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Commit 7079e398 authored by Rahul Sharma's avatar Rahul Sharma Committed by Gerrit - the friendly Code Review server
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drm/msm/sde: add shared display support 



Add support to shared display for panel stacking and split screen
application.

The current DRM framework only allows one atomic commit for
each display, this change will create virtual display pipelines
based on the physical display pipeline, and each virtual display
can support independent async atomic commit.

With the change user mode application can setup and update
display on each virtual display and share the same physical port.
No mode switch is allowed on virtual display. When all virtual
displays are powered off,  the physical display will also power off.

Change-Id: Ibf9a7dd1a96c59b6db9891d826cb4f11b409696c
Signed-off-by: default avatarXiaowen Wu <wxiaowen@codeaurora.org>
Signed-off-by: default avatarRahul Sharma <rahsha@codeaurora.org>
parent c2161416

Documentation/devicetree/bindings/drm/msm/sde-shd.txt

0 → 100644
+77 −0
Original line number Diff line number Diff line 
QTI Snapdragon Display Engine (SDE) shared display



Required properties:

- compatible:		"qcom,shared-display"

- qcom,shared-display-base: node handle of qcom,shared-display-base, see below.

- qcom,blend-stage-range: blend stage range that are not shared in one display

- qcom,shared-display-src-mode: source resolution of the shared display, contains

			two properties:

			qcom,mode-h-active: horizontal resolution

			qcom,mode-v-active: vertical resolution

- qcom,shared-display-dst-mode: destination rectangle in the shared display,

			contains 4 properties:

			qcom,mode-x-offset: x offset inside the shared display

			qcom,mode-y-offset: y offset inside the shared display

			qcom,mode-width: width inside the shared display

			qcom,mode-height: height inside the shared display





qcom,shared-display-base properties:

- qcom,shared-display-base-intf: intf index of the base display

- qcom,shared-display-base-mst: if display is DP MST type, optional

- qcom,shared-display-base-mode: timing of the base display, contains the

			following properties:

			qcom,mode-h-active: H active size

			qcom,mode-h-front-porch: H front portch

			qcom,mode-h-pulse-width: H pulse width

			qcom,mode-h-back-porch: H back porch

			qcom,mode-h-active-high: if H active polarity is high

			qcom,mode-v-active: V active size

			qcom,mode-v-front-porch: V front portch

			qcom,mode-v-pulse-width: V pulse width

			qcom,mode-v-back-porch: V back porch

			qcom,mode-v-active-high: if V active polarity is high

			qcom,mode-refresh-rate: vertial refresh rate

			qcom,mode-clock-in-khz: clock in kHz



Example:



/ {

	...



	sde_sh_base0: qcom,shared-display-base@0 {

		qcom,shared-display-base-intf = <0>;

		qcom,shared-display-base-mst;

		qcom,shared-display-base-mode {

			qcom,mode-h-active = <3840>;

			qcom,mode-h-front-porch = <176>;

			qcom,mode-h-pulse-width = <88>;

			qcom,mode-h-back-porch = <296>;

			qcom,mode-h-active-high;

			qcom,mode-v-active = <2160>;

			qcom,mode-v-front-porch = <8>;

			qcom,mode-v-pulse-width = <10>;

			qcom,mode-v-back-porch = <72>;

			qcom,mode-v-active-high;

			qcom,mode-refresh-rate = <30>;

			qcom,mode-clock-in-khz = <297000>;

		};

	};



	sde_sh0: qcom,shared-display@0 {

		compatible = "qcom,shared-display";

		qcom,shared-display-base = <&sde_sh_base0>;

		qcom,blend-stage-range = <0 5>;

		qcom,shared-display-src-mode {

			qcom,mode-h-active = <1920>;

			qcom,mode-v-active = <1080>;

		};

		qcom,shared-display-dst-mode {

			qcom,mode-x-offset = <0>;

			qcom,mode-y-offset = <0>;

			qcom,mode-width = <1920>;

			qcom,mode-height = <1080>;

		};

	};



};

drivers/gpu/drm/msm/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -93,6 +93,16 @@ config DRM_SDE_WB 
	help

	  Choose this option for writeback connector support.



config DRM_SDE_SHD

	bool "Enable Shared display support in SDE DRM"

	depends on DRM_MSM

	help

	  Choose this option for shared display support.

	  This option enables multiple logical displays

	  to share one base physical encoder/connector.

	  Each logical display will appear as different

	  connectors and report back to user.



config DRM_SDE_HDMI

	bool "Enable HDMI driver support in DRM SDE driver"

	depends on DRM_MSM

drivers/gpu/drm/msm/Makefile

+3 −0
Original line number Diff line number Diff line
@@ -136,6 +136,9 @@ msm_drm-$(CONFIG_DRM_MSM) += \ 
msm_drm-$(CONFIG_DRM_SDE_WB) += sde/sde_wb.o \

	sde/sde_encoder_phys_wb.o



msm_drm-$(CONFIG_DRM_SDE_SHD) += sde/sde_shd.o \

	sde/sde_encoder_phys_shd.o



msm_drm-$(CONFIG_DRM_MSM) += \

	msm_atomic.o \

	msm_drv.o \

drivers/gpu/drm/msm/msm_drv.h

+2 −0
Original line number Diff line number Diff line
@@ -196,12 +196,14 @@ enum msm_display_compression { 
 * @MSM_DISPLAY_CAP_CMD_MODE:           Command mode supported

 * @MSM_DISPLAY_CAP_HOT_PLUG:           Hot plug detection supported

 * @MSM_DISPLAY_CAP_EDID:               EDID supported

 * @MSM_DISPLAY_CAP_SHARED:             Display is shared

 */

enum msm_display_caps {

	MSM_DISPLAY_CAP_VID_MODE	= BIT(0),

	MSM_DISPLAY_CAP_CMD_MODE	= BIT(1),

	MSM_DISPLAY_CAP_HOT_PLUG	= BIT(2),

	MSM_DISPLAY_CAP_EDID		= BIT(3),

	MSM_DISPLAY_CAP_SHARED		= BIT(4),

};



/**

drivers/gpu/drm/msm/sde/sde_connector.h

+4 −0
Original line number Diff line number Diff line
@@ -202,6 +202,8 @@ struct sde_connector_ops { 
 * @property_data: Array of private data for generic property handling

 * @blob_caps: Pointer to blob structure for 'capabilities' property

 * @blob_hdr: Pointer to blob structure for 'hdr_properties' property

 * @is_shared: connector is shared

 * @shared_roi: roi of the shared display

 */

struct sde_connector {

	struct drm_connector base;
@@ -228,6 +230,8 @@ struct sde_connector { 
	struct msm_property_data property_data[CONNECTOR_PROP_COUNT];

	struct drm_property_blob *blob_caps;

	struct drm_property_blob *blob_hdr;

	bool is_shared;

	struct sde_rect shared_roi;

};



/**