linux-kernel - [PATCH v2 07/18] clk: qcom: gcc-sm4450: Set delay for Venus CLK resets

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Message-Id: <20240105-topic-venus_reset-v2-7-c37eba13b5ce@linaro.org>
Date: Tue, 06 Feb 2024 19:43:40 +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 07/18] clk: qcom: gcc-sm4450: 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 4450 being somewhat 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-sm4450.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/qcom/gcc-sm4450.c b/drivers/clk/qcom/gcc-sm4450.c
index 31abe2775fc8..ab8fb77d15a2 100644
--- a/drivers/clk/qcom/gcc-sm4450.c
+++ b/drivers/clk/qcom/gcc-sm4450.c
@@ -2791,8 +2791,8 @@ static const struct qcom_reset_map gcc_sm4450_resets[] = {
 	[GCC_VENUS_BCR] = { 0xb601c },
 	[GCC_VIDEO_BCR] = { 0x42000 },
 	[GCC_VIDEO_VENUS_BCR] = { 0xb6000 },
-	[GCC_VENUS_CTL_AXI_CLK_ARES] = { 0x4201c, 2 },
-	[GCC_VIDEO_VENUS_CTL_CLK_ARES] = { 0xb6038, 2 },
+	[GCC_VENUS_CTL_AXI_CLK_ARES] = { .reg = 0x4201c, .bit = 2, .udelay = 400 },
+	[GCC_VIDEO_VENUS_CTL_CLK_ARES] = { .reg = 0xb6038, .bit = 2, .udelay = 400 },
 };
 
 static const struct clk_rcg_dfs_data gcc_dfs_clocks[] = {

-- 
2.43.0