1b7c7436aSJernej Skrabec // SPDX-License-Identifier: GPL-2.0+
2b7c7436aSJernej Skrabec /*
3b7c7436aSJernej Skrabec * Copyright (c) 2018 Jernej Skrabec <jernej.skrabec@siol.net>
4b7c7436aSJernej Skrabec */
5b7c7436aSJernej Skrabec
6b7c7436aSJernej Skrabec #include <linux/component.h>
7b7c7436aSJernej Skrabec #include <linux/module.h>
8*722d4f06SRob Herring #include <linux/of.h>
9b7c7436aSJernej Skrabec #include <linux/platform_device.h>
10b7c7436aSJernej Skrabec
117fe3ead7SThomas Zimmermann #include <drm/drm_modeset_helper_vtables.h>
129c25a297SSam Ravnborg #include <drm/drm_of.h>
13f9f3a38dSThomas Zimmermann #include <drm/drm_simple_kms_helper.h>
14b7c7436aSJernej Skrabec
15b7c7436aSJernej Skrabec #include "sun8i_dw_hdmi.h"
1657e23de0SJernej Skrabec #include "sun8i_tcon_top.h"
17b7c7436aSJernej Skrabec
sun8i_dw_hdmi_encoder_mode_set(struct drm_encoder * encoder,struct drm_display_mode * mode,struct drm_display_mode * adj_mode)18b7c7436aSJernej Skrabec static void sun8i_dw_hdmi_encoder_mode_set(struct drm_encoder *encoder,
19b7c7436aSJernej Skrabec struct drm_display_mode *mode,
20b7c7436aSJernej Skrabec struct drm_display_mode *adj_mode)
21b7c7436aSJernej Skrabec {
22b7c7436aSJernej Skrabec struct sun8i_dw_hdmi *hdmi = encoder_to_sun8i_dw_hdmi(encoder);
23b7c7436aSJernej Skrabec
24b7c7436aSJernej Skrabec clk_set_rate(hdmi->clk_tmds, mode->crtc_clock * 1000);
25b7c7436aSJernej Skrabec }
26b7c7436aSJernej Skrabec
27b7c7436aSJernej Skrabec static const struct drm_encoder_helper_funcs
28b7c7436aSJernej Skrabec sun8i_dw_hdmi_encoder_helper_funcs = {
29b7c7436aSJernej Skrabec .mode_set = sun8i_dw_hdmi_encoder_mode_set,
30b7c7436aSJernej Skrabec };
31b7c7436aSJernej Skrabec
32b7c7436aSJernej Skrabec static enum drm_mode_status
sun8i_dw_hdmi_mode_valid_a83t(struct dw_hdmi * hdmi,void * data,const struct drm_display_info * info,const struct drm_display_mode * mode)3396591a4bSLaurent Pinchart sun8i_dw_hdmi_mode_valid_a83t(struct dw_hdmi *hdmi, void *data,
34af05bba0SLaurent Pinchart const struct drm_display_info *info,
35b7c7436aSJernej Skrabec const struct drm_display_mode *mode)
36b7c7436aSJernej Skrabec {
37b7c7436aSJernej Skrabec if (mode->clock > 297000)
38b7c7436aSJernej Skrabec return MODE_CLOCK_HIGH;
39b7c7436aSJernej Skrabec
40b7c7436aSJernej Skrabec return MODE_OK;
41b7c7436aSJernej Skrabec }
42b7c7436aSJernej Skrabec
4340bb9d31SJernej Skrabec static enum drm_mode_status
sun8i_dw_hdmi_mode_valid_h6(struct dw_hdmi * hdmi,void * data,const struct drm_display_info * info,const struct drm_display_mode * mode)4496591a4bSLaurent Pinchart sun8i_dw_hdmi_mode_valid_h6(struct dw_hdmi *hdmi, void *data,
45af05bba0SLaurent Pinchart const struct drm_display_info *info,
4640bb9d31SJernej Skrabec const struct drm_display_mode *mode)
4740bb9d31SJernej Skrabec {
48cd906375SJernej Skrabec /*
49cd906375SJernej Skrabec * Controller support maximum of 594 MHz, which correlates to
501926a050SJernej Skrabec * 4K@60Hz 4:4:4 or RGB.
51cd906375SJernej Skrabec */
521926a050SJernej Skrabec if (mode->clock > 594000)
5340bb9d31SJernej Skrabec return MODE_CLOCK_HIGH;
5440bb9d31SJernej Skrabec
5540bb9d31SJernej Skrabec return MODE_OK;
5640bb9d31SJernej Skrabec }
5740bb9d31SJernej Skrabec
sun8i_dw_hdmi_node_is_tcon_top(struct device_node * node)5857e23de0SJernej Skrabec static bool sun8i_dw_hdmi_node_is_tcon_top(struct device_node *node)
5957e23de0SJernej Skrabec {
6058d4d298SArnd Bergmann return IS_ENABLED(CONFIG_DRM_SUN8I_TCON_TOP) &&
6158d4d298SArnd Bergmann !!of_match_node(sun8i_tcon_top_of_table, node);
6257e23de0SJernej Skrabec }
6357e23de0SJernej Skrabec
sun8i_dw_hdmi_find_possible_crtcs(struct drm_device * drm,struct device_node * node)6457e23de0SJernej Skrabec static u32 sun8i_dw_hdmi_find_possible_crtcs(struct drm_device *drm,
6557e23de0SJernej Skrabec struct device_node *node)
6657e23de0SJernej Skrabec {
6757e23de0SJernej Skrabec struct device_node *port, *ep, *remote, *remote_port;
6857e23de0SJernej Skrabec u32 crtcs = 0;
6957e23de0SJernej Skrabec
704a068c5cSJernej Skrabec remote = of_graph_get_remote_node(node, 0, -1);
7157e23de0SJernej Skrabec if (!remote)
7257e23de0SJernej Skrabec return 0;
7357e23de0SJernej Skrabec
7457e23de0SJernej Skrabec if (sun8i_dw_hdmi_node_is_tcon_top(remote)) {
7557e23de0SJernej Skrabec port = of_graph_get_port_by_id(remote, 4);
7657e23de0SJernej Skrabec if (!port)
774a068c5cSJernej Skrabec goto crtcs_exit;
7857e23de0SJernej Skrabec
7957e23de0SJernej Skrabec for_each_child_of_node(port, ep) {
8057e23de0SJernej Skrabec remote_port = of_graph_get_remote_port(ep);
8157e23de0SJernej Skrabec if (remote_port) {
8257e23de0SJernej Skrabec crtcs |= drm_of_crtc_port_mask(drm, remote_port);
8357e23de0SJernej Skrabec of_node_put(remote_port);
8457e23de0SJernej Skrabec }
8557e23de0SJernej Skrabec }
8657e23de0SJernej Skrabec } else {
8757e23de0SJernej Skrabec crtcs = drm_of_find_possible_crtcs(drm, node);
8857e23de0SJernej Skrabec }
8957e23de0SJernej Skrabec
904a068c5cSJernej Skrabec crtcs_exit:
914a068c5cSJernej Skrabec of_node_put(remote);
924a068c5cSJernej Skrabec
9357e23de0SJernej Skrabec return crtcs;
9457e23de0SJernej Skrabec }
9557e23de0SJernej Skrabec
sun8i_dw_hdmi_bind(struct device * dev,struct device * master,void * data)96b7c7436aSJernej Skrabec static int sun8i_dw_hdmi_bind(struct device *dev, struct device *master,
97b7c7436aSJernej Skrabec void *data)
98b7c7436aSJernej Skrabec {
9992016904SSamuel Holland struct platform_device *pdev = to_platform_device(dev);
100b7c7436aSJernej Skrabec struct dw_hdmi_plat_data *plat_data;
101b7c7436aSJernej Skrabec struct drm_device *drm = data;
102b7c7436aSJernej Skrabec struct device_node *phy_node;
103b7c7436aSJernej Skrabec struct drm_encoder *encoder;
104b7c7436aSJernej Skrabec struct sun8i_dw_hdmi *hdmi;
105b7c7436aSJernej Skrabec int ret;
106b7c7436aSJernej Skrabec
107b7c7436aSJernej Skrabec if (!pdev->dev.of_node)
108b7c7436aSJernej Skrabec return -ENODEV;
109b7c7436aSJernej Skrabec
110b7c7436aSJernej Skrabec hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
111b7c7436aSJernej Skrabec if (!hdmi)
112b7c7436aSJernej Skrabec return -ENOMEM;
113b7c7436aSJernej Skrabec
114b7c7436aSJernej Skrabec plat_data = &hdmi->plat_data;
115b7c7436aSJernej Skrabec hdmi->dev = &pdev->dev;
116b7c7436aSJernej Skrabec encoder = &hdmi->encoder;
117b7c7436aSJernej Skrabec
11879971521SJernej Skrabec hdmi->quirks = of_device_get_match_data(dev);
11979971521SJernej Skrabec
12057e23de0SJernej Skrabec encoder->possible_crtcs =
12157e23de0SJernej Skrabec sun8i_dw_hdmi_find_possible_crtcs(drm, dev->of_node);
122b7c7436aSJernej Skrabec /*
123b7c7436aSJernej Skrabec * If we failed to find the CRTC(s) which this encoder is
124b7c7436aSJernej Skrabec * supposed to be connected to, it's because the CRTC has
125b7c7436aSJernej Skrabec * not been registered yet. Defer probing, and hope that
126b7c7436aSJernej Skrabec * the required CRTC is added later.
127b7c7436aSJernej Skrabec */
128b7c7436aSJernej Skrabec if (encoder->possible_crtcs == 0)
129b7c7436aSJernej Skrabec return -EPROBE_DEFER;
130b7c7436aSJernej Skrabec
131b7c7436aSJernej Skrabec hdmi->rst_ctrl = devm_reset_control_get(dev, "ctrl");
13291241ee2SCai Huoqing if (IS_ERR(hdmi->rst_ctrl))
13391241ee2SCai Huoqing return dev_err_probe(dev, PTR_ERR(hdmi->rst_ctrl),
13491241ee2SCai Huoqing "Could not get ctrl reset control\n");
135b7c7436aSJernej Skrabec
136b7c7436aSJernej Skrabec hdmi->clk_tmds = devm_clk_get(dev, "tmds");
13791241ee2SCai Huoqing if (IS_ERR(hdmi->clk_tmds))
13891241ee2SCai Huoqing return dev_err_probe(dev, PTR_ERR(hdmi->clk_tmds),
13991241ee2SCai Huoqing "Couldn't get the tmds clock\n");
140b7c7436aSJernej Skrabec
141633ba1e0SJernej Skrabec hdmi->regulator = devm_regulator_get(dev, "hvcc");
14291241ee2SCai Huoqing if (IS_ERR(hdmi->regulator))
14391241ee2SCai Huoqing return dev_err_probe(dev, PTR_ERR(hdmi->regulator),
14491241ee2SCai Huoqing "Couldn't get regulator\n");
145633ba1e0SJernej Skrabec
146633ba1e0SJernej Skrabec ret = regulator_enable(hdmi->regulator);
147633ba1e0SJernej Skrabec if (ret) {
148633ba1e0SJernej Skrabec dev_err(dev, "Failed to enable regulator\n");
14992016904SSamuel Holland return ret;
150633ba1e0SJernej Skrabec }
151633ba1e0SJernej Skrabec
152b7c7436aSJernej Skrabec ret = reset_control_deassert(hdmi->rst_ctrl);
153b7c7436aSJernej Skrabec if (ret) {
154b7c7436aSJernej Skrabec dev_err(dev, "Could not deassert ctrl reset control\n");
15592016904SSamuel Holland goto err_disable_regulator;
156b7c7436aSJernej Skrabec }
157b7c7436aSJernej Skrabec
158b7c7436aSJernej Skrabec ret = clk_prepare_enable(hdmi->clk_tmds);
159b7c7436aSJernej Skrabec if (ret) {
160b7c7436aSJernej Skrabec dev_err(dev, "Could not enable tmds clock\n");
161b7c7436aSJernej Skrabec goto err_assert_ctrl_reset;
162b7c7436aSJernej Skrabec }
163b7c7436aSJernej Skrabec
164b7c7436aSJernej Skrabec phy_node = of_parse_phandle(dev->of_node, "phys", 0);
165b7c7436aSJernej Skrabec if (!phy_node) {
166b7c7436aSJernej Skrabec dev_err(dev, "Can't found PHY phandle\n");
1676654b578SXiongfeng Wang ret = -EINVAL;
168b7c7436aSJernej Skrabec goto err_disable_clk_tmds;
169b7c7436aSJernej Skrabec }
170b7c7436aSJernej Skrabec
1719bf37977SSaravana Kannan ret = sun8i_hdmi_phy_get(hdmi, phy_node);
172b7c7436aSJernej Skrabec of_node_put(phy_node);
173b7c7436aSJernej Skrabec if (ret) {
174b7c7436aSJernej Skrabec dev_err(dev, "Couldn't get the HDMI PHY\n");
175b7c7436aSJernej Skrabec goto err_disable_clk_tmds;
176b7c7436aSJernej Skrabec }
177b7c7436aSJernej Skrabec
178c64c8e04SJernej Skrabec ret = sun8i_hdmi_phy_init(hdmi->phy);
179c64c8e04SJernej Skrabec if (ret)
180c64c8e04SJernej Skrabec goto err_disable_clk_tmds;
181c64c8e04SJernej Skrabec
182b7c7436aSJernej Skrabec drm_encoder_helper_add(encoder, &sun8i_dw_hdmi_encoder_helper_funcs);
183f9f3a38dSThomas Zimmermann drm_simple_encoder_init(drm, encoder, DRM_MODE_ENCODER_TMDS);
184b7c7436aSJernej Skrabec
18579971521SJernej Skrabec plat_data->mode_valid = hdmi->quirks->mode_valid;
186c8ff6405SJonas Karlman plat_data->use_drm_infoframe = hdmi->quirks->use_drm_infoframe;
187c71c9b2fSJernej Skrabec sun8i_hdmi_phy_set_ops(hdmi->phy, plat_data);
188b7c7436aSJernej Skrabec
189b7c7436aSJernej Skrabec platform_set_drvdata(pdev, hdmi);
190b7c7436aSJernej Skrabec
191b7c7436aSJernej Skrabec hdmi->hdmi = dw_hdmi_bind(pdev, encoder, plat_data);
192b7c7436aSJernej Skrabec
193b7c7436aSJernej Skrabec /*
194b7c7436aSJernej Skrabec * If dw_hdmi_bind() fails we'll never call dw_hdmi_unbind(),
195b7c7436aSJernej Skrabec * which would have called the encoder cleanup. Do it manually.
196b7c7436aSJernej Skrabec */
197b7c7436aSJernej Skrabec if (IS_ERR(hdmi->hdmi)) {
198b7c7436aSJernej Skrabec ret = PTR_ERR(hdmi->hdmi);
199b7c7436aSJernej Skrabec goto cleanup_encoder;
200b7c7436aSJernej Skrabec }
201b7c7436aSJernej Skrabec
202b7c7436aSJernej Skrabec return 0;
203b7c7436aSJernej Skrabec
204b7c7436aSJernej Skrabec cleanup_encoder:
205b7c7436aSJernej Skrabec drm_encoder_cleanup(encoder);
206b7c7436aSJernej Skrabec err_disable_clk_tmds:
207b7c7436aSJernej Skrabec clk_disable_unprepare(hdmi->clk_tmds);
208b7c7436aSJernej Skrabec err_assert_ctrl_reset:
209b7c7436aSJernej Skrabec reset_control_assert(hdmi->rst_ctrl);
21092016904SSamuel Holland err_disable_regulator:
211633ba1e0SJernej Skrabec regulator_disable(hdmi->regulator);
212b7c7436aSJernej Skrabec
213b7c7436aSJernej Skrabec return ret;
214b7c7436aSJernej Skrabec }
215b7c7436aSJernej Skrabec
sun8i_dw_hdmi_unbind(struct device * dev,struct device * master,void * data)216b7c7436aSJernej Skrabec static void sun8i_dw_hdmi_unbind(struct device *dev, struct device *master,
217b7c7436aSJernej Skrabec void *data)
218b7c7436aSJernej Skrabec {
219b7c7436aSJernej Skrabec struct sun8i_dw_hdmi *hdmi = dev_get_drvdata(dev);
220b7c7436aSJernej Skrabec
221b7c7436aSJernej Skrabec dw_hdmi_unbind(hdmi->hdmi);
222c64c8e04SJernej Skrabec sun8i_hdmi_phy_deinit(hdmi->phy);
223b7c7436aSJernej Skrabec clk_disable_unprepare(hdmi->clk_tmds);
224b7c7436aSJernej Skrabec reset_control_assert(hdmi->rst_ctrl);
225633ba1e0SJernej Skrabec regulator_disable(hdmi->regulator);
226b7c7436aSJernej Skrabec }
227b7c7436aSJernej Skrabec
228b7c7436aSJernej Skrabec static const struct component_ops sun8i_dw_hdmi_ops = {
229b7c7436aSJernej Skrabec .bind = sun8i_dw_hdmi_bind,
230b7c7436aSJernej Skrabec .unbind = sun8i_dw_hdmi_unbind,
231b7c7436aSJernej Skrabec };
232b7c7436aSJernej Skrabec
sun8i_dw_hdmi_probe(struct platform_device * pdev)233b7c7436aSJernej Skrabec static int sun8i_dw_hdmi_probe(struct platform_device *pdev)
234b7c7436aSJernej Skrabec {
235b7c7436aSJernej Skrabec return component_add(&pdev->dev, &sun8i_dw_hdmi_ops);
236b7c7436aSJernej Skrabec }
237b7c7436aSJernej Skrabec
sun8i_dw_hdmi_remove(struct platform_device * pdev)238d665e3c9SUwe Kleine-König static void sun8i_dw_hdmi_remove(struct platform_device *pdev)
239b7c7436aSJernej Skrabec {
240b7c7436aSJernej Skrabec component_del(&pdev->dev, &sun8i_dw_hdmi_ops);
241b7c7436aSJernej Skrabec }
242b7c7436aSJernej Skrabec
24379971521SJernej Skrabec static const struct sun8i_dw_hdmi_quirks sun8i_a83t_quirks = {
24479971521SJernej Skrabec .mode_valid = sun8i_dw_hdmi_mode_valid_a83t,
24579971521SJernej Skrabec };
24679971521SJernej Skrabec
24740bb9d31SJernej Skrabec static const struct sun8i_dw_hdmi_quirks sun50i_h6_quirks = {
24840bb9d31SJernej Skrabec .mode_valid = sun8i_dw_hdmi_mode_valid_h6,
249c8ff6405SJonas Karlman .use_drm_infoframe = true,
25040bb9d31SJernej Skrabec };
25140bb9d31SJernej Skrabec
252b7c7436aSJernej Skrabec static const struct of_device_id sun8i_dw_hdmi_dt_ids[] = {
25379971521SJernej Skrabec {
25479971521SJernej Skrabec .compatible = "allwinner,sun8i-a83t-dw-hdmi",
25579971521SJernej Skrabec .data = &sun8i_a83t_quirks,
25679971521SJernej Skrabec },
25740bb9d31SJernej Skrabec {
25840bb9d31SJernej Skrabec .compatible = "allwinner,sun50i-h6-dw-hdmi",
25940bb9d31SJernej Skrabec .data = &sun50i_h6_quirks,
26040bb9d31SJernej Skrabec },
261b7c7436aSJernej Skrabec { /* sentinel */ },
262b7c7436aSJernej Skrabec };
263b7c7436aSJernej Skrabec MODULE_DEVICE_TABLE(of, sun8i_dw_hdmi_dt_ids);
264b7c7436aSJernej Skrabec
265c089af18SWei Yongjun static struct platform_driver sun8i_dw_hdmi_pltfm_driver = {
266b7c7436aSJernej Skrabec .probe = sun8i_dw_hdmi_probe,
267d665e3c9SUwe Kleine-König .remove_new = sun8i_dw_hdmi_remove,
268b7c7436aSJernej Skrabec .driver = {
269b7c7436aSJernej Skrabec .name = "sun8i-dw-hdmi",
270b7c7436aSJernej Skrabec .of_match_table = sun8i_dw_hdmi_dt_ids,
271b7c7436aSJernej Skrabec },
272b7c7436aSJernej Skrabec };
2739bf37977SSaravana Kannan
sun8i_dw_hdmi_init(void)2749bf37977SSaravana Kannan static int __init sun8i_dw_hdmi_init(void)
2759bf37977SSaravana Kannan {
2769bf37977SSaravana Kannan int ret;
2779bf37977SSaravana Kannan
2789bf37977SSaravana Kannan ret = platform_driver_register(&sun8i_dw_hdmi_pltfm_driver);
2799bf37977SSaravana Kannan if (ret)
2809bf37977SSaravana Kannan return ret;
2819bf37977SSaravana Kannan
2829bf37977SSaravana Kannan ret = platform_driver_register(&sun8i_hdmi_phy_driver);
2839bf37977SSaravana Kannan if (ret) {
2849bf37977SSaravana Kannan platform_driver_unregister(&sun8i_dw_hdmi_pltfm_driver);
2859bf37977SSaravana Kannan return ret;
2869bf37977SSaravana Kannan }
2879bf37977SSaravana Kannan
2889bf37977SSaravana Kannan return ret;
2899bf37977SSaravana Kannan }
2909bf37977SSaravana Kannan
sun8i_dw_hdmi_exit(void)2919bf37977SSaravana Kannan static void __exit sun8i_dw_hdmi_exit(void)
2929bf37977SSaravana Kannan {
2939bf37977SSaravana Kannan platform_driver_unregister(&sun8i_dw_hdmi_pltfm_driver);
2949bf37977SSaravana Kannan platform_driver_unregister(&sun8i_hdmi_phy_driver);
2959bf37977SSaravana Kannan }
2969bf37977SSaravana Kannan
2979bf37977SSaravana Kannan module_init(sun8i_dw_hdmi_init);
2989bf37977SSaravana Kannan module_exit(sun8i_dw_hdmi_exit);
299b7c7436aSJernej Skrabec
300b7c7436aSJernej Skrabec MODULE_AUTHOR("Jernej Skrabec <jernej.skrabec@siol.net>");
301b7c7436aSJernej Skrabec MODULE_DESCRIPTION("Allwinner DW HDMI bridge");
302b7c7436aSJernej Skrabec MODULE_LICENSE("GPL");
303