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From:   Pin-yen Lin <treapking@chromium.org>
To:     Douglas Anderson <dianders@chromium.org>,
        Andrzej Hajda <andrzej.hajda@intel.com>,
        Neil Armstrong <neil.armstrong@linaro.org>,
        Robert Foss <rfoss@kernel.org>,
        Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
        Jonas Karlman <jonas@kwiboo.se>,
        Jernej Skrabec <jernej.skrabec@gmail.com>
Cc:     dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
        Daniel Vetter <daniel@ffwll.ch>,
        David Airlie <airlied@gmail.com>,
        Pin-yen Lin <treapking@chromium.org>
Subject: [PATCH] drm/bridge: ps8640: Use constant sleep time for polling hpd
Date:   Fri, 31 Mar 2023 11:02:04 +0800
Message-Id: <20230331030204.1179524-1-treapking@chromium.org>
MIME-Version: 1.0
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Precedence: bulk

The default hpd_wait_us in panel_edp.c is 2 seconds. This makes the
sleep time in the polling of _ps8640_wait_hpd_asserted become 200ms.
Change it to a constant 20ms to speed up the function.

Signed-off-by: Pin-yen Lin <treapking@chromium.org>
---

 drivers/gpu/drm/bridge/parade-ps8640.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c
index b823e55650b1..c3eb45179405 100644
--- a/drivers/gpu/drm/bridge/parade-ps8640.c
+++ b/drivers/gpu/drm/bridge/parade-ps8640.c
@@ -184,7 +184,7 @@ static int _ps8640_wait_hpd_asserted(struct ps8640 *ps_bridge, unsigned long wai
 	 * actually connected to GPIO9).
 	 */
 	ret = regmap_read_poll_timeout(map, PAGE2_GPIO_H, status,
-				       status & PS_GPIO9, wait_us / 10, wait_us);
+				       status & PS_GPIO9, 20000, wait_us);
 
 	/*
 	 * The first time we see HPD go high after a reset we delay an extra
-- 
2.40.0.348.gf938b09366-goog