linux-kernel - Re: [PATCH 3/3] phy: qcom: qmp-combo: Switch from V6 to V6 N4 register offsets

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Date: Mon, 27 May 2024 12:13:54 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Abel Vesa <abel.vesa@...aro.org>
Cc: Vinod Koul <vkoul@...nel.org>, 
	Kishon Vijay Abraham I <kishon@...nel.org>, linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org, 
	linux-kernel@...r.kernel.org, Kuogee Hsieh <quic_khsieh@...cinc.com>
Subject: Re: [PATCH 3/3] phy: qcom: qmp-combo: Switch from V6 to V6 N4
 register offsets

On Mon, May 27, 2024 at 10:20:37AM +0300, Abel Vesa wrote:
> Currently, none of the X1E80100 supported boards upstream have enabled
> DP. As for USB, the reason it is not broken when it's obvious that the
> offsets are wrong is because the only difference with respect to USB is
> the difference in register name. The V6 uses QPHY_V6_PCS_CDR_RESET_TIME
> while V6 N4 uses QPHY_V6_N4_PCS_RX_CONFIG. Now, in order for the DP to
> work, the DP serdes tables need to be added as they have different
> values for V6 N4 when compared to V6 ones, even though they use the same
> V6 offsets. While at it, switch swing and pre-emphasis tables to V6 as
> well.
> 
> Fixes: d7b3579f84f7 ("phy: qcom-qmp-combo: Add x1e80100 USB/DP combo phys")
> Co-developed-by: Kuogee Hsieh <quic_khsieh@...cinc.com>
> Signed-off-by: Kuogee Hsieh <quic_khsieh@...cinc.com>
> Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
> ---
>  drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 189 +++++++++++++++++++++++++-----
>  drivers/phy/qualcomm/phy-qcom-qmp.h       |   2 +
>  2 files changed, 162 insertions(+), 29 deletions(-)

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

-- 
With best wishes
Dmitry