linux-kernel - [PATCH RFT 2/7] phy: qcom: qmp-combo: store DP phy power state

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Message-Id: <20240229-topic-sm8x50-upstream-phy-combo-typec-mux-v1-2-07e24a231840@linaro.org>
Date: Thu, 29 Feb 2024 14:07:02 +0100
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konrad.dybcio@...aro.org>, Vinod Koul <vkoul@...nel.org>, 
 Kishon Vijay Abraham I <kishon@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Neil Armstrong <neil.armstrong@...aro.org>
Subject: [PATCH RFT 2/7] phy: qcom: qmp-combo: store DP phy power state

Switching the PHY Mode requires the DisplayPort PHY to be powered off,
keep track of the DisplayPort phy power state.

Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
---
 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 2f341613fd31..3721bbea9eae 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
@@ -1500,6 +1500,7 @@ 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;
@@ -2627,6 +2628,8 @@ 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;
@@ -2641,6 +2644,8 @@ 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;

-- 
2.34.1