[PATCH 3/4] RFC: drm/i2c: nxp-tda998x
Rob Clark
robdclark at gmail.com
Tue Jan 8 23:11:24 EST 2013
Driver for the NXP TDA998X i2c hdmi encoder slave.
Signed-off-by: Rob Clark <robdclark at gmail.com>
---
drivers/gpu/drm/i2c/Makefile | 3 +
drivers/gpu/drm/i2c/tda998x_drv.c | 907 ++++++++++++++++++++++++++++++++++++++
2 files changed, 910 insertions(+)
create mode 100644 drivers/gpu/drm/i2c/tda998x_drv.c
diff --git a/drivers/gpu/drm/i2c/Makefile b/drivers/gpu/drm/i2c/Makefile
index 9286256..43aa33b 100644
--- a/drivers/gpu/drm/i2c/Makefile
+++ b/drivers/gpu/drm/i2c/Makefile
@@ -5,3 +5,6 @@ obj-$(CONFIG_DRM_I2C_CH7006) += ch7006.o
sil164-y := sil164_drv.o
obj-$(CONFIG_DRM_I2C_SIL164) += sil164.o
+
+tda998x-y := tda998x_drv.o
+obj-$(CONFIG_DRM_I2C_NXP_TDA998X) += tda998x.o
diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
new file mode 100644
index 0000000..47f8fd2
--- /dev/null
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -0,0 +1,907 @@
+/*
+ * Copyright (C) 2012 Texas Instruments
+ * Author: Rob Clark <robdclark at gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+
+#include <linux/module.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_encoder_slave.h>
+#include <drm/drm_edid.h>
+
+
+#define DBG(fmt, ...) DRM_DEBUG(fmt"\n", ##__VA_ARGS__)
+
+struct tda998x_priv {
+ struct i2c_client *cec;
+ uint16_t rev;
+ uint8_t current_page;
+ int dpms;
+};
+
+#define to_tda998x_priv(x) ((struct tda998x_priv *)to_encoder_slave(x)->slave_priv)
+
+/* The TDA9988 series of devices use a paged register scheme.. to simplify
+ * things we encode the page # in upper bits of the register #. To read/
+ * write a given register, we need to make sure CURPAGE register is set
+ * appropriately. Which implies reads/writes are not atomic. Fun!
+ */
+
+#define REG(page, addr) (((page) << 8) | (addr))
+#define REG2ADDR(reg) ((reg) & 0xff)
+#define REG2PAGE(reg) (((reg) >> 8) & 0xff)
+
+#define REG_CURPAGE 0xff /* write */
+
+
+/* Page 00h: General Control */
+#define REG_VERSION_LSB REG(0x00, 0x00) /* read */
+#define REG_MAIN_CNTRL0 REG(0x00, 0x01) /* read/write */
+# define MAIN_CNTRL0_SR (1 << 0)
+# define MAIN_CNTRL0_DECS (1 << 1)
+# define MAIN_CNTRL0_DEHS (1 << 2)
+# define MAIN_CNTRL0_CECS (1 << 3)
+# define MAIN_CNTRL0_CEHS (1 << 4)
+# define MAIN_CNTRL0_SCALER (1 << 7)
+#define REG_VERSION_MSB REG(0x00, 0x02) /* read */
+#define REG_SOFTRESET REG(0x00, 0x0a) /* write */
+# define SOFTRESET_AUDIO (1 << 0)
+# define SOFTRESET_I2C_MASTER (1 << 1)
+#define REG_DDC_DISABLE REG(0x00, 0x0b) /* read/write */
+#define REG_CCLK_ON REG(0x00, 0x0c) /* read/write */
+#define REG_I2C_MASTER REG(0x00, 0x0d) /* read/write */
+# define I2C_MASTER_DIS_MM (1 << 0)
+# define I2C_MASTER_DIS_FILT (1 << 1)
+# define I2C_MASTER_APP_STRT_LAT (1 << 2)
+#define REG_INT_FLAGS_0 REG(0x00, 0x0f) /* read/write */
+#define REG_INT_FLAGS_1 REG(0x00, 0x10) /* read/write */
+#define REG_INT_FLAGS_2 REG(0x00, 0x11) /* read/write */
+# define INT_FLAGS_2_EDID_BLK_RD (1 << 1)
+#define REG_ENA_VP_0 REG(0x00, 0x18) /* read/write */
+#define REG_ENA_VP_1 REG(0x00, 0x19) /* read/write */
+#define REG_ENA_VP_2 REG(0x00, 0x1a) /* read/write */
+#define REG_ENA_AP REG(0x00, 0x1e) /* read/write */
+#define REG_VIP_CNTRL_0 REG(0x00, 0x20) /* write */
+# define VIP_CNTRL_0_MIRR_A (1 << 7)
+# define VIP_CNTRL_0_SWAP_A(x) (((x) & 7) << 4)
+# define VIP_CNTRL_0_MIRR_B (1 << 3)
+# define VIP_CNTRL_0_SWAP_B(x) (((x) & 7) << 0)
+#define REG_VIP_CNTRL_1 REG(0x00, 0x21) /* write */
+# define VIP_CNTRL_1_MIRR_C (1 << 7)
+# define VIP_CNTRL_1_SWAP_C(x) (((x) & 7) << 4)
+# define VIP_CNTRL_1_MIRR_D (1 << 3)
+# define VIP_CNTRL_1_SWAP_D(x) (((x) & 7) << 0)
+#define REG_VIP_CNTRL_2 REG(0x00, 0x22) /* write */
+# define VIP_CNTRL_2_MIRR_E (1 << 7)
+# define VIP_CNTRL_2_SWAP_E(x) (((x) & 7) << 4)
+# define VIP_CNTRL_2_MIRR_F (1 << 3)
+# define VIP_CNTRL_2_SWAP_F(x) (((x) & 7) << 0)
+#define REG_VIP_CNTRL_3 REG(0x00, 0x23) /* write */
+# define VIP_CNTRL_3_X_TGL (1 << 0)
+# define VIP_CNTRL_3_H_TGL (1 << 1)
+# define VIP_CNTRL_3_V_TGL (1 << 2)
+# define VIP_CNTRL_3_EMB (1 << 3)
+# define VIP_CNTRL_3_SYNC_DE (1 << 4)
+# define VIP_CNTRL_3_SYNC_HS (1 << 5)
+# define VIP_CNTRL_3_DE_INT (1 << 6)
+# define VIP_CNTRL_3_EDGE (1 << 7)
+#define REG_VIP_CNTRL_4 REG(0x00, 0x24) /* write */
+# define VIP_CNTRL_4_BLC(x) (((x) & 3) << 0)
+# define VIP_CNTRL_4_BLANKIT(x) (((x) & 3) << 2)
+# define VIP_CNTRL_4_CCIR656 (1 << 4)
+# define VIP_CNTRL_4_656_ALT (1 << 5)
+# define VIP_CNTRL_4_TST_656 (1 << 6)
+# define VIP_CNTRL_4_TST_PAT (1 << 7)
+#define REG_VIP_CNTRL_5 REG(0x00, 0x25) /* write */
+# define VIP_CNTRL_5_CKCASE (1 << 0)
+# define VIP_CNTRL_5_SP_CNT(x) (((x) & 3) << 1)
+#define REG_MAT_CONTRL REG(0x00, 0x80) /* write */
+# define MAT_CONTRL_MAT_SC(x) (((x) & 3) << 0)
+# define MAT_CONTRL_MAT_BP (1 << 2)
+#define REG_VIDFORMAT REG(0x00, 0xa0) /* write */
+#define REG_REFPIX_MSB REG(0x00, 0xa1) /* write */
+#define REG_REFPIX_LSB REG(0x00, 0xa2) /* write */
+#define REG_REFLINE_MSB REG(0x00, 0xa3) /* write */
+#define REG_REFLINE_LSB REG(0x00, 0xa4) /* write */
+#define REG_NPIX_MSB REG(0x00, 0xa5) /* write */
+#define REG_NPIX_LSB REG(0x00, 0xa6) /* write */
+#define REG_NLINE_MSB REG(0x00, 0xa7) /* write */
+#define REG_NLINE_LSB REG(0x00, 0xa8) /* write */
+#define REG_VS_LINE_STRT_1_MSB REG(0x00, 0xa9) /* write */
+#define REG_VS_LINE_STRT_1_LSB REG(0x00, 0xaa) /* write */
+#define REG_VS_PIX_STRT_1_MSB REG(0x00, 0xab) /* write */
+#define REG_VS_PIX_STRT_1_LSB REG(0x00, 0xac) /* write */
+#define REG_VS_LINE_END_1_MSB REG(0x00, 0xad) /* write */
+#define REG_VS_LINE_END_1_LSB REG(0x00, 0xae) /* write */
+#define REG_VS_PIX_END_1_MSB REG(0x00, 0xaf) /* write */
+#define REG_VS_PIX_END_1_LSB REG(0x00, 0xb0) /* write */
+#define REG_VS_PIX_STRT_2_MSB REG(0x00, 0xb3) /* write */
+#define REG_VS_PIX_STRT_2_LSB REG(0x00, 0xb4) /* write */
+#define REG_VS_PIX_END_2_MSB REG(0x00, 0xb7) /* write */
+#define REG_VS_PIX_END_2_LSB REG(0x00, 0xb8) /* write */
+#define REG_HS_PIX_START_MSB REG(0x00, 0xb9) /* write */
+#define REG_HS_PIX_START_LSB REG(0x00, 0xba) /* write */
+#define REG_HS_PIX_STOP_MSB REG(0x00, 0xbb) /* write */
+#define REG_HS_PIX_STOP_LSB REG(0x00, 0xbc) /* write */
+#define REG_VWIN_START_1_MSB REG(0x00, 0xbd) /* write */
+#define REG_VWIN_START_1_LSB REG(0x00, 0xbe) /* write */
+#define REG_VWIN_END_1_MSB REG(0x00, 0xbf) /* write */
+#define REG_VWIN_END_1_LSB REG(0x00, 0xc0) /* write */
+#define REG_DE_START_MSB REG(0x00, 0xc5) /* write */
+#define REG_DE_START_LSB REG(0x00, 0xc6) /* write */
+#define REG_DE_STOP_MSB REG(0x00, 0xc7) /* write */
+#define REG_DE_STOP_LSB REG(0x00, 0xc8) /* write */
+#define REG_TBG_CNTRL_0 REG(0x00, 0xca) /* write */
+# define TBG_CNTRL_0_FRAME_DIS (1 << 5)
+# define TBG_CNTRL_0_SYNC_MTHD (1 << 6)
+# define TBG_CNTRL_0_SYNC_ONCE (1 << 7)
+#define REG_TBG_CNTRL_1 REG(0x00, 0xcb) /* write */
+# define TBG_CNTRL_1_VH_TGL_0 (1 << 0)
+# define TBG_CNTRL_1_VH_TGL_1 (1 << 1)
+# define TBG_CNTRL_1_VH_TGL_2 (1 << 2)
+# define TBG_CNTRL_1_VHX_EXT_DE (1 << 3)
+# define TBG_CNTRL_1_VHX_EXT_HS (1 << 4)
+# define TBG_CNTRL_1_VHX_EXT_VS (1 << 5)
+# define TBG_CNTRL_1_DWIN_DIS (1 << 6)
+#define REG_ENABLE_SPACE REG(0x00, 0xd6) /* write */
+#define REG_HVF_CNTRL_0 REG(0x00, 0xe4) /* write */
+# define HVF_CNTRL_0_SM (1 << 7)
+# define HVF_CNTRL_0_RWB (1 << 6)
+# define HVF_CNTRL_0_PREFIL(x) (((x) & 3) << 2)
+# define HVF_CNTRL_0_INTPOL(x) (((x) & 3) << 0)
+#define REG_HVF_CNTRL_1 REG(0x00, 0xe5) /* write */
+# define HVF_CNTRL_1_FOR (1 << 0)
+# define HVF_CNTRL_1_YUVBLK (1 << 1)
+# define HVF_CNTRL_1_VQR(x) (((x) & 3) << 2)
+# define HVF_CNTRL_1_PAD(x) (((x) & 3) << 4)
+# define HVF_CNTRL_1_SEMI_PLANAR (1 << 6)
+#define REG_RPT_CNTRL REG(0x00, 0xf0) /* write */
+
+
+/* Page 02h: PLL settings */
+#define REG_PLL_SERIAL_1 REG(0x02, 0x00) /* read/write */
+# define PLL_SERIAL_1_SRL_FDN (1 << 0)
+# define PLL_SERIAL_1_SRL_IZ(x) (((x) & 3) << 1)
+# define PLL_SERIAL_1_SRL_MAN_IZ (1 << 6)
+#define REG_PLL_SERIAL_2 REG(0x02, 0x01) /* read/write */
+# define PLL_SERIAL_2_SRL_NOSC(x) (((x) & 3) << 0)
+# define PLL_SERIAL_2_SRL_PR(x) (((x) & 0xf) << 4)
+#define REG_PLL_SERIAL_3 REG(0x02, 0x02) /* read/write */
+# define PLL_SERIAL_3_SRL_CCIR (1 << 0)
+# define PLL_SERIAL_3_SRL_DE (1 << 2)
+# define PLL_SERIAL_3_SRL_PXIN_SEL (1 << 4)
+#define REG_SERIALIZER REG(0x02, 0x03) /* read/write */
+#define REG_BUFFER_OUT REG(0x02, 0x04) /* read/write */
+#define REG_PLL_SCG1 REG(0x02, 0x05) /* read/write */
+#define REG_PLL_SCG2 REG(0x02, 0x06) /* read/write */
+#define REG_PLL_SCGN1 REG(0x02, 0x07) /* read/write */
+#define REG_PLL_SCGN2 REG(0x02, 0x08) /* read/write */
+#define REG_PLL_SCGR1 REG(0x02, 0x09) /* read/write */
+#define REG_PLL_SCGR2 REG(0x02, 0x0a) /* read/write */
+#define REG_AUDIO_DIV REG(0x02, 0x0e) /* read/write */
+#define REG_SEL_CLK REG(0x02, 0x11) /* read/write */
+# define SEL_CLK_SEL_CLK1 (1 << 0)
+# define SEL_CLK_SEL_VRF_CLK(x) (((x) & 3) << 1)
+# define SEL_CLK_ENA_SC_CLK (1 << 3)
+#define REG_ANA_GENERAL REG(0x02, 0x12) /* read/write */
+
+
+/* Page 09h: EDID Control */
+#define REG_EDID_DATA_0 REG(0x09, 0x00) /* read */
+/* next 127 successive registers are the EDID block */
+#define REG_EDID_CTRL REG(0x09, 0xfa) /* read/write */
+#define REG_DDC_ADDR REG(0x09, 0xfb) /* read/write */
+#define REG_DDC_OFFS REG(0x09, 0xfc) /* read/write */
+#define REG_DDC_SEGM_ADDR REG(0x09, 0xfd) /* read/write */
+#define REG_DDC_SEGM REG(0x09, 0xfe) /* read/write */
+
+
+/* Page 10h: information frames and packets */
+
+
+/* Page 11h: audio settings and content info packets */
+#define REG_AIP_CNTRL_0 REG(0x11, 0x00) /* read/write */
+# define AIP_CNTRL_0_RST_FIFO (1 << 0)
+# define AIP_CNTRL_0_SWAP (1 << 1)
+# define AIP_CNTRL_0_LAYOUT (1 << 2)
+# define AIP_CNTRL_0_ACR_MAN (1 << 5)
+# define AIP_CNTRL_0_RST_CTS (1 << 6)
+#define REG_ENC_CNTRL REG(0x11, 0x0d) /* read/write */
+# define ENC_CNTRL_RST_ENC (1 << 0)
+# define ENC_CNTRL_RST_SEL (1 << 1)
+# define ENC_CNTRL_CTL_CODE(x) (((x) & 3) << 2)
+
+
+/* Page 12h: HDCP and OTP */
+#define REG_TX3 REG(0x12, 0x9a) /* read/write */
+#define REG_TX33 REG(0x12, 0xb8) /* read/write */
+# define TX33_HDMI (1 << 1)
+
+
+/* Page 13h: Gamut related metadata packets */
+
+
+
+/* CEC registers: (not paged)
+ */
+#define REG_CEC_FRO_IM_CLK_CTRL 0xfb /* read/write */
+# define CEC_FRO_IM_CLK_CTRL_GHOST_DIS (1 << 7)
+# define CEC_FRO_IM_CLK_CTRL_ENA_OTP (1 << 6)
+# define CEC_FRO_IM_CLK_CTRL_IMCLK_SEL (1 << 1)
+# define CEC_FRO_IM_CLK_CTRL_FRO_DIV (1 << 0)
+#define REG_CEC_RXSHPDLEV 0xfe /* read */
+# define CEC_RXSHPDLEV_RXSENS (1 << 0)
+# define CEC_RXSHPDLEV_HPD (1 << 1)
+
+#define REG_CEC_ENAMODS 0xff /* read/write */
+# define CEC_ENAMODS_DIS_FRO (1 << 6)
+# define CEC_ENAMODS_DIS_CCLK (1 << 5)
+# define CEC_ENAMODS_EN_RXSENS (1 << 2)
+# define CEC_ENAMODS_EN_HDMI (1 << 1)
+# define CEC_ENAMODS_EN_CEC (1 << 0)
+
+
+/* Device versions: */
+#define TDA9989N2 0x0101
+#define TDA19989 0x0201
+#define TDA19989N2 0x0202
+#define TDA19988 0x0301
+
+static void
+cec_write(struct drm_encoder *encoder, uint16_t addr, uint8_t val)
+{
+ struct i2c_client *client = to_tda998x_priv(encoder)->cec;
+ uint8_t buf[] = {addr, val};
+ int ret;
+
+ ret = i2c_master_send(client, buf, ARRAY_SIZE(buf));
+ if (ret < 0)
+ dev_err(&client->dev, "Error %d writing to cec:0x%x\n", ret, addr);
+}
+
+static uint8_t
+cec_read(struct drm_encoder *encoder, uint8_t addr)
+{
+ struct i2c_client *client = to_tda998x_priv(encoder)->cec;
+ uint8_t val;
+ int ret;
+
+ ret = i2c_master_send(client, &addr, sizeof(addr));
+ if (ret < 0)
+ goto fail;
+
+ ret = i2c_master_recv(client, &val, sizeof(val));
+ if (ret < 0)
+ goto fail;
+
+ return val;
+
+fail:
+ dev_err(&client->dev, "Error %d reading from cec:0x%x\n", ret, addr);
+ return 0;
+}
+
+static void
+set_page(struct drm_encoder *encoder, uint16_t reg)
+{
+ struct tda998x_priv *priv = to_tda998x_priv(encoder);
+
+ if (REG2PAGE(reg) != priv->current_page) {
+ struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
+ uint8_t buf[] = {
+ REG_CURPAGE, REG2PAGE(reg)
+ };
+ int ret = i2c_master_send(client, buf, sizeof(buf));
+ if (ret < 0)
+ dev_err(&client->dev, "Error %d writing to REG_CURPAGE\n", ret);
+
+ priv->current_page = REG2PAGE(reg);
+ }
+}
+
+static int
+reg_read_range(struct drm_encoder *encoder, uint16_t reg, char *buf, int cnt)
+{
+ struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
+ uint8_t addr = REG2ADDR(reg);
+ int ret;
+
+ set_page(encoder, reg);
+
+ ret = i2c_master_send(client, &addr, sizeof(addr));
+ if (ret < 0)
+ goto fail;
+
+ ret = i2c_master_recv(client, buf, cnt);
+ if (ret < 0)
+ goto fail;
+
+ return ret;
+
+fail:
+ dev_err(&client->dev, "Error %d reading from 0x%x\n", ret, reg);
+ return ret;
+}
+
+static uint8_t
+reg_read(struct drm_encoder *encoder, uint16_t reg)
+{
+ uint8_t val = 0;
+ reg_read_range(encoder, reg, &val, sizeof(val));
+ return val;
+}
+
+static void
+reg_write(struct drm_encoder *encoder, uint16_t reg, uint8_t val)
+{
+ struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
+ uint8_t buf[] = {REG2ADDR(reg), val};
+ int ret;
+
+ set_page(encoder, reg);
+
+ ret = i2c_master_send(client, buf, ARRAY_SIZE(buf));
+ if (ret < 0)
+ dev_err(&client->dev, "Error %d writing to 0x%x\n", ret, reg);
+}
+
+static void
+reg_write16(struct drm_encoder *encoder, uint16_t reg, uint16_t val)
+{
+ struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
+ uint8_t buf[] = {REG2ADDR(reg), val >> 8, val};
+ int ret;
+
+ set_page(encoder, reg);
+
+ ret = i2c_master_send(client, buf, ARRAY_SIZE(buf));
+ if (ret < 0)
+ dev_err(&client->dev, "Error %d writing to 0x%x\n", ret, reg);
+}
+
+static void
+reg_set(struct drm_encoder *encoder, uint16_t reg, uint8_t val)
+{
+ reg_write(encoder, reg, reg_read(encoder, reg) | val);
+}
+
+static void
+reg_clear(struct drm_encoder *encoder, uint16_t reg, uint8_t val)
+{
+ reg_write(encoder, reg, reg_read(encoder, reg) & ~val);
+}
+
+static void
+tda998x_reset(struct drm_encoder *encoder)
+{
+ /* reset audio and i2c master: */
+ reg_set(encoder, REG_SOFTRESET, SOFTRESET_AUDIO | SOFTRESET_I2C_MASTER);
+ msleep(50);
+ reg_clear(encoder, REG_SOFTRESET, SOFTRESET_AUDIO | SOFTRESET_I2C_MASTER);
+ msleep(50);
+
+ /* reset transmitter: */
+ reg_set(encoder, REG_MAIN_CNTRL0, MAIN_CNTRL0_SR);
+ reg_clear(encoder, REG_MAIN_CNTRL0, MAIN_CNTRL0_SR);
+
+ /* PLL registers common configuration */
+ reg_write(encoder, REG_PLL_SERIAL_1, 0x00);
+ reg_write(encoder, REG_PLL_SERIAL_2, PLL_SERIAL_2_SRL_NOSC(1));
+ reg_write(encoder, REG_PLL_SERIAL_3, 0x00);
+ reg_write(encoder, REG_SERIALIZER, 0x00);
+ reg_write(encoder, REG_BUFFER_OUT, 0x00);
+ reg_write(encoder, REG_PLL_SCG1, 0x00);
+ reg_write(encoder, REG_AUDIO_DIV, 0x03);
+ reg_write(encoder, REG_SEL_CLK, SEL_CLK_SEL_CLK1 | SEL_CLK_ENA_SC_CLK);
+ reg_write(encoder, REG_PLL_SCGN1, 0xfa);
+ reg_write(encoder, REG_PLL_SCGN2, 0x00);
+ reg_write(encoder, REG_PLL_SCGR1, 0x5b);
+ reg_write(encoder, REG_PLL_SCGR2, 0x00);
+ reg_write(encoder, REG_PLL_SCG2, 0x10);
+}
+
+/* DRM encoder functions */
+
+static void
+tda998x_encoder_set_config(struct drm_encoder *encoder, void *params)
+{
+}
+
+static void
+tda998x_encoder_dpms(struct drm_encoder *encoder, int mode)
+{
+ struct tda998x_priv *priv = to_tda998x_priv(encoder);
+
+ /* we only care about on or off: */
+ if (mode != DRM_MODE_DPMS_ON)
+ mode = DRM_MODE_DPMS_OFF;
+
+ if (mode == priv->dpms)
+ return;
+
+ switch (mode) {
+ case DRM_MODE_DPMS_ON:
+ /* enable audio and video ports */
+ reg_write(encoder, REG_ENA_AP, 0xff);
+ reg_write(encoder, REG_ENA_VP_0, 0xff);
+ reg_write(encoder, REG_ENA_VP_1, 0xff);
+ reg_write(encoder, REG_ENA_VP_2, 0xff);
+ /* set muxing after enabling ports: */
+ reg_write(encoder, REG_VIP_CNTRL_0,
+ VIP_CNTRL_0_SWAP_A(2) | VIP_CNTRL_0_SWAP_B(3));
+ reg_write(encoder, REG_VIP_CNTRL_1,
+ VIP_CNTRL_1_SWAP_C(0) | VIP_CNTRL_1_SWAP_D(1));
+ reg_write(encoder, REG_VIP_CNTRL_2,
+ VIP_CNTRL_2_SWAP_E(4) | VIP_CNTRL_2_SWAP_F(5));
+ break;
+ case DRM_MODE_DPMS_OFF:
+ /* disable audio and video ports */
+ reg_write(encoder, REG_ENA_AP, 0x00);
+ reg_write(encoder, REG_ENA_VP_0, 0x00);
+ reg_write(encoder, REG_ENA_VP_1, 0x00);
+ reg_write(encoder, REG_ENA_VP_2, 0x00);
+ break;
+ }
+
+ priv->dpms = mode;
+}
+
+static void
+tda998x_encoder_save(struct drm_encoder *encoder)
+{
+ DBG("");
+}
+
+static void
+tda998x_encoder_restore(struct drm_encoder *encoder)
+{
+ DBG("");
+}
+
+static bool
+tda998x_encoder_mode_fixup(struct drm_encoder *encoder,
+ const struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+ return true;
+}
+
+static int
+tda998x_encoder_mode_valid(struct drm_encoder *encoder,
+ struct drm_display_mode *mode)
+{
+ return MODE_OK;
+}
+
+static void
+tda998x_encoder_mode_set(struct drm_encoder *encoder,
+ struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+ struct tda998x_priv *priv = to_tda998x_priv(encoder);
+ uint16_t hs_start, hs_end, line_start, line_end;
+ uint16_t vwin_start, vwin_end, de_start, de_end;
+ uint16_t ref_pix, ref_line, pix_start2;
+ uint8_t reg, div, rep;
+
+ hs_start = mode->hsync_start - mode->hdisplay;
+ hs_end = mode->hsync_end - mode->hdisplay;
+ line_start = 1;
+ line_end = 1 + mode->vsync_end - mode->vsync_start;
+ vwin_start = mode->vtotal - mode->vsync_start;
+ vwin_end = vwin_start + mode->vdisplay;
+ de_start = mode->htotal - mode->hdisplay;
+ de_end = mode->htotal;
+
+ pix_start2 = 0;
+ if (mode->flags & DRM_MODE_FLAG_INTERLACE)
+ pix_start2 = (mode->htotal / 2) + hs_start;
+
+ /* TODO how is this value calculated? It is 2 for all common
+ * formats in the tables in out of tree nxp driver (assuming
+ * I've properly deciphered their byzantine table system)
+ */
+ ref_line = 2;
+
+ /* this might changes for other color formats from the CRTC: */
+ ref_pix = 3 + hs_start;
+
+ div = 148500 / mode->clock;
+
+ DBG("clock=%d, div=%u", mode->clock, div);
+ DBG("hs_start=%u, hs_end=%u, line_start=%u, line_end=%u",
+ hs_start, hs_end, line_start, line_end);
+ DBG("vwin_start=%u, vwin_end=%u, de_start=%u, de_end=%u",
+ vwin_start, vwin_end, de_start, de_end);
+ DBG("ref_line=%u, ref_pix=%u, pix_start2=%u",
+ ref_line, ref_pix, pix_start2);
+
+ /* mute the audio FIFO: */
+ reg_set(encoder, REG_AIP_CNTRL_0, AIP_CNTRL_0_RST_FIFO);
+
+ /* set HDMI HDCP mode off: */
+ reg_set(encoder, REG_TBG_CNTRL_1, TBG_CNTRL_1_DWIN_DIS);
+ reg_clear(encoder, REG_TX33, TX33_HDMI);
+
+ reg_write(encoder, REG_ENC_CNTRL, ENC_CNTRL_CTL_CODE(0));
+ reg_write(encoder, REG_HVF_CNTRL_0, HVF_CNTRL_0_PREFIL(0) |
+ HVF_CNTRL_0_INTPOL(0));
+ reg_write(encoder, REG_VIP_CNTRL_5, VIP_CNTRL_5_SP_CNT(0));
+ reg_write(encoder, REG_VIP_CNTRL_4, VIP_CNTRL_4_BLANKIT(0) |
+ VIP_CNTRL_4_BLC(0));
+ reg_clear(encoder, REG_PLL_SERIAL_3, PLL_SERIAL_3_SRL_CCIR);
+
+ reg_clear(encoder, REG_PLL_SERIAL_1, PLL_SERIAL_1_SRL_MAN_IZ);
+ reg_clear(encoder, REG_PLL_SERIAL_3, PLL_SERIAL_3_SRL_DE);
+ reg_write(encoder, REG_SERIALIZER, 0);
+ reg_write(encoder, REG_HVF_CNTRL_1, HVF_CNTRL_1_VQR(0));
+
+ /* TODO enable pixel repeat for pixel rates less than 25Msamp/s */
+ rep = 0;
+ reg_write(encoder, REG_RPT_CNTRL, 0);
+ reg_write(encoder, REG_SEL_CLK, SEL_CLK_SEL_VRF_CLK(0) |
+ SEL_CLK_SEL_CLK1 | SEL_CLK_ENA_SC_CLK);
+
+ reg_write(encoder, REG_PLL_SERIAL_2, PLL_SERIAL_2_SRL_NOSC(div) |
+ PLL_SERIAL_2_SRL_PR(rep));
+
+ reg_write16(encoder, REG_VS_PIX_STRT_2_MSB, pix_start2);
+ reg_write16(encoder, REG_VS_PIX_END_2_MSB, pix_start2);
+
+ /* set color matrix bypass flag: */
+ reg_set(encoder, REG_MAT_CONTRL, MAT_CONTRL_MAT_BP);
+
+ /* set BIAS tmds value: */
+ reg_write(encoder, REG_ANA_GENERAL, 0x09);
+
+ reg_clear(encoder, REG_TBG_CNTRL_0, TBG_CNTRL_0_SYNC_MTHD);
+
+ reg_write(encoder, REG_VIP_CNTRL_3, 0);
+ reg_set(encoder, REG_VIP_CNTRL_3, VIP_CNTRL_3_SYNC_HS);
+ if (mode->flags & DRM_MODE_FLAG_NVSYNC)
+ reg_set(encoder, REG_VIP_CNTRL_3, VIP_CNTRL_3_V_TGL);
+
+ if (mode->flags & DRM_MODE_FLAG_NHSYNC)
+ reg_set(encoder, REG_VIP_CNTRL_3, VIP_CNTRL_3_H_TGL);
+
+ reg_write(encoder, REG_VIDFORMAT, 0x00);
+ reg_write16(encoder, REG_NPIX_MSB, mode->htotal - 1);
+ reg_write16(encoder, REG_NLINE_MSB, mode->vtotal - 1);
+ reg_write16(encoder, REG_VS_LINE_STRT_1_MSB, line_start);
+ reg_write16(encoder, REG_VS_LINE_END_1_MSB, line_end);
+ reg_write16(encoder, REG_VS_PIX_STRT_1_MSB, hs_start);
+ reg_write16(encoder, REG_VS_PIX_END_1_MSB, hs_start);
+ reg_write16(encoder, REG_HS_PIX_START_MSB, hs_start);
+ reg_write16(encoder, REG_HS_PIX_STOP_MSB, hs_end);
+ reg_write16(encoder, REG_VWIN_START_1_MSB, vwin_start);
+ reg_write16(encoder, REG_VWIN_END_1_MSB, vwin_end);
+ reg_write16(encoder, REG_DE_START_MSB, de_start);
+ reg_write16(encoder, REG_DE_STOP_MSB, de_end);
+
+ if (priv->rev == TDA19988) {
+ /* let incoming pixels fill the active space (if any) */
+ reg_write(encoder, REG_ENABLE_SPACE, 0x01);
+ }
+
+ reg_write16(encoder, REG_REFPIX_MSB, ref_pix);
+ reg_write16(encoder, REG_REFLINE_MSB, ref_line);
+
+ reg = TBG_CNTRL_1_VHX_EXT_DE |
+ TBG_CNTRL_1_VHX_EXT_HS |
+ TBG_CNTRL_1_VHX_EXT_VS |
+ TBG_CNTRL_1_DWIN_DIS | /* HDCP off */
+ TBG_CNTRL_1_VH_TGL_2;
+ if (mode->flags & (DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC))
+ reg |= TBG_CNTRL_1_VH_TGL_0;
+ reg_set(encoder, REG_TBG_CNTRL_1, reg);
+
+ /* must be last register set: */
+ reg_clear(encoder, REG_TBG_CNTRL_0, TBG_CNTRL_0_SYNC_ONCE);
+}
+
+static enum drm_connector_status
+tda998x_encoder_detect(struct drm_encoder *encoder,
+ struct drm_connector *connector)
+{
+ uint8_t val = cec_read(encoder, REG_CEC_RXSHPDLEV);
+ return (val & CEC_RXSHPDLEV_HPD) ? connector_status_connected :
+ connector_status_disconnected;
+}
+
+static int
+read_edid_block(struct drm_encoder *encoder, uint8_t *buf, int blk)
+{
+ uint8_t offset, segptr;
+ int ret, i;
+
+ /* enable EDID read irq: */
+ reg_set(encoder, REG_INT_FLAGS_2, INT_FLAGS_2_EDID_BLK_RD);
+
+ offset = (blk & 1) ? 128 : 0;
+ segptr = blk / 2;
+
+ reg_write(encoder, REG_DDC_ADDR, 0xa0);
+ reg_write(encoder, REG_DDC_OFFS, offset);
+ reg_write(encoder, REG_DDC_SEGM_ADDR, 0x60);
+ reg_write(encoder, REG_DDC_SEGM, segptr);
+
+ /* enable reading EDID: */
+ reg_write(encoder, REG_EDID_CTRL, 0x1);
+
+ /* flag must be cleared by sw: */
+ reg_write(encoder, REG_EDID_CTRL, 0x0);
+
+ /* wait for block read to complete: */
+ for (i = 100; i > 0; i--) {
+ uint8_t val = reg_read(encoder, REG_INT_FLAGS_2);
+ if (val & INT_FLAGS_2_EDID_BLK_RD)
+ break;
+ msleep(1);
+ }
+
+ if (i == 0)
+ return -ETIMEDOUT;
+
+ ret = reg_read_range(encoder, REG_EDID_DATA_0, buf, EDID_LENGTH);
+ if (ret != EDID_LENGTH) {
+ dev_err(encoder->dev->dev, "failed to read edid block %d: %d",
+ blk, ret);
+ return ret;
+ }
+
+ reg_clear(encoder, REG_INT_FLAGS_2, INT_FLAGS_2_EDID_BLK_RD);
+
+ return 0;
+}
+
+static uint8_t *
+do_get_edid(struct drm_encoder *encoder)
+{
+ int j = 0, valid_extensions = 0;
+ uint8_t *block, *new;
+ bool print_bad_edid = drm_debug & DRM_UT_KMS;
+
+ if ((block = kmalloc(EDID_LENGTH, GFP_KERNEL)) == NULL)
+ return NULL;
+
+ /* base block fetch */
+ if (read_edid_block(encoder, block, 0))
+ goto fail;
+
+ if (!drm_edid_block_valid(block, 0, print_bad_edid))
+ goto fail;
+
+ /* if there's no extensions, we're done */
+ if (block[0x7e] == 0)
+ return block;
+
+ new = krealloc(block, (block[0x7e] + 1) * EDID_LENGTH, GFP_KERNEL);
+ if (!new)
+ goto fail;
+ block = new;
+
+ for (j = 1; j <= block[0x7e]; j++) {
+ uint8_t *ext_block = block + (valid_extensions + 1) * EDID_LENGTH;
+ if (read_edid_block(encoder, ext_block, j))
+ goto fail;
+
+ if (!drm_edid_block_valid(ext_block, j, print_bad_edid))
+ goto fail;
+
+ valid_extensions++;
+ }
+
+ if (valid_extensions != block[0x7e]) {
+ block[EDID_LENGTH-1] += block[0x7e] - valid_extensions;
+ block[0x7e] = valid_extensions;
+ new = krealloc(block, (valid_extensions + 1) * EDID_LENGTH, GFP_KERNEL);
+ if (!new)
+ goto fail;
+ block = new;
+ }
+
+ return block;
+
+fail:
+ dev_warn(encoder->dev->dev, "failed to read EDID\n");
+ kfree(block);
+ return NULL;
+}
+
+static int
+tda998x_encoder_get_modes(struct drm_encoder *encoder,
+ struct drm_connector *connector)
+{
+ struct edid *edid = (struct edid *)do_get_edid(encoder);
+ int n = 0;
+
+ if (edid) {
+ drm_mode_connector_update_edid_property(connector, edid);
+ n = drm_add_edid_modes(connector, edid);
+ kfree(edid);
+ }
+
+ return n;
+}
+
+static int
+tda998x_encoder_create_resources(struct drm_encoder *encoder,
+ struct drm_connector *connector)
+{
+ DBG("");
+ return 0;
+}
+
+static int
+tda998x_encoder_set_property(struct drm_encoder *encoder,
+ struct drm_connector *connector,
+ struct drm_property *property,
+ uint64_t val)
+{
+ DBG("");
+ return 0;
+}
+
+static void
+tda998x_encoder_destroy(struct drm_encoder *encoder)
+{
+ struct tda998x_priv *priv = to_tda998x_priv(encoder);
+ drm_i2c_encoder_destroy(encoder);
+ kfree(priv);
+}
+
+static struct drm_encoder_slave_funcs tda998x_encoder_funcs = {
+ .set_config = tda998x_encoder_set_config,
+ .destroy = tda998x_encoder_destroy,
+ .dpms = tda998x_encoder_dpms,
+ .save = tda998x_encoder_save,
+ .restore = tda998x_encoder_restore,
+ .mode_fixup = tda998x_encoder_mode_fixup,
+ .mode_valid = tda998x_encoder_mode_valid,
+ .mode_set = tda998x_encoder_mode_set,
+ .detect = tda998x_encoder_detect,
+ .get_modes = tda998x_encoder_get_modes,
+ .create_resources = tda998x_encoder_create_resources,
+ .set_property = tda998x_encoder_set_property,
+};
+
+/* I2C driver functions */
+
+static int
+tda998x_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ return 0;
+}
+
+static int
+tda998x_remove(struct i2c_client *client)
+{
+ return 0;
+}
+
+static int
+tda998x_encoder_init(struct i2c_client *client,
+ struct drm_device *dev,
+ struct drm_encoder_slave *encoder_slave)
+{
+ struct drm_encoder *encoder = &encoder_slave->base;
+ struct tda998x_priv *priv;
+
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->current_page = 0;
+ priv->cec = i2c_new_dummy(client->adapter, 0x34);
+ priv->dpms = DRM_MODE_DPMS_OFF;
+
+ encoder_slave->slave_priv = priv;
+ encoder_slave->slave_funcs = &tda998x_encoder_funcs;
+
+ /* wake up the device: */
+ cec_write(encoder, REG_CEC_ENAMODS,
+ CEC_ENAMODS_EN_RXSENS | CEC_ENAMODS_EN_HDMI);
+
+ tda998x_reset(encoder);
+
+ /* read version: */
+ priv->rev = reg_read(encoder, REG_VERSION_LSB) |
+ reg_read(encoder, REG_VERSION_MSB) << 8;
+
+ /* mask off feature bits: */
+ priv->rev &= ~0x30; /* not-hdcp and not-scalar bit */
+
+ switch (priv->rev) {
+ case TDA9989N2: dev_info(dev->dev, "found TDA9989 n2"); break;
+ case TDA19989: dev_info(dev->dev, "found TDA19989"); break;
+ case TDA19989N2: dev_info(dev->dev, "found TDA19989 n2"); break;
+ case TDA19988: dev_info(dev->dev, "found TDA19988"); break;
+ default:
+ DBG("found unsupported device: %04x", priv->rev);
+ goto fail;
+ }
+
+ /* after reset, enable DDC: */
+ reg_write(encoder, REG_DDC_DISABLE, 0x00);
+
+ /* set clock on DDC channel: */
+ reg_write(encoder, REG_TX3, 39);
+
+ /* if necessary, disable multi-master: */
+ if (priv->rev == TDA19989)
+ reg_set(encoder, REG_I2C_MASTER, I2C_MASTER_DIS_MM);
+
+ cec_write(encoder, REG_CEC_FRO_IM_CLK_CTRL,
+ CEC_FRO_IM_CLK_CTRL_GHOST_DIS | CEC_FRO_IM_CLK_CTRL_IMCLK_SEL);
+
+ return 0;
+
+fail:
+ /* if encoder_init fails, the encoder slave is never registered,
+ * so cleanup here:
+ */
+ if (priv->cec)
+ i2c_unregister_device(priv->cec);
+ kfree(priv);
+ encoder_slave->slave_priv = NULL;
+ encoder_slave->slave_funcs = NULL;
+ return -ENXIO;
+}
+
+static struct i2c_device_id tda998x_ids[] = {
+ { "tda998x", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, tda998x_ids);
+
+static struct drm_i2c_encoder_driver tda998x_driver = {
+ .i2c_driver = {
+ .probe = tda998x_probe,
+ .remove = tda998x_remove,
+ .driver = {
+ .name = "tda998x",
+ },
+ .id_table = tda998x_ids,
+ },
+ .encoder_init = tda998x_encoder_init,
+};
+
+/* Module initialization */
+
+static int __init
+tda998x_init(void)
+{
+ DBG("");
+ return drm_i2c_encoder_register(THIS_MODULE, &tda998x_driver);
+}
+
+static void __exit
+tda998x_exit(void)
+{
+ DBG("");
+ drm_i2c_encoder_unregister(&tda998x_driver);
+}
+
+MODULE_DESCRIPTION("NXP Semiconductors TDA998X TMDS transmitter driver");
+
+MODULE_AUTHOR("Rob Clark <robdclark at gmail.com");
+MODULE_DESCRIPTION("NXP Semiconductors TDA998X HDMI Encoder");
+MODULE_LICENSE("GPL");
+
+module_init(tda998x_init);
+module_exit(tda998x_exit);
--
1.8.0.2
More information about the linux-arm-kernel
mailing list