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

[Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>]

On 2/10/26 11:29 AM, Yongxing Mou wrote:
> 
> 
> 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@oss.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..

For kodiak I see:

eDP HBR23 / low vdiff:

swing
0x0b, 0x11, 0x17, 0x1c
0x10, 0x19, 0x1f
0x19, 0x1f
0x1f

preemp
0x0c, 0x15, 0x19, 0x1e
0x08, 0x15, 0x19
0x0e, 0x14
0x0d

(notice how that mostly differs by the lowest bit being (not)set vs
your proposal)

eDP HBR23 / high vdiff:

swing
0x0a, 0x11, 0x17, 0x1f
0x0c, 0x14, 0x1d
0x15, 0x1f
0x17

preemp

0x08, 0x11, 0x17, 0x1b
0x00, 0x0c, 0x13
0x05, 0x10,
0x00

Konrad

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