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Wed, 29 Oct 2025 05:20:06 -0700 (PDT) Message-ID: <9208d2ef-79da-4e80-ac1f-e01fa5feae0a@gmail.com> Date: Wed, 29 Oct 2025 17:50:01 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1 1/1] arm64: dts: qcom: talos-evk: Add support for dual-channel LVDS panel To: Konrad Dybcio , andersson@kernel.org, konradybcio@kernel.org Cc: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20251028061636.724667-1-tessolveupstream@gmail.com> <20251028061636.724667-2-tessolveupstream@gmail.com> Content-Language: en-US From: Tessolve Upstream In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 28/10/25 14:55, Konrad Dybcio wrote: > On 10/28/25 7:16 AM, Sudarshan Shetty wrote: >> This patch introduces a new device tree for the QCS615 Talos >> EVK platform with dual-channel LVDS display support. >> >> The new DTS file (`talos-evk-lvds.dts`) is based on the existing >> `talos-evk.dts` and extends it to enable a dual-channel LVDS display >> configuration using the TI SN65DSI84 DSI-to-LVDS bridge. >> >> where channel-A carries odd pixel and channel-B carries even pixel >> on the QCS615 talos evk platform. >> >> Signed-off-by: Sudarshan Shetty >> --- > > [...] > >> + backlight: backlight { >> + compatible = "gpio-backlight"; >> + gpios = <&tlmm 115 GPIO_ACTIVE_HIGH>; >> + default-on; >> + }; >> + >> + lcd0_pwm_en { > > Use hyphens instead of underscores in node names Okay, will update in next patch. > >> + compatible = "pwm-gpio"; >> + gpios = <&tlmm 59 GPIO_ACTIVE_HIGH>; >> + pinctrl-0 = <&lcd0_bklt_pwm>; > > I think your intention was to use pwm-backlight and wire this node > up to that Soc does not support the PWM interface hence we are using gpio as "pwm-gpio" by setting the duty cycle to 100%(i.e. "no pwm") > > Konrad