[PATCH 3/4] drm/layerscape: Add sii9022a driver
Meng Yi
meng.yi at nxp.com
Mon Jan 25 20:00:32 PST 2016
The SiI9022A is an ultra low-power HDMI transmitter. It supports
resolutions from standard definition 480i/p and 576i/p all the way
to high-definition 720p, 1080i, and 1080p, the highest resolution
supported by HDTVs today. It also supports all PC resolutions up
to UXGA for netbooks
Signed-off-by: Meng Yi <meng.yi at nxp.com>
---
drivers/gpu/drm/i2c/Kconfig | 6 +
drivers/gpu/drm/i2c/Makefile | 3 +
drivers/gpu/drm/i2c/sii9022_drv.c | 449 ++++++++++++++++++++++++++++++++++++++
3 files changed, 458 insertions(+)
create mode 100644 drivers/gpu/drm/i2c/sii9022_drv.c
diff --git a/drivers/gpu/drm/i2c/Kconfig b/drivers/gpu/drm/i2c/Kconfig
index 22c7ed6..8646729 100644
--- a/drivers/gpu/drm/i2c/Kconfig
+++ b/drivers/gpu/drm/i2c/Kconfig
@@ -31,4 +31,10 @@ config DRM_I2C_NXP_TDA998X
help
Support for NXP Semiconductors TDA998X HDMI encoders.
+config DRM_I2C_SII9022
+ tristate "Silicon Image sii9022 TMDS transmitter"
+ help
+ Support for sii9022 and similar single-link (or dual-link
+ when used in pairs) TMDS transmitters.
+
endmenu
diff --git a/drivers/gpu/drm/i2c/Makefile b/drivers/gpu/drm/i2c/Makefile
index 2c72eb5..cf2e8b9 100644
--- a/drivers/gpu/drm/i2c/Makefile
+++ b/drivers/gpu/drm/i2c/Makefile
@@ -10,3 +10,6 @@ obj-$(CONFIG_DRM_I2C_SIL164) += sil164.o
tda998x-y := tda998x_drv.o
obj-$(CONFIG_DRM_I2C_NXP_TDA998X) += tda998x.o
+
+sii9022-y := sii9022_drv.o
+obj-$(CONFIG_DRM_I2C_SII9022) +=sii9022.o
diff --git a/drivers/gpu/drm/i2c/sii9022_drv.c b/drivers/gpu/drm/i2c/sii9022_drv.c
new file mode 100644
index 0000000..bc49cad
--- /dev/null
+++ b/drivers/gpu/drm/i2c/sii9022_drv.c
@@ -0,0 +1,449 @@
+/*
+ * Copyright 2015 Freescale Semiconductor, Inc.
+ *
+ * Freescale DCU drm device driver
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/fb.h>
+#include <linux/fsl_devices.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/backlight.h>
+#include <video/videomode.h>
+#include <video/of_display_timing.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_encoder_slave.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_edid.h>
+
+
+#define SII902X_INPUT_BUS_FMT 0x08
+#define SII902X_TPI_AVI_INPUT_FMT 0x09
+#define SII902X_TPI_AVI_OUTPUT_FMT 0x0A
+#define SII902X_SYS_CONTROL 0x1A
+#define SII902X_SYS_CTR_DDC_REQ BIT(2)
+#define SII902X_SYS_CTR_DDC_BUS_AVAI (BIT(2) | BIT(1))
+#define SII902X_TPI_FAMILY_DEV_ID 0x1B
+#define SII902X_TPI_DEV_REV_ID 0x1C
+#define SII902X_TPI_REV_LEVEL_ID 0x1D
+#define SII902X_POWER_STATE 0x1E
+#define SII902X_TPI_AUDIO_CFG0 0x24
+#define SII902X_TPI_AUDIO_CFG1 0x25
+#define SII902X_TPI_AUDIO_CFG2 0x26
+#define SII902X_TPI_AUDIO_CFG3 0x27
+#define SII902X_TPI_HDCP_REV 0x30
+#define SII902X_TPI_INT_ENABLE 0x3C
+#define SII902X_TPI_INT_STATUS 0x3D
+#define SII902X_TPI_INT_PLUG_IN BIT(2)
+#define SII902X_GENERAL_PURPOSE_IO0 0xBC
+#define SII902X_GENERAL_PURPOSE_IO1 0xBD
+#define SII902X_GENERAL_PURPOSE_IO2 0xBE
+#define SII902X_TRANS_MODE_DIFF 0xC7
+
+bool g_enable_hdmi;
+
+struct sii902x_data {
+ struct i2c_client *client;
+ struct delayed_work det_work;
+ struct fb_info *fbi;
+} *sii902x;
+
+#define to_sii902x_data(x) \
+ ((struct sii902x_data *)to_encoder_slave(x)->slave_priv)
+
+static struct i2c_client *sii902x_to_i2c(struct sii902x_data *sii902x)
+{
+ return sii902x->client;
+}
+
+/* HW access functions */
+static s32 sii902x_write(const struct i2c_client *client,
+ u8 command, u8 value)
+{
+ return i2c_smbus_write_byte_data(client, command, value);
+}
+
+static s32 sii902x_read(const struct i2c_client *client, u8 command)
+{
+ int val;
+
+ val = i2c_smbus_read_word_data(client, command);
+
+ return val & 0xff;
+}
+
+static void sii902x_poweron(void)
+{
+ /* Turn on DVI or HDMI */
+ sii902x_write(sii902x->client, SII902X_SYS_CONTROL, 0x00);
+}
+
+static void sii902x_poweroff(void)
+{
+ /* disable tmds before changing resolution */
+ sii902x_write(sii902x->client, SII902X_SYS_CONTROL, 0x10);
+}
+
+
+static void sii902x_chip_id(struct sii902x_data *sii902x)
+{
+ struct i2c_client *client = sii902x_to_i2c(sii902x);
+ int val;
+
+ /* read device ID */
+ val = sii902x_read(client, SII902X_TPI_FAMILY_DEV_ID);
+ pr_info("Sii902x: read id = 0x%02X", val);
+ val = sii902x_read(client, SII902X_TPI_DEV_REV_ID);
+ pr_info("-0x%02X", val);
+ val = sii902x_read(client, SII902X_TPI_REV_LEVEL_ID);
+ pr_info("-0x%02X", val);
+ val = sii902x_read(client, SII902X_TPI_HDCP_REV);
+ pr_info("-0x%02X\n", val);
+}
+
+static int sii902x_initialize(struct sii902x_data *sii902x)
+{
+ struct i2c_client *client = sii902x_to_i2c(sii902x);
+ int ret, cnt;
+
+ for (cnt = 0; cnt < 5; cnt++) {
+ /* Set 902x in hardware TPI mode on and jump out of D3 state */
+ ret = sii902x_write(client, SII902X_TRANS_MODE_DIFF, 0x00);
+ if (ret < 0)
+ break;
+ }
+ if (ret != 0)
+ dev_err(&client->dev, "cound not find device\n");
+
+ return ret;
+}
+
+static void sii902x_enable_source(struct sii902x_data *sii902x)
+{
+ struct i2c_client *client = sii902x_to_i2c(sii902x);
+ int val;
+
+ sii902x_write(client, SII902X_GENERAL_PURPOSE_IO0, 0x01);
+ sii902x_write(client, SII902X_GENERAL_PURPOSE_IO1, 0x82);
+ val = sii902x_read(client, SII902X_GENERAL_PURPOSE_IO2);
+ val |= 0x1;
+ sii902x_write(client, SII902X_GENERAL_PURPOSE_IO2, val);
+}
+
+static void sii902x_power_up_tx(struct sii902x_data *sii902x)
+{
+ struct i2c_client *client = sii902x_to_i2c(sii902x);
+ int val;
+
+ val = sii902x_read(client, SII902X_POWER_STATE);
+ val &= ~0x3;
+ sii902x_write(client, SII902X_POWER_STATE, val);
+}
+
+static int sii902x_get_edid_preconfig(void)
+{
+ int old, dat, ret = 0, cnt = 100;
+
+ old = sii902x_read(sii902x->client, SII902X_SYS_CONTROL);
+
+ sii902x_write(sii902x->client, SII902X_SYS_CONTROL,
+ old | SII902X_SYS_CTR_DDC_REQ);
+ do {
+ cnt--;
+ msleep(20);
+ dat = sii902x_read(sii902x->client, SII902X_SYS_CONTROL);
+ } while ((!(dat & 0x2)) && cnt);
+
+ if (!cnt) {
+ ret = -1;
+ goto done;
+ }
+
+ sii902x_write(sii902x->client, SII902X_SYS_CONTROL,
+ old | SII902X_SYS_CTR_DDC_BUS_AVAI);
+
+done:
+ sii902x_write(sii902x->client, SII902X_SYS_CONTROL, old);
+ return ret;
+}
+
+static int __init enable_hdmi_setup(char *str)
+{
+ g_enable_hdmi = true;
+
+ return 1;
+}
+
+__setup("hdmi", enable_hdmi_setup);
+
+static irqreturn_t sii902x_detect_handler(int irq, void *data)
+{
+ if (g_enable_hdmi)
+ g_enable_hdmi = false;
+
+ return IRQ_HANDLED;
+}
+
+static int sii902x_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct i2c_adapter *adap = to_i2c_adapter(client->dev.parent);
+ int ret, err;
+
+ if (!g_enable_hdmi)
+ return -EPERM;
+
+ if (!i2c_check_functionality(adap, I2C_FUNC_SMBUS_BYTE)) {
+ dev_err(&client->dev, "i2c_check_functionality error\n");
+ return -ENODEV;
+ }
+
+ sii902x = devm_kzalloc(&client->dev, sizeof(*sii902x), GFP_KERNEL);
+ if (!sii902x)
+ return -ENOMEM;
+
+ sii902x->client = client;
+ i2c_set_clientdata(client, sii902x);
+
+ err = sii902x_initialize(sii902x);
+ if (err)
+ return err;
+
+ sii902x_chip_id(sii902x);
+ sii902x_power_up_tx(sii902x);
+ sii902x_enable_source(sii902x);
+
+ if (sii902x_get_edid_preconfig() < 0)
+ dev_warn(&client->dev, "Read edid preconfig failed\n");
+
+ if (client->irq) {
+ ret = devm_request_irq(&client->dev, client->irq,
+ sii902x_detect_handler, 0,
+ "SII902x_det", sii902x);
+ if (ret < 0)
+ dev_warn(&client->dev,
+ "cound not request det irq %d\n",
+ client->irq);
+ else {
+ /*enable cable hot plug irq*/
+ sii902x_write(client, SII902X_TPI_INT_ENABLE, 0x01);
+ }
+ }
+
+ return 0;
+}
+
+static int sii902x_remove(struct i2c_client *client)
+{
+ sii902x_poweroff();
+ return 0;
+}
+
+/* DRM encoder functions */
+
+static void
+sii902x_encoder_dpms(struct drm_encoder *encoder, int mode)
+{
+ if (mode == DRM_MODE_DPMS_ON)
+ sii902x_poweron();
+ else
+ sii902x_poweroff();
+}
+
+
+static int
+sii902x_encoder_mode_valid(struct drm_encoder *encoder,
+ struct drm_display_mode *mode)
+{
+ return 0;
+}
+
+static void
+sii902x_encoder_mode_set(struct drm_encoder *encoder,
+ struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+ struct videomode vm;
+ u16 data[4];
+ u32 refresh;
+ u8 *tmp;
+ int i;
+
+ /* Power up */
+ sii902x_power_up_tx(sii902x);
+
+ drm_display_mode_to_videomode(mode, &vm);
+ data[0] = PICOS2KHZ(vm.pixelclock) / 10;
+ data[2] = vm.hsync_len + vm.hback_porch +
+ vm.hactive + vm.hfront_porch;
+ data[3] = vm.vsync_len + vm.vfront_porch +
+ vm.vactive + vm.vback_porch;
+ refresh = data[2] * data[3];
+ refresh = (PICOS2KHZ(vm.pixelclock) * 1000) / refresh;
+ data[1] = refresh * 100;
+
+ tmp = (u8 *)data;
+ for (i = 0; i < 8; i++)
+ sii902x_write(sii902x->client, i, tmp[i]);
+
+ /* input bus/pixel: full pixel wide (24bit), rising edge */
+ sii902x_write(sii902x->client, SII902X_INPUT_BUS_FMT, 0x70);
+ /* Set input format to RGB */
+ sii902x_write(sii902x->client, SII902X_TPI_AVI_INPUT_FMT, 0x00);
+ /* set output format to RGB */
+ sii902x_write(sii902x->client, SII902X_TPI_AVI_OUTPUT_FMT, 0x00);
+ /* audio setup */
+ sii902x_write(sii902x->client, SII902X_TPI_AUDIO_CFG1, 0x00);
+ sii902x_write(sii902x->client, SII902X_TPI_AUDIO_CFG2, 0x40);
+ sii902x_write(sii902x->client, SII902X_TPI_AUDIO_CFG3, 0x00);
+}
+
+struct edid *sii902x_drm_get_edid(struct drm_connector *connector,
+ struct i2c_adapter *adapter)
+{
+ int old, dat, cnt = 100;
+ struct edid *edid;
+
+ old = sii902x_read(sii902x->client, SII902X_SYS_CONTROL);
+
+ sii902x_write(sii902x->client, SII902X_SYS_CONTROL,
+ old | SII902X_SYS_CTR_DDC_REQ);
+ do {
+ cnt--;
+ msleep(20);
+ dat = sii902x_read(sii902x->client, SII902X_SYS_CONTROL);
+ } while ((!(dat & 0x2)) && cnt);
+
+ if (!cnt) {
+ edid = NULL;
+ goto done;
+ }
+
+ sii902x_write(sii902x->client, SII902X_SYS_CONTROL,
+ old | SII902X_SYS_CTR_DDC_BUS_AVAI);
+
+ /* edid reading */
+ edid = drm_get_edid(connector, adapter);
+
+ cnt = 100;
+ do {
+ cnt--;
+ sii902x_write(sii902x->client, SII902X_SYS_CONTROL,
+ old & ~SII902X_SYS_CTR_DDC_BUS_AVAI);
+ msleep(20);
+ dat = sii902x_read(sii902x->client, SII902X_SYS_CONTROL);
+ } while ((dat & 0x6) && cnt);
+
+ if (!cnt)
+ edid = NULL;
+
+done:
+ sii902x_write(sii902x->client, SII902X_SYS_CONTROL, old);
+ return edid;
+}
+
+static int
+sii902x_encoder_get_modes(struct drm_encoder *encoder,
+ struct drm_connector *connector)
+{
+ struct drm_device *dev = connector->dev;
+ struct i2c_adapter *adap = to_i2c_adapter(sii902x->client->dev.parent);
+ struct edid *edid;
+ struct drm_display_mode *mode;
+ int ret;
+
+ edid = sii902x_drm_get_edid(connector, adap);
+ if (edid) {
+ drm_mode_connector_update_edid_property(connector, edid);
+ ret = drm_add_edid_modes(connector, edid);
+ kfree(edid);
+ } else {
+ dev_dbg(dev->dev, "failed to get edid\n");
+ }
+
+ list_for_each_entry(mode, &connector->probed_modes, head) {
+ if (mode->hdisplay == 1024 || mode->vdisplay == 768)
+ mode->type |= DRM_MODE_TYPE_PREFERRED;
+ else
+ mode->type &= ~DRM_MODE_TYPE_PREFERRED;
+ }
+
+ return ret;
+}
+
+static struct drm_encoder_slave_funcs sii902x_encoder_funcs = {
+ .dpms = sii902x_encoder_dpms,
+ .mode_valid = sii902x_encoder_mode_valid,
+ .mode_set = sii902x_encoder_mode_set,
+ .get_modes = sii902x_encoder_get_modes,
+};
+static int
+sii902x_encoder_init(struct i2c_client *client,
+ struct drm_device *dev,
+ struct drm_encoder_slave *encoder)
+{
+
+ encoder->slave_funcs = &sii902x_encoder_funcs;
+
+ return 0;
+}
+static const struct i2c_device_id sii902x_id[] = {
+ { "sii902x", 0 },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, sii902x_id);
+
+static const struct of_device_id sii902x_dt_ids[] = {
+ { .compatible = "sil,sii9022a", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, sii902x_dt_ids);
+
+static struct drm_i2c_encoder_driver sii902x_driver = {
+ .i2c_driver = {
+ .probe = sii902x_probe,
+ .remove = sii902x_remove,
+ .driver = {
+ .name = "sii902x",
+ .owner = THIS_MODULE,
+ .of_match_table = sii902x_dt_ids,
+ },
+ .id_table = sii902x_id,
+ },
+ .encoder_init = sii902x_encoder_init,
+};
+
+/* Module initialization */
+
+static int __init sii902x_init(void)
+{
+ return drm_i2c_encoder_register(THIS_MODULE, &sii902x_driver);
+}
+
+static void __exit sii902x_exit(void)
+{
+ drm_i2c_encoder_unregister(&sii902x_driver);
+}
+
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("SII902x DVI/HDMI driver");
+MODULE_LICENSE("GPL");
+
+
+module_init(sii902x_init);
+module_exit(sii902x_exit);
--
2.1.0.27.g96db324
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