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[92.42.140.82]) by smtp.gmail.com with ESMTPSA id w16-20020a5d6810000000b003197b85bad2sm18909196wru.79.2023.08.23.05.20.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Aug 2023 05:20:28 -0700 (PDT) From: Jakob Unterwurzacher X-Google-Original-From: Jakob Unterwurzacher To: Rob Herring , Krzysztof Kozlowski , Heiko Stuebner Cc: jakob.unterwurzacher@theobroma-systems.com, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/2] TSD: arm64: dts: rockchip: set system-clock-fixed in sgtl5000_codec Date: Wed, 23 Aug 2023 14:20:00 +0200 Message-Id: <20230823122000.585787-2-jakob.unterwurzacher@theobroma-systems.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230823122000.585787-1-jakob.unterwurzacher@theobroma-systems.com> References: <20230823122000.585787-1-jakob.unterwurzacher@theobroma-systems.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230823_052030_128169_70E2EC3C X-CRM114-Status: GOOD ( 12.39 ) 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 Having sgtl5000_clk defines as "fixed-clock" is not enough to prevent the dai subsystem from overwriting the frequency via sgtl5000_set_dai_sysclk. Setting system-clock-fixed does the job, and now a 1kHz sine wave comes out as actually 1kHz, no matter the sample rate of the source. Testcase: These should sound the same: speaker-test -r 48000 -t sine -f 1000 speaker-test -r 24000 -t sine -f 1000 Also remove the clock link here as having it in sgtl5000 and sgtl5000_codec causes duplicate clock unprepares with associated backtrace. --- arch/arm64/boot/dts/rockchip/px30-ringneck-haikou.dts | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/rockchip/px30-ringneck-haikou.dts b/arch/arm64/boot/dts/rockchip/px30-ringneck-haikou.dts index dafeef0c2dab..2cad02096271 100644 --- a/arch/arm64/boot/dts/rockchip/px30-ringneck-haikou.dts +++ b/arch/arm64/boot/dts/rockchip/px30-ringneck-haikou.dts @@ -72,8 +72,10 @@ i2s0-sound { simple-audio-card,bitclock-master = <&sgtl5000_codec>; sgtl5000_codec: simple-audio-card,codec { - clocks = <&sgtl5000_clk>; sound-dai = <&sgtl5000>; + // Prevent the dai subsystem from overwriting the clock + // frequency. We are using a fixed-frequency oscillator. + system-clock-fixed; }; simple-audio-card,cpu {