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 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 return drm_add_modes_noedid(connector, dpu_kms->catalog->caps->max_linewidth, 15 dev->mode_config.max_height); 16 } 17 18 static const struct drm_connector_funcs dpu_wb_conn_funcs = { 19 .reset = drm_atomic_helper_connector_reset, 20 .fill_modes = drm_helper_probe_single_connector_modes, 21 .destroy = drm_connector_cleanup, 22 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 23 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 24 }; 25 26 static int dpu_wb_conn_prepare_job(struct drm_writeback_connector *connector, 27 struct drm_writeback_job *job) 28 { 29 30 struct dpu_wb_connector *dpu_wb_conn = to_dpu_wb_conn(connector); 31 32 if (!job->fb) 33 return 0; 34 35 dpu_encoder_prepare_wb_job(dpu_wb_conn->wb_enc, job); 36 37 return 0; 38 } 39 40 static void dpu_wb_conn_cleanup_job(struct drm_writeback_connector *connector, 41 struct drm_writeback_job *job) 42 { 43 struct dpu_wb_connector *dpu_wb_conn = to_dpu_wb_conn(connector); 44 45 if (!job->fb) 46 return; 47 48 dpu_encoder_cleanup_wb_job(dpu_wb_conn->wb_enc, job); 49 } 50 51 static const struct drm_connector_helper_funcs dpu_wb_conn_helper_funcs = { 52 .get_modes = dpu_wb_conn_get_modes, 53 .prepare_writeback_job = dpu_wb_conn_prepare_job, 54 .cleanup_writeback_job = dpu_wb_conn_cleanup_job, 55 }; 56 57 int dpu_writeback_init(struct drm_device *dev, struct drm_encoder *enc, 58 const u32 *format_list, u32 num_formats) 59 { 60 struct dpu_wb_connector *dpu_wb_conn; 61 int rc = 0; 62 63 dpu_wb_conn = devm_kzalloc(dev->dev, sizeof(*dpu_wb_conn), GFP_KERNEL); 64 65 drm_connector_helper_add(&dpu_wb_conn->base.base, &dpu_wb_conn_helper_funcs); 66 67 /* DPU initializes the encoder and sets it up completely for writeback 68 * cases and hence should use the new API drm_writeback_connector_init_with_encoder 69 * to initialize the writeback connector 70 */ 71 rc = drm_writeback_connector_init_with_encoder(dev, &dpu_wb_conn->base, enc, 72 &dpu_wb_conn_funcs, format_list, num_formats); 73 74 if (!rc) 75 dpu_wb_conn->wb_enc = enc; 76 77 return rc; 78 } 79