linux-kernel - [PATCH 2/4] clk: qcom: dispcc-sm6350: Add *_wait

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Message-Id: <20250425-sm6350-gdsc-val-v1-2-1f252d9c5e4e@fairphone.com>
Date: Fri, 25 Apr 2025 14:12:56 +0200
From: Luca Weiss <luca.weiss@...rphone.com>
To: Bjorn Andersson <andersson@...nel.org>, 
 Michael Turquette <mturquette@...libre.com>, 
 Stephen Boyd <sboyd@...nel.org>, Konrad Dybcio <konradybcio@...nel.org>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...ainline.org>
Cc: ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org, 
 linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Luca Weiss <luca.weiss@...rphone.com>
Subject: [PATCH 2/4] clk: qcom: dispcc-sm6350: Add *_wait_val values for
 GDSCs

Compared to the msm-4.19 driver the mainline GDSC driver always sets the
bits for en_rest, en_few & clk_dis, and if those values are not set
per-GDSC in the respective driver then the default value from the GDSC
driver is used. The downstream driver only conditionally sets
clk_dis_wait_val if qcom,clk-dis-wait-val is given in devicetree.

Correct this situation by explicitly setting those values. For all GDSCs
the reset value of those bits are used.

Fixes: 837519775f1d ("clk: qcom: Add display clock controller driver for SM6350")
Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
---
 drivers/clk/qcom/dispcc-sm6350.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/clk/qcom/dispcc-sm6350.c b/drivers/clk/qcom/dispcc-sm6350.c
index e703ecf00e440473156f707498f23cde53fb7e22..b0bd163a449ccd2b27751e32eb17a982facf07d8 100644
--- a/drivers/clk/qcom/dispcc-sm6350.c
+++ b/drivers/clk/qcom/dispcc-sm6350.c
@@ -681,6 +681,9 @@ static struct clk_branch disp_cc_xo_clk = {
 
 static struct gdsc mdss_gdsc = {
 	.gdscr = 0x1004,
+	.en_rest_wait_val = 0x2,
+	.en_few_wait_val = 0x2,
+	.clk_dis_wait_val = 0xf,
 	.pd = {
 		.name = "mdss_gdsc",
 	},

-- 
2.49.0