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From: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
To: Marek Vasut <marex@denx.de>,
	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>,
	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: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
	Dave Stevenson <dave.stevenson@raspberrypi.com>,
	Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Subject: [PATCH v3 04/13] drm/bridge: tc358762: Configure SYSCTRL first
Date: Wed, 13 May 2026 16:10:13 +0300	[thread overview]
Message-ID: <20260513-tc358762-fixes-v3-4-6698b55008b9@ideasonboard.com> (raw)
In-Reply-To: <20260513-tc358762-fixes-v3-0-6698b55008b9@ideasonboard.com>

SYSCTRL affects the DPI output and the clock tree, but we configure it
late, when the DPI output is already enabled and clocks are running.

Move the SYSCTRL configuration to the beginning, before anything is
enabled.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
---
 drivers/gpu/drm/bridge/tc358762.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/bridge/tc358762.c b/drivers/gpu/drm/bridge/tc358762.c
index 669052074974..d119e399f7a2 100644
--- a/drivers/gpu/drm/bridge/tc358762.c
+++ b/drivers/gpu/drm/bridge/tc358762.c
@@ -135,6 +135,13 @@ static int tc358762_init(struct tc358762 *ctx)
 {
 	u32 lcdctrl;
 
+	tc358762_write(ctx, SYSCTRL,
+		       FIELD_PREP(SYSCTRL_DPIDATA_IO_MASK, SYSCTRL_DPIDATA_IO_4MA) |
+		       FIELD_PREP(SYSCTRL_DPISTB_IO_MASK, SYSCTRL_DPISTB_IO_4MA) |
+		       FIELD_PREP(SYSCTRL_PCLKDIV_MASK, SYSCTRL_PCLKDIV_DIV_3));
+
+	msleep(100);
+
 	tc358762_write(ctx, DSI_LANEENABLE,
 		       DSI_LANEENABLE_L0EN | DSI_LANEENABLE_CLEN);
 	tc358762_write(ctx, PPI_D0S_CLRSIPOCOUNT, 5);
@@ -158,13 +165,6 @@ static int tc358762_init(struct tc358762 *ctx)
 
 	tc358762_write(ctx, LCDCTRL, lcdctrl);
 
-	tc358762_write(ctx, SYSCTRL,
-		       FIELD_PREP(SYSCTRL_DPIDATA_IO_MASK, SYSCTRL_DPIDATA_IO_4MA) |
-		       FIELD_PREP(SYSCTRL_DPISTB_IO_MASK, SYSCTRL_DPISTB_IO_4MA) |
-		       FIELD_PREP(SYSCTRL_PCLKDIV_MASK, SYSCTRL_PCLKDIV_DIV_3));
-
-	msleep(100);
-
 	tc358762_write(ctx, PPI_STARTPPI, PPI_STARTPPI_STARTPPI);
 	tc358762_write(ctx, DSI_STARTDSI, DSI_STARTDSI_STARTDSI);
 

-- 
2.43.0


  parent reply	other threads:[~2026-05-13 13:10 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-05-13 13:10 [PATCH v3 00/13] drm/bridge: tc358762: Various small fixes Tomi Valkeinen
2026-05-13 13:10 ` [PATCH v3 01/13] drm/bridge: tc358762: Clean up register defines Tomi Valkeinen
2026-05-16  2:04   ` Claude review: " Claude Code Review Bot
2026-05-13 13:10 ` [PATCH v3 02/13] drm/bridge: tc358762: Improve SYSCTRL " Tomi Valkeinen
2026-05-16  2:04   ` Claude review: " Claude Code Review Bot
2026-05-13 13:10 ` [PATCH v3 03/13] drm/bridge: tc358762: Improve LCDCTRL defines Tomi Valkeinen
2026-05-16  2:04   ` Claude review: " Claude Code Review Bot
2026-05-13 13:10 ` Tomi Valkeinen [this message]
2026-05-16  2:04   ` Claude review: drm/bridge: tc358762: Configure SYSCTRL first Claude Code Review Bot
2026-05-13 13:10 ` [PATCH v3 05/13] drm/bridge: tc358762: Drop SPICMR write Tomi Valkeinen
2026-05-16  2:04   ` Claude review: " Claude Code Review Bot
2026-05-13 13:10 ` [PATCH v3 06/13] drm/bridge: tc358762: Improve DPI enable handling Tomi Valkeinen
2026-05-16  2:04   ` Claude review: " Claude Code Review Bot
2026-05-13 13:10 ` [PATCH v3 07/13] drm/bridge: tc358762: Update comment about the number of lanes Tomi Valkeinen
2026-05-16  2:04   ` Claude review: " Claude Code Review Bot
2026-05-13 13:10 ` [PATCH v3 08/13] drm/bridge: tc358762: Support VTG Tomi Valkeinen
2026-05-16  2:04   ` Claude review: " Claude Code Review Bot
2026-05-13 13:10 ` [PATCH v3 09/13] drm/bridge: tc358762: Fix sync polarities Tomi Valkeinen
2026-05-16  2:04   ` Claude review: " Claude Code Review Bot
2026-05-13 13:10 ` [PATCH v3 10/13] drm/bridge: tc358762: Move tc358762_init() into tc358762_enable() Tomi Valkeinen
2026-05-16  2:04   ` Claude review: " Claude Code Review Bot
2026-05-13 13:10 ` [PATCH v3 11/13] drm/bridge: tc358762: Drop drm_bridge_funcs.mode_set Tomi Valkeinen
2026-05-16  2:04   ` Claude review: " Claude Code Review Bot
2026-05-13 13:10 ` [PATCH v3 12/13] drm/bridge: tc358762: Set DE_POL and DCLK_POL properly Tomi Valkeinen
2026-05-16  2:04   ` Claude review: " Claude Code Review Bot
2026-05-13 13:10 ` [PATCH v3 13/13] drm/panel-simple: Fix powertip,ph800480t013-idf02 timings Tomi Valkeinen
2026-05-16  2:04   ` Claude review: " Claude Code Review Bot
2026-05-16  2:04 ` Claude review: drm/bridge: tc358762: Various small fixes Claude Code Review Bot

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