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Wed, 11 Sep 2024 12:58:54 +0200 (CEST) Message-ID: <4f58ebe8-78fe-41f3-9fc6-720d314c026e@perex.cz> Date: Wed, 11 Sep 2024 12:58:53 +0200 Precedence: bulk X-Mailing-List: linux-sunxi@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 01/13] ALSA: pcm: add more sample rate definitions To: Takashi Iwai , =?UTF-8?Q?P=C3=A9ter_Ujfalusi?= Cc: Pierre-Louis Bossart , Jerome Brunet , Takashi Iwai , David Rhodes , Richard Fitzgerald , Liam Girdwood , Mark Brown , Cezary Rojewski , Liam Girdwood , Bard Liao , Ranjani Sridharan , Kai Vehmanen , Srinivas Kandagatla , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , linux-sound@vger.kernel.org, linux-kernel@vger.kernel.org, patches@opensource.cirrus.com, alsa-devel@alsa-project.org, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev References: <20240905-alsa-12-24-128-v1-0-8371948d3921@baylibre.com> <20240905-alsa-12-24-128-v1-1-8371948d3921@baylibre.com> <1ab3efaa-863c-4dd0-8f81-b50fd9775fad@linux.intel.com> <87ed5q4kbe.wl-tiwai@suse.de> <5c309853-c82c-475e-b8c2-fcdcfde20efc@linux.intel.com> <87y13y31kq.wl-tiwai@suse.de> From: Jaroslav Kysela Content-Language: en-US Autocrypt: addr=perex@perex.cz; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 11. 09. 24 12:51, Takashi Iwai wrote: > On Wed, 11 Sep 2024 12:33:01 +0200, > Péter Ujfalusi wrote: >> >> On 11/09/2024 12:21, Takashi Iwai wrote: >>>> Wondering if this is backwards compatible with the alsa-lib definitions, >>>> specifically the topology parts which did unfortunately have a list of >>>> rates that will map to a different index now: >>>> >>>> >>>> typedef enum _snd_pcm_rates { >>>> SND_PCM_RATE_UNKNOWN = -1, >>>> SND_PCM_RATE_5512 = 0, >>>> SND_PCM_RATE_8000, >>>> SND_PCM_RATE_11025, >>>> SND_PCM_RATE_16000, >>>> SND_PCM_RATE_22050, >>>> SND_PCM_RATE_32000, >>>> SND_PCM_RATE_44100, >>>> SND_PCM_RATE_48000, >>>> SND_PCM_RATE_64000, >>>> SND_PCM_RATE_88200, >>>> SND_PCM_RATE_96000, >>>> SND_PCM_RATE_176400, >>>> SND_PCM_RATE_192000, >>>> SND_PCM_RATE_CONTINUOUS = 30, >>>> SND_PCM_RATE_KNOT = 31, >>>> SND_PCM_RATE_LAST = SND_PCM_RATE_KNOT, >>>> } snd_pcm_rates_t; >>> >>> As far as I understand correctly, those rate bits used for topology >>> are independent from the bits used for PCM core, although it used to >>> be the same. Maybe better to rename (such as SND_TPLG_RATE_*) so that >>> it's clearer only for topology stuff. >> >> Even if we rename these in alsa-lib we will need translation from >> SND_TPLG_RATE_ to SND_PCM_RATE_ in kernel likely? >> >> The topology files are out there and this is an ABI... >> >>> But it'd be better if anyone can double-check. >> >> Since the kernel just copies the rates bitfield, any rate above 11025 >> will be misaligned and result broken setup. > > Yep, I noticed it now, too. > > Below is the fix patch, totally untested. > It'd be appreciated if anyone can test it quickly. > > > thanks, > > Takashi > > -- 8< -- > From: Takashi Iwai > Subject: [PATCH] ALSA: pcm: Fix breakage of PCM rates used for topology > > It turned out that the topology ABI takes the standard PCM rate bits > as is, and it means that the recent change of the PCM rate bits would > lead to the inconsistent rate values used for topology. > > This patch reverts the original PCM rate bit definitions while adding > the new rates to the extended bits instead. This needed the change of > snd_pcm_known_rates, too. And this also required to fix the handling > in snd_pcm_hw_limit_rates() that blindly assumed that the list is > sorted while it became unsorted now. > > Fixes: 090624b7dc83 ("ALSA: pcm: add more sample rate definitions") > Signed-off-by: Takashi Iwai This looks fine. But the topology rate bits should not depend on those bits. It's a bit pitty that the standard PCM ABI does not use those bits for user space and we are doing this change just for topology ABI. Reviewed-by: Jaroslav Kysela -- Jaroslav Kysela Linux Sound Maintainer; ALSA Project; Red Hat, Inc.