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Mon, 04 Aug 2025 06:17:59 +0000 Date: Mon, 04 Aug 2025 08:17:58 +0200 Message-ID: <87jz3j1ug9.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: <20250804030518.424229-1-wangdich9700@163.com> References: <20250804030518.424229-1-wangdich9700@163.com> 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-Rspamd-Queue-Id: 85E80219D1 X-Rspamd-Action: no action X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Spamd-Result: default: False [-3.51 / 50.00]; BAYES_HAM(-3.00)[100.00%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; 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]; MX_GOOD(-0.01)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FUZZY_RATELIMITED(0.00)[rspamd.com]; FREEMAIL_TO(0.00)[163.com]; ARC_NA(0.00)[]; FREEMAIL_ENVRCPT(0.00)[163.com,gmail.com]; FREEMAIL_CC(0.00)[gmail.com,kernel.org,perex.cz,suse.com,vger.kernel.org,alsa-project.org,lists.infradead.org,kylinos.cn]; RCVD_TLS_ALL(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_COUNT_TWO(0.00)[2]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCPT_COUNT_SEVEN(0.00)[9]; DKIM_TRACE(0.00)[suse.de:+]; TO_DN_SOME(0.00)[] X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250803_231803_014947_5E42DAA1 X-CRM114-Status: GOOD ( 23.53 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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. thanks, Takashi > > Signed-off-by: wangdicheng > --- > sound/pci/hda/patch_realtek.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c > index 877137cb09ac..88675eae9447 100644 > --- a/sound/pci/hda/patch_realtek.c > +++ b/sound/pci/hda/patch_realtek.c > @@ -1001,6 +1001,14 @@ static int alc_resume(struct hda_codec *codec) > if (!spec->no_depop_delay) > msleep(150); /* to avoid pop noise */ > codec->patch_ops.init(codec); > + > + if (codec->core.subsystem_id == 0x10ec1304) { > + snd_hda_codec_write(codec, 0x19, 0, AC_VERB_SET_PIN_WIDGET_CONTROL, 0x04); > + msleep(50); > + snd_hda_codec_write(codec, 0x19, 0, AC_VERB_SET_PIN_WIDGET_CONTROL, 0x44); > + msleep(2000); > + snd_hda_codec_write(codec, 0x19, 0, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_VREF80); > + } > snd_hda_regmap_sync(codec); > hda_call_check_power_status(codec, 0x01); > return 0; > -- > 2.25.1 >