From: Robert Foss <rfoss@kernel.org>
To: Lucas Stach <l.stach@pengutronix.de>
Cc: "Heiko Stübner" <heiko@sntech.de>,
"Andy Yan" <andy.yan@rock-chips.com>,
"Sandy Huang" <hjc@rock-chips.com>,
"Jingoo Han" <jingoohan1@gmail.com>,
"Inki Dae" <inki.dae@samsung.com>,
"Seung-Woo Kim" <sw0312.kim@samsung.com>,
"Kyungmin Park" <kyungmin.park@samsung.com>,
"Andrzej Hajda" <andrzej.hajda@intel.com>,
"Neil Armstrong" <neil.armstrong@linaro.org>,
"Laurent Pinchart" <Laurent.pinchart@ideasonboard.com>,
"Jonas Karlman" <jonas@kwiboo.se>,
"Jernej Skrabec" <jernej.skrabec@gmail.com>,
linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org,
linux-rockchip@lists.infradead.org,
dri-devel@lists.freedesktop.org, kernel@pengutronix.de,
patchwork-lst@pengutronix.de
Subject: Re: [PATCH 09/14] drm/bridge: analogix_dp: remove PLL lock check from analogix_dp_config_video
Date: Tue, 7 May 2024 15:06:53 +0200 [thread overview]
Message-ID: <CAN6tsi6HJDg3dWF=FGJNoONths7GWQrUmDtbW=Z4fVzi2CegOQ@mail.gmail.com> (raw)
In-Reply-To: <20240503151129.3901815-10-l.stach@pengutronix.de>
On Fri, May 3, 2024 at 5:13 PM Lucas Stach <l.stach@pengutronix.de> wrote:
>
> This check is way too late in the DP enable flow. The PLL must be locked
> much earlier, before any link training can happen. If the PLL is unlocked
> at that point in time there is something seriously wrong in the enable flow.
>
> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
> ---
> drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 5 -----
> 1 file changed, 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> index fdb2c2a2b69a..b4a47311cfe8 100644
> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> @@ -720,11 +720,6 @@ static int analogix_dp_config_video(struct analogix_dp_device *dp)
>
> analogix_dp_set_video_color_format(dp);
>
> - if (analogix_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) {
> - dev_err(dp->dev, "PLL is not locked yet.\n");
> - return -EINVAL;
> - }
> -
> for (;;) {
> timeout_loop++;
> if (analogix_dp_is_slave_video_stream_clock_on(dp) == 0)
> --
> 2.39.2
>
Reviewed-by: Robet Foss <rfoss@kernel.org>
next prev parent reply other threads:[~2024-05-07 13:07 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-03 15:11 [PATCH 00/14] improve Analogix DP AUX channel handling Lucas Stach
2024-05-03 15:11 ` [PATCH 01/14] drm/bridge: analogix_dp: remove unused platform power_on_end callback Lucas Stach
2024-05-07 12:02 ` Robert Foss
2024-05-03 15:11 ` [PATCH 02/14] drm/rockchip: analogix_dp: add runtime PM handling Lucas Stach
2024-05-07 12:15 ` Robert Foss
2024-06-10 12:45 ` Heiko Stübner
2024-05-03 15:11 ` [PATCH 03/14] drm/bridge: analogix_dp: register AUX bus after enabling runtime PM Lucas Stach
2024-05-07 12:49 ` Robert Foss
2024-05-03 15:11 ` [PATCH 04/14] drm/bridge: analogix_dp: handle clock via " Lucas Stach
2024-05-07 12:57 ` Robert Foss
2024-05-03 15:11 ` [PATCH 05/14] drm/bridge: analogix_dp: remove unused analogix_dp_remove Lucas Stach
2024-05-07 12:58 ` Robert Foss
2024-05-03 15:11 ` [PATCH 06/14] drm/bridge: analogix_dp: remove clk handling from analogix_dp_set_bridge Lucas Stach
2024-05-07 13:00 ` Robert Foss
2024-05-03 15:11 ` [PATCH 07/14] drm/bridge: analogix_dp: move platform and PHY power handling into runtime PM Lucas Stach
2024-05-07 13:01 ` Robert Foss
2024-05-03 15:11 ` [PATCH 08/14] drm/bridge: analogix_dp: move basic controller init " Lucas Stach
2024-05-07 13:05 ` Robert Foss
2024-05-03 15:11 ` [PATCH 09/14] drm/bridge: analogix_dp: remove PLL lock check from analogix_dp_config_video Lucas Stach
2024-05-07 13:06 ` Robert Foss [this message]
2024-05-03 15:11 ` [PATCH 10/14] drm/bridge: analogix_dp: move macro reset after link bandwidth setting Lucas Stach
2024-05-07 13:07 ` Robert Foss
2024-06-10 11:45 ` Robert Foss
2024-05-03 15:11 ` [PATCH 11/14] drm/bridge: analogix_dp: don't wait for PLL lock too early Lucas Stach
2024-06-10 11:48 ` Robert Foss
2024-05-03 15:11 ` [PATCH 12/14] drm/bridge: analogix_dp: simplify and correct PLL lock checks Lucas Stach
2024-06-10 11:55 ` Robert Foss
2024-05-03 15:11 ` [PATCH 13/14] drm/bridge: analogix_dp: only read AUX status when an error occured Lucas Stach
2024-06-10 11:56 ` Robert Foss
2024-05-03 15:11 ` [PATCH 14/14] drm/bridge: analogix_dp: handle AUX transfer timeouts Lucas Stach
2024-06-10 11:57 ` Robert Foss
2024-05-07 13:10 ` [PATCH 00/14] improve Analogix DP AUX channel handling Robert Foss
2024-05-15 10:31 ` Lucas Stach
2024-06-10 12:47 ` Heiko Stübner
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