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 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 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 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 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