1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
 4 */
 5
 6#include <drm/drm_edid.h>
 7
 8#include "dpu_writeback.h"
 9
10static int dpu_wb_conn_get_modes(struct drm_connector *connector)
11{
12	struct drm_device *dev = connector->dev;
13	struct msm_drm_private *priv = dev->dev_private;
14	struct dpu_kms *dpu_kms = to_dpu_kms(priv->kms);
15
16	/*
17	 * We should ideally be limiting the modes only to the maxlinewidth but
18	 * on some chipsets this will allow even 4k modes to be added which will
19	 * fail the per SSPP bandwidth checks. So, till we have dual-SSPP support
20	 * and source split support added lets limit the modes based on max_mixer_width
21	 * as 4K modes can then be supported.
22	 */
23	return drm_add_modes_noedid(connector, dpu_kms->catalog->caps->max_mixer_width,
24			dev->mode_config.max_height);
25}
26
27static const struct drm_connector_funcs dpu_wb_conn_funcs = {
28	.reset = drm_atomic_helper_connector_reset,
29	.fill_modes = drm_helper_probe_single_connector_modes,
30	.destroy = drm_connector_cleanup,
31	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
32	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
33};
34
35static int dpu_wb_conn_prepare_job(struct drm_writeback_connector *connector,
36		struct drm_writeback_job *job)
37{
38
39	struct dpu_wb_connector *dpu_wb_conn = to_dpu_wb_conn(connector);
40
41	if (!job->fb)
42		return 0;
43
44	dpu_encoder_prepare_wb_job(dpu_wb_conn->wb_enc, job);
45
46	return 0;
47}
48
49static void dpu_wb_conn_cleanup_job(struct drm_writeback_connector *connector,
50		struct drm_writeback_job *job)
51{
52	struct dpu_wb_connector *dpu_wb_conn = to_dpu_wb_conn(connector);
53
54	if (!job->fb)
55		return;
56
57	dpu_encoder_cleanup_wb_job(dpu_wb_conn->wb_enc, job);
58}
59
60static const struct drm_connector_helper_funcs dpu_wb_conn_helper_funcs = {
61	.get_modes = dpu_wb_conn_get_modes,
62	.prepare_writeback_job = dpu_wb_conn_prepare_job,
63	.cleanup_writeback_job = dpu_wb_conn_cleanup_job,
64};
65
66int dpu_writeback_init(struct drm_device *dev, struct drm_encoder *enc,
67		const u32 *format_list, u32 num_formats)
68{
69	struct dpu_wb_connector *dpu_wb_conn;
70	int rc = 0;
71
72	dpu_wb_conn = devm_kzalloc(dev->dev, sizeof(*dpu_wb_conn), GFP_KERNEL);
73
74	drm_connector_helper_add(&dpu_wb_conn->base.base, &dpu_wb_conn_helper_funcs);
75
76	/* DPU initializes the encoder and sets it up completely for writeback
77	 * cases and hence should use the new API drm_writeback_connector_init_with_encoder
78	 * to initialize the writeback connector
79	 */
80	rc = drm_writeback_connector_init_with_encoder(dev, &dpu_wb_conn->base, enc,
81			&dpu_wb_conn_funcs, format_list, num_formats);
82
83	if (!rc)
84		dpu_wb_conn->wb_enc = enc;
85
86	return rc;
87}