[PATCH 4/5] DRM: Add support for the sii902x HDMI/DVI encoder
Alex Deucher
alexdeucher at gmail.com
Fri Jul 8 16:42:34 EDT 2011
On Tue, Jun 7, 2011 at 6:45 AM, Sascha Hauer <s.hauer at pengutronix.de> wrote:
> Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
> ---
> drivers/gpu/drm/Kconfig | 6 +
> drivers/gpu/drm/i2c/Makefile | 3 +
> drivers/gpu/drm/i2c/sii902x.c | 334 +++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 343 insertions(+), 0 deletions(-)
> create mode 100644 drivers/gpu/drm/i2c/sii902x.c
>
> diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
> index bcd9a27..01d5444 100644
> --- a/drivers/gpu/drm/Kconfig
> +++ b/drivers/gpu/drm/Kconfig
> @@ -166,6 +166,12 @@ config DRM_SAVAGE
> Choose this option if you have a Savage3D/4/SuperSavage/Pro/Twister
> chipset. If M is selected the module will be called savage.
>
> +config DRM_I2C_SII902X
> + tristate "sii902x"
> + depends on DRM && I2C
> + help
> + Support for sii902x DVI/HDMI encoder chips
> +
> config DRM_IMX_IPUV3
> tristate "i.MX IPUv3"
> depends on DRM && ARCH_MXC
> diff --git a/drivers/gpu/drm/i2c/Makefile b/drivers/gpu/drm/i2c/Makefile
> index 9286256..a7a8d40 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
> +
> +sii902x := sii902x_drv.o
> +obj-$(CONFIG_DRM_I2C_SII902X) += sii902x.o
> diff --git a/drivers/gpu/drm/i2c/sii902x.c b/drivers/gpu/drm/i2c/sii902x.c
> new file mode 100644
> index 0000000..7928533
> --- /dev/null
> +++ b/drivers/gpu/drm/i2c/sii902x.c
> @@ -0,0 +1,334 @@
> +/*
> + * Copyright (C) 2010 Francisco Jerez.
Update the copyright?
Alex
> + * All Rights Reserved.
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining
> + * a copy of this software and associated documentation files (the
> + * "Software"), to deal in the Software without restriction, including
> + * without limitation the rights to use, copy, modify, merge, publish,
> + * distribute, sublicense, and/or sell copies of the Software, and to
> + * permit persons to whom the Software is furnished to do so, subject to
> + * the following conditions:
> + *
> + * The above copyright notice and this permission notice (including the
> + * next paragraph) shall be included in all copies or substantial
> + * portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
> + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
> + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
> + * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
> + * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
> + * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
> + * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
> + *
> + */
> +
> +#include <drm/drmP.h>
> +#include <drm/drm_crtc_helper.h>
> +#include <drm/drm_encoder_slave.h>
> +#include <drm/drm_encon.h>
> +
> +struct sii902x_encoder_params {
> +};
> +
> +struct sii902x_priv {
> + struct sii902x_encoder_params config;
> + struct i2c_client *client;
> + struct drm_encoder_connector encon;
> +};
> +
> +#define to_sii902x(x) container_of(x, struct sii902x_priv, encon)
> +
> +static int sii902x_write(struct i2c_client *client, uint8_t addr, uint8_t val)
> +{
> + int ret;
> +
> + ret = i2c_smbus_write_byte_data(client, addr, val);
> + if (ret) {
> + dev_dbg(&client->dev, "%s failed with %d\n", __func__, ret);
> + }
> + return ret;
> +}
> +
> +static uint8_t sii902x_read(struct i2c_client *client, uint8_t addr)
> +{
> + int dat;
> +
> + dat = i2c_smbus_read_byte_data(client, addr);
> +
> + return dat;
> +}
> +
> +static int hdmi_cap = 0; /* FIXME */
> +
> +static void sii902x_poweron(struct sii902x_priv *priv)
> +{
> + struct i2c_client *client = priv->client;
> +
> + /* Turn on DVI or HDMI */
> + if (hdmi_cap)
> + sii902x_write(client, 0x1A, 0x01 | 4);
> + else
> + sii902x_write(client, 0x1A, 0x00);
> +
> + return;
> +}
> +
> +static void sii902x_poweroff(struct sii902x_priv *priv)
> +{
> + struct i2c_client *client = priv->client;
> +
> + /* disable tmds before changing resolution */
> + if (hdmi_cap)
> + sii902x_write(client, 0x1A, 0x11);
> + else
> + sii902x_write(client, 0x1A, 0x10);
> +
> + return;
> +}
> +
> +static int sii902x_get_modes(struct drm_encoder_connector *encon)
> +{
> + struct sii902x_priv *priv = to_sii902x(encon);
> + struct i2c_client *client = priv->client;
> + struct i2c_adapter *adap = client->adapter;
> + struct drm_connector *connector = &encon->connector;
> + struct edid *edid;
> + int ret;
> + int old, dat, cnt = 100;
> +
> + old = sii902x_read(client, 0x1A);
> +
> + sii902x_write(client, 0x1A, old | 0x4);
> + do {
> + cnt--;
> + msleep(10);
> + dat = sii902x_read(client, 0x1A);
> + } while ((!(dat & 0x2)) && cnt);
> +
> + if (!cnt)
> + return -ETIMEDOUT;
> +
> + sii902x_write(client, 0x1A, old | 0x06);
> +
> + edid = drm_get_edid(connector, adap);
> + if (edid) {
> + drm_mode_connector_update_edid_property(connector, edid);
> + ret = drm_add_edid_modes(connector, edid);
> + connector->display_info.raw_edid = NULL;
> + kfree(edid);
> + }
> +
> + cnt = 100;
> + do {
> + cnt--;
> + sii902x_write(client, 0x1A, old & ~0x6);
> + msleep(10);
> + dat = sii902x_read(client, 0x1A);
> + } while ((dat & 0x6) && cnt);
> +
> + if (!cnt)
> + ret = -1;
> +
> + sii902x_write(client, 0x1A, old);
> +
> + return 0;
> +}
> +
> +static irqreturn_t sii902x_detect_handler(int irq, void *data)
> +{
> + struct sii902x_priv *priv = data;
> + struct i2c_client *client = priv->client;
> + int dat;
> +
> + dat = sii902x_read(client, 0x3D);
> + if (dat & 0x1) {
> + /* cable connection changes */
> + if (dat & 0x4) {
> + printk("plugin\n");
> + } else {
> + printk("plugout\n");
> + }
> + }
> + sii902x_write(client, 0x3D, dat);
> +
> + return IRQ_HANDLED;
> +}
> +
> +
> +static int sii902x_mode_valid(struct drm_encoder_connector *encon,
> + struct drm_display_mode *mode)
> +{
> + return MODE_OK;
> +}
> +
> +static void sii902x_mode_set(struct drm_encoder_connector *encon,
> + struct drm_display_mode *mode,
> + struct drm_display_mode *adjusted_mode)
> +{
> + struct sii902x_priv *priv = to_sii902x(encon);
> + struct i2c_client *client = priv->client;
> + u16 data[4];
> + u32 refresh;
> + u8 *tmp;
> + int i;
> +
> + /* Power up */
> + sii902x_write(client, 0x1E, 0x00);
> +
> + dev_dbg(&client->dev, "%s: %dx%d, pixclk %d\n", __func__,
> + mode->hdisplay, mode->vdisplay,
> + mode->clock * 1000);
> +
> + /* set TPI video mode */
> + data[0] = mode->clock / 10;
> + data[2] = mode->htotal;
> + data[3] = mode->vtotal;
> + refresh = data[2] * data[3];
> + refresh = (mode->clock * 1000) / refresh;
> + data[1] = refresh * 100;
> + tmp = (u8 *)data;
> + for (i = 0; i < 8; i++)
> + sii902x_write(client, i, tmp[i]);
> +
> + /* input bus/pixel: full pixel wide (24bit), rising edge */
> + sii902x_write(client, 0x08, 0x70);
> + /* Set input format to RGB */
> + sii902x_write(client, 0x09, 0x00);
> + /* set output format to RGB */
> + sii902x_write(client, 0x0A, 0x00);
> + /* audio setup */
> + sii902x_write(client, 0x25, 0x00);
> + sii902x_write(client, 0x26, 0x40);
> + sii902x_write(client, 0x27, 0x00);
> +}
> +
> +static void sii902x_dpms(struct drm_encoder_connector *encon, int mode)
> +{
> + struct sii902x_priv *priv = to_sii902x(encon);
> +
> + if (mode)
> + sii902x_poweroff(priv);
> + else
> + sii902x_poweron(priv);
> +}
> +
> +static void sii902x_prepare(struct drm_encoder_connector *encon)
> +{
> + struct sii902x_priv *priv = to_sii902x(encon);
> +
> + sii902x_poweroff(priv);
> +}
> +
> +static void sii902x_commit(struct drm_encoder_connector *encon)
> +{
> + struct sii902x_priv *priv = to_sii902x(encon);
> +
> + sii902x_poweron(priv);
> +}
> +
> +struct drm_encoder_connector_funcs sii902x_funcs = {
> + .dpms = sii902x_dpms,
> + .prepare = sii902x_prepare,
> + .commit = sii902x_commit,
> + .get_modes = sii902x_get_modes,
> + .mode_valid = sii902x_mode_valid,
> + .mode_set = sii902x_mode_set,
> +};
> +
> +/* I2C driver functions */
> +
> +static int
> +sii902x_probe(struct i2c_client *client, const struct i2c_device_id *id)
> +{
> + int dat, ret;
> + struct sii902x_priv *priv;
> + const char *drm_name = "imx-drm.0"; /* FIXME: pass from pdata */
> + int encon_id = 0; /* FIXME: pass from pdata */
> +
> + priv = kzalloc(sizeof(*priv), GFP_KERNEL);
> + if (!priv)
> + return -ENOMEM;
> +
> + priv->client = client;
> +
> + /* Set 902x in hardware TPI mode on and jump out of D3 state */
> + if (sii902x_write(client, 0xc7, 0x00) < 0) {
> + dev_err(&client->dev, "SII902x: cound not find device\n");
> + return -ENODEV;
> + }
> +
> + /* read device ID */
> + dat = sii902x_read(client, 0x1b);
> + if (dat != 0xb0) {
> + dev_err(&client->dev, "not found. id is 0x%02x instead of 0xb0\n",
> + dat);
> + return -ENODEV;
> + }
> +
> + if (client->irq) {
> + ret = request_threaded_irq(client->irq, NULL, sii902x_detect_handler,
> + IRQF_TRIGGER_FALLING,
> + "SII902x_det", priv);
> + sii902x_write(client, 0x3c, 0x01);
> + }
> +
> + priv->encon.funcs = &sii902x_funcs;
> +
> + i2c_set_clientdata(client, priv);
> +
> + drm_encon_register(drm_name, encon_id, &priv->encon);
> +
> + dev_info(&client->dev, "initialized\n");
> +
> + return 0;
> +}
> +
> +static int sii902x_remove(struct i2c_client *client)
> +{
> + struct sii902x_priv *priv;
> + int ret;
> +
> + priv = i2c_get_clientdata(client);
> +
> + ret = drm_encon_unregister(&priv->encon);
> + if (ret)
> + return ret;
> +
> + kfree(priv);
> +
> + return 0;
> +}
> +
> +static struct i2c_device_id sii902x_ids[] = {
> + { "sii9022", 0 },
> + { }
> +};
> +MODULE_DEVICE_TABLE(i2c, sii902x_ids);
> +
> +static struct i2c_driver sii902x_i2c_driver = {
> + .probe = sii902x_probe,
> + .remove = sii902x_remove,
> + .driver = {
> + .name = "sii902x",
> + },
> + .id_table = sii902x_ids,
> +};
> +
> +static int __init sii902x_init(void)
> +{
> + return i2c_add_driver(&sii902x_i2c_driver);
> +}
> +
> +static void __exit sii902x_exit(void)
> +{
> + i2c_del_driver(&sii902x_i2c_driver);
> +}
> +
> +MODULE_AUTHOR("Sascha Hauer <s.hauer at pengutronix.de>");
> +MODULE_DESCRIPTION("Silicon Image sii902x HDMI transmitter driver");
> +MODULE_LICENSE("GPL");
> +
> +module_init(sii902x_init);
> +module_exit(sii902x_exit);
> --
> 1.7.5.3
>
>
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