From: Andreas Kemnade <andreas@kemnade.info>
To: t-kristo@ti.com, mturquette@baylibre.com, sboyd@kernel.org,
linux-omap@vger.kernel.org, linux-clk@vger.kernel.org,
linux-kernel@vger.kernel.org, bcousson@baylibre.com,
paul@pwsan.com, tony@atomide.com, letux-kernel@openphoenux.org
Cc: Andreas Kemnade <andreas@kemnade.info>
Subject: [PATCH v3 3/3] arm: omap_hwmod disable ick autoidling when a hwmod requires that
Date: Wed, 16 Jan 2019 23:04:29 +0100 [thread overview]
Message-ID: <20190116220429.9136-4-andreas@kemnade.info> (raw)
In-Reply-To: <20190116220429.9136-1-andreas@kemnade.info>
Deny autoidle for hwmods with the OCPIF_SWSUP_IDLE flag,
that makes hwmods working properly which cannot handle
autoidle properly in lower power states.
Affected is e. g. the omap_hdq.
Since an ick might have mulitple users, autoidle is disabled
when an individual user requires that rather than in
_setup_iclk_autoidle. dss_ick is an example for that.
Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
---
Comments to v1 to this patch were worked into a new 2/3
---
arch/arm/mach-omap2/omap_hwmod.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index b5531dd3ae9c..3a04c73ac03c 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -1002,8 +1002,10 @@ static int _enable_clocks(struct omap_hwmod *oh)
clk_enable(oh->_clk);
list_for_each_entry(os, &oh->slave_ports, node) {
- if (os->_clk && (os->flags & OCPIF_SWSUP_IDLE))
+ if (os->_clk && (os->flags & OCPIF_SWSUP_IDLE)) {
+ omap2_clk_deny_idle(os->_clk);
clk_enable(os->_clk);
+ }
}
/* The opt clocks are controlled by the device driver. */
@@ -1055,8 +1057,10 @@ static int _disable_clocks(struct omap_hwmod *oh)
clk_disable(oh->_clk);
list_for_each_entry(os, &oh->slave_ports, node) {
- if (os->_clk && (os->flags & OCPIF_SWSUP_IDLE))
+ if (os->_clk && (os->flags & OCPIF_SWSUP_IDLE)) {
clk_disable(os->_clk);
+ omap2_clk_allow_idle(os->_clk);
+ }
}
if (oh->flags & HWMOD_OPT_CLKS_NEEDED)
@@ -2436,9 +2440,13 @@ static void _setup_iclk_autoidle(struct omap_hwmod *oh)
continue;
if (os->flags & OCPIF_SWSUP_IDLE) {
- /* XXX omap_iclk_deny_idle(c); */
+ /*
+ * we might have multiple users of one iclk with
+ * different requirements, disable autoidle when
+ * the module is enabled, e.g. dss iclk
+ */
} else {
- /* XXX omap_iclk_allow_idle(c); */
+ /* we are enabling autoidle afterwards anyways */
clk_enable(os->_clk);
}
}
--
2.11.0
next prev parent reply other threads:[~2019-01-16 22:04 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-16 22:04 [PATCH v3 0/3] mach-omap2: handle autoidle denial Andreas Kemnade
2019-01-16 22:04 ` [PATCH v3 1/3] clk: ti: add a usecount for autoidle Andreas Kemnade
2019-01-16 22:04 ` [PATCH v3 2/3] clk: ti: check clock type before doing autoidle ops Andreas Kemnade
2019-01-16 22:04 ` Andreas Kemnade [this message]
2019-01-18 15:48 ` [PATCH v3 3/3] arm: omap_hwmod disable ick autoidling when a hwmod requires that Tony Lindgren
2019-01-18 17:18 ` Andreas Kemnade
2019-01-18 18:36 ` Tony Lindgren
2019-01-18 19:38 ` Andreas Kemnade
2019-01-18 19:42 ` [Letux-kernel] " Andreas Kemnade
2019-01-18 19:48 ` Tony Lindgren
2019-01-19 6:39 ` J, KEERTHY
2019-01-19 7:12 ` Andreas Kemnade
2019-01-19 7:58 ` J, KEERTHY
2019-01-22 6:26 ` Keerthy
2019-01-18 19:45 ` Tony Lindgren
2019-01-21 7:12 ` Tero Kristo
2019-01-21 17:07 ` Tony Lindgren
2019-01-21 17:53 ` Andreas Kemnade
2019-01-21 19:56 ` Tony Lindgren
2019-01-21 19:58 ` [PATCH v3 0/3] mach-omap2: handle autoidle denial Tony Lindgren
2019-02-09 18:53 ` Andreas Kemnade
2019-02-15 19:19 ` Tero Kristo
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=20190116220429.9136-4-andreas@kemnade.info \
--to=andreas@kemnade.info \
--cc=bcousson@baylibre.com \
--cc=letux-kernel@openphoenux.org \
--cc=linux-clk@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-omap@vger.kernel.org \
--cc=mturquette@baylibre.com \
--cc=paul@pwsan.com \
--cc=sboyd@kernel.org \
--cc=t-kristo@ti.com \
--cc=tony@atomide.com \
/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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).