From: Sean Paul <seanpaul-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
To: abhinavk-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org,
architt-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org,
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jcrouse-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org,
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Cc: Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: [PATCH v3 01/19] dt-bindings: msm/dsi: Add mdp transfer time to msm dsi binding
Date: Fri, 20 Jul 2018 16:42:52 -0400 [thread overview]
Message-ID: <20180720204315.19054-2-seanpaul@chromium.org> (raw)
In-Reply-To: <20180720204315.19054-1-seanpaul-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
From: Jeykumar Sankaran <jsanka@codeaurora.org>
Adds mdp transfer time to msm dsi binding
Changes in v3:
- Added Rob's R-b
Reviewed-by: Rob Herring <robh@kernel.org>
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 prev parent reply other threads:[~2018-07-20 20:42 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-20 20:42 [PATCH v3 00/19] drm/msm: Add support for SDM845 Display Processing Unit (DPU) Sean Paul
2018-07-20 20:42 ` [PATCH v3 03/19] drm: add msm compressed format modifiers Sean Paul
[not found] ` <20180720204315.19054-4-seanpaul-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
2018-07-25 14:09 ` Stanimir Varbanov
2018-07-25 23:09 ` Jeykumar Sankaran
2018-07-26 9:37 ` Stanimir Varbanov
[not found] ` <d224e3ff142d687c07233f70864206af-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2018-07-26 11:45 ` Rob Clark
[not found] ` <CAF6AEGvrpmNVtYJxMR2Ka5S3_oeGm8C_SbeOPZR_TAONhS0_KA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-07-26 14:43 ` [PATCH v4 " Sean Paul
2018-07-20 20:42 ` [PATCH v3 04/19] drm/msm/dsi: adjust dsi timing for dual dsi mode Sean Paul
2018-07-20 20:42 ` [PATCH v3 06/19] drm/msm/dsi: initialize postdiv_lock before use for 10nm pll Sean Paul
2018-07-20 20:43 ` [PATCH v3 09/19] drm/msm/mdp5: subclass msm_mdss for mdp5 Sean Paul
2018-07-20 20:43 ` [PATCH v3 12/19] drm/msm: Clean up dangling atomic_wq Sean Paul
[not found] ` <20180720204315.19054-1-seanpaul-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
2018-07-20 20:42 ` Sean Paul [this message]
2018-07-20 20:42 ` [PATCH v3 02/19] drm: Add support for pps and compression mode command packet Sean Paul
2018-07-20 20:42 ` [PATCH v3 05/19] drm/msm/dsi: Use one connector for dual DSI mode Sean Paul
2018-07-20 20:42 ` [PATCH v3 07/19] drm/msm/dsi: set encoder mode for DRM bridge explicitly Sean Paul
2018-07-20 20:42 ` [PATCH v3 08/19] drm/msm: Move wait_for_vblanks into mdp complete_commit() hooks Sean Paul
2018-07-20 20:43 ` [PATCH v3 10/19] drm/msm: enable zpos normalization Sean Paul
2018-07-20 20:43 ` [PATCH v3 11/19] drm/msm: higher values of pclk can exceed 32 bits when multiplied by a factor Sean Paul
2018-07-20 20:43 ` [PATCH v3 13/19] drm/msm: #define MDP version numbers Sean Paul
2018-07-20 20:43 ` [PATCH v3 14/19] drm/msm: Use labels for unwinding in the error path Sean Paul
2018-07-20 20:43 ` [PATCH v3 15/19] drm/msm: #define MAX_<OBJECT> in msm_drv.h Sean Paul
2018-07-20 20:43 ` [PATCH v3 16/19] drm/msm: Add .commit() callback to msm_kms functions Sean Paul
2018-07-20 20:43 ` [PATCH v3 17/19] drm/msm: Add pm_suspend/resume callbacks to msm_kms Sean Paul
2018-07-20 20:43 ` [PATCH v3 18/19] dt-bindings: msm/disp: Add bindings for Snapdragon 845 DPU Sean Paul
2018-07-24 23:31 ` Rob Herring
2018-07-20 20:43 ` [PATCH v3 19/19] drm/msm: Add SDM845 DPU support Sean Paul
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