Hi Quetin,
At 2024-11-14 17:38:56, "Quentin Schulz" <quentin.sch...@cherry.de> wrote:
>Hi Andy,
>
>On 11/14/24 1:50 AM, Andy Yan wrote:
>>
>> Hi,
>>
>> At 2024-05-06 15:44:36, "Quentin Schulz" <quentin.sch...@cherry.de> wrote:
>>> Hi Heiko,
>>>
>>> On 4/25/24 9:55 PM, Heiko Stuebner wrote:
>>>> From: Heiko Stuebner <heiko.stueb...@cherry.de>
>>>>
>>>> The clock is in Hz while the value checked against is in kHz, so
>>>> actual frequencies will never be able to be below to max value.
>>>> Fix this by specifying the max-value in Hz too.
>>>>
>>>> Fixes: 5a028e8f062f ("drm/rockchip: vop2: Add support for rk3588")
>>>> Signed-off-by: Heiko Stuebner <heiko.stueb...@cherry.de>
>>>> ---
>>>> drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 4 ++--
>>>> 1 file changed, 2 insertions(+), 2 deletions(-)
>>>>
>>>> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
>>>> b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
>>>> index 9bee1fd88e6a2..523880a4e8e74 100644
>>>> --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
>>>> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
>>>> @@ -1719,7 +1719,7 @@ static unsigned long rk3588_calc_cru_cfg(struct
>>>> vop2_video_port *vp, int id,
>>>> else
>>>> dclk_out_rate = v_pixclk >> 2;
>>>>
>>>> - dclk_rate = rk3588_calc_dclk(dclk_out_rate, 600000);
>>>> + dclk_rate = rk3588_calc_dclk(dclk_out_rate, 600000000);
>>>> if (!dclk_rate) {
>>>> drm_err(vop2->drm, "DP dclk_out_rate out of
>>>> range, dclk_out_rate: %ld KHZ\n",
>>>
>>> It seems the error message is incorrect as well and should be saying Hz
>>> instead of KHz. (note also the lowercase z).
>>
>> I think kHz is fine, we can find many siminary usage in drm:
>>
>> drivers/gpu/drm/drm_vblank.c
>> 656: drm_dbg_core(dev, "crtc %u: clock %d kHz framedur %d linedur %d\n",
>
>The issue is that we print kHz for something that is in Hz, not that we
>print a value in kHz.
>
>The former is incorrect, the latter is fine. We are in the former
>scenario here I believe, so it needs to be fixed.
Yes, you are right.
>
>Cheers,
>Quentin
>
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