From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7437ABA49 for ; Tue, 7 Mar 2023 18:52:23 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C4ADEC433EF; Tue, 7 Mar 2023 18:52:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678215143; bh=vdIuM0E6QKL+iwCuTYTEPoD61H/n1eSG8Yh9OwLELjA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YTnjP2IRp+f1hV3jj86ry9cRi+Luk18ITZzbWrnUei9nR0vcYZxnMNfMWKhuiOPpF dsskcTCxj6fP3TRyge0TdLk35h24Py4D6LIJIYteNqJpCUeKh9Pz/4JvRQlJOAwahd wQ2klG3zWTcSrGK2ig9RKQWxlFBAH9rH82b6kFRQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Frieder Schrempf , Alexander Stein , Robert Foss , Sasha Levin Subject: [PATCH 5.15 166/567] drm/bridge: ti-sn65dsi83: Fix delay after reset deassert to match spec Date: Tue, 7 Mar 2023 17:58:22 +0100 Message-Id: <20230307165913.138672515@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230307165905.838066027@linuxfoundation.org> References: <20230307165905.838066027@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Frieder Schrempf [ Upstream commit 4b03d5e0d3e86ee492d54254927d020dc0fe8acf ] The datasheet specifies a delay of 10 milliseconds, but the current driver only waits for 1 ms. Fix this to make sure the initialization sequence meets the spec. Fixes: ceb515ba29ba ("drm/bridge: ti-sn65dsi83: Add TI SN65DSI83 and SN65DSI84 driver") Signed-off-by: Frieder Schrempf Reviewed-by: Alexander Stein Signed-off-by: Robert Foss Link: https://patchwork.freedesktop.org/patch/msgid/20221122081219.20143-1-frieder@fris.de Signed-off-by: Sasha Levin --- drivers/gpu/drm/bridge/ti-sn65dsi83.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi83.c b/drivers/gpu/drm/bridge/ti-sn65dsi83.c index c901c0e1a3b04..b3cb910b30852 100644 --- a/drivers/gpu/drm/bridge/ti-sn65dsi83.c +++ b/drivers/gpu/drm/bridge/ti-sn65dsi83.c @@ -381,6 +381,8 @@ static void sn65dsi83_atomic_enable(struct drm_bridge *bridge, u16 val; int ret; + usleep_range(10000, 11000); + /* Get the LVDS format from the bridge state. */ bridge_state = drm_atomic_get_new_bridge_state(state, bridge); -- 2.39.2