Commit f25ee501 authored by Tomi Valkeinen's avatar Tomi Valkeinen Committed by Andrzej Hajda

drm/bridge: tc358767: add IRQ and HPD support

Add support for interrupt and hotplug handling. Both are optional.
Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: default avatarAndrzej Hajda <a.hajda@samsung.com>
Signed-off-by: default avatarAndrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190528082747.3631-24-tomi.valkeinen@ti.com
parent af9526f2
...@@ -71,6 +71,7 @@ ...@@ -71,6 +71,7 @@
/* System */ /* System */
#define TC_IDREG 0x0500 #define TC_IDREG 0x0500
#define SYSSTAT 0x0508
#define SYSCTRL 0x0510 #define SYSCTRL 0x0510
#define DP0_AUDSRC_NO_INPUT (0 << 3) #define DP0_AUDSRC_NO_INPUT (0 << 3)
#define DP0_AUDSRC_I2S_RX (1 << 3) #define DP0_AUDSRC_I2S_RX (1 << 3)
...@@ -79,9 +80,16 @@ ...@@ -79,9 +80,16 @@
#define DP0_VIDSRC_DPI_RX (2 << 0) #define DP0_VIDSRC_DPI_RX (2 << 0)
#define DP0_VIDSRC_COLOR_BAR (3 << 0) #define DP0_VIDSRC_COLOR_BAR (3 << 0)
#define GPIOM 0x0540 #define GPIOM 0x0540
#define GPIOC 0x0544
#define GPIOO 0x0548
#define GPIOI 0x054c #define GPIOI 0x054c
#define INTCTL_G 0x0560 #define INTCTL_G 0x0560
#define INTSTS_G 0x0564 #define INTSTS_G 0x0564
#define INT_SYSERR BIT(16)
#define INT_GPIO_H(x) (1 << (x == 0 ? 2 : 10))
#define INT_GPIO_LC(x) (1 << (x == 0 ? 3 : 11))
#define INT_GP0_LCNT 0x0584 #define INT_GP0_LCNT 0x0584
#define INT_GP1_LCNT 0x0588 #define INT_GP1_LCNT 0x0588
...@@ -219,6 +227,12 @@ struct tc_data { ...@@ -219,6 +227,12 @@ struct tc_data {
struct gpio_desc *sd_gpio; struct gpio_desc *sd_gpio;
struct gpio_desc *reset_gpio; struct gpio_desc *reset_gpio;
struct clk *refclk; struct clk *refclk;
/* do we have IRQ */
bool have_irq;
/* HPD pin number (0 or 1) or -ENODEV */
int hpd_pin;
}; };
static inline struct tc_data *aux_to_tc(struct drm_dp_aux *a) static inline struct tc_data *aux_to_tc(struct drm_dp_aux *a)
...@@ -1109,6 +1123,12 @@ static void tc_bridge_enable(struct drm_bridge *bridge) ...@@ -1109,6 +1123,12 @@ static void tc_bridge_enable(struct drm_bridge *bridge)
struct tc_data *tc = bridge_to_tc(bridge); struct tc_data *tc = bridge_to_tc(bridge);
int ret; int ret;
ret = tc_get_display_props(tc);
if (ret < 0) {
dev_err(tc->dev, "failed to read display props: %d\n", ret);
return;
}
ret = tc_main_link_enable(tc); ret = tc_main_link_enable(tc);
if (ret < 0) { if (ret < 0) {
dev_err(tc->dev, "main link enable error: %d\n", ret); dev_err(tc->dev, "main link enable error: %d\n", ret);
...@@ -1221,19 +1241,40 @@ static int tc_connector_get_modes(struct drm_connector *connector) ...@@ -1221,19 +1241,40 @@ static int tc_connector_get_modes(struct drm_connector *connector)
return count; return count;
} }
static void tc_connector_set_polling(struct tc_data *tc,
struct drm_connector *connector)
{
/* TODO: add support for HPD */
connector->polled = DRM_CONNECTOR_POLL_CONNECT |
DRM_CONNECTOR_POLL_DISCONNECT;
}
static const struct drm_connector_helper_funcs tc_connector_helper_funcs = { static const struct drm_connector_helper_funcs tc_connector_helper_funcs = {
.get_modes = tc_connector_get_modes, .get_modes = tc_connector_get_modes,
}; };
static enum drm_connector_status tc_connector_detect(struct drm_connector *connector,
bool force)
{
struct tc_data *tc = connector_to_tc(connector);
bool conn;
u32 val;
int ret;
if (tc->hpd_pin < 0) {
if (tc->panel)
return connector_status_connected;
else
return connector_status_unknown;
}
tc_read(GPIOI, &val);
conn = val & BIT(tc->hpd_pin);
if (conn)
return connector_status_connected;
else
return connector_status_disconnected;
err:
return connector_status_unknown;
}
static const struct drm_connector_funcs tc_connector_funcs = { static const struct drm_connector_funcs tc_connector_funcs = {
.detect = tc_connector_detect,
.fill_modes = drm_helper_probe_single_connector_modes, .fill_modes = drm_helper_probe_single_connector_modes,
.destroy = drm_connector_cleanup, .destroy = drm_connector_cleanup,
.reset = drm_atomic_helper_connector_reset, .reset = drm_atomic_helper_connector_reset,
...@@ -1248,7 +1289,7 @@ static int tc_bridge_attach(struct drm_bridge *bridge) ...@@ -1248,7 +1289,7 @@ static int tc_bridge_attach(struct drm_bridge *bridge)
struct drm_device *drm = bridge->dev; struct drm_device *drm = bridge->dev;
int ret; int ret;
/* Create eDP connector */ /* Create DP/eDP connector */
drm_connector_helper_add(&tc->connector, &tc_connector_helper_funcs); drm_connector_helper_add(&tc->connector, &tc_connector_helper_funcs);
ret = drm_connector_init(drm, &tc->connector, &tc_connector_funcs, ret = drm_connector_init(drm, &tc->connector, &tc_connector_funcs,
tc->panel ? DRM_MODE_CONNECTOR_eDP : tc->panel ? DRM_MODE_CONNECTOR_eDP :
...@@ -1256,6 +1297,15 @@ static int tc_bridge_attach(struct drm_bridge *bridge) ...@@ -1256,6 +1297,15 @@ static int tc_bridge_attach(struct drm_bridge *bridge)
if (ret) if (ret)
return ret; return ret;
/* Don't poll if don't have HPD connected */
if (tc->hpd_pin >= 0) {
if (tc->have_irq)
tc->connector.polled = DRM_CONNECTOR_POLL_HPD;
else
tc->connector.polled = DRM_CONNECTOR_POLL_CONNECT |
DRM_CONNECTOR_POLL_DISCONNECT;
}
if (tc->panel) if (tc->panel)
drm_panel_attach(tc->panel, &tc->connector); drm_panel_attach(tc->panel, &tc->connector);
...@@ -1322,6 +1372,49 @@ static const struct regmap_config tc_regmap_config = { ...@@ -1322,6 +1372,49 @@ static const struct regmap_config tc_regmap_config = {
.val_format_endian = REGMAP_ENDIAN_LITTLE, .val_format_endian = REGMAP_ENDIAN_LITTLE,
}; };
static irqreturn_t tc_irq_handler(int irq, void *arg)
{
struct tc_data *tc = arg;
u32 val;
int r;
r = regmap_read(tc->regmap, INTSTS_G, &val);
if (r)
return IRQ_NONE;
if (!val)
return IRQ_NONE;
if (val & INT_SYSERR) {
u32 stat = 0;
regmap_read(tc->regmap, SYSSTAT, &stat);
dev_err(tc->dev, "syserr %x\n", stat);
}
if (tc->hpd_pin >= 0 && tc->bridge.dev) {
/*
* H is triggered when the GPIO goes high.
*
* LC is triggered when the GPIO goes low and stays low for
* the duration of LCNT
*/
bool h = val & INT_GPIO_H(tc->hpd_pin);
bool lc = val & INT_GPIO_LC(tc->hpd_pin);
dev_dbg(tc->dev, "GPIO%d: %s %s\n", tc->hpd_pin,
h ? "H" : "", lc ? "LC" : "");
if (h || lc)
drm_kms_helper_hotplug_event(tc->bridge.dev);
}
regmap_write(tc->regmap, INTSTS_G, val);
return IRQ_HANDLED;
}
static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id) static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)
{ {
struct device *dev = &client->dev; struct device *dev = &client->dev;
...@@ -1373,6 +1466,33 @@ static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id) ...@@ -1373,6 +1466,33 @@ static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)
return ret; return ret;
} }
ret = of_property_read_u32(dev->of_node, "toshiba,hpd-pin",
&tc->hpd_pin);
if (ret) {
tc->hpd_pin = -ENODEV;
} else {
if (tc->hpd_pin < 0 || tc->hpd_pin > 1) {
dev_err(dev, "failed to parse HPD number\n");
return ret;
}
}
if (client->irq > 0) {
/* enable SysErr */
regmap_write(tc->regmap, INTCTL_G, INT_SYSERR);
ret = devm_request_threaded_irq(dev, client->irq,
NULL, tc_irq_handler,
IRQF_ONESHOT,
"tc358767-irq", tc);
if (ret) {
dev_err(dev, "failed to register dp interrupt\n");
return ret;
}
tc->have_irq = true;
}
ret = regmap_read(tc->regmap, TC_IDREG, &tc->rev); ret = regmap_read(tc->regmap, TC_IDREG, &tc->rev);
if (ret) { if (ret) {
dev_err(tc->dev, "can not read device ID: %d\n", ret); dev_err(tc->dev, "can not read device ID: %d\n", ret);
...@@ -1386,6 +1506,22 @@ static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id) ...@@ -1386,6 +1506,22 @@ static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)
tc->assr = (tc->rev == 0x6601); /* Enable ASSR for eDP panels */ tc->assr = (tc->rev == 0x6601); /* Enable ASSR for eDP panels */
if (tc->hpd_pin >= 0) {
u32 lcnt_reg = tc->hpd_pin == 0 ? INT_GP0_LCNT : INT_GP1_LCNT;
u32 h_lc = INT_GPIO_H(tc->hpd_pin) | INT_GPIO_LC(tc->hpd_pin);
/* Set LCNT to 2ms */
regmap_write(tc->regmap, lcnt_reg,
clk_get_rate(tc->refclk) * 2 / 1000);
/* We need the "alternate" mode for HPD */
regmap_write(tc->regmap, GPIOM, BIT(tc->hpd_pin));
if (tc->have_irq) {
/* enable H & LC */
regmap_update_bits(tc->regmap, INTCTL_G, h_lc, h_lc);
}
}
ret = tc_aux_link_setup(tc); ret = tc_aux_link_setup(tc);
if (ret) if (ret)
return ret; return ret;
...@@ -1398,12 +1534,6 @@ static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id) ...@@ -1398,12 +1534,6 @@ static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)
if (ret) if (ret)
return ret; return ret;
ret = tc_get_display_props(tc);
if (ret)
goto err_unregister_aux;
tc_connector_set_polling(tc, &tc->connector);
tc->bridge.funcs = &tc_bridge_funcs; tc->bridge.funcs = &tc_bridge_funcs;
tc->bridge.of_node = dev->of_node; tc->bridge.of_node = dev->of_node;
drm_bridge_add(&tc->bridge); drm_bridge_add(&tc->bridge);
...@@ -1411,9 +1541,6 @@ static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id) ...@@ -1411,9 +1541,6 @@ static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)
i2c_set_clientdata(client, tc); i2c_set_clientdata(client, tc);
return 0; return 0;
err_unregister_aux:
drm_dp_aux_unregister(&tc->aux);
return ret;
} }
static int tc_remove(struct i2c_client *client) static int tc_remove(struct i2c_client *client)
......
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