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Message-Id: <20250807-topic-4ln_dp_respin-v4-3-43272d6eca92@oss.qualcomm.com>
Date: Thu, 07 Aug 2025 18:33:21 +0200
From: Konrad Dybcio <konradybcio@...nel.org>
To: Vinod Koul <vkoul@...nel.org>,
Kishon Vijay Abraham I <kishon@...nel.org>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>, Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konradybcio@...nel.org>
Cc: Marijn Suijten <marijn.suijten@...ainline.org>,
linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
Neil Armstrong <neil.armstrong@...aro.org>,
Dmitry Baryshkov <lumag@...nel.org>
Subject: [PATCH v4 3/6] phy: qcom: qmp-combo: store DP phy power state
From: Neil Armstrong <neil.armstrong@...aro.org>
Switching the PHY Mode requires the DisplayPort PHY to be powered off,
keep track of the DisplayPort phy power state.
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
Signed-off-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
---
drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
index 30749943f66280c3aa9e9673466f6f736d1adbc8..8395035754975808ee1b5b9c48d046a719e79e60 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
@@ -1853,6 +1853,7 @@ struct qmp_combo {
unsigned int dp_aux_cfg;
struct phy_configure_opts_dp dp_opts;
unsigned int dp_init_count;
+ bool dp_powered_on;
struct clk_fixed_rate pipe_clk_fixed;
struct clk_hw dp_link_hw;
@@ -3133,6 +3134,8 @@ static int qmp_combo_dp_power_on(struct phy *phy)
/* Configure link rate, swing, etc. */
cfg->configure_dp_phy(qmp);
+ qmp->dp_powered_on = true;
+
mutex_unlock(&qmp->phy_mutex);
return 0;
@@ -3147,6 +3150,8 @@ static int qmp_combo_dp_power_off(struct phy *phy)
/* Assert DP PHY power down */
writel(DP_PHY_PD_CTL_PSR_PWRDN, qmp->dp_dp_phy + QSERDES_DP_PHY_PD_CTL);
+ qmp->dp_powered_on = false;
+
mutex_unlock(&qmp->phy_mutex);
return 0;
--
2.50.1
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