linux-kernel - [PATCH 0/2] Use APIs in gdsc genpd to switch gdsc mode for venus v4 core

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Message-ID: <20241122-switch_gdsc_mode-v1-0-365f097ecbb0@quicinc.com>
Date: Fri, 22 Nov 2024 16:01:44 +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>,
        Taniya Das <quic_tdas@...cinc.com>
Subject: [PATCH 0/2] Use APIs in gdsc genpd to switch gdsc mode for venus
 v4 core

The Venus driver requires vcodec GDSC to be ON in SW mode for clock
operations and move it back to HW mode to gain power benefits. Earlier,
as there is no interface to switch the GDSC mode from GenPD framework,
the GDSC is moved to HW control mode as part of GDSC enable callback and
venus driver is writing to its POWER_CONTROL register to keep the GDSC ON
from SW whereever required. But 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.

Signed-off-by: Renjiang Han <quic_renjiang@...cinc.com>
---
Renjiang Han (1):
      venus: pm_helpers: Use dev_pm_genpd_set_hwmode to switch GDSC mode on V4

Taniya Das (1):
      clk: qcom: videocc: Use HW_CTRL_TRIGGER flag for video GDSC's

 drivers/clk/qcom/videocc-sc7180.c              |  2 +-
 drivers/clk/qcom/videocc-sdm845.c              |  4 ++--
 drivers/media/platform/qcom/venus/pm_helpers.c | 10 +++++-----
 3 files changed, 8 insertions(+), 8 deletions(-)
---
base-commit: 63b3ff03d91ae8f875fe8747c781a521f78cde17
change-id: 20241122-switch_gdsc_mode-b658ea233c2a

Best regards,
-- 
Renjiang Han <quic_renjiang@...cinc.com>