1/* 2 * Copyright (C) 2012 Red Hat 3 * based in parts on udlfb.c: 4 * Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it> 5 * Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com> 6 * Copyright (C) 2009 Bernie Thompson <bernie@plugable.com> 7 * 8 * This file is subject to the terms and conditions of the GNU General Public 9 * License v2. See the file COPYING in the main directory of this archive for 10 * more details. 11 */ 12 13#include <drm/drmP.h> 14#include <drm/drm_crtc.h> 15#include <drm/drm_crtc_helper.h> 16#include "udl_drv.h" 17 18/* dummy encoder */ 19static void udl_enc_destroy(struct drm_encoder *encoder) 20{ 21 drm_encoder_cleanup(encoder); 22 kfree(encoder); 23} 24 25static void udl_encoder_disable(struct drm_encoder *encoder) 26{ 27} 28 29static bool udl_mode_fixup(struct drm_encoder *encoder, 30 const struct drm_display_mode *mode, 31 struct drm_display_mode *adjusted_mode) 32{ 33 return true; 34} 35 36static void udl_encoder_prepare(struct drm_encoder *encoder) 37{ 38} 39 40static void udl_encoder_commit(struct drm_encoder *encoder) 41{ 42} 43 44static void udl_encoder_mode_set(struct drm_encoder *encoder, 45 struct drm_display_mode *mode, 46 struct drm_display_mode *adjusted_mode) 47{ 48} 49 50static void 51udl_encoder_dpms(struct drm_encoder *encoder, int mode) 52{ 53} 54 55static const struct drm_encoder_helper_funcs udl_helper_funcs = { 56 .dpms = udl_encoder_dpms, 57 .mode_fixup = udl_mode_fixup, 58 .prepare = udl_encoder_prepare, 59 .mode_set = udl_encoder_mode_set, 60 .commit = udl_encoder_commit, 61 .disable = udl_encoder_disable, 62}; 63 64static const struct drm_encoder_funcs udl_enc_funcs = { 65 .destroy = udl_enc_destroy, 66}; 67 68struct drm_encoder *udl_encoder_init(struct drm_device *dev) 69{ 70 struct drm_encoder *encoder; 71 72 encoder = kzalloc(sizeof(struct drm_encoder), GFP_KERNEL); 73 if (!encoder) 74 return NULL; 75 76 drm_encoder_init(dev, encoder, &udl_enc_funcs, DRM_MODE_ENCODER_TMDS); 77 drm_encoder_helper_add(encoder, &udl_helper_funcs); 78 encoder->possible_crtcs = 1; 79 return encoder; 80} 81