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
dpu_wb_conn_get_modes(struct drm_connector * connector)10 static 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
27 static 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
dpu_wb_conn_prepare_job(struct drm_writeback_connector * connector,struct drm_writeback_job * job)35 static 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
dpu_wb_conn_cleanup_job(struct drm_writeback_connector * connector,struct drm_writeback_job * job)49 static 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
60 static 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
dpu_writeback_init(struct drm_device * dev,struct drm_encoder * enc,const u32 * format_list,u32 num_formats)66 int 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 if (!dpu_wb_conn)
74 return -ENOMEM;
75
76 drm_connector_helper_add(&dpu_wb_conn->base.base, &dpu_wb_conn_helper_funcs);
77
78 /* DPU initializes the encoder and sets it up completely for writeback
79 * cases and hence should use the new API drm_writeback_connector_init_with_encoder
80 * to initialize the writeback connector
81 */
82 rc = drm_writeback_connector_init_with_encoder(dev, &dpu_wb_conn->base, enc,
83 &dpu_wb_conn_funcs, format_list, num_formats);
84
85 if (!rc)
86 dpu_wb_conn->wb_enc = enc;
87
88 return rc;
89 }
90