linux-kernel - [PATCH v2 2/2] venus: pm_helpers: Use dev_pm_genpd_set

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Message-ID: <20241223-switch_gdsc_mode-v2-2-eb5c96aee662@quicinc.com>
Date: Mon, 23 Dec 2024 14:32:42 +0530
From: Renjiang Han <quic_renjiang@...cinc.com>
To: Bjorn Andersson <andersson@...nel.org>,
        Michael Turquette
	<mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Stanimir Varbanov
	<stanimir.k.varbanov@...il.com>,
        Vikash Garodia <quic_vgarodia@...cinc.com>,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        Mauro Carvalho Chehab
	<mchehab@...nel.org>
CC: <linux-arm-msm@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-media@...r.kernel.org>,
        Renjiang Han
	<quic_renjiang@...cinc.com>
Subject: [PATCH v2 2/2] venus: pm_helpers: Use dev_pm_genpd_set_hwmode to
 switch GDSC mode on V4

The POWER_CONTROL register addresses are not constant and can vary across
the variants. Also as per the HW recommendation, the GDSC mode switching
needs to be controlled from respective GDSC register and this is a uniform
approach across all the targets. Hence use dev_pm_genpd_set_hwmode() API
which controls GDSC mode switching using its respective GDSC register.

In venus v4 variants, the vcodec gdsc gets enabled in SW mode by default
with new HW_CTRL_TRIGGER flag and there is no need to switch it to SW mode
again after enable, hence add check to avoid switching gdsc to SW mode
again after gdsc enable. Similarly add check to avoid switching GDSC to HW
mode before disabling the GDSC, so GDSC gets enabled in SW mode in the
next enable.

Signed-off-by: Renjiang Han <quic_renjiang@...cinc.com>
---
 drivers/media/platform/qcom/venus/pm_helpers.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/media/platform/qcom/venus/pm_helpers.c b/drivers/media/platform/qcom/venus/pm_helpers.c
index 33a5a659c0ada0ca97eebb5522c5f349f95c49c7..a2062b366d4aedba3eb5e4be456a005847eaec0b 100644
--- a/drivers/media/platform/qcom/venus/pm_helpers.c
+++ b/drivers/media/platform/qcom/venus/pm_helpers.c
@@ -412,7 +412,7 @@ static int vcodec_control_v4(struct venus_core *core, u32 coreid, bool enable)
 	u32 val;
 	int ret;
 
-	if (IS_V6(core))
+	if (IS_V6(core) || IS_V4(core))
 		return dev_pm_genpd_set_hwmode(core->pmdomains->pd_devs[coreid], !enable);
 	else if (coreid == VIDC_CORE_ID_1) {
 		ctrl = core->wrapper_base + WRAPPER_VCODEC0_MMCC_POWER_CONTROL;
@@ -450,7 +450,7 @@ static int poweroff_coreid(struct venus_core *core, unsigned int coreid_mask)
 
 		vcodec_clks_disable(core, core->vcodec0_clks);
 
-		if (!IS_V6(core)) {
+		if (!IS_V6(core) && !IS_V4(core)) {
 			ret = vcodec_control_v4(core, VIDC_CORE_ID_1, false);
 			if (ret)
 				return ret;
@@ -468,7 +468,7 @@ static int poweroff_coreid(struct venus_core *core, unsigned int coreid_mask)
 
 		vcodec_clks_disable(core, core->vcodec1_clks);
 
-		if (!IS_V6(core)) {
+		if (!IS_V6(core) && !IS_V4(core)) {
 			ret = vcodec_control_v4(core, VIDC_CORE_ID_2, false);
 			if (ret)
 				return ret;
@@ -491,7 +491,7 @@ static int poweron_coreid(struct venus_core *core, unsigned int coreid_mask)
 		if (ret < 0)
 			return ret;
 
-		if (!IS_V6(core)) {
+		if (!IS_V6(core) && !IS_V4(core)) {
 			ret = vcodec_control_v4(core, VIDC_CORE_ID_1, true);
 			if (ret)
 				return ret;
@@ -511,7 +511,7 @@ static int poweron_coreid(struct venus_core *core, unsigned int coreid_mask)
 		if (ret < 0)
 			return ret;
 
-		if (!IS_V6(core)) {
+		if (!IS_V6(core) && !IS_V4(core)) {
 			ret = vcodec_control_v4(core, VIDC_CORE_ID_2, true);
 			if (ret)
 				return ret;

-- 
2.34.1