjTerzlzOSZIorfr6SH0Vq WVecteURJKV+6KlHyLtn/uLBd7boFWNHVCPHgpzyNjCvAsZANEDYNl9ddsttexUeoeYpaF2ATBs TP6rvx0AbeiY/ELsZcc4Ky9H0+v0168ZlPQJZJip+rsODxeUKeuCfsKt7054ZtZ/60CTS6is21f hqirpIF00OkDtVIvmPw== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-08_03,2026-09-08_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 adultscore=0 bulkscore=0 lowpriorityscore=0 spamscore=0 phishscore=0 malwarescore=0 clxscore=1015 impostorscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2609080167 On 9/8/26 4:33 PM, Charles Keepax wrote: > On Tue, Sep 08, 2026 at 04:22:53PM +0200, Pierre-Louis Bossart wrote: >>>>> That's why the current series takes the lower-overhead path >>>>> (mechanical transcription in C) rather than proposing an intermediate >>>>> DT format as part of this submission. If the concept-DT direction >>>>> gets traction at LPC 2026 DT MC, we can revisit. >>>> >>>> This part I follow slightly better, I would be happy to proceed, >>>> pending reviews with the current approach, although if Pierre >>>> is or not probably remains to be seen. >>> >>> @Pierre >>> Please let us know if you are okay with this approach of C structures. >> Now that I have more context, I don't have any objections with Srini's >> proposal. It'd a good step forward to use common class drivers across >> multiple vendors, we'll probably find a couple of bugs or harden the >> SDCA core and that'd be good progress for everyone developing or >> depending on the ASoC/SoundWire/SDCA frameworks. >> >> If this means that in an intermediate step C tables are used, that's >> fine with me. In the long run, things might change with additional >> options such as: >> a) ACPI support on all platforms >> b) DT hybrid mode to reuse ACPI/DSDT tables >> c) DT native representation of properties. >> We can review the preferred direction when the platform firmware >> plumbing improves. >> >> I believe the point about binary/opaque data was noted by Srini, it can >> be handled in multiple ways and there's no reason to block. >> >> Best to start small at the SDCA level with incremental changes later on >> how to fetch DisCo information from platform firmware - that wouldn't >> change the system behavior, only optimize by making the translation from >> DSDT to C tables un-necessary. > > Super, thanks Pierre. I will start working through a more > detailed review of the series. Thanks Charles and Pierre for reviewing this series. --srini > > Thanks, > Charles