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drm/i2c: nxp-tda998x (v3)
[linux-2.6-block.git] / drivers / gpu / drm / i2c / tda998x_drv.c
CommitLineData
e7792ce2
RC		 1/*
2 * Copyright (C) 2012 Texas Instruments
3 * Author: Rob Clark <robdclark@gmail.com>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18
19
20#include <linux/module.h>
21
22#include <drm/drmP.h>
23#include <drm/drm_crtc_helper.h>
24#include <drm/drm_encoder_slave.h>
25#include <drm/drm_edid.h>
26
27
28#define DBG(fmt, ...) DRM_DEBUG(fmt"\n", ##__VA_ARGS__)
29
30struct tda998x_priv {
31 struct i2c_client *cec;
32 uint16_t rev;
33 uint8_t current_page;
34 int dpms;
35};
36
37#define to_tda998x_priv(x) ((struct tda998x_priv *)to_encoder_slave(x)->slave_priv)
38
39/* The TDA9988 series of devices use a paged register scheme.. to simplify
40 * things we encode the page # in upper bits of the register #. To read/
41 * write a given register, we need to make sure CURPAGE register is set
42 * appropriately. Which implies reads/writes are not atomic. Fun!
43 */
44
45#define REG(page, addr) (((page) << 8) | (addr))
46#define REG2ADDR(reg) ((reg) & 0xff)
47#define REG2PAGE(reg) (((reg) >> 8) & 0xff)
48
49#define REG_CURPAGE 0xff /* write */
50
51
52/* Page 00h: General Control */
53#define REG_VERSION_LSB REG(0x00, 0x00) /* read */
54#define REG_MAIN_CNTRL0 REG(0x00, 0x01) /* read/write */
55# define MAIN_CNTRL0_SR (1 << 0)
56# define MAIN_CNTRL0_DECS (1 << 1)
57# define MAIN_CNTRL0_DEHS (1 << 2)
58# define MAIN_CNTRL0_CECS (1 << 3)
59# define MAIN_CNTRL0_CEHS (1 << 4)
60# define MAIN_CNTRL0_SCALER (1 << 7)
61#define REG_VERSION_MSB REG(0x00, 0x02) /* read */
62#define REG_SOFTRESET REG(0x00, 0x0a) /* write */
63# define SOFTRESET_AUDIO (1 << 0)
64# define SOFTRESET_I2C_MASTER (1 << 1)
65#define REG_DDC_DISABLE REG(0x00, 0x0b) /* read/write */
66#define REG_CCLK_ON REG(0x00, 0x0c) /* read/write */
67#define REG_I2C_MASTER REG(0x00, 0x0d) /* read/write */
68# define I2C_MASTER_DIS_MM (1 << 0)
69# define I2C_MASTER_DIS_FILT (1 << 1)
70# define I2C_MASTER_APP_STRT_LAT (1 << 2)
71#define REG_INT_FLAGS_0 REG(0x00, 0x0f) /* read/write */
72#define REG_INT_FLAGS_1 REG(0x00, 0x10) /* read/write */
73#define REG_INT_FLAGS_2 REG(0x00, 0x11) /* read/write */
74# define INT_FLAGS_2_EDID_BLK_RD (1 << 1)
75#define REG_ENA_VP_0 REG(0x00, 0x18) /* read/write */
76#define REG_ENA_VP_1 REG(0x00, 0x19) /* read/write */
77#define REG_ENA_VP_2 REG(0x00, 0x1a) /* read/write */
78#define REG_ENA_AP REG(0x00, 0x1e) /* read/write */
79#define REG_VIP_CNTRL_0 REG(0x00, 0x20) /* write */
80# define VIP_CNTRL_0_MIRR_A (1 << 7)
81# define VIP_CNTRL_0_SWAP_A(x) (((x) & 7) << 4)
82# define VIP_CNTRL_0_MIRR_B (1 << 3)
83# define VIP_CNTRL_0_SWAP_B(x) (((x) & 7) << 0)
84#define REG_VIP_CNTRL_1 REG(0x00, 0x21) /* write */
85# define VIP_CNTRL_1_MIRR_C (1 << 7)
86# define VIP_CNTRL_1_SWAP_C(x) (((x) & 7) << 4)
87# define VIP_CNTRL_1_MIRR_D (1 << 3)
88# define VIP_CNTRL_1_SWAP_D(x) (((x) & 7) << 0)
89#define REG_VIP_CNTRL_2 REG(0x00, 0x22) /* write */
90# define VIP_CNTRL_2_MIRR_E (1 << 7)
91# define VIP_CNTRL_2_SWAP_E(x) (((x) & 7) << 4)
92# define VIP_CNTRL_2_MIRR_F (1 << 3)
93# define VIP_CNTRL_2_SWAP_F(x) (((x) & 7) << 0)
94#define REG_VIP_CNTRL_3 REG(0x00, 0x23) /* write */
95# define VIP_CNTRL_3_X_TGL (1 << 0)
96# define VIP_CNTRL_3_H_TGL (1 << 1)
97# define VIP_CNTRL_3_V_TGL (1 << 2)
98# define VIP_CNTRL_3_EMB (1 << 3)
99# define VIP_CNTRL_3_SYNC_DE (1 << 4)
100# define VIP_CNTRL_3_SYNC_HS (1 << 5)
101# define VIP_CNTRL_3_DE_INT (1 << 6)
102# define VIP_CNTRL_3_EDGE (1 << 7)
103#define REG_VIP_CNTRL_4 REG(0x00, 0x24) /* write */
104# define VIP_CNTRL_4_BLC(x) (((x) & 3) << 0)
105# define VIP_CNTRL_4_BLANKIT(x) (((x) & 3) << 2)
106# define VIP_CNTRL_4_CCIR656 (1 << 4)
107# define VIP_CNTRL_4_656_ALT (1 << 5)
108# define VIP_CNTRL_4_TST_656 (1 << 6)
109# define VIP_CNTRL_4_TST_PAT (1 << 7)
110#define REG_VIP_CNTRL_5 REG(0x00, 0x25) /* write */
111# define VIP_CNTRL_5_CKCASE (1 << 0)
112# define VIP_CNTRL_5_SP_CNT(x) (((x) & 3) << 1)
113#define REG_MAT_CONTRL REG(0x00, 0x80) /* write */
114# define MAT_CONTRL_MAT_SC(x) (((x) & 3) << 0)
115# define MAT_CONTRL_MAT_BP (1 << 2)
116#define REG_VIDFORMAT REG(0x00, 0xa0) /* write */
117#define REG_REFPIX_MSB REG(0x00, 0xa1) /* write */
118#define REG_REFPIX_LSB REG(0x00, 0xa2) /* write */
119#define REG_REFLINE_MSB REG(0x00, 0xa3) /* write */
120#define REG_REFLINE_LSB REG(0x00, 0xa4) /* write */
121#define REG_NPIX_MSB REG(0x00, 0xa5) /* write */
122#define REG_NPIX_LSB REG(0x00, 0xa6) /* write */
123#define REG_NLINE_MSB REG(0x00, 0xa7) /* write */
124#define REG_NLINE_LSB REG(0x00, 0xa8) /* write */
125#define REG_VS_LINE_STRT_1_MSB REG(0x00, 0xa9) /* write */
126#define REG_VS_LINE_STRT_1_LSB REG(0x00, 0xaa) /* write */
127#define REG_VS_PIX_STRT_1_MSB REG(0x00, 0xab) /* write */
128#define REG_VS_PIX_STRT_1_LSB REG(0x00, 0xac) /* write */
129#define REG_VS_LINE_END_1_MSB REG(0x00, 0xad) /* write */
130#define REG_VS_LINE_END_1_LSB REG(0x00, 0xae) /* write */
131#define REG_VS_PIX_END_1_MSB REG(0x00, 0xaf) /* write */
132#define REG_VS_PIX_END_1_LSB REG(0x00, 0xb0) /* write */
133#define REG_VS_PIX_STRT_2_MSB REG(0x00, 0xb3) /* write */
134#define REG_VS_PIX_STRT_2_LSB REG(0x00, 0xb4) /* write */
135#define REG_VS_PIX_END_2_MSB REG(0x00, 0xb7) /* write */
136#define REG_VS_PIX_END_2_LSB REG(0x00, 0xb8) /* write */
137#define REG_HS_PIX_START_MSB REG(0x00, 0xb9) /* write */
138#define REG_HS_PIX_START_LSB REG(0x00, 0xba) /* write */
139#define REG_HS_PIX_STOP_MSB REG(0x00, 0xbb) /* write */
140#define REG_HS_PIX_STOP_LSB REG(0x00, 0xbc) /* write */
141#define REG_VWIN_START_1_MSB REG(0x00, 0xbd) /* write */
142#define REG_VWIN_START_1_LSB REG(0x00, 0xbe) /* write */
143#define REG_VWIN_END_1_MSB REG(0x00, 0xbf) /* write */
144#define REG_VWIN_END_1_LSB REG(0x00, 0xc0) /* write */
145#define REG_DE_START_MSB REG(0x00, 0xc5) /* write */
146#define REG_DE_START_LSB REG(0x00, 0xc6) /* write */
147#define REG_DE_STOP_MSB REG(0x00, 0xc7) /* write */
148#define REG_DE_STOP_LSB REG(0x00, 0xc8) /* write */
149#define REG_TBG_CNTRL_0 REG(0x00, 0xca) /* write */
150# define TBG_CNTRL_0_FRAME_DIS (1 << 5)
151# define TBG_CNTRL_0_SYNC_MTHD (1 << 6)
152# define TBG_CNTRL_0_SYNC_ONCE (1 << 7)
153#define REG_TBG_CNTRL_1 REG(0x00, 0xcb) /* write */
154# define TBG_CNTRL_1_VH_TGL_0 (1 << 0)
155# define TBG_CNTRL_1_VH_TGL_1 (1 << 1)
156# define TBG_CNTRL_1_VH_TGL_2 (1 << 2)
157# define TBG_CNTRL_1_VHX_EXT_DE (1 << 3)
158# define TBG_CNTRL_1_VHX_EXT_HS (1 << 4)
159# define TBG_CNTRL_1_VHX_EXT_VS (1 << 5)
160# define TBG_CNTRL_1_DWIN_DIS (1 << 6)
161#define REG_ENABLE_SPACE REG(0x00, 0xd6) /* write */
162#define REG_HVF_CNTRL_0 REG(0x00, 0xe4) /* write */
163# define HVF_CNTRL_0_SM (1 << 7)
164# define HVF_CNTRL_0_RWB (1 << 6)
165# define HVF_CNTRL_0_PREFIL(x) (((x) & 3) << 2)
166# define HVF_CNTRL_0_INTPOL(x) (((x) & 3) << 0)
167#define REG_HVF_CNTRL_1 REG(0x00, 0xe5) /* write */
168# define HVF_CNTRL_1_FOR (1 << 0)
169# define HVF_CNTRL_1_YUVBLK (1 << 1)
170# define HVF_CNTRL_1_VQR(x) (((x) & 3) << 2)
171# define HVF_CNTRL_1_PAD(x) (((x) & 3) << 4)
172# define HVF_CNTRL_1_SEMI_PLANAR (1 << 6)
173#define REG_RPT_CNTRL REG(0x00, 0xf0) /* write */
174
175
176/* Page 02h: PLL settings */
177#define REG_PLL_SERIAL_1 REG(0x02, 0x00) /* read/write */
178# define PLL_SERIAL_1_SRL_FDN (1 << 0)
179# define PLL_SERIAL_1_SRL_IZ(x) (((x) & 3) << 1)
180# define PLL_SERIAL_1_SRL_MAN_IZ (1 << 6)
181#define REG_PLL_SERIAL_2 REG(0x02, 0x01) /* read/write */
182# define PLL_SERIAL_2_SRL_NOSC(x) (((x) & 3) << 0)
183# define PLL_SERIAL_2_SRL_PR(x) (((x) & 0xf) << 4)
184#define REG_PLL_SERIAL_3 REG(0x02, 0x02) /* read/write */
185# define PLL_SERIAL_3_SRL_CCIR (1 << 0)
186# define PLL_SERIAL_3_SRL_DE (1 << 2)
187# define PLL_SERIAL_3_SRL_PXIN_SEL (1 << 4)
188#define REG_SERIALIZER REG(0x02, 0x03) /* read/write */
189#define REG_BUFFER_OUT REG(0x02, 0x04) /* read/write */
190#define REG_PLL_SCG1 REG(0x02, 0x05) /* read/write */
191#define REG_PLL_SCG2 REG(0x02, 0x06) /* read/write */
192#define REG_PLL_SCGN1 REG(0x02, 0x07) /* read/write */
193#define REG_PLL_SCGN2 REG(0x02, 0x08) /* read/write */
194#define REG_PLL_SCGR1 REG(0x02, 0x09) /* read/write */
195#define REG_PLL_SCGR2 REG(0x02, 0x0a) /* read/write */
196#define REG_AUDIO_DIV REG(0x02, 0x0e) /* read/write */
197#define REG_SEL_CLK REG(0x02, 0x11) /* read/write */
198# define SEL_CLK_SEL_CLK1 (1 << 0)
199# define SEL_CLK_SEL_VRF_CLK(x) (((x) & 3) << 1)
200# define SEL_CLK_ENA_SC_CLK (1 << 3)
201#define REG_ANA_GENERAL REG(0x02, 0x12) /* read/write */
202
203
204/* Page 09h: EDID Control */
205#define REG_EDID_DATA_0 REG(0x09, 0x00) /* read */
206/* next 127 successive registers are the EDID block */
207#define REG_EDID_CTRL REG(0x09, 0xfa) /* read/write */
208#define REG_DDC_ADDR REG(0x09, 0xfb) /* read/write */
209#define REG_DDC_OFFS REG(0x09, 0xfc) /* read/write */
210#define REG_DDC_SEGM_ADDR REG(0x09, 0xfd) /* read/write */
211#define REG_DDC_SEGM REG(0x09, 0xfe) /* read/write */
212
213
214/* Page 10h: information frames and packets */
215
216
217/* Page 11h: audio settings and content info packets */
218#define REG_AIP_CNTRL_0 REG(0x11, 0x00) /* read/write */
219# define AIP_CNTRL_0_RST_FIFO (1 << 0)
220# define AIP_CNTRL_0_SWAP (1 << 1)
221# define AIP_CNTRL_0_LAYOUT (1 << 2)
222# define AIP_CNTRL_0_ACR_MAN (1 << 5)
223# define AIP_CNTRL_0_RST_CTS (1 << 6)
224#define REG_ENC_CNTRL REG(0x11, 0x0d) /* read/write */
225# define ENC_CNTRL_RST_ENC (1 << 0)
226# define ENC_CNTRL_RST_SEL (1 << 1)
227# define ENC_CNTRL_CTL_CODE(x) (((x) & 3) << 2)
228
229
230/* Page 12h: HDCP and OTP */
231#define REG_TX3 REG(0x12, 0x9a) /* read/write */
232#define REG_TX33 REG(0x12, 0xb8) /* read/write */
233# define TX33_HDMI (1 << 1)
234
235
236/* Page 13h: Gamut related metadata packets */
237
238
239
240/* CEC registers: (not paged)
241 */
242#define REG_CEC_FRO_IM_CLK_CTRL 0xfb /* read/write */
243# define CEC_FRO_IM_CLK_CTRL_GHOST_DIS (1 << 7)
244# define CEC_FRO_IM_CLK_CTRL_ENA_OTP (1 << 6)
245# define CEC_FRO_IM_CLK_CTRL_IMCLK_SEL (1 << 1)
246# define CEC_FRO_IM_CLK_CTRL_FRO_DIV (1 << 0)
247#define REG_CEC_RXSHPDLEV 0xfe /* read */
248# define CEC_RXSHPDLEV_RXSENS (1 << 0)
249# define CEC_RXSHPDLEV_HPD (1 << 1)
250
251#define REG_CEC_ENAMODS 0xff /* read/write */
252# define CEC_ENAMODS_DIS_FRO (1 << 6)
253# define CEC_ENAMODS_DIS_CCLK (1 << 5)
254# define CEC_ENAMODS_EN_RXSENS (1 << 2)
255# define CEC_ENAMODS_EN_HDMI (1 << 1)
256# define CEC_ENAMODS_EN_CEC (1 << 0)
257
258
259/* Device versions: */
260#define TDA9989N2 0x0101
261#define TDA19989 0x0201
262#define TDA19989N2 0x0202
263#define TDA19988 0x0301
264
265static void
266cec_write(struct drm_encoder *encoder, uint16_t addr, uint8_t val)
267{
268 struct i2c_client *client = to_tda998x_priv(encoder)->cec;
269 uint8_t buf[] = {addr, val};
270 int ret;
271
272 ret = i2c_master_send(client, buf, ARRAY_SIZE(buf));
273 if (ret < 0)
274 dev_err(&client->dev, "Error %d writing to cec:0x%x\n", ret, addr);
275}
276
277static uint8_t
278cec_read(struct drm_encoder *encoder, uint8_t addr)
279{
280 struct i2c_client *client = to_tda998x_priv(encoder)->cec;
281 uint8_t val;
282 int ret;
283
284 ret = i2c_master_send(client, &addr, sizeof(addr));
285 if (ret < 0)
286 goto fail;
287
288 ret = i2c_master_recv(client, &val, sizeof(val));
289 if (ret < 0)
290 goto fail;
291
292 return val;
293
294fail:
295 dev_err(&client->dev, "Error %d reading from cec:0x%x\n", ret, addr);
296 return 0;
297}
298
299static void
300set_page(struct drm_encoder *encoder, uint16_t reg)
301{
302 struct tda998x_priv *priv = to_tda998x_priv(encoder);
303
304 if (REG2PAGE(reg) != priv->current_page) {
305 struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
306 uint8_t buf[] = {
307 REG_CURPAGE, REG2PAGE(reg)
308 };
309 int ret = i2c_master_send(client, buf, sizeof(buf));
310 if (ret < 0)
311 dev_err(&client->dev, "Error %d writing to REG_CURPAGE\n", ret);
312
313 priv->current_page = REG2PAGE(reg);
314 }
315}
316
317static int
318reg_read_range(struct drm_encoder *encoder, uint16_t reg, char *buf, int cnt)
319{
320 struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
321 uint8_t addr = REG2ADDR(reg);
322 int ret;
323
324 set_page(encoder, reg);
325
326 ret = i2c_master_send(client, &addr, sizeof(addr));
327 if (ret < 0)
328 goto fail;
329
330 ret = i2c_master_recv(client, buf, cnt);
331 if (ret < 0)
332 goto fail;
333
334 return ret;
335
336fail:
337 dev_err(&client->dev, "Error %d reading from 0x%x\n", ret, reg);
338 return ret;
339}
340
341static uint8_t
342reg_read(struct drm_encoder *encoder, uint16_t reg)
343{
344 uint8_t val = 0;
345 reg_read_range(encoder, reg, &val, sizeof(val));
346 return val;
347}
348
349static void
350reg_write(struct drm_encoder *encoder, uint16_t reg, uint8_t val)
351{
352 struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
353 uint8_t buf[] = {REG2ADDR(reg), val};
354 int ret;
355
356 set_page(encoder, reg);
357
358 ret = i2c_master_send(client, buf, ARRAY_SIZE(buf));
359 if (ret < 0)
360 dev_err(&client->dev, "Error %d writing to 0x%x\n", ret, reg);
361}
362
363static void
364reg_write16(struct drm_encoder *encoder, uint16_t reg, uint16_t val)
365{
366 struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
367 uint8_t buf[] = {REG2ADDR(reg), val >> 8, val};
368 int ret;
369
370 set_page(encoder, reg);
371
372 ret = i2c_master_send(client, buf, ARRAY_SIZE(buf));
373 if (ret < 0)
374 dev_err(&client->dev, "Error %d writing to 0x%x\n", ret, reg);
375}
376
377static void
378reg_set(struct drm_encoder *encoder, uint16_t reg, uint8_t val)
379{
380 reg_write(encoder, reg, reg_read(encoder, reg) | val);
381}
382
383static void
384reg_clear(struct drm_encoder *encoder, uint16_t reg, uint8_t val)
385{
386 reg_write(encoder, reg, reg_read(encoder, reg) & ~val);
387}
388
389static void
390tda998x_reset(struct drm_encoder *encoder)
391{
392 /* reset audio and i2c master: */
393 reg_set(encoder, REG_SOFTRESET, SOFTRESET_AUDIO | SOFTRESET_I2C_MASTER);
394 msleep(50);
395 reg_clear(encoder, REG_SOFTRESET, SOFTRESET_AUDIO | SOFTRESET_I2C_MASTER);
396 msleep(50);
397
398 /* reset transmitter: */
399 reg_set(encoder, REG_MAIN_CNTRL0, MAIN_CNTRL0_SR);
400 reg_clear(encoder, REG_MAIN_CNTRL0, MAIN_CNTRL0_SR);
401
402 /* PLL registers common configuration */
403 reg_write(encoder, REG_PLL_SERIAL_1, 0x00);
404 reg_write(encoder, REG_PLL_SERIAL_2, PLL_SERIAL_2_SRL_NOSC(1));
405 reg_write(encoder, REG_PLL_SERIAL_3, 0x00);
406 reg_write(encoder, REG_SERIALIZER, 0x00);
407 reg_write(encoder, REG_BUFFER_OUT, 0x00);
408 reg_write(encoder, REG_PLL_SCG1, 0x00);
409 reg_write(encoder, REG_AUDIO_DIV, 0x03);
410 reg_write(encoder, REG_SEL_CLK, SEL_CLK_SEL_CLK1 | SEL_CLK_ENA_SC_CLK);
411 reg_write(encoder, REG_PLL_SCGN1, 0xfa);
412 reg_write(encoder, REG_PLL_SCGN2, 0x00);
413 reg_write(encoder, REG_PLL_SCGR1, 0x5b);
414 reg_write(encoder, REG_PLL_SCGR2, 0x00);
415 reg_write(encoder, REG_PLL_SCG2, 0x10);
416}
417
418/* DRM encoder functions */
419
420static void
421tda998x_encoder_set_config(struct drm_encoder *encoder, void *params)
422{
423}
424
425static void
426tda998x_encoder_dpms(struct drm_encoder *encoder, int mode)
427{
428 struct tda998x_priv *priv = to_tda998x_priv(encoder);
429
430 /* we only care about on or off: */
431 if (mode != DRM_MODE_DPMS_ON)
432 mode = DRM_MODE_DPMS_OFF;
433
434 if (mode == priv->dpms)
435 return;
436
437 switch (mode) {
438 case DRM_MODE_DPMS_ON:
439 /* enable audio and video ports */
440 reg_write(encoder, REG_ENA_AP, 0xff);
441 reg_write(encoder, REG_ENA_VP_0, 0xff);
442 reg_write(encoder, REG_ENA_VP_1, 0xff);
443 reg_write(encoder, REG_ENA_VP_2, 0xff);
444 /* set muxing after enabling ports: */
445 reg_write(encoder, REG_VIP_CNTRL_0,
446 VIP_CNTRL_0_SWAP_A(2) | VIP_CNTRL_0_SWAP_B(3));
447 reg_write(encoder, REG_VIP_CNTRL_1,
448 VIP_CNTRL_1_SWAP_C(0) | VIP_CNTRL_1_SWAP_D(1));
449 reg_write(encoder, REG_VIP_CNTRL_2,
450 VIP_CNTRL_2_SWAP_E(4) | VIP_CNTRL_2_SWAP_F(5));
451 break;
452 case DRM_MODE_DPMS_OFF:
453 /* disable audio and video ports */
454 reg_write(encoder, REG_ENA_AP, 0x00);
455 reg_write(encoder, REG_ENA_VP_0, 0x00);
456 reg_write(encoder, REG_ENA_VP_1, 0x00);
457 reg_write(encoder, REG_ENA_VP_2, 0x00);
458 break;
459 }
460
461 priv->dpms = mode;
462}
463
464static void
465tda998x_encoder_save(struct drm_encoder *encoder)
466{
467 DBG("");
468}
469
470static void
471tda998x_encoder_restore(struct drm_encoder *encoder)
472{
473 DBG("");
474}
475
476static bool
477tda998x_encoder_mode_fixup(struct drm_encoder *encoder,
478 const struct drm_display_mode *mode,
479 struct drm_display_mode *adjusted_mode)
480{
481 return true;
482}
483
484static int
485tda998x_encoder_mode_valid(struct drm_encoder *encoder,
486 struct drm_display_mode *mode)
487{
488 return MODE_OK;
489}
490
491static void
492tda998x_encoder_mode_set(struct drm_encoder *encoder,
493 struct drm_display_mode *mode,
494 struct drm_display_mode *adjusted_mode)
495{
496 struct tda998x_priv *priv = to_tda998x_priv(encoder);
497 uint16_t hs_start, hs_end, line_start, line_end;
498 uint16_t vwin_start, vwin_end, de_start, de_end;
499 uint16_t ref_pix, ref_line, pix_start2;
500 uint8_t reg, div, rep;
501
502 hs_start = mode->hsync_start - mode->hdisplay;
503 hs_end = mode->hsync_end - mode->hdisplay;
504 line_start = 1;
505 line_end = 1 + mode->vsync_end - mode->vsync_start;
506 vwin_start = mode->vtotal - mode->vsync_start;
507 vwin_end = vwin_start + mode->vdisplay;
508 de_start = mode->htotal - mode->hdisplay;
509 de_end = mode->htotal;
510
511 pix_start2 = 0;
512 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
513 pix_start2 = (mode->htotal / 2) + hs_start;
514
515 /* TODO how is this value calculated? It is 2 for all common
516 * formats in the tables in out of tree nxp driver (assuming
517 * I've properly deciphered their byzantine table system)
518 */
519 ref_line = 2;
520
521 /* this might changes for other color formats from the CRTC: */
522 ref_pix = 3 + hs_start;
523
524 div = 148500 / mode->clock;
525
526 DBG("clock=%d, div=%u", mode->clock, div);
527 DBG("hs_start=%u, hs_end=%u, line_start=%u, line_end=%u",
528 hs_start, hs_end, line_start, line_end);
529 DBG("vwin_start=%u, vwin_end=%u, de_start=%u, de_end=%u",
530 vwin_start, vwin_end, de_start, de_end);
531 DBG("ref_line=%u, ref_pix=%u, pix_start2=%u",
532 ref_line, ref_pix, pix_start2);
533
534 /* mute the audio FIFO: */
535 reg_set(encoder, REG_AIP_CNTRL_0, AIP_CNTRL_0_RST_FIFO);
536
537 /* set HDMI HDCP mode off: */
538 reg_set(encoder, REG_TBG_CNTRL_1, TBG_CNTRL_1_DWIN_DIS);
539 reg_clear(encoder, REG_TX33, TX33_HDMI);
540
541 reg_write(encoder, REG_ENC_CNTRL, ENC_CNTRL_CTL_CODE(0));
542 /* no pre-filter or interpolator: */
543 reg_write(encoder, REG_HVF_CNTRL_0, HVF_CNTRL_0_PREFIL(0) |
544 HVF_CNTRL_0_INTPOL(0));
545 reg_write(encoder, REG_VIP_CNTRL_5, VIP_CNTRL_5_SP_CNT(0));
546 reg_write(encoder, REG_VIP_CNTRL_4, VIP_CNTRL_4_BLANKIT(0) |
547 VIP_CNTRL_4_BLC(0));
548 reg_clear(encoder, REG_PLL_SERIAL_3, PLL_SERIAL_3_SRL_CCIR);
549
550 reg_clear(encoder, REG_PLL_SERIAL_1, PLL_SERIAL_1_SRL_MAN_IZ);
551 reg_clear(encoder, REG_PLL_SERIAL_3, PLL_SERIAL_3_SRL_DE);
552 reg_write(encoder, REG_SERIALIZER, 0);
553 reg_write(encoder, REG_HVF_CNTRL_1, HVF_CNTRL_1_VQR(0));
554
555 /* TODO enable pixel repeat for pixel rates less than 25Msamp/s */
556 rep = 0;
557 reg_write(encoder, REG_RPT_CNTRL, 0);
558 reg_write(encoder, REG_SEL_CLK, SEL_CLK_SEL_VRF_CLK(0) |
559 SEL_CLK_SEL_CLK1 | SEL_CLK_ENA_SC_CLK);
560
561 reg_write(encoder, REG_PLL_SERIAL_2, PLL_SERIAL_2_SRL_NOSC(div) |
562 PLL_SERIAL_2_SRL_PR(rep));
563
564 reg_write16(encoder, REG_VS_PIX_STRT_2_MSB, pix_start2);
565 reg_write16(encoder, REG_VS_PIX_END_2_MSB, pix_start2);
566
567 /* set color matrix bypass flag: */
568 reg_set(encoder, REG_MAT_CONTRL, MAT_CONTRL_MAT_BP);
569
570 /* set BIAS tmds value: */
571 reg_write(encoder, REG_ANA_GENERAL, 0x09);
572
573 reg_clear(encoder, REG_TBG_CNTRL_0, TBG_CNTRL_0_SYNC_MTHD);
574
575 reg_write(encoder, REG_VIP_CNTRL_3, 0);
576 reg_set(encoder, REG_VIP_CNTRL_3, VIP_CNTRL_3_SYNC_HS);
577 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
578 reg_set(encoder, REG_VIP_CNTRL_3, VIP_CNTRL_3_V_TGL);
579
580 if (mode->flags & DRM_MODE_FLAG_NHSYNC)
581 reg_set(encoder, REG_VIP_CNTRL_3, VIP_CNTRL_3_H_TGL);
582
583 reg_write(encoder, REG_VIDFORMAT, 0x00);
584 reg_write16(encoder, REG_NPIX_MSB, mode->hdisplay - 1);
585 reg_write16(encoder, REG_NLINE_MSB, mode->vdisplay - 1);
586 reg_write16(encoder, REG_VS_LINE_STRT_1_MSB, line_start);
587 reg_write16(encoder, REG_VS_LINE_END_1_MSB, line_end);
588 reg_write16(encoder, REG_VS_PIX_STRT_1_MSB, hs_start);
589 reg_write16(encoder, REG_VS_PIX_END_1_MSB, hs_start);
590 reg_write16(encoder, REG_HS_PIX_START_MSB, hs_start);
591 reg_write16(encoder, REG_HS_PIX_STOP_MSB, hs_end);
592 reg_write16(encoder, REG_VWIN_START_1_MSB, vwin_start);
593 reg_write16(encoder, REG_VWIN_END_1_MSB, vwin_end);
594 reg_write16(encoder, REG_DE_START_MSB, de_start);
595 reg_write16(encoder, REG_DE_STOP_MSB, de_end);
596
597 if (priv->rev == TDA19988) {
598 /* let incoming pixels fill the active space (if any) */
599 reg_write(encoder, REG_ENABLE_SPACE, 0x01);
600 }
601
602 reg_write16(encoder, REG_REFPIX_MSB, ref_pix);
603 reg_write16(encoder, REG_REFLINE_MSB, ref_line);
604
605 reg = TBG_CNTRL_1_VHX_EXT_DE |
606 TBG_CNTRL_1_VHX_EXT_HS |
607 TBG_CNTRL_1_VHX_EXT_VS |
608 TBG_CNTRL_1_DWIN_DIS | /* HDCP off */
609 TBG_CNTRL_1_VH_TGL_2;
610 if (mode->flags & (DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC))
611 reg |= TBG_CNTRL_1_VH_TGL_0;
612 reg_set(encoder, REG_TBG_CNTRL_1, reg);
613
614 /* must be last register set: */
615 reg_clear(encoder, REG_TBG_CNTRL_0, TBG_CNTRL_0_SYNC_ONCE);
616}
617
618static enum drm_connector_status
619tda998x_encoder_detect(struct drm_encoder *encoder,
620 struct drm_connector *connector)
621{
622 uint8_t val = cec_read(encoder, REG_CEC_RXSHPDLEV);
623 return (val & CEC_RXSHPDLEV_HPD) ? connector_status_connected :
624 connector_status_disconnected;
625}
626
627static int
628read_edid_block(struct drm_encoder *encoder, uint8_t *buf, int blk)
629{
630 uint8_t offset, segptr;
631 int ret, i;
632
633 /* enable EDID read irq: */
634 reg_set(encoder, REG_INT_FLAGS_2, INT_FLAGS_2_EDID_BLK_RD);
635
636 offset = (blk & 1) ? 128 : 0;
637 segptr = blk / 2;
638
639 reg_write(encoder, REG_DDC_ADDR, 0xa0);
640 reg_write(encoder, REG_DDC_OFFS, offset);
641 reg_write(encoder, REG_DDC_SEGM_ADDR, 0x60);
642 reg_write(encoder, REG_DDC_SEGM, segptr);
643
644 /* enable reading EDID: */
645 reg_write(encoder, REG_EDID_CTRL, 0x1);
646
647 /* flag must be cleared by sw: */
648 reg_write(encoder, REG_EDID_CTRL, 0x0);
649
650 /* wait for block read to complete: */
651 for (i = 100; i > 0; i--) {
652 uint8_t val = reg_read(encoder, REG_INT_FLAGS_2);
653 if (val & INT_FLAGS_2_EDID_BLK_RD)
654 break;
655 msleep(1);
656 }
657
658 if (i == 0)
659 return -ETIMEDOUT;
660
661 ret = reg_read_range(encoder, REG_EDID_DATA_0, buf, EDID_LENGTH);
662 if (ret != EDID_LENGTH) {
663 dev_err(encoder->dev->dev, "failed to read edid block %d: %d",
664 blk, ret);
665 return ret;
666 }
667
668 reg_clear(encoder, REG_INT_FLAGS_2, INT_FLAGS_2_EDID_BLK_RD);
669
670 return 0;
671}
672
673static uint8_t *
674do_get_edid(struct drm_encoder *encoder)
675{
676 int j = 0, valid_extensions = 0;
677 uint8_t *block, *new;
678 bool print_bad_edid = drm_debug & DRM_UT_KMS;
679
680 if ((block = kmalloc(EDID_LENGTH, GFP_KERNEL)) == NULL)
681 return NULL;
682
683 /* base block fetch */
684 if (read_edid_block(encoder, block, 0))
685 goto fail;
686
687 if (!drm_edid_block_valid(block, 0, print_bad_edid))
688 goto fail;
689
690 /* if there's no extensions, we're done */
691 if (block[0x7e] == 0)
692 return block;
693
694 new = krealloc(block, (block[0x7e] + 1) * EDID_LENGTH, GFP_KERNEL);
695 if (!new)
696 goto fail;
697 block = new;
698
699 for (j = 1; j <= block[0x7e]; j++) {
700 uint8_t *ext_block = block + (valid_extensions + 1) * EDID_LENGTH;
701 if (read_edid_block(encoder, ext_block, j))
702 goto fail;
703
704 if (!drm_edid_block_valid(ext_block, j, print_bad_edid))
705 goto fail;
706
707 valid_extensions++;
708 }
709
710 if (valid_extensions != block[0x7e]) {
711 block[EDID_LENGTH-1] += block[0x7e] - valid_extensions;
712 block[0x7e] = valid_extensions;
713 new = krealloc(block, (valid_extensions + 1) * EDID_LENGTH, GFP_KERNEL);
714 if (!new)
715 goto fail;
716 block = new;
717 }
718
719 return block;
720
721fail:
722 dev_warn(encoder->dev->dev, "failed to read EDID\n");
723 kfree(block);
724 return NULL;
725}
726
727static int
728tda998x_encoder_get_modes(struct drm_encoder *encoder,
729 struct drm_connector *connector)
730{
731 struct edid *edid = (struct edid *)do_get_edid(encoder);
732 int n = 0;
733
734 if (edid) {
735 drm_mode_connector_update_edid_property(connector, edid);
736 n = drm_add_edid_modes(connector, edid);
737 kfree(edid);
738 }
739
740 return n;
741}
742
743static int
744tda998x_encoder_create_resources(struct drm_encoder *encoder,
745 struct drm_connector *connector)
746{
747 DBG("");
748 return 0;
749}
750
751static int
752tda998x_encoder_set_property(struct drm_encoder *encoder,
753 struct drm_connector *connector,
754 struct drm_property *property,
755 uint64_t val)
756{
757 DBG("");
758 return 0;
759}
760
761static void
762tda998x_encoder_destroy(struct drm_encoder *encoder)
763{
764 struct tda998x_priv *priv = to_tda998x_priv(encoder);
765 drm_i2c_encoder_destroy(encoder);
766 kfree(priv);
767}
768
769static struct drm_encoder_slave_funcs tda998x_encoder_funcs = {
770 .set_config = tda998x_encoder_set_config,
771 .destroy = tda998x_encoder_destroy,
772 .dpms = tda998x_encoder_dpms,
773 .save = tda998x_encoder_save,
774 .restore = tda998x_encoder_restore,
775 .mode_fixup = tda998x_encoder_mode_fixup,
776 .mode_valid = tda998x_encoder_mode_valid,
777 .mode_set = tda998x_encoder_mode_set,
778 .detect = tda998x_encoder_detect,
779 .get_modes = tda998x_encoder_get_modes,
780 .create_resources = tda998x_encoder_create_resources,
781 .set_property = tda998x_encoder_set_property,
782};
783
784/* I2C driver functions */
785
786static int
787tda998x_probe(struct i2c_client *client, const struct i2c_device_id *id)
788{
789 return 0;
790}
791
792static int
793tda998x_remove(struct i2c_client *client)
794{
795 return 0;
796}
797
798static int
799tda998x_encoder_init(struct i2c_client *client,
800 struct drm_device *dev,
801 struct drm_encoder_slave *encoder_slave)
802{
803 struct drm_encoder *encoder = &encoder_slave->base;
804 struct tda998x_priv *priv;
805
806 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
807 if (!priv)
808 return -ENOMEM;
809
810 priv->current_page = 0;
811 priv->cec = i2c_new_dummy(client->adapter, 0x34);
812 priv->dpms = DRM_MODE_DPMS_OFF;
813
814 encoder_slave->slave_priv = priv;
815 encoder_slave->slave_funcs = &tda998x_encoder_funcs;
816
817 /* wake up the device: */
818 cec_write(encoder, REG_CEC_ENAMODS,
819 CEC_ENAMODS_EN_RXSENS | CEC_ENAMODS_EN_HDMI);
820
821 tda998x_reset(encoder);
822
823 /* read version: */
824 priv->rev = reg_read(encoder, REG_VERSION_LSB) |
825 reg_read(encoder, REG_VERSION_MSB) << 8;
826
827 /* mask off feature bits: */
828 priv->rev &= ~0x30; /* not-hdcp and not-scalar bit */
829
830 switch (priv->rev) {
831 case TDA9989N2: dev_info(dev->dev, "found TDA9989 n2"); break;
832 case TDA19989: dev_info(dev->dev, "found TDA19989"); break;
833 case TDA19989N2: dev_info(dev->dev, "found TDA19989 n2"); break;
834 case TDA19988: dev_info(dev->dev, "found TDA19988"); break;
835 default:
836 DBG("found unsupported device: %04x", priv->rev);
837 goto fail;
838 }
839
840 /* after reset, enable DDC: */
841 reg_write(encoder, REG_DDC_DISABLE, 0x00);
842
843 /* set clock on DDC channel: */
844 reg_write(encoder, REG_TX3, 39);
845
846 /* if necessary, disable multi-master: */
847 if (priv->rev == TDA19989)
848 reg_set(encoder, REG_I2C_MASTER, I2C_MASTER_DIS_MM);
849
850 cec_write(encoder, REG_CEC_FRO_IM_CLK_CTRL,
851 CEC_FRO_IM_CLK_CTRL_GHOST_DIS | CEC_FRO_IM_CLK_CTRL_IMCLK_SEL);
852
853 return 0;
854
855fail:
856 /* if encoder_init fails, the encoder slave is never registered,
857 * so cleanup here:
858 */
859 if (priv->cec)
860 i2c_unregister_device(priv->cec);
861 kfree(priv);
862 encoder_slave->slave_priv = NULL;
863 encoder_slave->slave_funcs = NULL;
864 return -ENXIO;
865}
866
867static struct i2c_device_id tda998x_ids[] = {
868 { "tda998x", 0 },
869 { }
870};
871MODULE_DEVICE_TABLE(i2c, tda998x_ids);
872
873static struct drm_i2c_encoder_driver tda998x_driver = {
874 .i2c_driver = {
875 .probe = tda998x_probe,
876 .remove = tda998x_remove,
877 .driver = {
878 .name = "tda998x",
879 },
880 .id_table = tda998x_ids,
881 },
882 .encoder_init = tda998x_encoder_init,
883};
884
885/* Module initialization */
886
887static int __init
888tda998x_init(void)
889{
890 DBG("");
891 return drm_i2c_encoder_register(THIS_MODULE, &tda998x_driver);
892}
893
894static void __exit
895tda998x_exit(void)
896{
897 DBG("");
898 drm_i2c_encoder_unregister(&tda998x_driver);
899}
900
901MODULE_AUTHOR("Rob Clark <robdclark@gmail.com");
902MODULE_DESCRIPTION("NXP Semiconductors TDA998X HDMI Encoder");
903MODULE_LICENSE("GPL");
904
905module_init(tda998x_init);
906module_exit(tda998x_exit);
Linux 6.x block layer and io_uring tree(s)