linux-kernel - Re: [PATCH v1 3/5] drm/msm/dp: delete EV_HPD_INIT

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Message-ID: <b70e6e98-e5a8-71d7-891a-889c268a7e06@linaro.org>
Date:   Sat, 8 Jul 2023 03:34:15 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Kuogee Hsieh <quic_khsieh@...cinc.com>,
        dri-devel@...ts.freedesktop.org, robdclark@...il.com,
        sean@...rly.run, swboyd@...omium.org, dianders@...omium.org,
        vkoul@...nel.org, daniel@...ll.ch, airlied@...il.com,
        agross@...nel.org, andersson@...nel.org
Cc:     quic_abhinavk@...cinc.com, quic_jesszhan@...cinc.com,
        quic_sbillaka@...cinc.com, marijn.suijten@...ainline.org,
        freedreno@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 3/5] drm/msm/dp: delete EV_HPD_INIT_SETUP

On 08/07/2023 02:52, Kuogee Hsieh wrote:
> EV_HPD_INIT_SETUP flag is used to trigger the initialization of external
> DP host controller. Since external DP host controller initialization had
> been incorporated into pm_runtime_resume(), this flag become obsolete.
> Lets get rid of it.

And another question. Between patches #2 and #3 we have both INIT_SETUP 
event and the PM doing dp_display_host_init(). Will it work correctly?

> 
> Signed-off-by: Kuogee Hsieh <quic_khsieh@...cinc.com>
> ---
>   drivers/gpu/drm/msm/dp/dp_display.c | 12 ------------
>   1 file changed, 12 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
> index 2c5706a..44580c2 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> @@ -55,7 +55,6 @@ enum {
>   enum {
>   	EV_NO_EVENT,
>   	/* hpd events */
> -	EV_HPD_INIT_SETUP,
>   	EV_HPD_PLUG_INT,
>   	EV_IRQ_HPD_INT,
>   	EV_HPD_UNPLUG_INT,
> @@ -1119,9 +1118,6 @@ static int hpd_event_thread(void *data)
>   		spin_unlock_irqrestore(&dp_priv->event_lock, flag);
>   
>   		switch (todo->event_id) {
> -		case EV_HPD_INIT_SETUP:
> -			dp_display_host_init(dp_priv);
> -			break;
>   		case EV_HPD_PLUG_INT:
>   			dp_hpd_plug_handle(dp_priv, todo->data);
>   			break;
> @@ -1483,15 +1479,7 @@ void __exit msm_dp_unregister(void)
>   
>   void msm_dp_irq_postinstall(struct msm_dp *dp_display)
>   {
> -	struct dp_display_private *dp;
> -
> -	if (!dp_display)
> -		return;
> -
> -	dp = container_of(dp_display, struct dp_display_private, dp_display);
>   
> -	if (!dp_display->is_edp)
> -		dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 0);
>   }
>   
>   bool msm_dp_wide_bus_available(const struct msm_dp *dp_display)

-- 
With best wishes
Dmitry