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 /* 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 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 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 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