From: Sean Paul <seanpaul@chromium.org>
To: abhinavk@codeaurora.org, architt@codeaurora.org,
chandanu@codeaurora.org, jsanka@codeaurora.org,
jcrouse@codeaurora.org, ryadav@codeaurora.org,
seanpaul@chromium.org, skolluku@codeaurora.org,
dri-devel@lists.freedesktop.org, robdclark@gmail.com,
airlied@linux.ie, freedreno@lists.freedesktop.org,
linux-arm-msm@vger.kernel.org, nganji@codeaurora.org,
hoegsberg@chromium.org, dovizu@chromium.org, robh+dt@kernel.org
Cc: Mark Rutland <mark.rutland@arm.com>, devicetree@vger.kernel.org
Subject: [PATCH 01/21] dt-bindings: msm/dsi: Add mdp transfer time to msm dsi binding
Date: Mon, 9 Jul 2018 13:31:37 -0400 [thread overview]
Message-ID: <20180709173200.238457-2-seanpaul@chromium.org> (raw)
In-Reply-To: <20180709173200.238457-1-seanpaul@chromium.org>
From: Jeykumar Sankaran <jsanka@codeaurora.org>
Adds mdp transfer time to msm dsi binding
Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org>
Signed-off-by: Rajesh Yadav <ryadav@codeaurora.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
---
.../devicetree/bindings/display/msm/dsi.txt | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/Documentation/devicetree/bindings/display/msm/dsi.txt b/Documentation/devicetree/bindings/display/msm/dsi.txt
index 518e9cdf0d4b..d22237a88eae 100644
--- a/Documentation/devicetree/bindings/display/msm/dsi.txt
+++ b/Documentation/devicetree/bindings/display/msm/dsi.txt
@@ -121,6 +121,20 @@ Required properties:
Optional properties:
- qcom,dsi-phy-regulator-ldo-mode: Boolean value indicating if the LDO mode PHY
regulator is wanted.
+- qcom,mdss-mdp-transfer-time-us: Specifies the dsi transfer time for command mode
+ panels in microseconds. Driver uses this number to adjust
+ the clock rate according to the expected transfer time.
+ Increasing this value would slow down the mdp processing
+ and can result in slower performance.
+ Decreasing this value can speed up the mdp processing,
+ but this can also impact power consumption.
+ As a rule this time should not be higher than the time
+ that would be expected with the processing at the
+ dsi link rate since anyways this would be the maximum
+ transfer time that could be achieved.
+ If ping pong split is enabled, this time should not be higher
+ than two times the dsi link rate time.
+ If the property is not specified, then the default value is 14000 us.
[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
[2] Documentation/devicetree/bindings/graph.txt
@@ -171,6 +185,8 @@ Example:
qcom,master-dsi;
qcom,sync-dual-dsi;
+ qcom,mdss-mdp-transfer-time-us = <12000>;
+
pinctrl-names = "default", "sleep";
pinctrl-0 = <&dsi_active>;
pinctrl-1 = <&dsi_suspend>;
--
Sean Paul, Software Engineer, Google / Chromium OS
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next parent reply other threads:[~2018-07-09 17:31 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20180709173200.238457-1-seanpaul@chromium.org>
2018-07-09 17:31 ` Sean Paul [this message]
[not found] ` <20180709173200.238457-2-seanpaul-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
2018-07-20 14:13 ` [PATCH 01/21] dt-bindings: msm/dsi: Add mdp transfer time to msm dsi binding Rob Herring
2018-07-09 17:31 ` [PATCH 19/21] dt-bindings: msm/disp: Add bindings for Snapdragon 845 DPU Sean Paul
[not found] ` <20180709173200.238457-20-seanpaul-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
2018-07-12 21:08 ` [PATCH v2 " Sean Paul
[not found] ` <20180712210849.146638-1-seanpaul-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
2018-07-16 16:21 ` Rob Herring
[not found] ` <20180709173200.238457-1-seanpaul-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
2018-07-09 17:31 ` [PATCH 02/21] dt-bindings: clock: Introduce QCOM Display clock bindings Sean Paul
2018-07-09 17:31 ` [PATCH 21/21] arm64: dts: qcom: sdm845: Add dpu to sdm845 dts file Sean Paul
2018-07-09 18:07 ` Rob Herring
2018-07-09 18:35 ` Sean Paul
2018-07-09 19:03 ` Rob Clark
2018-07-12 21:13 ` [PATCH v2 " Sean Paul
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