From: Maxime Ripard <maxime@cerno.tech>
To: Mike Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>,
linux-clk@vger.kernel.org
Cc: Alexander Stein <alexander.stein@ew.tq-group.com>,
Yassine Oudjana <y.oudjana@protonmail.com>,
Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
Naresh Kamboju <naresh.kamboju@linaro.org>,
Tony Lindgren <tony@atomide.com>,
Neil Armstrong <narmstrong@baylibre.com>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Jerome Brunet <jbrunet@baylibre.com>,
Maxime Ripard <maxime@cerno.tech>
Subject: [PATCH v7 27/28] clk: qcom: clk-rcg2: Take clock boundaries into consideration for gfx3d
Date: Fri, 15 Jul 2022 18:00:13 +0200 [thread overview]
Message-ID: <20220715160014.2623107-28-maxime@cerno.tech> (raw)
In-Reply-To: <20220715160014.2623107-1-maxime@cerno.tech>
The gfx3d clock is hand-crafting its own clk_rate_request in
clk_gfx3d_determine_rate to pass to the parent of that clock.
However, since the clk_rate_request is zero'd at creation, it will have
a max_rate of 0 which will break any code depending on the clock
boundaries.
That includes the recent commit 948fb0969eae ("clk: Always clamp the
rounded rate") which will clamp the rate given to clk_round_rate() to
the current clock boundaries.
For the gfx3d clock, it means that since both the min_rate and max_rate
fields are set at zero, clk_round_rate() now always return 0.
Let's initialize the min_rate and max_rate fields properly for that
clock.
Fixes: 948fb0969eae ("clk: Always clamp the rounded rate")
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
drivers/clk/qcom/clk-rcg2.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/clk/qcom/clk-rcg2.c b/drivers/clk/qcom/clk-rcg2.c
index 28019edd2a50..ee536b457952 100644
--- a/drivers/clk/qcom/clk-rcg2.c
+++ b/drivers/clk/qcom/clk-rcg2.c
@@ -908,6 +908,15 @@ static int clk_gfx3d_determine_rate(struct clk_hw *hw,
req->best_parent_hw = p2;
}
+ clk_hw_get_rate_range(req->best_parent_hw,
+ &parent_req.min_rate, &parent_req.max_rate);
+
+ if (req->min_rate > parent_req.min_rate)
+ parent_req.min_rate = req->min_rate;
+
+ if (req->max_rate < parent_req.max_rate)
+ parent_req.max_rate = req->max_rate;
+
ret = __clk_determine_rate(req->best_parent_hw, &parent_req);
if (ret)
return ret;
--
2.36.1
next prev parent reply other threads:[~2022-07-15 16:03 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-15 15:59 [PATCH v7 00/28] clk: More clock rate fixes and tests Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 01/28] clk: bcm: rpi: Create helper to retrieve private data Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 02/28] clk: bcm: rpi: Add a function to retrieve the maximum Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 03/28] drm/vc4: hdmi: Rework hdmi_enable_4kp60 detection Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 04/28] clk: test: Switch to clk_hw_get_clk Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 05/28] clk: Drop the rate range on clk_put() Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 06/28] clk: Skip clamping when rounding if there's no boundaries Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 07/28] clk: Mention that .recalc_rate can return 0 on error Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 08/28] clk: Clarify clk_get_rate() expectations Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 09/28] clk: tests: Add test suites description Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 10/28] clk: tests: Add reference to the orphan mux bug report Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 11/28] clk: tests: Add tests for uncached clock Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 12/28] clk: tests: Add tests for single parent mux Maxime Ripard
2022-07-15 15:59 ` [PATCH v7 13/28] clk: tests: Add tests for mux with multiple parents Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 14/28] clk: tests: Add some tests for orphan " Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 15/28] clk: Take into account uncached clocks in clk_set_rate_range() Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 16/28] clk: Set req_rate on reparenting Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 17/28] clk: Change clk_core_init_rate_req prototype Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 18/28] clk: Move clk_core_init_rate_req() from clk_core_round_rate_nolock() to its caller Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 19/28] clk: Introduce clk_hw_init_rate_request() Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 20/28] clk: Add our request boundaries in clk_core_init_rate_req Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 21/28] clk: Switch from __clk_determine_rate to clk_core_round_rate_nolock Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 22/28] clk: Introduce clk_core_has_parent() Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 23/28] clk: Constify clk_has_parent() Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 24/28] clk: Stop forwarding clk_rate_requests to the parent Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 25/28] clk: Zero the clk_rate_request structure Maxime Ripard
2022-07-15 16:00 ` [PATCH v7 26/28] clk: Introduce the clk_hw_get_rate_range function Maxime Ripard
2022-07-15 16:00 ` Maxime Ripard [this message]
2022-07-15 16:00 ` [PATCH v7 28/28] clk: tests: Add missing test case for ranges Maxime Ripard
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=20220715160014.2623107-28-maxime@cerno.tech \
--to=maxime@cerno.tech \
--cc=alexander.stein@ew.tq-group.com \
--cc=dmitry.baryshkov@linaro.org \
--cc=jbrunet@baylibre.com \
--cc=linux-clk@vger.kernel.org \
--cc=m.szyprowski@samsung.com \
--cc=mturquette@baylibre.com \
--cc=naresh.kamboju@linaro.org \
--cc=narmstrong@baylibre.com \
--cc=sboyd@kernel.org \
--cc=tony@atomide.com \
--cc=y.oudjana@protonmail.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).