1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2019-2022 Bootlin 4 * Author: Paul Kocialkowski <paul.kocialkowski@bootlin.com> 5 */ 6 7 #include <linux/types.h> 8 9 #include <drm/drm_atomic.h> 10 #include <drm/drm_atomic_helper.h> 11 #include <drm/drm_crtc_helper.h> 12 #include <drm/drm_drv.h> 13 #include <drm/drm_fb_helper.h> 14 #include <drm/drm_gem_dma_helper.h> 15 #include <drm/drm_gem_framebuffer_helper.h> 16 #include <drm/drm_mode_config.h> 17 #include <drm/drm_panel.h> 18 #include <drm/drm_print.h> 19 #include <drm/drm_probe_helper.h> 20 #include <drm/drm_vblank.h> 21 22 #include "logicvc_drm.h" 23 #include "logicvc_interface.h" 24 #include "logicvc_layer.h" 25 #include "logicvc_mode.h" 26 27 static const struct drm_mode_config_funcs logicvc_mode_config_funcs = { 28 .fb_create = drm_gem_fb_create, 29 .output_poll_changed = drm_fb_helper_output_poll_changed, 30 .atomic_check = drm_atomic_helper_check, 31 .atomic_commit = drm_atomic_helper_commit, 32 }; 33 34 int logicvc_mode_init(struct logicvc_drm *logicvc) 35 { 36 struct drm_device *drm_dev = &logicvc->drm_dev; 37 struct drm_mode_config *mode_config = &drm_dev->mode_config; 38 struct logicvc_layer *layer_primary; 39 uint32_t preferred_depth; 40 int ret; 41 42 ret = drm_vblank_init(drm_dev, mode_config->num_crtc); 43 if (ret) { 44 drm_err(drm_dev, "Failed to initialize vblank\n"); 45 return ret; 46 } 47 48 layer_primary = logicvc_layer_get_primary(logicvc); 49 if (!layer_primary) { 50 drm_err(drm_dev, "Failed to get primary layer\n"); 51 return -EINVAL; 52 } 53 54 preferred_depth = layer_primary->formats->depth; 55 56 /* DRM counts alpha in depth, our driver doesn't. */ 57 if (layer_primary->formats->alpha) 58 preferred_depth += 8; 59 60 mode_config->min_width = 64; 61 mode_config->max_width = 2048; 62 mode_config->min_height = 1; 63 mode_config->max_height = 2048; 64 mode_config->preferred_depth = preferred_depth; 65 mode_config->funcs = &logicvc_mode_config_funcs; 66 67 drm_mode_config_reset(drm_dev); 68 69 drm_kms_helper_poll_init(drm_dev); 70 71 return 0; 72 } 73 74 void logicvc_mode_fini(struct logicvc_drm *logicvc) 75 { 76 struct drm_device *drm_dev = &logicvc->drm_dev; 77 78 drm_kms_helper_poll_fini(drm_dev); 79 } 80