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