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

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.comSigned-off-by: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
parent d7d0e73f
......@@ -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 \
......
// 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;
}
/* 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 */
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