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Mon, 04 Aug 2025 07:08:28 +0000 Date: Mon, 04 Aug 2025 09:08:27 +0200 Message-ID: <87h5yn1s44.wl-tiwai@suse.de> From: Takashi Iwai To: wangdich9700@163.com Cc: lgirdwood@gmail.com, broonie@kernel.org, perex@perex.cz, tiwai@suse.com, linux-kernel@vger.kernel.org, alsa-devel@alsa-project.org, linux-arm-kernel@lists.infradead.org, wangdicheng Subject: Re: [PATCH 1/2] ALSA: hda/realtek: Accelerate the front MIC charging and discharging of the 897 codec In-Reply-To: <87jz3j1ug9.wl-tiwai@suse.de> References: <20250804030518.424229-1-wangdich9700@163.com> <87jz3j1ug9.wl-tiwai@suse.de> User-Agent: Wanderlust/2.15.9 (Almost Unreal) Emacs/27.2 Mule/6.0 MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-Spamd-Result: default: False [-3.51 / 50.00]; BAYES_HAM(-3.00)[99.99%]; NEURAL_HAM_LONG(-1.00)[-1.000]; MID_CONTAINS_FROM(1.00)[]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; 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no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.9 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: On Mon, 04 Aug 2025 08:17:58 +0200, Takashi Iwai wrote: > > On Mon, 04 Aug 2025 05:05:17 +0200, > wangdich9700@163.com wrote: > > > > From: wangdicheng > > > > The front MIC capacitance of the Inspur board is too large, resulting in a longer charging and discharging time required, > > which in turn prevents recording for 5 seconds before startup. > > Therefore, software is used to increase the delay by 2 seconds to avoid this issue. > > First off, the HD-audio code was replaced in the latest Linus tree to > sound/hda/* directories, so please adapt the patches accordingly. > > About the code change: > > - The 2.5 seconds wait is way too long and inappropriate to be put in > the resume callback. It has to be fixed differently. > > - Does it apply really to all devices with 0x10ec1304? It's Realtek's > vendor id, so this can match to many devices. > > - Last but not least, it's not nice to have a code that depends on the > certain vendor id there. Again, please implement in a different way > so that it can be handled in more device-specific code rather than > the common function. One more thing: the mailing list for Linux kernel sound stuff is linux-sound@vger.kernel.org. Please use this one instead of alsa-devel ML. thanks, Takashi