1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
4*4882a593Smuzhiyun * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #include <linux/export.h>
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <drm/drm_crtc.h>
10*4882a593Smuzhiyun #include <drm/drm_crtc_helper.h>
11*4882a593Smuzhiyun #include <drm/drm_panel.h>
12*4882a593Smuzhiyun #include <drm/drm_of.h>
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun #include "tidss_crtc.h"
15*4882a593Smuzhiyun #include "tidss_drv.h"
16*4882a593Smuzhiyun #include "tidss_encoder.h"
17*4882a593Smuzhiyun
tidss_encoder_atomic_check(struct drm_encoder * encoder,struct drm_crtc_state * crtc_state,struct drm_connector_state * conn_state)18*4882a593Smuzhiyun static int tidss_encoder_atomic_check(struct drm_encoder *encoder,
19*4882a593Smuzhiyun struct drm_crtc_state *crtc_state,
20*4882a593Smuzhiyun struct drm_connector_state *conn_state)
21*4882a593Smuzhiyun {
22*4882a593Smuzhiyun struct drm_device *ddev = encoder->dev;
23*4882a593Smuzhiyun struct tidss_crtc_state *tcrtc_state = to_tidss_crtc_state(crtc_state);
24*4882a593Smuzhiyun struct drm_display_info *di = &conn_state->connector->display_info;
25*4882a593Smuzhiyun struct drm_bridge *bridge;
26*4882a593Smuzhiyun bool bus_flags_set = false;
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun dev_dbg(ddev->dev, "%s\n", __func__);
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun /*
31*4882a593Smuzhiyun * Take the bus_flags from the first bridge that defines
32*4882a593Smuzhiyun * bridge timings, or from the connector's display_info if no
33*4882a593Smuzhiyun * bridge defines the timings.
34*4882a593Smuzhiyun */
35*4882a593Smuzhiyun drm_for_each_bridge_in_chain(encoder, bridge) {
36*4882a593Smuzhiyun if (!bridge->timings)
37*4882a593Smuzhiyun continue;
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun tcrtc_state->bus_flags = bridge->timings->input_bus_flags;
40*4882a593Smuzhiyun bus_flags_set = true;
41*4882a593Smuzhiyun break;
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun if (!di->bus_formats || di->num_bus_formats == 0) {
45*4882a593Smuzhiyun dev_err(ddev->dev, "%s: No bus_formats in connected display\n",
46*4882a593Smuzhiyun __func__);
47*4882a593Smuzhiyun return -EINVAL;
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun // XXX any cleaner way to set bus format and flags?
51*4882a593Smuzhiyun tcrtc_state->bus_format = di->bus_formats[0];
52*4882a593Smuzhiyun if (!bus_flags_set)
53*4882a593Smuzhiyun tcrtc_state->bus_flags = di->bus_flags;
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun return 0;
56*4882a593Smuzhiyun }
57*4882a593Smuzhiyun
tidss_encoder_destroy(struct drm_encoder * encoder)58*4882a593Smuzhiyun static void tidss_encoder_destroy(struct drm_encoder *encoder)
59*4882a593Smuzhiyun {
60*4882a593Smuzhiyun drm_encoder_cleanup(encoder);
61*4882a593Smuzhiyun kfree(encoder);
62*4882a593Smuzhiyun }
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
65*4882a593Smuzhiyun .atomic_check = tidss_encoder_atomic_check,
66*4882a593Smuzhiyun };
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun static const struct drm_encoder_funcs encoder_funcs = {
69*4882a593Smuzhiyun .destroy = tidss_encoder_destroy,
70*4882a593Smuzhiyun };
71*4882a593Smuzhiyun
tidss_encoder_create(struct tidss_device * tidss,u32 encoder_type,u32 possible_crtcs)72*4882a593Smuzhiyun struct drm_encoder *tidss_encoder_create(struct tidss_device *tidss,
73*4882a593Smuzhiyun u32 encoder_type, u32 possible_crtcs)
74*4882a593Smuzhiyun {
75*4882a593Smuzhiyun struct drm_encoder *enc;
76*4882a593Smuzhiyun int ret;
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun enc = kzalloc(sizeof(*enc), GFP_KERNEL);
79*4882a593Smuzhiyun if (!enc)
80*4882a593Smuzhiyun return ERR_PTR(-ENOMEM);
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun enc->possible_crtcs = possible_crtcs;
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun ret = drm_encoder_init(&tidss->ddev, enc, &encoder_funcs,
85*4882a593Smuzhiyun encoder_type, NULL);
86*4882a593Smuzhiyun if (ret < 0) {
87*4882a593Smuzhiyun kfree(enc);
88*4882a593Smuzhiyun return ERR_PTR(ret);
89*4882a593Smuzhiyun }
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun drm_encoder_helper_add(enc, &encoder_helper_funcs);
92*4882a593Smuzhiyun
93*4882a593Smuzhiyun dev_dbg(tidss->dev, "Encoder create done\n");
94*4882a593Smuzhiyun
95*4882a593Smuzhiyun return enc;
96*4882a593Smuzhiyun }
97