linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Tony Lindgren <tony@atomide.com>
To: linux-omap@vger.kernel.org
Cc: "Andrew F . Davis" <afd@ti.com>, Dave Gerlach <d-gerlach@ti.com>,
	Faiz Abbas <faiz_abbas@ti.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Grygorii Strashko <grygorii.strashko@ti.com>,
	Keerthy <j-keerthy@ti.com>, Nishanth Menon <nm@ti.com>,
	Peter Ujfalusi <peter.ujfalusi@ti.com>,
	Roger Quadros <rogerq@ti.com>, Suman Anna <s-anna@ti.com>,
	Tero Kristo <t-kristo@ti.com>,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	Tomi Valkeinen <tomi.valkeinen@ti.com>,
	dri-devel@lists.freedesktop.org
Subject: [PATCH 3/5] bus: ti-sysc: Ignore clockactivity unless specified as a quirk
Date: Sun, 31 May 2020 12:39:39 -0700	[thread overview]
Message-ID: <20200531193941.13179-4-tony@atomide.com> (raw)
In-Reply-To: <20200531193941.13179-1-tony@atomide.com>

We must ignore the clockactivity bit for most modules and not set it
unless specified for the module with SYSC_QUIRK_USE_CLOCKACT. Otherwise
the interface clock can be automatically gated constantly causing
unexpected performance issues.

Fixes: ae9ae12e9daa ("bus: ti-sysc: Handle clockactivity for enable and disable")
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
 drivers/bus/ti-sysc.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -989,10 +989,13 @@ static int sysc_enable_module(struct device *dev)
 	regbits = ddata->cap->regbits;
 	reg = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]);
 
-	/* Set CLOCKACTIVITY, we only use it for ick */
+	/*
+	 * Set CLOCKACTIVITY, we only use it for ick. And we only configure it
+	 * based on the SYSC_QUIRK_USE_CLOCKACT flag, not based on the hardware
+	 * capabilities. See the old HWMOD_SET_DEFAULT_CLOCKACT flag.
+	 */
 	if (regbits->clkact_shift >= 0 &&
-	    (ddata->cfg.quirks & SYSC_QUIRK_USE_CLOCKACT ||
-	     ddata->cfg.sysc_val & BIT(regbits->clkact_shift)))
+	    (ddata->cfg.quirks & SYSC_QUIRK_USE_CLOCKACT))
 		reg |= SYSC_CLOCACT_ICK << regbits->clkact_shift;
 
 	/* Set SIDLE mode */
-- 
2.26.2

  parent reply	other threads:[~2020-05-31 19:40 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-31 19:39 [PATCH 0/5] Suspend and resume fixes for omapdrm pdata removal Tony Lindgren
2020-05-31 19:39 ` [PATCH 1/5] drm/omap: Fix suspend resume regression after platform data removal Tony Lindgren
2020-06-03 12:33   ` Tomi Valkeinen
2020-06-03 14:06     ` Tony Lindgren
2020-06-09  7:04       ` Tomi Valkeinen
2020-06-09 15:19         ` Tony Lindgren
2020-06-09 15:26           ` Tomi Valkeinen
2020-06-09 16:52             ` Tony Lindgren
2020-06-09 17:10               ` Tony Lindgren
2020-06-09 17:26                 ` Tony Lindgren
2020-06-10 11:47                 ` Tomi Valkeinen
2020-06-10 22:41                   ` Tony Lindgren
2020-06-11 14:00             ` Grygorii Strashko
2020-06-11 14:32               ` Tony Lindgren
2020-06-16 13:01               ` Tomi Valkeinen
2020-06-16 15:30                 ` Tony Lindgren
2020-06-16 16:56                   ` Grygorii Strashko
2020-06-17  6:04                     ` Tomi Valkeinen
2020-06-17 12:49                       ` Grygorii Strashko
2020-05-31 19:39 ` [PATCH 2/5] bus: ti-sysc: Use optional clocks on for enable and wait for softreset bit Tony Lindgren
2020-05-31 19:39 ` Tony Lindgren [this message]
2020-05-31 19:39 ` [PATCH 4/5] bus: ti-sysc: Fix uninitialized framedonetv_irq Tony Lindgren
2020-05-31 19:39 ` [PATCH 5/5] ARM: OMAP2+: Fix legacy mode dss_reset Tony Lindgren

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200531193941.13179-4-tony@atomide.com \
    --to=tony@atomide.com \
    --cc=afd@ti.com \
    --cc=d-gerlach@ti.com \
    --cc=dri-devel@lists.freedesktop.org \
    --cc=faiz_abbas@ti.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=grygorii.strashko@ti.com \
    --cc=j-keerthy@ti.com \
    --cc=laurent.pinchart@ideasonboard.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-omap@vger.kernel.org \
    --cc=nm@ti.com \
    --cc=peter.ujfalusi@ti.com \
    --cc=rogerq@ti.com \
    --cc=s-anna@ti.com \
    --cc=t-kristo@ti.com \
    --cc=tomi.valkeinen@ti.com \
    --subject='Re: [PATCH 3/5] bus: ti-sysc: Ignore clockactivity unless specified as a quirk' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
on how to clone and mirror all data and code used for this inbox