2 * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
10 #include <linux/module.h>
11 #include <linux/platform_device.h>
12 #include <linux/mfd/syscon.h>
13 #include <linux/regmap.h>
14 #include <drm/drm_of.h>
16 #include <drm/drm_crtc_helper.h>
17 #include <drm/drm_edid.h>
18 #include <drm/drm_encoder_slave.h>
19 #include <drm/bridge/dw_hdmi.h>
21 #include "rockchip_drm_drv.h"
22 #include "rockchip_drm_vop.h"
24 #define GRF_SOC_CON6 0x025c
25 #define HDMI_SEL_VOP_LIT (1 << 4)
27 struct rockchip_hdmi
{
29 struct regmap
*regmap
;
30 struct drm_encoder encoder
;
33 #define to_rockchip_hdmi(x) container_of(x, struct rockchip_hdmi, x)
35 static const struct dw_hdmi_mpll_config rockchip_mpll_cfg
[] = {
115 static const struct dw_hdmi_curr_ctrl rockchip_cur_ctr
[] = {
116 /* pixelclk bpp8 bpp10 bpp12 */
118 40000000, { 0x0018, 0x0018, 0x0018 },
120 65000000, { 0x0028, 0x0028, 0x0028 },
122 66000000, { 0x0038, 0x0038, 0x0038 },
124 74250000, { 0x0028, 0x0038, 0x0038 },
126 83500000, { 0x0028, 0x0038, 0x0038 },
128 146250000, { 0x0038, 0x0038, 0x0038 },
130 148500000, { 0x0000, 0x0038, 0x0038 },
132 ~0UL, { 0x0000, 0x0000, 0x0000},
136 static const struct dw_hdmi_phy_config rockchip_phy_config
[] = {
137 /*pixelclk symbol term vlev*/
138 { 74250000, 0x8009, 0x0004, 0x0272},
139 { 148500000, 0x802b, 0x0004, 0x028d},
140 { 297000000, 0x8039, 0x0005, 0x028d},
141 { ~0UL, 0x0000, 0x0000, 0x0000}
144 static int rockchip_hdmi_parse_dt(struct rockchip_hdmi
*hdmi
)
146 struct device_node
*np
= hdmi
->dev
->of_node
;
148 hdmi
->regmap
= syscon_regmap_lookup_by_phandle(np
, "rockchip,grf");
149 if (IS_ERR(hdmi
->regmap
)) {
150 dev_err(hdmi
->dev
, "Unable to get rockchip,grf\n");
151 return PTR_ERR(hdmi
->regmap
);
157 static enum drm_mode_status
158 dw_hdmi_rockchip_mode_valid(struct drm_connector
*connector
,
159 struct drm_display_mode
*mode
)
161 const struct dw_hdmi_mpll_config
*mpll_cfg
= rockchip_mpll_cfg
;
162 int pclk
= mode
->clock
* 1000;
166 for (i
= 0; mpll_cfg
[i
].mpixelclock
!= (~0UL); i
++) {
167 if (pclk
== mpll_cfg
[i
].mpixelclock
) {
173 return (valid
) ? MODE_OK
: MODE_BAD
;
176 static const struct drm_encoder_funcs dw_hdmi_rockchip_encoder_funcs
= {
177 .destroy
= drm_encoder_cleanup
,
180 static void dw_hdmi_rockchip_encoder_disable(struct drm_encoder
*encoder
)
185 dw_hdmi_rockchip_encoder_mode_fixup(struct drm_encoder
*encoder
,
186 const struct drm_display_mode
*mode
,
187 struct drm_display_mode
*adj_mode
)
192 static void dw_hdmi_rockchip_encoder_mode_set(struct drm_encoder
*encoder
,
193 struct drm_display_mode
*mode
,
194 struct drm_display_mode
*adj_mode
)
198 static void dw_hdmi_rockchip_encoder_enable(struct drm_encoder
*encoder
)
200 struct rockchip_hdmi
*hdmi
= to_rockchip_hdmi(encoder
);
204 rockchip_drm_crtc_mode_config(encoder
->crtc
, DRM_MODE_CONNECTOR_HDMIA
,
205 ROCKCHIP_OUT_MODE_AAAA
);
207 mux
= rockchip_drm_encoder_get_mux_id(hdmi
->dev
->of_node
, encoder
);
209 val
= HDMI_SEL_VOP_LIT
| (HDMI_SEL_VOP_LIT
<< 16);
211 val
= HDMI_SEL_VOP_LIT
<< 16;
213 regmap_write(hdmi
->regmap
, GRF_SOC_CON6
, val
);
214 dev_dbg(hdmi
->dev
, "vop %s output to hdmi\n",
215 (mux
) ? "LIT" : "BIG");
218 static const struct drm_encoder_helper_funcs dw_hdmi_rockchip_encoder_helper_funcs
= {
219 .mode_fixup
= dw_hdmi_rockchip_encoder_mode_fixup
,
220 .mode_set
= dw_hdmi_rockchip_encoder_mode_set
,
221 .enable
= dw_hdmi_rockchip_encoder_enable
,
222 .disable
= dw_hdmi_rockchip_encoder_disable
,
225 static const struct dw_hdmi_plat_data rockchip_hdmi_drv_data
= {
226 .mode_valid
= dw_hdmi_rockchip_mode_valid
,
227 .mpll_cfg
= rockchip_mpll_cfg
,
228 .cur_ctr
= rockchip_cur_ctr
,
229 .phy_config
= rockchip_phy_config
,
230 .dev_type
= RK3288_HDMI
,
233 static const struct of_device_id dw_hdmi_rockchip_dt_ids
[] = {
234 { .compatible
= "rockchip,rk3288-dw-hdmi",
235 .data
= &rockchip_hdmi_drv_data
239 MODULE_DEVICE_TABLE(of
, dw_hdmi_rockchip_dt_ids
);
241 static int dw_hdmi_rockchip_bind(struct device
*dev
, struct device
*master
,
244 struct platform_device
*pdev
= to_platform_device(dev
);
245 const struct dw_hdmi_plat_data
*plat_data
;
246 const struct of_device_id
*match
;
247 struct drm_device
*drm
= data
;
248 struct drm_encoder
*encoder
;
249 struct rockchip_hdmi
*hdmi
;
250 struct resource
*iores
;
254 if (!pdev
->dev
.of_node
)
257 hdmi
= devm_kzalloc(&pdev
->dev
, sizeof(*hdmi
), GFP_KERNEL
);
261 match
= of_match_node(dw_hdmi_rockchip_dt_ids
, pdev
->dev
.of_node
);
262 plat_data
= match
->data
;
263 hdmi
->dev
= &pdev
->dev
;
264 encoder
= &hdmi
->encoder
;
266 irq
= platform_get_irq(pdev
, 0);
270 iores
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
274 platform_set_drvdata(pdev
, hdmi
);
276 encoder
->possible_crtcs
= drm_of_find_possible_crtcs(drm
, dev
->of_node
);
278 * If we failed to find the CRTC(s) which this encoder is
279 * supposed to be connected to, it's because the CRTC has
280 * not been registered yet. Defer probing, and hope that
281 * the required CRTC is added later.
283 if (encoder
->possible_crtcs
== 0)
284 return -EPROBE_DEFER
;
286 ret
= rockchip_hdmi_parse_dt(hdmi
);
288 dev_err(hdmi
->dev
, "Unable to parse OF data\n");
292 drm_encoder_helper_add(encoder
, &dw_hdmi_rockchip_encoder_helper_funcs
);
293 drm_encoder_init(drm
, encoder
, &dw_hdmi_rockchip_encoder_funcs
,
294 DRM_MODE_ENCODER_TMDS
, NULL
);
296 return dw_hdmi_bind(dev
, master
, data
, encoder
, iores
, irq
, plat_data
);
299 static void dw_hdmi_rockchip_unbind(struct device
*dev
, struct device
*master
,
302 return dw_hdmi_unbind(dev
, master
, data
);
305 static const struct component_ops dw_hdmi_rockchip_ops
= {
306 .bind
= dw_hdmi_rockchip_bind
,
307 .unbind
= dw_hdmi_rockchip_unbind
,
310 static int dw_hdmi_rockchip_probe(struct platform_device
*pdev
)
312 return component_add(&pdev
->dev
, &dw_hdmi_rockchip_ops
);
315 static int dw_hdmi_rockchip_remove(struct platform_device
*pdev
)
317 component_del(&pdev
->dev
, &dw_hdmi_rockchip_ops
);
322 static struct platform_driver dw_hdmi_rockchip_pltfm_driver
= {
323 .probe
= dw_hdmi_rockchip_probe
,
324 .remove
= dw_hdmi_rockchip_remove
,
326 .name
= "dwhdmi-rockchip",
327 .of_match_table
= dw_hdmi_rockchip_dt_ids
,
331 module_platform_driver(dw_hdmi_rockchip_pltfm_driver
);
333 MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com>");
334 MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
335 MODULE_DESCRIPTION("Rockchip Specific DW-HDMI Driver Extension");
336 MODULE_LICENSE("GPL");
337 MODULE_ALIAS("platform:dwhdmi-rockchip");