linux-kernel - Re: [PATCH v12 4/4] drm/msm/dp: enable widebus feature for display port

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Date:   Fri, 1 Apr 2022 13:17:28 -0700
From:   Kuogee Hsieh <quic_khsieh@...cinc.com>
To:     Stephen Boyd <swboyd@...omium.org>, <agross@...nel.org>,
        <airlied@...ux.ie>, <bjorn.andersson@...aro.org>,
        <daniel@...ll.ch>, <dmitry.baryshkov@...aro.org>,
        <dri-devel@...ts.freedesktop.org>, <robdclark@...il.com>,
        <sean@...rly.run>, <vkoul@...nel.org>
CC:     <quic_abhinavk@...cinc.com>, <quic_aravindh@...cinc.com>,
        <quic_sbillaka@...cinc.com>, <freedreno@...ts.freedesktop.org>,
        <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v12 4/4] drm/msm/dp: enable widebus feature for display
 port


On 4/1/2022 1:00 PM, Kuogee Hsieh wrote:
> Hi Stephen,
>
>
> Would you please to help land this serial of 4 patch into msm-next?
My mistake, should be kernel v5.15
>
> Thanks,
>
> On 2/25/2022 2:17 PM, Stephen Boyd wrote:
>> Quoting Kuogee Hsieh (2022-02-25 13:23:12)
>>> Widebus feature will transmit two pixel data per pixel clock to 
>>> interface.
>>> This feature now is required to be enabled to easy migrant to higher
>>> resolution applications in future. However since some legacy chipsets
>>> does not support this feature, this feature is enabled by setting
>>> wide_bus_en flag to true within msm_dp_desc struct.
>>>
>>> changes in v2:
>>> -- remove compression related code from timing
>>> -- remove op_info from  struct msm_drm_private
>>> -- remove unnecessary wide_bus_en variables
>>> -- pass wide_bus_en into timing configuration by struct msm_dp
>>>
>>> Changes in v3:
>>> -- split patch into 3 patches
>>> -- enable widebus feature base on chip hardware revision
>>>
>>> Changes in v5:
>>> -- DP_INTF_CONFIG_DATABUS_WIDEN
>>>
>>> Changes in v6:
>>> -- static inline bool msm_dp_wide_bus_enable() in msm_drv.h
>>>
>>> Changes in v7:
>>> -- add Tested-by
>>>
>>> Changes in v9:
>>> -- add wide_bus_en to msm_dp_desc
>>>
>>> Changes in v10:
>>> -- add wide_bus_en boolean to dp_catalog struc to avoid passing it 
>>> as parameter
>>>
>>> Changes in v11:
>>> -- add const to dp_catalog_hw_revision()
>>> -- add const to msm_dp_wide_bus_available()
>>>
>>> Changes in v12:
>>> -- dp_catalog_hw_revision(const struct dp_catalog *dp_catalog)
>>> -- msm_dp_wide_bus_available(const struct msm_dp *dp_display)
>>>
>>> Signed-off-by: Kuogee Hsieh <quic_khsieh@...cinc.com>
>>> Reported-by: kernel test robot <lkp@...el.com>
>>> Tested-by: Bjorn Andersson <bjorn.andersson@...aro.org>
>>> ---
>> Reviewed-by: Stephen Boyd <swboyd@...omium.org>