linux-kernel - [PATCH 2/3] clk: qcom: dispcc-sc7280: Add dispcc resets

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20250811-sc7280-mdss-reset-v1-2-83ceff1d48de@oss.qualcomm.com>
Date: Mon, 11 Aug 2025 22:11:34 -0500
From: Bjorn Andersson <bjorn.andersson@....qualcomm.com>
To: Bjorn Andersson <andersson@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        cros-qcom-dts-watchers@...omium.org,
        Konrad Dybcio <konradybcio@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Bjorn Andersson <bjorn.andersson@....qualcomm.com>
Subject: [PATCH 2/3] clk: qcom: dispcc-sc7280: Add dispcc resets

Like many other platforms the sc7280 display clock controller provides
a couple of resets for the display subsystem. In particular the
MDSS_CORE_BCR is useful to reset the display subsystem to a known state
during boot, so add these.

Signed-off-by: Bjorn Andersson <bjorn.andersson@....qualcomm.com>
---
 drivers/clk/qcom/dispcc-sc7280.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/clk/qcom/dispcc-sc7280.c b/drivers/clk/qcom/dispcc-sc7280.c
index 8bdf57734a3d47fdf8bd2053640d8ef462677556..465dc06c87128182348a4e0ea384af779647bd84 100644
--- a/drivers/clk/qcom/dispcc-sc7280.c
+++ b/drivers/clk/qcom/dispcc-sc7280.c
@@ -17,6 +17,7 @@
 #include "clk-regmap-divider.h"
 #include "common.h"
 #include "gdsc.h"
+#include "reset.h"
 
 enum {
 	P_BI_TCXO,
@@ -847,6 +848,11 @@ static struct gdsc *disp_cc_sc7280_gdscs[] = {
 	[DISP_CC_MDSS_CORE_GDSC] = &disp_cc_mdss_core_gdsc,
 };
 
+static const struct qcom_reset_map disp_cc_sc7280_resets[] = {
+	[DISP_CC_MDSS_CORE_BCR] = { 0x1000 },
+	[DISP_CC_MDSS_RSCC_BCR] = { 0x2000 },
+};
+
 static const struct regmap_config disp_cc_sc7280_regmap_config = {
 	.reg_bits = 32,
 	.reg_stride = 4,
@@ -861,6 +867,8 @@ static const struct qcom_cc_desc disp_cc_sc7280_desc = {
 	.num_clks = ARRAY_SIZE(disp_cc_sc7280_clocks),
 	.gdscs = disp_cc_sc7280_gdscs,
 	.num_gdscs = ARRAY_SIZE(disp_cc_sc7280_gdscs),
+	.resets = disp_cc_sc7280_resets,
+	.num_resets = ARRAY_SIZE(disp_cc_sc7280_resets),
 };
 
 static const struct of_device_id disp_cc_sc7280_match_table[] = {

-- 
2.49.0