linux-kernel - [PATCH v2 04/18] clk: qcom: gcc-sa8775p: Set delay for Venus CLK resets

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Message-Id: <20240105-topic-venus_reset-v2-4-c37eba13b5ce@linaro.org>
Date: Tue, 06 Feb 2024 19:43:37 +0100
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: Bjorn Andersson <andersson@...nel.org>, 
 Michael Turquette <mturquette@...libre.com>, 
 Stephen Boyd <sboyd@...nel.org>, Philipp Zabel <p.zabel@...gutronix.de>
Cc: Marijn Suijten <marijn.suijten@...ainline.org>, 
 linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Bryan O'Donoghue <bryan.odonoghue@...aro.org>, 
 Dikshita Agarwal <quic_dikshita@...cinc.com>, 
 Vikash Garodia <quic_vgarodia@...cinc.com>, 
 Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>, 
 Konrad Dybcio <konrad.dybcio@...aro.org>
Subject: [PATCH v2 04/18] clk: qcom: gcc-sa8775p: Set delay for Venus CLK
 resets

Some Venus resets may require more time when toggling. Describe that.

The value was obtained on a best-guess basis: msm-5.4 being the base
kernel for this SoC and 8775 being generally close to 8350 which is known
to require a higher delay [1].

[1] https://git.codelinaro.org/clo/la/platform/vendor/opensource/video-driver/-/commit/dfe241edf23daf3c1ccbb79b02798965123fad98
Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
---
 drivers/clk/qcom/gcc-sa8775p.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/qcom/gcc-sa8775p.c b/drivers/clk/qcom/gcc-sa8775p.c
index 8171d23c96e6..c2b403cb6301 100644
--- a/drivers/clk/qcom/gcc-sa8775p.c
+++ b/drivers/clk/qcom/gcc-sa8775p.c
@@ -4662,8 +4662,8 @@ static const struct qcom_reset_map gcc_sa8775p_resets[] = {
 	[GCC_USB3UNIPHY_PHY_MP0_BCR] = { 0x5c020 },
 	[GCC_USB3UNIPHY_PHY_MP1_BCR] = { 0x5c024 },
 	[GCC_USB_PHY_CFG_AHB2PHY_BCR] = { 0x76000 },
-	[GCC_VIDEO_AXI0_CLK_ARES] = { 0x34014, 2 },
-	[GCC_VIDEO_AXI1_CLK_ARES] = { 0x3401c, 2 },
+	[GCC_VIDEO_AXI0_CLK_ARES] = { .reg = 0x34014, .bit = 2, .udelay = 400 },
+	[GCC_VIDEO_AXI1_CLK_ARES] = { .reg = 0x3401c, .bit = 2, .udelay = 400 },
 	[GCC_VIDEO_BCR] = { 0x34000 },
 };
 

-- 
2.43.0