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From: Stephen Boyd <swboyd@chromium.org>
To: Vinod Koul <vkoul@kernel.org>,
	Kishon Vijay Abraham I <kishon@kernel.org>
Cc: linux-kernel@vger.kernel.org, patches@lists.linux.dev,
	linux-arm-msm@vger.kernel.org,
	Konrad Dybcio <konrad.dybcio@linaro.org>,
	linux-phy@lists.infradead.org, freedreno@lists.freedesktop.org,
	Douglas Anderson <dianders@chromium.org>,
	Abhinav Kumar <quic_abhinavk@quicinc.com>,
	Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
	Neil Armstrong <neil.armstrong@linaro.org>,
	Abel Vesa <abel.vesa@linaro.org>,
	Steev Klimaszewski <steev@kali.org>,
	Johan Hovold <johan+linaro@kernel.org>,
	Bjorn Andersson <quic_bjorande@quicinc.com>
Subject: [PATCH] phy: qcom: qmp-combo: Fix register base for QSERDES_DP_PHY_MODE
Date: Thu,  4 Apr 2024 17:01:03 -0700	[thread overview]
Message-ID: <20240405000111.1450598-1-swboyd@chromium.org> (raw)

The register base that was used to write to the QSERDES_DP_PHY_MODE
register was 'dp_dp_phy' before commit 815891eee668 ("phy:
qcom-qmp-combo: Introduce orientation variable"). There isn't any
explanation in the commit why this is changed, so I suspect it was an
oversight or happened while being extracted from some other series.
Oddly the value being 0x4c or 0x5c doesn't seem to matter for me, so I
suspect this is dead code, but that can be fixed in another patch. It's
not good to write to the wrong register space, and maybe some other
version of this phy relies on this.

Cc: Douglas Anderson <dianders@chromium.org>
Cc: Abhinav Kumar <quic_abhinavk@quicinc.com>
Cc: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Cc: Neil Armstrong <neil.armstrong@linaro.org>
Cc: Abel Vesa <abel.vesa@linaro.org>
Cc: Steev Klimaszewski <steev@kali.org>
Cc: Johan Hovold <johan+linaro@kernel.org>
Cc: Bjorn Andersson <quic_bjorande@quicinc.com>
Fixes: 815891eee668 ("phy: qcom-qmp-combo: Introduce orientation variable")
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
index 7d585a4bbbba..746d009d702b 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
@@ -2150,9 +2150,9 @@ static bool qmp_combo_configure_dp_mode(struct qmp_combo *qmp)
 	writel(val, qmp->dp_dp_phy + QSERDES_DP_PHY_PD_CTL);
 
 	if (reverse)
-		writel(0x4c, qmp->pcs + QSERDES_DP_PHY_MODE);
+		writel(0x4c, qmp->dp_dp_phy + QSERDES_DP_PHY_MODE);
 	else
-		writel(0x5c, qmp->pcs + QSERDES_DP_PHY_MODE);
+		writel(0x5c, qmp->dp_dp_phy + QSERDES_DP_PHY_MODE);
 
 	return reverse;
 }

base-commit: 4cece764965020c22cff7665b18a012006359095
-- 
https://chromeos.dev


WARNING: multiple messages have this Message-ID (diff)
From: Stephen Boyd <swboyd@chromium.org>
To: Vinod Koul <vkoul@kernel.org>,
	Kishon Vijay Abraham I <kishon@kernel.org>
Cc: linux-kernel@vger.kernel.org, patches@lists.linux.dev,
	linux-arm-msm@vger.kernel.org,
	Konrad Dybcio <konrad.dybcio@linaro.org>,
	linux-phy@lists.infradead.org, freedreno@lists.freedesktop.org,
	Douglas Anderson <dianders@chromium.org>,
	Abhinav Kumar <quic_abhinavk@quicinc.com>,
	Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
	Neil Armstrong <neil.armstrong@linaro.org>,
	Abel Vesa <abel.vesa@linaro.org>,
	Steev Klimaszewski <steev@kali.org>,
	Johan Hovold <johan+linaro@kernel.org>,
	Bjorn Andersson <quic_bjorande@quicinc.com>
Subject: [PATCH] phy: qcom: qmp-combo: Fix register base for QSERDES_DP_PHY_MODE
Date: Thu,  4 Apr 2024 17:01:03 -0700	[thread overview]
Message-ID: <20240405000111.1450598-1-swboyd@chromium.org> (raw)

The register base that was used to write to the QSERDES_DP_PHY_MODE
register was 'dp_dp_phy' before commit 815891eee668 ("phy:
qcom-qmp-combo: Introduce orientation variable"). There isn't any
explanation in the commit why this is changed, so I suspect it was an
oversight or happened while being extracted from some other series.
Oddly the value being 0x4c or 0x5c doesn't seem to matter for me, so I
suspect this is dead code, but that can be fixed in another patch. It's
not good to write to the wrong register space, and maybe some other
version of this phy relies on this.

Cc: Douglas Anderson <dianders@chromium.org>
Cc: Abhinav Kumar <quic_abhinavk@quicinc.com>
Cc: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Cc: Neil Armstrong <neil.armstrong@linaro.org>
Cc: Abel Vesa <abel.vesa@linaro.org>
Cc: Steev Klimaszewski <steev@kali.org>
Cc: Johan Hovold <johan+linaro@kernel.org>
Cc: Bjorn Andersson <quic_bjorande@quicinc.com>
Fixes: 815891eee668 ("phy: qcom-qmp-combo: Introduce orientation variable")
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
index 7d585a4bbbba..746d009d702b 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
@@ -2150,9 +2150,9 @@ static bool qmp_combo_configure_dp_mode(struct qmp_combo *qmp)
 	writel(val, qmp->dp_dp_phy + QSERDES_DP_PHY_PD_CTL);
 
 	if (reverse)
-		writel(0x4c, qmp->pcs + QSERDES_DP_PHY_MODE);
+		writel(0x4c, qmp->dp_dp_phy + QSERDES_DP_PHY_MODE);
 	else
-		writel(0x5c, qmp->pcs + QSERDES_DP_PHY_MODE);
+		writel(0x5c, qmp->dp_dp_phy + QSERDES_DP_PHY_MODE);
 
 	return reverse;
 }

base-commit: 4cece764965020c22cff7665b18a012006359095
-- 
https://chromeos.dev


-- 
linux-phy mailing list
linux-phy@lists.infradead.org
https://lists.infradead.org/mailman/listinfo/linux-phy

             reply	other threads:[~2024-04-05  0:01 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-04-05  0:01 Stephen Boyd [this message]
2024-04-05  0:01 ` [PATCH] phy: qcom: qmp-combo: Fix register base for QSERDES_DP_PHY_MODE Stephen Boyd
2024-04-05  0:08 ` Abhinav Kumar
2024-04-05  0:08   ` Abhinav Kumar
2024-04-05  0:56 ` Bjorn Andersson
2024-04-05  0:56   ` Bjorn Andersson
2024-04-05  7:34   ` Johan Hovold
2024-04-05  7:34     ` Johan Hovold
2024-04-05  2:56 ` Dmitry Baryshkov
2024-04-05  2:56   ` Dmitry Baryshkov
2024-04-06  9:18 ` Vinod Koul
2024-04-06  9:18   ` Vinod Koul

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