linux-kernel - [PATCH v2 06/12] drm/bridge: tc358768: Print logical values, not raw register values

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Message-Id: <20230816-tc358768-v2-6-242b9d5f703a@ideasonboard.com>
Date:   Wed, 16 Aug 2023 14:25:09 +0300
From:   Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
To:     Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Robert Foss <rfoss@...nel.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Péter Ujfalusi <peter.ujfalusi@...il.com>,
        Maxim Schwalm <maxim.schwalm@...il.com>,
        Francesco Dolcini <francesco@...cini.it>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Aradhya Bhatia <a-bhatia1@...com>,
        Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Subject: [PATCH v2 06/12] drm/bridge: tc358768: Print logical values, not
 raw register values

The driver debug prints DSI related timings as raw register values in
hex. It is much more useful to see the "logical" value of the timing,
not the register value.

Change the prints to print the values separately, in case a single
register contains multiple values, and use %u to have it in a more human
consumable form.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
---
 drivers/gpu/drm/bridge/tc358768.c | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/bridge/tc358768.c b/drivers/gpu/drm/bridge/tc358768.c
index 9b633038af33..0ef51d04bb21 100644
--- a/drivers/gpu/drm/bridge/tc358768.c
+++ b/drivers/gpu/drm/bridge/tc358768.c
@@ -739,57 +739,59 @@ static void tc358768_bridge_pre_enable(struct drm_bridge *bridge)
 
 	/* LP11 > 100us for D-PHY Rx Init */
 	val = tc358768_ns_to_cnt(100 * 1000, dsibclk_nsk) - 1;
-	dev_dbg(priv->dev, "LINEINITCNT: 0x%x\n", val);
+	dev_dbg(priv->dev, "LINEINITCNT: %u\n", val);
 	tc358768_write(priv, TC358768_LINEINITCNT, val);
 
 	/* LPTimeCnt > 50ns */
 	val = tc358768_ns_to_cnt(50, dsibclk_nsk) - 1;
 	lptxcnt = val;
-	dev_dbg(priv->dev, "LPTXTIMECNT: 0x%x\n", val);
+	dev_dbg(priv->dev, "LPTXTIMECNT: %u\n", val);
 	tc358768_write(priv, TC358768_LPTXTIMECNT, val);
 
 	/* 38ns < TCLK_PREPARE < 95ns */
 	val = tc358768_ns_to_cnt(65, dsibclk_nsk) - 1;
+	dev_dbg(priv->dev, "TCLK_PREPARECNT %u\n", val);
 	/* TCLK_PREPARE + TCLK_ZERO > 300ns */
 	val2 = tc358768_ns_to_cnt(300 - tc358768_to_ns(2 * ui_nsk),
 				  dsibclk_nsk) - 2;
+	dev_dbg(priv->dev, "TCLK_ZEROCNT %u\n", val2);
 	val |= val2 << 8;
-	dev_dbg(priv->dev, "TCLK_HEADERCNT: 0x%x\n", val);
 	tc358768_write(priv, TC358768_TCLK_HEADERCNT, val);
 
 	/* TCLK_TRAIL > 60ns AND TEOT <= 105 ns + 12*UI */
 	raw_val = tc358768_ns_to_cnt(60 + tc358768_to_ns(2 * ui_nsk), dsibclk_nsk) - 5;
 	val = clamp(raw_val, 0, 127);
-	dev_dbg(priv->dev, "TCLK_TRAILCNT: 0x%x\n", val);
+	dev_dbg(priv->dev, "TCLK_TRAILCNT: %u\n", val);
 	tc358768_write(priv, TC358768_TCLK_TRAILCNT, val);
 
 	/* 40ns + 4*UI < THS_PREPARE < 85ns + 6*UI */
 	val = 50 + tc358768_to_ns(4 * ui_nsk);
 	val = tc358768_ns_to_cnt(val, dsibclk_nsk) - 1;
+	dev_dbg(priv->dev, "THS_PREPARECNT %u\n", val);
 	/* THS_PREPARE + THS_ZERO > 145ns + 10*UI */
 	raw_val = tc358768_ns_to_cnt(145 - tc358768_to_ns(3 * ui_nsk), dsibclk_nsk) - 10;
 	val2 = clamp(raw_val, 0, 127);
+	dev_dbg(priv->dev, "THS_ZEROCNT %u\n", val2);
 	val |= val2 << 8;
-	dev_dbg(priv->dev, "THS_HEADERCNT: 0x%x\n", val);
 	tc358768_write(priv, TC358768_THS_HEADERCNT, val);
 
 	/* TWAKEUP > 1ms in lptxcnt steps */
 	val = tc358768_ns_to_cnt(1020000, dsibclk_nsk);
 	val = val / (lptxcnt + 1) - 1;
-	dev_dbg(priv->dev, "TWAKEUP: 0x%x\n", val);
+	dev_dbg(priv->dev, "TWAKEUP: %u\n", val);
 	tc358768_write(priv, TC358768_TWAKEUP, val);
 
 	/* TCLK_POSTCNT > 60ns + 52*UI */
 	val = tc358768_ns_to_cnt(60 + tc358768_to_ns(52 * ui_nsk),
 				 dsibclk_nsk) - 3;
-	dev_dbg(priv->dev, "TCLK_POSTCNT: 0x%x\n", val);
+	dev_dbg(priv->dev, "TCLK_POSTCNT: %u\n", val);
 	tc358768_write(priv, TC358768_TCLK_POSTCNT, val);
 
 	/* max(60ns + 4*UI, 8*UI) < THS_TRAILCNT < 105ns + 12*UI */
 	raw_val = tc358768_ns_to_cnt(60 + tc358768_to_ns(18 * ui_nsk),
 				     dsibclk_nsk) - 4;
 	val = clamp(raw_val, 0, 15);
-	dev_dbg(priv->dev, "THS_TRAILCNT: 0x%x\n", val);
+	dev_dbg(priv->dev, "THS_TRAILCNT: %u\n", val);
 	tc358768_write(priv, TC358768_THS_TRAILCNT, val);
 
 	val = BIT(0);
@@ -803,10 +805,11 @@ static void tc358768_bridge_pre_enable(struct drm_bridge *bridge)
 	/* TXTAGOCNT[26:16] RXTASURECNT[10:0] */
 	val = tc358768_to_ns((lptxcnt + 1) * dsibclk_nsk * 4);
 	val = tc358768_ns_to_cnt(val, dsibclk_nsk) / 4 - 1;
+	dev_dbg(priv->dev, "TXTAGOCNT: %u\n", val);
 	val2 = tc358768_ns_to_cnt(tc358768_to_ns((lptxcnt + 1) * dsibclk_nsk),
 				  dsibclk_nsk) - 2;
+	dev_dbg(priv->dev, "RXTASURECNT: %u\n", val2);
 	val = val << 16 | val2;
-	dev_dbg(priv->dev, "BTACNTRL1: 0x%x\n", val);
 	tc358768_write(priv, TC358768_BTACNTRL1, val);
 
 	/* START[0] */

-- 
2.34.1