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From: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
To: Jessica Zhang <jessica.zhang@oss.qualcomm.com>
Cc: Rob Clark <robin.clark@oss.qualcomm.com>,
	Abhinav Kumar <abhinav.kumar@linux.dev>,
	Dmitry Baryshkov <lumag@kernel.org>, Sean Paul <sean@poorly.run>,
	Marijn Suijten <marijn.suijten@somainline.org>,
	David Airlie <airlied@gmail.com>, Simona Vetter <simona@ffwll.ch>,
	linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org,
	freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org,
	Yongxing Mou <quic_yongmou@quicinc.com>,
	Abhinav Kumar <quic_abhinavk@quicinc.com>
Subject: Re: [PATCH 04/19] drm/msm/dp: replace ST_DISPLAY_OFF with power_on in msm_dp_hpd_unplug_handle()
Date: Tue, 15 Jul 2025 01:28:06 +0300	[thread overview]
Message-ID: <ux7tbizguenr33odq2utqdrdanih2ez6gvm2dcss37uuo6pi7y@qnh4rwrgqept> (raw)
In-Reply-To: <6883f346-452a-44b1-b670-3bd514f57b08@oss.qualcomm.com>

On Mon, Jul 14, 2025 at 01:38:55PM -0700, Jessica Zhang wrote:
> 
> 
> On 7/14/2025 5:27 AM, Dmitry Baryshkov wrote:
> > On Fri, Jul 11, 2025 at 05:58:09PM -0700, Jessica Zhang wrote:
> > > From: Abhinav Kumar <quic_abhinavk@quicinc.com>
> > > 
> > > msm_dp_hpd_unplug_handle() checks if the display was already disabled and
> > > if so does not transition to ST_DISCONNECT_PENDING state and goes directly
> > > to ST_DISCONNECTED. The same result can be achieved with the !power_on
> > > check.
> > > 
> > > Replace ST_DISPLAY_OFF with !power_on to achieve the same outcome.
> > > 
> > > Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
> > > Signed-off-by: Jessica Zhang <jessica.zhang@oss.qualcomm.com>
> > > ---
> > > Note: Taken from https://patchwork.freedesktop.org/series/142010/
> > > ---
> > >   drivers/gpu/drm/msm/dp/dp_display.c | 2 +-
> > >   1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > Please squash all state-related patches into a single one. It would make
> > it easier to review and more logical.
> 
> Hi Dmitry,
> 
> Ack -- I'd wanted to keep all the patches small, but I can squash patches
> 4-16 into 1 patch if that makes it easier for you.

I think it's easier this way: we get rid of the HPD state machine and
use flags all over the place.

-- 
With best wishes
Dmitry

  reply	other threads:[~2025-07-14 22:28 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-07-12  0:58 [PATCH 00/19] drm/msm/dp: Drop the HPD state machine Jessica Zhang
2025-07-12  0:58 ` [PATCH 01/19] drm/msm/dp: Track when DP is physically plugged in Jessica Zhang
2025-07-14 11:42   ` Dmitry Baryshkov
2025-07-12  0:58 ` [PATCH 02/19] drm/msm/dp: remove redundant checks related to ST_DISPLAY_OFF in plug/irq_ipd handlers Jessica Zhang
2025-07-12  0:58 ` [PATCH 03/19] drm/msm/dp: Return early from atomic_enable() if cable is not connected Jessica Zhang
2025-07-14 11:47   ` Dmitry Baryshkov
2025-07-12  0:58 ` [PATCH 04/19] drm/msm/dp: replace ST_DISPLAY_OFF with power_on in msm_dp_hpd_unplug_handle() Jessica Zhang
2025-07-14 12:27   ` Dmitry Baryshkov
2025-07-14 20:38     ` Jessica Zhang
2025-07-14 22:28       ` Dmitry Baryshkov [this message]
2025-07-14 20:47     ` Jessica Zhang
2025-07-12  0:58 ` [PATCH 05/19] drm/msm/dp: Replace ST_MAINLINK_READY with link_ready in plug/hpd_irq handlers Jessica Zhang
2025-07-12  0:58 ` [PATCH 06/19] drm/msm/dp: Replace ST_DISCONNECTED with checks for connected Jessica Zhang
2025-07-12  0:58 ` [PATCH 07/19] drm/msm/dp: Rework unplug handling Jessica Zhang
2025-07-12  0:58 ` [PATCH 08/19] drm/msm/dp: Don't delay plug-in handling when ST_DISCONNECT_PENDING Jessica Zhang
2025-07-12  0:58 ` [PATCH 09/19] drm/msm/dp: Replace ST_DISPLAY_OFF with power_on in atomic_enable() Jessica Zhang
2025-07-12  0:58 ` [PATCH 10/19] drm/msm/dp: Check if DP is disconnected in atomic post_disable() Jessica Zhang
2025-07-12  0:58 ` [PATCH 11/19] drm/msm/dp: remove ST_DISPLAY_OFF as a hpd_state Jessica Zhang
2025-07-12  0:58 ` [PATCH 12/19] drm/msm/dp: Drop ST_MAINLINK_READY hpd_state Jessica Zhang
2025-07-12  0:58 ` [PATCH 13/19] drm/msm/dp: Drop ST_DISCONNECTED Jessica Zhang
2025-07-12  0:58 ` [PATCH 14/19] drm/msm/dp: Drop ST_CONNECTED Jessica Zhang
2025-07-12  0:58 ` [PATCH 15/19] drm/msm/dp: Drop ST_DISCONNECT_PENDING Jessica Zhang
2025-07-12  0:58 ` [PATCH 16/19] drm/msm/dp: Drop hpd_state from msm_dp Jessica Zhang
2025-07-12  0:58 ` [PATCH 17/19] drm/msm/dp: Use drm_bridge_hpd_notify() Jessica Zhang
2025-07-14 12:25   ` Dmitry Baryshkov
2025-07-12  0:58 ` [PATCH 18/19] drm/msm/dp: Move link training to atomic_enable() Jessica Zhang
2025-07-14 11:54   ` Dmitry Baryshkov
2025-08-01 23:58     ` Jessica Zhang
2025-08-02 10:18       ` Dmitry Baryshkov
2025-07-12  0:58 ` [PATCH 19/19] drm/msm/dp: Log connected and link_ready for event handling Jessica Zhang

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