Re: [PATCH v2 0/3] phy: qcom-qmp-pcie: Add support to keep refclk always on
From: Konrad Dybcio <hidden>
Date: 2023-11-09 13:58:07
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On 11/9/23 10:32, Krishna Chaitanya Chundru wrote:
On 11/8/2023 3:27 AM, Konrad Dybcio wrote:quoted
On 11/7/23 13:26, Krishna chaitanya chundru wrote:quoted
This series adds support to provide refclk to endpoint even in low power states. Due to some platform specific issues with CLKREQ signal, it is not being propagated to the host and as host doesn't know the clkreq signal host is not sending refclk. Due to this endpoint is seeing linkdown and going to bad state. To avoid those ref clk should be provided always to the endpoint. The issue is coming only when ep intiates the L1.1 or L1.2 exit and clkreq is not being propagated properly to the host.I'm gonna sound like a broken record, but: How much power does this consume? Would it matter if we kept this clock always-on for all platforms with this version of the phy? KonradWe see about 22mw extra power consumption with refclk always on. We can't keep this property always on as there is impact on power consumption.
Ooeheh, that's not far away from a low-clocked efficiency CPU core.. Thanks for checking! Konrad -- linux-phy mailing list linux-phy@lists.infradead.org https://lists.infradead.org/mailman/listinfo/linux-phy