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Tue, 07 Oct 2025 08:39:02 -0700 (PDT) Precedence: bulk X-Mailing-List: linux-sound@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Tue, 07 Oct 2025 16:39:01 +0100 Message-Id: From: "Alexey Klimov" To: "Neil Armstrong" Cc: "Srinivas Kandagatla" , "Liam Girdwood" , "Mark Brown" , "Jaroslav Kysela" , "Takashi Iwai" , "Rob Herring" , "Krzysztof Kozlowski" , "Conor Dooley" , "Bjorn Andersson" , "Konrad Dybcio" , , , , Subject: Re: [PATCH RFC 4/6] sm8650-hdk: Enable I2S for HDMI X-Mailer: aerc 0.20.0 References: <20251006-topic-sm8x50-next-hdk-i2s-v1-0-184b15a87e0a@linaro.org> <20251006-topic-sm8x50-next-hdk-i2s-v1-4-184b15a87e0a@linaro.org> In-Reply-To: On Tue Oct 7, 2025 at 8:04 AM BST, Neil Armstrong wrote: > On 10/7/25 03:39, Alexey Klimov wrote: >> On Mon Oct 6, 2025 at 7:37 PM BST, Neil Armstrong wrote: >>> Add the necessary nodes to configure the right I2S interface >>> to output audio via the DSI HDMI bridge. >>> >>> Signed-off-by: Neil Armstrong >>> --- >>> arch/arm64/boot/dts/qcom/sm8650-hdk.dts | 30 ++++++++++++++++++++++++= + >>> arch/arm64/boot/dts/qcom/sm8650.dtsi | 40 ++++++++++++++++++++++++= +++++++++ >>> 2 files changed, 70 insertions(+) >>> >>> diff --git a/arch/arm64/boot/dts/qcom/sm8650-hdk.dts b/arch/arm64/boot/= dts/qcom/sm8650-hdk.dts >>> index 87d7190dc991b11f5d1162aabb693dcadd198c51..1286ce95235d5544322a187= 7292cbdd426298c11 100644 >>> --- a/arch/arm64/boot/dts/qcom/sm8650-hdk.dts >>> +++ b/arch/arm64/boot/dts/qcom/sm8650-hdk.dts >>> @@ -171,6 +171,19 @@ sound { >>> "TX SWR_INPUT1", "ADC2_OUTPUT", >>> "TX SWR_INPUT3", "ADC4_OUTPUT"; >>> =20 >>> + pinctrl-0 =3D <&i2s0_default_state>, <&audio_mclk0_default_state>; >>> + pinctrl-names =3D "default"; >>> + >>> + clocks =3D <&q6prmcc LPASS_CLK_ID_PRI_MI2S_IBIT LPASS_CLK_ATTRIBUTE_= COUPLE_NO>, >>> + <&q6prmcc LPASS_CLK_ID_MCLK_1 LPASS_CLK_ATTRIBUTE_COUPLE_NO>; >>> + clock-names =3D "pri-mi2s", >>> + "pri-mclk"; >>> + >>> + assigned-clocks =3D <&q6prmcc LPASS_CLK_ID_PRI_MI2S_IBIT LPASS_CLK_A= TTRIBUTE_COUPLE_NO>, >>> + <&q6prmcc LPASS_CLK_ID_MCLK_1 LPASS_CLK_ATTRIBUTE_COUPLE_NO>; >>> + assigned-clock-rates =3D <1536000>, >>> + <24576000>; >>> + >>> wcd-playback-dai-link { >>> link-name =3D "WCD Playback"; >>> =20 >>> @@ -218,6 +231,22 @@ platform { >>> sound-dai =3D <&q6apm>; >>> }; >>> }; >>> + >>> + pri-mi2s-dai-link { >>> + link-name =3D "Primary MI2S Playback"; >>=20 >> Is it HDMI only audio playback or does it have switches to playback it a= s raw i2s >> (when external DAC is needed)? > > The HDK has i2s lines of the secondary i2s on the LS connector, but witho= ut any additional > boards connected it has no on-board i2s dacs. Ah, like on RB3 and RB5 boards. In such case the suggestion is to add mention of HDMI here in the link name= , otherwise it might be not clear what this multi i2s playback is about. Maybe "Primary MI2S/HDMI Playback" will do. Thanks, Alexey