linux-kernel - Re: [PATCH 3/3] phy: qcom: edp: Add eDP phy mode switch support

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Message-ID: <845165e6-4595-41de-8cff-d065e8f6b6be@oss.qualcomm.com>
Date: Tue, 10 Feb 2026 18:29:29 +0800
From: Yongxing Mou <yongxing.mou@....qualcomm.com>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
        Vinod Koul <vkoul@...nel.org>,
        Neil Armstrong <neil.armstrong@...aro.org>
Cc: linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] phy: qcom: edp: Add eDP phy mode switch support



On 2/6/2026 7:02 PM, Konrad Dybcio wrote:
> On 2/5/26 10:20 AM, Yongxing Mou wrote:
>> Add DP/eDP switch support by splitting the PHY swing/pre-emphasis tables
>> into separate DP and eDP configurations. This allows the driver to select
>> the correct table based on the is_edp flag.
>>
>> Add a dedicated table for the SC7280/glymur platforms, as they are not
>> compatible with the others.
>>
>> Signed-off-by: Yongxing Mou <yongxing.mou@....qualcomm.com>
>> ---
> 
> [...]
> 
>> +static const u8 edp_swing_hbr2_hbr3_v3[4][4] = {
>> +	{ 0x0b, 0x11, 0x16, 0x1b },
>> +	{ 0x0b, 0x19, 0x1f, 0xff },
>> +	{ 0x18, 0x1f, 0xff, 0xff },
>> +	{ 0x1f, 0xff, 0xff, 0xff }
>> +};
>> +
>> +static const u8 edp_pre_emp_hbr2_hbr3_v3[4][4] = {
>> +	{ 0x0c, 0x15, 0x19, 0x1e },
>> +	{ 0x09, 0x14, 0x19, 0xff },
>> +	{ 0x0f, 0x14, 0xff, 0xff },
>> +	{ 0x0d, 0xff, 0xff, 0xff }
>> +};
> 
> This is not quite in line with docs for kodiak. Now, if you have
> better/newer sequences than the HPG, I'm not objecting, but please
> cross-check
> 
> the rest of this patch I think looks fine
> 
> Konrad
Thanks for point that..
 >> +static const u8 edp_swing_hbr2_hbr3_v3[4][4] = {
 >> +	{ 0x0b, 0x11, 0x16, 0x1b },
here should be { 0x06, 0x11, 0x16, 0x1b }, arr[0][1]: 0x0b->0x06
does this looks fine? will check tables again..