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From: Aradhya Bhatia <aradhya.bhatia@linux.dev>
To: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>,
	Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
	Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	Andrzej Hajda <andrzej.hajda@intel.com>,
	Neil Armstrong <neil.armstrong@linaro.org>,
	Robert Foss <rfoss@kernel.org>, Jonas Karlman <jonas@kwiboo.se>,
	Jernej Skrabec <jernej.skrabec@gmail.com>,
	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Maxime Ripard <mripard@kernel.org>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	David Airlie <airlied@gmail.com>, Simona Vetter <simona@ffwll.ch>
Cc: Nishanth Menon <nm@ti.com>, Vignesh Raghavendra <vigneshr@ti.com>,
	Devarsh Thakkar <devarsht@ti.com>,
	Praneeth Bajjuri <praneeth@ti.com>, Udit Kumar <u-kumar1@ti.com>,
	Jayesh Choudhary <j-choudhary@ti.com>,
	DRI Development List <dri-devel@lists.freedesktop.org>,
	Linux Kernel List <linux-kernel@vger.kernel.org>,
	Aradhya Bhatia <aradhya.bhatia@linux.dev>
Subject: [PATCH v7 04/12] drm/bridge: cdns-dsi: Fix the link and phy init order
Date: Tue, 14 Jan 2025 11:26:18 +0530	[thread overview]
Message-ID: <20250114055626.18816-5-aradhya.bhatia@linux.dev> (raw)
In-Reply-To: <20250114055626.18816-1-aradhya.bhatia@linux.dev>

From: Aradhya Bhatia <a-bhatia1@ti.com>

The order of init of DSI link and DSI phy is wrong. The DSI link needs
to be configured before the DSI phy is getting configured. Otherwise,
the D-Phy is unable to lock in on the incoming PLL Reference clock[0].

Fix the order of inits.

[0]: See section 12.6.5.7.3 "Start-up Procedure" in J721E SoC TRM
     TRM Link: http://www.ti.com/lit/pdf/spruil1

Fixes: fced5a364dee ("drm/bridge: cdns: Convert to phy framework")
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Aradhya Bhatia <a-bhatia1@ti.com>
Signed-off-by: Aradhya Bhatia <aradhya.bhatia@linux.dev>
---
 drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c b/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c
index 039c5eb7fb66..89e8d6f1c4dd 100644
--- a/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c
+++ b/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c
@@ -780,8 +780,8 @@ static void cdns_dsi_bridge_enable(struct drm_bridge *bridge)
 
 	WARN_ON_ONCE(cdns_dsi_check_conf(dsi, mode, &dsi_cfg, false));
 
-	cdns_dsi_hs_init(dsi);
 	cdns_dsi_init_link(dsi);
+	cdns_dsi_hs_init(dsi);
 
 	writel(HBP_LEN(dsi_cfg.hbp) | HSA_LEN(dsi_cfg.hsa),
 	       dsi->regs + VID_HSIZE1);
-- 
2.34.1


  parent reply	other threads:[~2025-01-14  5:57 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-01-14  5:56 [PATCH v7 00/12] drm/bridge: cdns-dsi: Fix the color-shift issue Aradhya Bhatia
2025-01-14  5:56 ` [PATCH v7 01/12] drm/bridge: cdns-dsi: Fix connecting to next bridge Aradhya Bhatia
2025-01-14  5:56 ` [PATCH v7 02/12] drm/bridge: cdns-dsi: Move to devm_drm_of_get_bridge() Aradhya Bhatia
2025-01-14  5:56 ` [PATCH v7 03/12] drm/bridge: cdns-dsi: Fix phy de-init and flag it so Aradhya Bhatia
2025-01-14 12:30   ` Tomi Valkeinen
2025-01-14 14:44     ` Aradhya Bhatia
2025-01-14 15:20       ` Tomi Valkeinen
2025-01-14 16:32         ` Aradhya Bhatia
2025-01-15  8:17           ` Tomi Valkeinen
2025-01-17 13:12             ` Aradhya Bhatia
2025-01-14  5:56 ` Aradhya Bhatia [this message]
2025-01-14  5:56 ` [PATCH v7 05/12] drm/bridge: cdns-dsi: Fix the clock variable for mode_valid() Aradhya Bhatia
2025-01-14 11:13   ` Dmitry Baryshkov
2025-01-14  5:56 ` [PATCH v7 06/12] drm/bridge: cdns-dsi: Check return value when getting default PHY config Aradhya Bhatia
2025-01-14  5:56 ` [PATCH v7 07/12] drm/bridge: cdns-dsi: Wait for Clk and Data Lanes to be ready Aradhya Bhatia
2025-01-14  5:56 ` [PATCH v7 08/12] drm/mipi-dsi: Add helper to find input format Aradhya Bhatia
2025-01-14  5:56 ` [PATCH v7 09/12] drm/bridge: cdns-dsi: Support atomic bridge APIs Aradhya Bhatia
2025-01-14  5:56 ` [PATCH v7 10/12] drm/bridge: cdns-dsi: Move DSI mode check to _atomic_check() Aradhya Bhatia
2025-01-14 11:15   ` Dmitry Baryshkov
2025-01-14 12:47   ` Tomi Valkeinen
2025-01-14  5:56 ` [PATCH v7 11/12] drm/atomic-helper: Re-order bridge chain pre-enable and post-disable Aradhya Bhatia
2025-01-14 11:24   ` Dmitry Baryshkov
2025-01-14 13:04     ` Tomi Valkeinen
2025-01-14 16:35       ` Aradhya Bhatia
2025-01-14 16:43         ` Maxime Ripard
2025-01-14 16:52           ` Aradhya Bhatia
2025-01-17 13:07     ` Aradhya Bhatia
2025-01-20  8:38       ` Dmitry Baryshkov
2025-01-20 17:48         ` Aradhya Bhatia
2025-01-21 10:50           ` Dmitry Baryshkov
2025-01-21 17:42             ` Aradhya Bhatia
2025-01-14  5:56 ` [PATCH v7 12/12] drm/bridge: cdns-dsi: Use pre_enable/post_disable to enable/disable Aradhya Bhatia

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