Messages in this thread | | | Date | Fri, 11 Aug 2023 20:05:58 +0300 | Subject | Re: [PATCH 05/11] drm/bridge: tc358768: Print logical values, not raw register values | From | Tomi Valkeinen <> |
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On 11/08/2023 19:31, Péter Ujfalusi wrote: > > > On 04/08/2023 13:44, Tomi Valkeinen wrote: >> 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. > > I'm a bit confused by the term 'logical' value, I think you meant > decimal, easier to read by humans numbers.
Not just decimal. Previously the code printed the register values, which e.g. could contain two values ORed together. So, with "logical" I just meant the "real" value, instead of "register-encoded".
>> 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. > > But, yes, decimal is better for the dmesg, as I recall I had a tool > which was using hex numbers so it was better to have the prints also in hex. > > Reviewed-by: Peter Ujfalusi <peter.ujfalusi@gmail.com> > >> >> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.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] */ >> >
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