komeda_wb_connector.c

  1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
  4 * Author: James.Qian.Wang <james.qian.wang@arm.com>
  5 *
  6 */
  7#include <drm/drm_framebuffer.h>
  8#include "komeda_dev.h"
  9#include "komeda_kms.h"
 10
 11static int
 12komeda_wb_init_data_flow(struct komeda_layer *wb_layer,
 13			 struct drm_connector_state *conn_st,
 14			 struct komeda_crtc_state *kcrtc_st,
 15			 struct komeda_data_flow_cfg *dflow)
 16{
 17	struct drm_framebuffer *fb = conn_st->writeback_job->fb;
 18
 19	memset(dflow, 0, sizeof(*dflow));
 20
 21	dflow->out_w = fb->width;
 22	dflow->out_h = fb->height;
 23
 24	/* the write back data comes from the compiz */
 25	pipeline_composition_size(kcrtc_st, &dflow->in_w, &dflow->in_h);
 26	dflow->input.component = &wb_layer->base.pipeline->compiz->base;
 27	/* compiz doesn't output alpha */
 28	dflow->pixel_blend_mode = DRM_MODE_BLEND_PIXEL_NONE;
 29	dflow->rot = DRM_MODE_ROTATE_0;
 30
 31	komeda_complete_data_flow_cfg(wb_layer, dflow, fb);
 32
 33	return 0;
 34}
 35
 36static int
 37komeda_wb_encoder_atomic_check(struct drm_encoder *encoder,
 38			       struct drm_crtc_state *crtc_st,
 39			       struct drm_connector_state *conn_st)
 40{
 41	struct komeda_crtc_state *kcrtc_st = to_kcrtc_st(crtc_st);
 42	struct drm_writeback_job *writeback_job = conn_st->writeback_job;
 43	struct komeda_layer *wb_layer;
 44	struct komeda_data_flow_cfg dflow;
 45	int err;
 46
 47	if (!writeback_job)
 48		return 0;
 49
 50	if (!crtc_st->active) {
 51		DRM_DEBUG_ATOMIC("Cannot write the composition result out on a inactive CRTC.\n");
 52		return -EINVAL;
 53	}
 54
 55	wb_layer = to_kconn(to_wb_conn(conn_st->connector))->wb_layer;
 56
 57	/*
 58	 * No need for a full modested when the only connector changed is the
 59	 * writeback connector.
 60	 */
 61	if (crtc_st->connectors_changed &&
 62	    is_only_changed_connector(crtc_st, conn_st->connector))
 63		crtc_st->connectors_changed = false;
 64
 65	err = komeda_wb_init_data_flow(wb_layer, conn_st, kcrtc_st, &dflow);
 66	if (err)
 67		return err;
 68
 69	if (dflow.en_split)
 70		err = komeda_build_wb_split_data_flow(wb_layer,
 71				conn_st, kcrtc_st, &dflow);
 72	else
 73		err = komeda_build_wb_data_flow(wb_layer,
 74				conn_st, kcrtc_st, &dflow);
 75
 76	return err;
 77}
 78
 79static const struct drm_encoder_helper_funcs komeda_wb_encoder_helper_funcs = {
 80	.atomic_check = komeda_wb_encoder_atomic_check,
 81};
 82
 83static int
 84komeda_wb_connector_get_modes(struct drm_connector *connector)
 85{
 86	return 0;
 87}
 88
 89static enum drm_mode_status
 90komeda_wb_connector_mode_valid(struct drm_connector *connector,
 91			       const struct drm_display_mode *mode)
 92{
 93	struct drm_device *dev = connector->dev;
 94	struct drm_mode_config *mode_config = &dev->mode_config;
 95	int w = mode->hdisplay, h = mode->vdisplay;
 96
 97	if ((w < mode_config->min_width) || (w > mode_config->max_width))
 98		return MODE_BAD_HVALUE;
 99
100	if ((h < mode_config->min_height) || (h > mode_config->max_height))
101		return MODE_BAD_VVALUE;
102
103	return MODE_OK;
104}
105
106static const struct drm_connector_helper_funcs komeda_wb_conn_helper_funcs = {
107	.get_modes	= komeda_wb_connector_get_modes,
108	.mode_valid	= komeda_wb_connector_mode_valid,
109};
110
111static enum drm_connector_status
112komeda_wb_connector_detect(struct drm_connector *connector, bool force)
113{
114	return connector_status_connected;
115}
116
117static int
118komeda_wb_connector_fill_modes(struct drm_connector *connector,
119			       uint32_t maxX, uint32_t maxY)
120{
121	return 0;
122}
123
124static void komeda_wb_connector_destroy(struct drm_connector *connector)
125{
126	drm_connector_cleanup(connector);
127	kfree(to_kconn(to_wb_conn(connector)));
128}
129
130static const struct drm_connector_funcs komeda_wb_connector_funcs = {
131	.reset			= drm_atomic_helper_connector_reset,
132	.detect			= komeda_wb_connector_detect,
133	.fill_modes		= komeda_wb_connector_fill_modes,
134	.destroy		= komeda_wb_connector_destroy,
135	.atomic_duplicate_state	= drm_atomic_helper_connector_duplicate_state,
136	.atomic_destroy_state	= drm_atomic_helper_connector_destroy_state,
137};
138
139static int komeda_wb_connector_add(struct komeda_kms_dev *kms,
140				   struct komeda_crtc *kcrtc)
141{
142	struct komeda_dev *mdev = kms->base.dev_private;
143	struct komeda_wb_connector *kwb_conn;
144	struct drm_writeback_connector *wb_conn;
145	struct drm_display_info *info;
146	u32 *formats, n_formats = 0;
147	int err;
148
149	if (!kcrtc->master->wb_layer)
150		return 0;
151
152	kwb_conn = kzalloc(sizeof(*kwb_conn), GFP_KERNEL);
153	if (!kwb_conn)
154		return -ENOMEM;
155
156	kwb_conn->wb_layer = kcrtc->master->wb_layer;
157
158	wb_conn = &kwb_conn->base;
159
160	formats = komeda_get_layer_fourcc_list(&mdev->fmt_tbl,
161					       kwb_conn->wb_layer->layer_type,
162					       &n_formats);
163	if (!formats) {
164		kfree(kwb_conn);
165		return -ENOMEM;
166	}
167
168	err = drm_writeback_connector_init(&kms->base, wb_conn,
169					   &komeda_wb_connector_funcs,
170					   &komeda_wb_encoder_helper_funcs,
171					   formats, n_formats,
172					   BIT(drm_crtc_index(&kcrtc->base)));
173	komeda_put_fourcc_list(formats);
174	if (err) {
175		kfree(kwb_conn);
176		return err;
177	}
178
179	drm_connector_helper_add(&wb_conn->base, &komeda_wb_conn_helper_funcs);
180
181	info = &kwb_conn->base.base.display_info;
182	info->bpc = __fls(kcrtc->master->improc->supported_color_depths);
183	info->color_formats = kcrtc->master->improc->supported_color_formats;
184
185	kcrtc->wb_conn = kwb_conn;
186
187	return 0;
188}
189
190int komeda_kms_add_wb_connectors(struct komeda_kms_dev *kms,
191				 struct komeda_dev *mdev)
192{
193	int i, err;
194
195	for (i = 0; i < kms->n_crtcs; i++) {
196		err = komeda_wb_connector_add(kms, &kms->crtcs[i]);
197		if (err)
198			return err;
199	}
200
201	return 0;
202}