Commit 77b001ac authored by Abhinav Kumar's avatar Abhinav Kumar Committed by Dmitry Baryshkov
Browse files

drm/msm/dpu: add the writeback connector layer 



Introduce the dpu_writeback module which serves as the
interface between dpu operations and the drm_writeback.

This module manages the connector related operations for
dpu writeback.

changes in v2:
	- start using drm_writeback_connector_init_with_encoder()
	- drop unnecessary arguments from dpu_writeback_init()
	- rebase on msm-next tip and remove usage of priv->connectors

changes in v3:
	- none

changes in v4:
	- none

changes in v5:
	- store the drm_enc in the dpu_wb_conn to be used while
	  using dpu_encoder APIs

Signed-off-by: default avatarAbhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/483520/
Link: https://lore.kernel.org/r/1650984096-9964-15-git-send-email-quic_abhinavk@quicinc.com


Signed-off-by: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
parent d7d0e73f

drivers/gpu/drm/msm/Makefile

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Original line number Diff line number Diff line
@@ -80,6 +80,7 @@ msm-$(CONFIG_DRM_MSM_DPU) += \ 
	disp/dpu1/dpu_plane.o \

	disp/dpu1/dpu_rm.o \

	disp/dpu1/dpu_vbif.o \

	disp/dpu1/dpu_writeback.o



msm-$(CONFIG_DRM_MSM_MDSS) += \

	msm_mdss.o \

drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c

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// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.

 */



#include "dpu_writeback.h"



static int dpu_wb_conn_get_modes(struct drm_connector *connector)

{

	struct drm_device *dev = connector->dev;



	return drm_add_modes_noedid(connector, dev->mode_config.max_width,

			dev->mode_config.max_height);

}



static const struct drm_connector_funcs dpu_wb_conn_funcs = {

	.reset = drm_atomic_helper_connector_reset,

	.fill_modes = drm_helper_probe_single_connector_modes,

	.destroy = drm_connector_cleanup,

	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,

	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,

};



static int dpu_wb_conn_prepare_job(struct drm_writeback_connector *connector,

		struct drm_writeback_job *job)

{



	struct dpu_wb_connector *dpu_wb_conn = to_dpu_wb_conn(connector);



	if (!job->fb)

		return 0;



	dpu_encoder_prepare_wb_job(dpu_wb_conn->wb_enc, job);



	return 0;

}



static void dpu_wb_conn_cleanup_job(struct drm_writeback_connector *connector,

		struct drm_writeback_job *job)

{

	struct dpu_wb_connector *dpu_wb_conn = to_dpu_wb_conn(connector);



	if (!job->fb)

		return;



	dpu_encoder_cleanup_wb_job(dpu_wb_conn->wb_enc, job);

}



static const struct drm_connector_helper_funcs dpu_wb_conn_helper_funcs = {

	.get_modes = dpu_wb_conn_get_modes,

	.prepare_writeback_job = dpu_wb_conn_prepare_job,

	.cleanup_writeback_job = dpu_wb_conn_cleanup_job,

};



int dpu_writeback_init(struct drm_device *dev, struct drm_encoder *enc,

		const u32 *format_list, u32 num_formats)

{

	struct dpu_wb_connector *dpu_wb_conn;

	int rc = 0;



	dpu_wb_conn = devm_kzalloc(dev->dev, sizeof(*dpu_wb_conn), GFP_KERNEL);



	drm_connector_helper_add(&dpu_wb_conn->base.base, &dpu_wb_conn_helper_funcs);



	/* DPU initializes the encoder and sets it up completely for writeback

	 * cases and hence should use the new API drm_writeback_connector_init_with_encoder

	 * to initialize the writeback connector

	 */

	rc = drm_writeback_connector_init_with_encoder(dev, &dpu_wb_conn->base, enc,

			&dpu_wb_conn_funcs, format_list, num_formats);



	if (!rc)

		dpu_wb_conn->wb_enc = enc;



	return rc;

}

drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.h

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/* SPDX-License-Identifier: GPL-2.0-only */

/*

 * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.

 */



#ifndef _DPU_WRITEBACK_H

#define _DPU_WRITEBACK_H



#include <drm/drm_crtc.h>

#include <drm/drm_file.h>

#include <drm/drm_probe_helper.h>

#include <drm/drm_writeback.h>



#include "msm_drv.h"

#include "dpu_kms.h"

#include "dpu_encoder_phys.h"



struct dpu_wb_connector {

	struct drm_writeback_connector base;

	struct drm_encoder *wb_enc;

};



static inline struct dpu_wb_connector *to_dpu_wb_conn(struct drm_writeback_connector *conn)

{

	return container_of(conn, struct dpu_wb_connector, base);

}



int dpu_writeback_init(struct drm_device *dev, struct drm_encoder *enc,

		const u32 *format_list, u32 num_formats);



#endif /*_DPU_WRITEBACK_H */