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 #include <drm/drm_framebuffer.h> 8 9 #include "dpu_writeback.h" 10 11 static int dpu_wb_conn_get_modes(struct drm_connector *connector) 12 { 13 struct drm_device *dev = connector->dev; 14 struct msm_drm_private *priv = dev->dev_private; 15 struct dpu_kms *dpu_kms = to_dpu_kms(priv->kms); 16 17 /* 18 * We should ideally be limiting the modes only to the maxlinewidth but 19 * on some chipsets this will allow even 4k modes to be added which will 20 * fail the per SSPP bandwidth checks. So, till we have dual-SSPP support 21 * and source split support added lets limit the modes based on max_mixer_width 22 * as 4K modes can then be supported. 23 */ 24 return drm_add_modes_noedid(connector, dpu_kms->catalog->caps->max_mixer_width, 25 dev->mode_config.max_height); 26 } 27 28 static int dpu_wb_conn_atomic_check(struct drm_connector *connector, 29 struct drm_atomic_state *state) 30 { 31 struct drm_writeback_connector *wb_conn = drm_connector_to_writeback(connector); 32 struct dpu_wb_connector *dpu_wb_conn = to_dpu_wb_conn(wb_conn); 33 struct drm_connector_state *conn_state = 34 drm_atomic_get_new_connector_state(state, connector); 35 struct drm_crtc *crtc; 36 struct drm_crtc_state *crtc_state; 37 const struct drm_display_mode *mode; 38 struct drm_framebuffer *fb; 39 40 DPU_DEBUG("[atomic_check:%d]\n", connector->base.id); 41 42 if (!conn_state || !conn_state->connector) { 43 DPU_ERROR("invalid connector state\n"); 44 return -EINVAL; 45 } 46 47 crtc = conn_state->crtc; 48 if (!crtc) 49 return 0; 50 51 if (!conn_state->writeback_job || !conn_state->writeback_job->fb) 52 return 0; 53 54 crtc_state = drm_atomic_get_crtc_state(state, crtc); 55 if (IS_ERR(crtc_state)) 56 return PTR_ERR(crtc_state); 57 58 mode = &crtc_state->mode; 59 60 fb = conn_state->writeback_job->fb; 61 62 DPU_DEBUG("[fb_id:%u][fb:%u,%u][mode:\"%s\":%ux%u]\n", fb->base.id, fb->width, fb->height, 63 mode->name, mode->hdisplay, mode->vdisplay); 64 65 if (fb->width != mode->hdisplay) { 66 DPU_ERROR("invalid fb w=%d, mode w=%d\n", fb->width, mode->hdisplay); 67 return -EINVAL; 68 } else if (fb->height != mode->vdisplay) { 69 DPU_ERROR("invalid fb h=%d, mode h=%d\n", fb->height, mode->vdisplay); 70 return -EINVAL; 71 } else if (fb->width > dpu_wb_conn->maxlinewidth) { 72 DPU_ERROR("invalid fb w=%d, maxlinewidth=%u\n", 73 fb->width, dpu_wb_conn->maxlinewidth); 74 return -EINVAL; 75 } else if (fb->modifier != DRM_FORMAT_MOD_LINEAR) { 76 DPU_ERROR("unsupported fb modifier:%#llx\n", fb->modifier); 77 return -EINVAL; 78 } 79 80 return drm_atomic_helper_check_wb_connector_state(conn_state->connector, conn_state->state); 81 } 82 83 static const struct drm_connector_funcs dpu_wb_conn_funcs = { 84 .reset = drm_atomic_helper_connector_reset, 85 .fill_modes = drm_helper_probe_single_connector_modes, 86 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 87 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 88 }; 89 90 static int dpu_wb_conn_prepare_job(struct drm_writeback_connector *connector, 91 struct drm_writeback_job *job) 92 { 93 94 struct dpu_wb_connector *dpu_wb_conn = to_dpu_wb_conn(connector); 95 96 if (!job->fb) 97 return 0; 98 99 dpu_encoder_prepare_wb_job(dpu_wb_conn->wb_enc, job); 100 101 return 0; 102 } 103 104 static void dpu_wb_conn_cleanup_job(struct drm_writeback_connector *connector, 105 struct drm_writeback_job *job) 106 { 107 struct dpu_wb_connector *dpu_wb_conn = to_dpu_wb_conn(connector); 108 109 if (!job->fb) 110 return; 111 112 dpu_encoder_cleanup_wb_job(dpu_wb_conn->wb_enc, job); 113 } 114 115 static const struct drm_connector_helper_funcs dpu_wb_conn_helper_funcs = { 116 .get_modes = dpu_wb_conn_get_modes, 117 .atomic_check = dpu_wb_conn_atomic_check, 118 .prepare_writeback_job = dpu_wb_conn_prepare_job, 119 .cleanup_writeback_job = dpu_wb_conn_cleanup_job, 120 }; 121 122 int dpu_writeback_init(struct drm_device *dev, struct drm_encoder *enc, 123 const u32 *format_list, u32 num_formats, u32 maxlinewidth) 124 { 125 struct dpu_wb_connector *dpu_wb_conn; 126 int rc = 0; 127 128 dpu_wb_conn = devm_kzalloc(dev->dev, sizeof(*dpu_wb_conn), GFP_KERNEL); 129 if (!dpu_wb_conn) 130 return -ENOMEM; 131 132 dpu_wb_conn->maxlinewidth = maxlinewidth; 133 134 drm_connector_helper_add(&dpu_wb_conn->base.base, &dpu_wb_conn_helper_funcs); 135 136 rc = drmm_writeback_connector_init(dev, &dpu_wb_conn->base, 137 &dpu_wb_conn_funcs, enc, 138 format_list, num_formats); 139 140 if (!rc) 141 dpu_wb_conn->wb_enc = enc; 142 143 return rc; 144 } 145