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 #include <drm/drm_managed.h> 9 10 #include "dpu_writeback.h" 11 12 static int dpu_wb_conn_get_modes(struct drm_connector *connector) 13 { 14 struct drm_device *dev = connector->dev; 15 struct msm_drm_private *priv = dev->dev_private; 16 struct dpu_kms *dpu_kms = to_dpu_kms(priv->kms); 17 18 /* 19 * We should ideally be limiting the modes only to the maxlinewidth but 20 * on some chipsets this will allow even 4k modes to be added which will 21 * fail the per SSPP bandwidth checks. So, till we have dual-SSPP support 22 * and source split support added lets limit the modes based on max_mixer_width 23 * as 4K modes can then be supported. 24 */ 25 return drm_add_modes_noedid(connector, dpu_kms->catalog->caps->max_mixer_width, 26 dev->mode_config.max_height); 27 } 28 29 static int dpu_wb_conn_atomic_check(struct drm_connector *connector, 30 struct drm_atomic_state *state) 31 { 32 struct drm_writeback_connector *wb_conn = drm_connector_to_writeback(connector); 33 struct dpu_wb_connector *dpu_wb_conn = to_dpu_wb_conn(wb_conn); 34 struct drm_connector_state *conn_state = 35 drm_atomic_get_new_connector_state(state, connector); 36 struct drm_crtc *crtc; 37 struct drm_crtc_state *crtc_state; 38 const struct drm_display_mode *mode; 39 struct drm_framebuffer *fb; 40 41 DPU_DEBUG("[atomic_check:%d]\n", connector->base.id); 42 43 if (!conn_state || !conn_state->connector) { 44 DPU_ERROR("invalid connector state\n"); 45 return -EINVAL; 46 } 47 48 crtc = conn_state->crtc; 49 if (!crtc) 50 return 0; 51 52 if (!conn_state->writeback_job || !conn_state->writeback_job->fb) 53 return 0; 54 55 crtc_state = drm_atomic_get_crtc_state(state, crtc); 56 if (IS_ERR(crtc_state)) 57 return PTR_ERR(crtc_state); 58 59 mode = &crtc_state->mode; 60 61 fb = conn_state->writeback_job->fb; 62 63 DPU_DEBUG("[fb_id:%u][fb:%u,%u][mode:\"%s\":%ux%u]\n", fb->base.id, fb->width, fb->height, 64 mode->name, mode->hdisplay, mode->vdisplay); 65 66 if (fb->width != mode->hdisplay) { 67 DPU_ERROR("invalid fb w=%d, mode w=%d\n", fb->width, mode->hdisplay); 68 return -EINVAL; 69 } else if (fb->height != mode->vdisplay) { 70 DPU_ERROR("invalid fb h=%d, mode h=%d\n", fb->height, mode->vdisplay); 71 return -EINVAL; 72 } else if (fb->width > dpu_wb_conn->maxlinewidth) { 73 DPU_ERROR("invalid fb w=%d, maxlinewidth=%u\n", 74 fb->width, dpu_wb_conn->maxlinewidth); 75 return -EINVAL; 76 } else if (fb->modifier != DRM_FORMAT_MOD_LINEAR) { 77 DPU_ERROR("unsupported fb modifier:%#llx\n", fb->modifier); 78 return -EINVAL; 79 } 80 81 return drm_atomic_helper_check_wb_connector_state(conn_state->connector, conn_state->state); 82 } 83 84 static const struct drm_connector_funcs dpu_wb_conn_funcs = { 85 .reset = drm_atomic_helper_connector_reset, 86 .fill_modes = drm_helper_probe_single_connector_modes, 87 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 88 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 89 }; 90 91 static int dpu_wb_conn_prepare_job(struct drm_writeback_connector *connector, 92 struct drm_writeback_job *job) 93 { 94 95 struct dpu_wb_connector *dpu_wb_conn = to_dpu_wb_conn(connector); 96 97 if (!job->fb) 98 return 0; 99 100 dpu_encoder_prepare_wb_job(dpu_wb_conn->wb_enc, job); 101 102 return 0; 103 } 104 105 static void dpu_wb_conn_cleanup_job(struct drm_writeback_connector *connector, 106 struct drm_writeback_job *job) 107 { 108 struct dpu_wb_connector *dpu_wb_conn = to_dpu_wb_conn(connector); 109 110 if (!job->fb) 111 return; 112 113 dpu_encoder_cleanup_wb_job(dpu_wb_conn->wb_enc, job); 114 } 115 116 static const struct drm_connector_helper_funcs dpu_wb_conn_helper_funcs = { 117 .get_modes = dpu_wb_conn_get_modes, 118 .atomic_check = dpu_wb_conn_atomic_check, 119 .prepare_writeback_job = dpu_wb_conn_prepare_job, 120 .cleanup_writeback_job = dpu_wb_conn_cleanup_job, 121 }; 122 123 int dpu_writeback_init(struct drm_device *dev, struct drm_encoder *enc, 124 const u32 *format_list, u32 num_formats, u32 maxlinewidth) 125 { 126 struct dpu_wb_connector *dpu_wb_conn; 127 int rc = 0; 128 129 dpu_wb_conn = drmm_kzalloc(dev, sizeof(*dpu_wb_conn), GFP_KERNEL); 130 if (!dpu_wb_conn) 131 return -ENOMEM; 132 133 dpu_wb_conn->maxlinewidth = maxlinewidth; 134 135 drm_connector_helper_add(&dpu_wb_conn->base.base, &dpu_wb_conn_helper_funcs); 136 137 rc = drmm_writeback_connector_init(dev, &dpu_wb_conn->base, 138 &dpu_wb_conn_funcs, enc, 139 format_list, num_formats); 140 141 if (!rc) 142 dpu_wb_conn->wb_enc = enc; 143 144 return rc; 145 } 146