From: Brian Norris <briannorris@chromium.org>
To: MyungJoo Ham <myungjoo.ham@samsung.com>,
Kyungmin Park <kyungmin.park@samsung.com>,
Chanwoo Choi <cw00.choi@samsung.com>,
Rob Herring <robh+dt@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org,
Lin Huang <hl@rock-chips.com>,
linux-arm-kernel@lists.infradead.org,
Derek Basehore <dbasehore@chromium.org>,
devicetree@vger.kernel.org, linux-pm@vger.kernel.org,
Heiko Stuebner <heiko@sntech.de>,
Brian Norris <briannorris@chromium.org>
Subject: [PATCH v2 09/15] PM / devfreq: rk3399_dmc: Support new disable-freq properties
Date: Thu, 27 Jan 2022 15:07:20 -0800 [thread overview]
Message-ID: <20220127150615.v2.9.I08d654522b8a1ae92ecb8d2e2a74511f778f61e5@changeid> (raw)
In-Reply-To: <20220127230727.3369358-1-briannorris@chromium.org>
Implement the newly-defined properties to allow disabling certain
power-saving-at-idle features at higher frequencies.
This is a rewritten version of work by Lin Huang <hl@rock-chips.com>.
Signed-off-by: Brian Norris <briannorris@chromium.org>
---
(no changes since v1)
drivers/devfreq/rk3399_dmc.c | 51 +++++++++++++++++++++++++++++++++---
1 file changed, 47 insertions(+), 4 deletions(-)
diff --git a/drivers/devfreq/rk3399_dmc.c b/drivers/devfreq/rk3399_dmc.c
index c4efbc15cbb1..fc740c1f6747 100644
--- a/drivers/devfreq/rk3399_dmc.c
+++ b/drivers/devfreq/rk3399_dmc.c
@@ -55,6 +55,12 @@ struct rk3399_dmcfreq {
unsigned int ddr3_odt_dis_freq;
unsigned int lpddr3_odt_dis_freq;
unsigned int lpddr4_odt_dis_freq;
+
+ unsigned int pd_idle_dis_freq;
+ unsigned int sr_idle_dis_freq;
+ unsigned int sr_mc_gate_idle_dis_freq;
+ unsigned int srpd_lite_idle_dis_freq;
+ unsigned int standby_idle_dis_freq;
};
static int rk3399_dmcfreq_target(struct device *dev, unsigned long *freq,
@@ -81,8 +87,25 @@ static int rk3399_dmcfreq_target(struct device *dev, unsigned long *freq,
mutex_lock(&dmcfreq->lock);
if (dmcfreq->regmap_pmu) {
+ unsigned int odt_pd_arg0 = dmcfreq->odt_pd_arg0;
+ unsigned int odt_pd_arg1 = dmcfreq->odt_pd_arg1;
unsigned int odt_pd_arg2 = 0;
+ if (target_rate >= dmcfreq->sr_idle_dis_freq)
+ odt_pd_arg0 &= ~RK3399_SET_ODT_PD_0_SR_IDLE;
+
+ if (target_rate >= dmcfreq->sr_mc_gate_idle_dis_freq)
+ odt_pd_arg0 &= ~RK3399_SET_ODT_PD_0_SR_MC_GATE_IDLE;
+
+ if (target_rate >= dmcfreq->standby_idle_dis_freq)
+ odt_pd_arg0 &= ~RK3399_SET_ODT_PD_0_STANDBY_IDLE;
+
+ if (target_rate >= dmcfreq->pd_idle_dis_freq)
+ odt_pd_arg1 &= ~RK3399_SET_ODT_PD_1_PD_IDLE;
+
+ if (target_rate >= dmcfreq->srpd_lite_idle_dis_freq)
+ odt_pd_arg1 &= ~RK3399_SET_ODT_PD_1_SRPD_LITE_IDLE;
+
if (target_rate >= dmcfreq->odt_dis_freq)
odt_pd_arg2 |= RK3399_SET_ODT_PD_2_ODT_ENABLE;
@@ -91,10 +114,9 @@ static int rk3399_dmcfreq_target(struct device *dev, unsigned long *freq,
* (power-down) timings and to enable or disable the
* ODT (on-die termination) resistors.
*/
- arm_smccc_smc(ROCKCHIP_SIP_DRAM_FREQ, dmcfreq->odt_pd_arg0,
- dmcfreq->odt_pd_arg1,
- ROCKCHIP_SIP_CONFIG_DRAM_SET_ODT_PD,
- odt_pd_arg2, 0, 0, 0, &res);
+ arm_smccc_smc(ROCKCHIP_SIP_DRAM_FREQ, odt_pd_arg0, odt_pd_arg1,
+ ROCKCHIP_SIP_CONFIG_DRAM_SET_ODT_PD, odt_pd_arg2,
+ 0, 0, 0, &res);
}
/*
@@ -230,6 +252,16 @@ static int rk3399_dmcfreq_of_props(struct rk3399_dmcfreq *data,
{
int ret = 0;
+ /*
+ * These are all optional, and serve as minimum bounds. Give them large
+ * (i.e., never "disabled") values if the DT doesn't specify one.
+ */
+ data->pd_idle_dis_freq =
+ data->sr_idle_dis_freq =
+ data->sr_mc_gate_idle_dis_freq =
+ data->srpd_lite_idle_dis_freq =
+ data->standby_idle_dis_freq = UINT_MAX;
+
ret |= of_property_read_u32(np, "rockchip,pd_idle",
&data->pd_idle);
ret |= of_property_read_u32(np, "rockchip,sr_idle",
@@ -247,6 +279,17 @@ static int rk3399_dmcfreq_of_props(struct rk3399_dmcfreq *data,
ret |= of_property_read_u32(np, "rockchip,lpddr4_odt_dis_freq",
&data->lpddr4_odt_dis_freq);
+ ret |= of_property_read_u32(np, "rockchip,pd-idle-dis-freq-hz",
+ &data->pd_idle_dis_freq);
+ ret |= of_property_read_u32(np, "rockchip,sr-idle-dis-freq-hz",
+ &data->sr_idle_dis_freq);
+ ret |= of_property_read_u32(np, "rockchip,sr-mc-gate-idle-dis-freq-hz",
+ &data->sr_mc_gate_idle_dis_freq);
+ ret |= of_property_read_u32(np, "rockchip,srpd-lite-idle-dis-freq-hz",
+ &data->srpd_lite_idle_dis_freq);
+ ret |= of_property_read_u32(np, "rockchip,standby-idle-dis-freq-hz",
+ &data->standby_idle_dis_freq);
+
return ret;
}
--
2.35.0.rc0.227.g00780c9af4-goog
next prev parent reply other threads:[~2022-01-27 23:09 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-27 23:07 [PATCH v2 00/15] rk3399: Clean up and enable DDR DVFS Brian Norris
2022-01-27 23:07 ` [PATCH v2 01/15] dt-bindings: devfreq: rk3399_dmc: Convert to YAML Brian Norris
2022-02-09 20:17 ` Rob Herring
2022-03-04 21:23 ` Brian Norris
2022-01-27 23:07 ` [PATCH v2 02/15] dt-bindings: devfreq: rk3399_dmc: Deprecate unused/redundant properties Brian Norris
2022-01-27 23:17 ` Brian Norris
2022-01-27 23:07 ` [PATCH v2 03/15] dt-bindings: devfreq: rk3399_dmc: Fix Hz units Brian Norris
2022-02-04 1:59 ` Chanwoo Choi
2022-02-09 20:19 ` Rob Herring
2022-01-27 23:07 ` [PATCH v2 04/15] dt-bindings: devfreq: rk3399_dmc: Specify idle params in nanoseconds Brian Norris
2022-02-09 20:21 ` Rob Herring
2022-01-27 23:07 ` [PATCH v2 05/15] dt-bindings: devfreq: rk3399_dmc: Add more disable-freq properties Brian Norris
2022-02-09 20:29 ` Rob Herring
2022-01-27 23:07 ` [PATCH v2 06/15] PM / devfreq: rk3399_dmc: Drop undocumented ondemand DT props Brian Norris
2022-01-27 23:07 ` [PATCH v2 07/15] PM / devfreq: rk3399_dmc: Drop excess timing properties Brian Norris
2022-01-27 23:07 ` [PATCH v2 08/15] PM / devfreq: rk3399_dmc: Use bitfield macro definitions for ODT_PD Brian Norris
2022-01-27 23:07 ` Brian Norris [this message]
2022-01-27 23:07 ` [PATCH v2 10/15] PM / devfreq: rk3399_dmc: Support new *-ns properties Brian Norris
2022-01-27 23:07 ` [PATCH v2 11/15] arm64: dts: rk3399: Add dfi and dmc nodes Brian Norris
2022-01-27 23:07 ` [PATCH v2 12/15] arm64: dts: rockchip: Enable dmc and dfi nodes on gru Brian Norris
2022-03-04 14:47 ` Peter Geis
2022-03-04 20:47 ` Brian Norris
2022-04-06 2:05 ` Brian Norris
2022-04-07 0:18 ` Peter Geis
2022-01-27 23:07 ` [PATCH v2 13/15] PM / devfreq: rk3399_dmc: Disable edev on remove() Brian Norris
2022-01-27 23:07 ` [PATCH v2 14/15] PM / devfreq: rk3399_dmc: Use devm_pm_opp_of_add_table() Brian Norris
2022-01-27 23:07 ` [PATCH v2 15/15] PM / devfreq: rk3399_dmc: Avoid static (reused) profile Brian Norris
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