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path: root/drivers/gpu/drm/bridge/ptn3460.c
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Diffstat (limited to 'drivers/gpu/drm/bridge/ptn3460.c')
-rw-r--r--drivers/gpu/drm/bridge/ptn3460.c310
1 files changed, 192 insertions, 118 deletions
diff --git a/drivers/gpu/drm/bridge/ptn3460.c b/drivers/gpu/drm/bridge/ptn3460.c
index d466696..826833e 100644
--- a/drivers/gpu/drm/bridge/ptn3460.c
+++ b/drivers/gpu/drm/bridge/ptn3460.c
@@ -13,20 +13,23 @@
* GNU General Public License for more details.
*/
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
-#include <linux/i2c.h>
-#include <linux/gpio.h>
-#include <linux/delay.h>
+#include <linux/of_graph.h>
-#include "drmP.h"
-#include "drm_edid.h"
-#include "drm_crtc.h"
-#include "drm_crtc_helper.h"
+#include <drm/drm_panel.h>
#include "bridge/ptn3460.h"
+#include "drm_crtc.h"
+#include "drm_crtc_helper.h"
+#include "drm_edid.h"
+#include "drmP.h"
+
#define PTN3460_EDID_ADDR 0x0
#define PTN3460_EDID_EMULATION_ADDR 0x84
#define PTN3460_EDID_ENABLE_EMULATION 0
@@ -36,15 +39,27 @@
struct ptn3460_bridge {
struct drm_connector connector;
struct i2c_client *client;
- struct drm_encoder *encoder;
- struct drm_bridge *bridge;
+ struct drm_bridge bridge;
struct edid *edid;
- int gpio_pd_n;
- int gpio_rst_n;
+ struct drm_panel *panel;
+ struct gpio_desc *gpio_pd_n;
+ struct gpio_desc *gpio_rst_n;
u32 edid_emulation;
bool enabled;
};
+static inline struct ptn3460_bridge *
+ bridge_to_ptn3460(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct ptn3460_bridge, bridge);
+}
+
+static inline struct ptn3460_bridge *
+ connector_to_ptn3460(struct drm_connector *connector)
+{
+ return container_of(connector, struct ptn3460_bridge, connector);
+}
+
static int ptn3460_read_bytes(struct ptn3460_bridge *ptn_bridge, char addr,
u8 *buf, int len)
{
@@ -92,7 +107,7 @@ static int ptn3460_select_edid(struct ptn3460_bridge *ptn_bridge)
ret = ptn3460_write_byte(ptn_bridge, PTN3460_EDID_SRAM_LOAD_ADDR,
ptn_bridge->edid_emulation);
if (ret) {
- DRM_ERROR("Failed to transfer edid to sram, ret=%d\n", ret);
+ DRM_ERROR("Failed to transfer EDID to sram, ret=%d\n", ret);
return ret;
}
@@ -102,7 +117,7 @@ static int ptn3460_select_edid(struct ptn3460_bridge *ptn_bridge)
ret = ptn3460_write_byte(ptn_bridge, PTN3460_EDID_EMULATION_ADDR, val);
if (ret) {
- DRM_ERROR("Failed to write edid value, ret=%d\n", ret);
+ DRM_ERROR("Failed to write EDID value, ret=%d\n", ret);
return ret;
}
@@ -111,19 +126,21 @@ static int ptn3460_select_edid(struct ptn3460_bridge *ptn_bridge)
static void ptn3460_pre_enable(struct drm_bridge *bridge)
{
- struct ptn3460_bridge *ptn_bridge = bridge->driver_private;
+ struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
int ret;
if (ptn_bridge->enabled)
return;
- if (gpio_is_valid(ptn_bridge->gpio_pd_n))
- gpio_set_value(ptn_bridge->gpio_pd_n, 1);
+ gpiod_set_value(ptn_bridge->gpio_pd_n, 1);
+
+ gpiod_set_value(ptn_bridge->gpio_rst_n, 0);
+ usleep_range(10, 20);
+ gpiod_set_value(ptn_bridge->gpio_rst_n, 1);
- if (gpio_is_valid(ptn_bridge->gpio_rst_n)) {
- gpio_set_value(ptn_bridge->gpio_rst_n, 0);
- udelay(10);
- gpio_set_value(ptn_bridge->gpio_rst_n, 1);
+ if (drm_panel_prepare(ptn_bridge->panel)) {
+ DRM_ERROR("failed to prepare panel\n");
+ return;
}
/*
@@ -135,73 +152,67 @@ static void ptn3460_pre_enable(struct drm_bridge *bridge)
ret = ptn3460_select_edid(ptn_bridge);
if (ret)
- DRM_ERROR("Select edid failed ret=%d\n", ret);
+ DRM_ERROR("Select EDID failed ret=%d\n", ret);
ptn_bridge->enabled = true;
}
static void ptn3460_enable(struct drm_bridge *bridge)
{
+ struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
+
+ if (drm_panel_enable(ptn_bridge->panel)) {
+ DRM_ERROR("failed to enable panel\n");
+ return;
+ }
}
static void ptn3460_disable(struct drm_bridge *bridge)
{
- struct ptn3460_bridge *ptn_bridge = bridge->driver_private;
+ struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
if (!ptn_bridge->enabled)
return;
ptn_bridge->enabled = false;
- if (gpio_is_valid(ptn_bridge->gpio_rst_n))
- gpio_set_value(ptn_bridge->gpio_rst_n, 1);
+ if (drm_panel_disable(ptn_bridge->panel)) {
+ DRM_ERROR("failed to disable panel\n");
+ return;
+ }
- if (gpio_is_valid(ptn_bridge->gpio_pd_n))
- gpio_set_value(ptn_bridge->gpio_pd_n, 0);
+ gpiod_set_value(ptn_bridge->gpio_rst_n, 1);
+ gpiod_set_value(ptn_bridge->gpio_pd_n, 0);
}
static void ptn3460_post_disable(struct drm_bridge *bridge)
{
-}
+ struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
-void ptn3460_bridge_destroy(struct drm_bridge *bridge)
-{
- struct ptn3460_bridge *ptn_bridge = bridge->driver_private;
-
- drm_bridge_cleanup(bridge);
- if (gpio_is_valid(ptn_bridge->gpio_pd_n))
- gpio_free(ptn_bridge->gpio_pd_n);
- if (gpio_is_valid(ptn_bridge->gpio_rst_n))
- gpio_free(ptn_bridge->gpio_rst_n);
- /* Nothing else to free, we've got devm allocated memory */
+ if (drm_panel_unprepare(ptn_bridge->panel)) {
+ DRM_ERROR("failed to unprepare panel\n");
+ return;
+ }
}
-struct drm_bridge_funcs ptn3460_bridge_funcs = {
- .pre_enable = ptn3460_pre_enable,
- .enable = ptn3460_enable,
- .disable = ptn3460_disable,
- .post_disable = ptn3460_post_disable,
- .destroy = ptn3460_bridge_destroy,
-};
-
-int ptn3460_get_modes(struct drm_connector *connector)
+static int ptn3460_get_modes(struct drm_connector *connector)
{
struct ptn3460_bridge *ptn_bridge;
u8 *edid;
- int ret, num_modes;
+ int ret, num_modes = 0;
bool power_off;
- ptn_bridge = container_of(connector, struct ptn3460_bridge, connector);
+ ptn_bridge = connector_to_ptn3460(connector);
if (ptn_bridge->edid)
return drm_add_edid_modes(connector, ptn_bridge->edid);
power_off = !ptn_bridge->enabled;
- ptn3460_pre_enable(ptn_bridge->bridge);
+ ptn3460_pre_enable(&ptn_bridge->bridge);
edid = kmalloc(EDID_LENGTH, GFP_KERNEL);
if (!edid) {
- DRM_ERROR("Failed to allocate edid\n");
+ DRM_ERROR("Failed to allocate EDID\n");
return 0;
}
@@ -209,7 +220,6 @@ int ptn3460_get_modes(struct drm_connector *connector)
EDID_LENGTH);
if (ret) {
kfree(edid);
- num_modes = 0;
goto out;
}
@@ -220,124 +230,188 @@ int ptn3460_get_modes(struct drm_connector *connector)
out:
if (power_off)
- ptn3460_disable(ptn_bridge->bridge);
+ ptn3460_disable(&ptn_bridge->bridge);
return num_modes;
}
-struct drm_encoder *ptn3460_best_encoder(struct drm_connector *connector)
+static struct drm_encoder *ptn3460_best_encoder(struct drm_connector *connector)
{
- struct ptn3460_bridge *ptn_bridge;
-
- ptn_bridge = container_of(connector, struct ptn3460_bridge, connector);
+ struct ptn3460_bridge *ptn_bridge = connector_to_ptn3460(connector);
- return ptn_bridge->encoder;
+ return ptn_bridge->bridge.encoder;
}
-struct drm_connector_helper_funcs ptn3460_connector_helper_funcs = {
+static struct drm_connector_helper_funcs ptn3460_connector_helper_funcs = {
.get_modes = ptn3460_get_modes,
.best_encoder = ptn3460_best_encoder,
};
-enum drm_connector_status ptn3460_detect(struct drm_connector *connector,
+static enum drm_connector_status ptn3460_detect(struct drm_connector *connector,
bool force)
{
return connector_status_connected;
}
-void ptn3460_connector_destroy(struct drm_connector *connector)
+static void ptn3460_connector_destroy(struct drm_connector *connector)
{
drm_connector_cleanup(connector);
}
-struct drm_connector_funcs ptn3460_connector_funcs = {
+static struct drm_connector_funcs ptn3460_connector_funcs = {
.dpms = drm_helper_connector_dpms,
.fill_modes = drm_helper_probe_single_connector_modes,
.detect = ptn3460_detect,
.destroy = ptn3460_connector_destroy,
};
-int ptn3460_init(struct drm_device *dev, struct drm_encoder *encoder,
- struct i2c_client *client, struct device_node *node)
+int ptn3460_bridge_attach(struct drm_bridge *bridge)
{
+ struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
int ret;
- struct drm_bridge *bridge;
- struct ptn3460_bridge *ptn_bridge;
- bridge = devm_kzalloc(dev->dev, sizeof(*bridge), GFP_KERNEL);
- if (!bridge) {
- DRM_ERROR("Failed to allocate drm bridge\n");
- return -ENOMEM;
+ if (!bridge->encoder) {
+ DRM_ERROR("Parent encoder object not found");
+ return -ENODEV;
+ }
+
+ ptn_bridge->connector.polled = DRM_CONNECTOR_POLL_HPD;
+ ret = drm_connector_init(bridge->dev, &ptn_bridge->connector,
+ &ptn3460_connector_funcs, DRM_MODE_CONNECTOR_LVDS);
+ if (ret) {
+ DRM_ERROR("Failed to initialize connector with drm\n");
+ return ret;
}
+ drm_connector_helper_add(&ptn_bridge->connector,
+ &ptn3460_connector_helper_funcs);
+ drm_connector_register(&ptn_bridge->connector);
+ drm_mode_connector_attach_encoder(&ptn_bridge->connector,
+ bridge->encoder);
- ptn_bridge = devm_kzalloc(dev->dev, sizeof(*ptn_bridge), GFP_KERNEL);
+ if (ptn_bridge->panel)
+ drm_panel_attach(ptn_bridge->panel, &ptn_bridge->connector);
+
+ drm_helper_hpd_irq_event(ptn_bridge->connector.dev);
+
+ return ret;
+}
+
+static struct drm_bridge_funcs ptn3460_bridge_funcs = {
+ .pre_enable = ptn3460_pre_enable,
+ .enable = ptn3460_enable,
+ .disable = ptn3460_disable,
+ .post_disable = ptn3460_post_disable,
+ .attach = ptn3460_bridge_attach,
+};
+
+static int ptn3460_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct ptn3460_bridge *ptn_bridge;
+ struct device_node *endpoint, *panel_node;
+ int ret;
+
+ ptn_bridge = devm_kzalloc(dev, sizeof(*ptn_bridge), GFP_KERNEL);
if (!ptn_bridge) {
- DRM_ERROR("Failed to allocate ptn bridge\n");
return -ENOMEM;
}
- ptn_bridge->client = client;
- ptn_bridge->encoder = encoder;
- ptn_bridge->bridge = bridge;
- ptn_bridge->gpio_pd_n = of_get_named_gpio(node, "powerdown-gpio", 0);
- if (gpio_is_valid(ptn_bridge->gpio_pd_n)) {
- ret = gpio_request_one(ptn_bridge->gpio_pd_n,
- GPIOF_OUT_INIT_HIGH, "PTN3460_PD_N");
- if (ret) {
- DRM_ERROR("Request powerdown-gpio failed (%d)\n", ret);
- return ret;
+ endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
+ if (endpoint) {
+ panel_node = of_graph_get_remote_port_parent(endpoint);
+ if (panel_node) {
+ ptn_bridge->panel = of_drm_find_panel(panel_node);
+ of_node_put(panel_node);
+ if (!ptn_bridge->panel)
+ return -EPROBE_DEFER;
}
}
- ptn_bridge->gpio_rst_n = of_get_named_gpio(node, "reset-gpio", 0);
- if (gpio_is_valid(ptn_bridge->gpio_rst_n)) {
- /*
- * Request the reset pin low to avoid the bridge being
- * initialized prematurely
- */
- ret = gpio_request_one(ptn_bridge->gpio_rst_n,
- GPIOF_OUT_INIT_LOW, "PTN3460_RST_N");
- if (ret) {
- DRM_ERROR("Request reset-gpio failed (%d)\n", ret);
- gpio_free(ptn_bridge->gpio_pd_n);
- return ret;
- }
+ ptn_bridge->client = client;
+
+ ptn_bridge->gpio_pd_n = devm_gpiod_get(&client->dev, "powerdown");
+ if (IS_ERR(ptn_bridge->gpio_pd_n)) {
+ ret = PTR_ERR(ptn_bridge->gpio_pd_n);
+ dev_err(dev, "cannot get gpio_pd_n %d\n", ret);
+ return ret;
}
- ret = of_property_read_u32(node, "edid-emulation",
- &ptn_bridge->edid_emulation);
+ ret = gpiod_direction_output(ptn_bridge->gpio_pd_n, 1);
if (ret) {
- DRM_ERROR("Can't read edid emulation value\n");
- goto err;
+ DRM_ERROR("cannot configure gpio_pd_n\n");
+ return ret;
}
- ret = drm_bridge_init(dev, bridge, &ptn3460_bridge_funcs);
+ ptn_bridge->gpio_rst_n = devm_gpiod_get(&client->dev, "reset");
+ if (IS_ERR(ptn_bridge->gpio_rst_n)) {
+ ret = PTR_ERR(ptn_bridge->gpio_rst_n);
+ DRM_ERROR("cannot get gpio_rst_n %d\n", ret);
+ return ret;
+ }
+ /*
+ * Request the reset pin low to avoid the bridge being
+ * initialized prematurely
+ */
+ ret = gpiod_direction_output(ptn_bridge->gpio_rst_n, 0);
if (ret) {
- DRM_ERROR("Failed to initialize bridge with drm\n");
- goto err;
+ DRM_ERROR("cannot configure gpio_rst_n\n");
+ return ret;
}
- bridge->driver_private = ptn_bridge;
- encoder->bridge = bridge;
+ ret = of_property_read_u32(dev->of_node, "edid-emulation",
+ &ptn_bridge->edid_emulation);
+ if (ret) {
+ dev_err(dev, "Can't read EDID emulation value\n");
+ return ret;
+ }
- ret = drm_connector_init(dev, &ptn_bridge->connector,
- &ptn3460_connector_funcs, DRM_MODE_CONNECTOR_LVDS);
+ ptn_bridge->bridge.funcs = &ptn3460_bridge_funcs;
+ ptn_bridge->bridge.of_node = dev->of_node;
+ ret = drm_bridge_add(&ptn_bridge->bridge);
if (ret) {
- DRM_ERROR("Failed to initialize connector with drm\n");
- goto err;
+ DRM_ERROR("Failed to add bridge\n");
+ return ret;
}
- drm_connector_helper_add(&ptn_bridge->connector,
- &ptn3460_connector_helper_funcs);
- drm_connector_register(&ptn_bridge->connector);
- drm_mode_connector_attach_encoder(&ptn_bridge->connector, encoder);
+
+ i2c_set_clientdata(client, ptn_bridge);
return 0;
+}
-err:
- if (gpio_is_valid(ptn_bridge->gpio_pd_n))
- gpio_free(ptn_bridge->gpio_pd_n);
- if (gpio_is_valid(ptn_bridge->gpio_rst_n))
- gpio_free(ptn_bridge->gpio_rst_n);
- return ret;
+static int ptn3460_remove(struct i2c_client *client)
+{
+ struct ptn3460_bridge *ptn_bridge = i2c_get_clientdata(client);
+
+ drm_bridge_remove(&ptn_bridge->bridge);
+
+ return 0;
}
-EXPORT_SYMBOL(ptn3460_init);
+
+static const struct i2c_device_id ptn3460_i2c_table[] = {
+ {"nxp,ptn3460", 0},
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, ptn3460_i2c_table);
+
+static const struct of_device_id ptn3460_match[] = {
+ { .compatible = "nxp,ptn3460" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ptn3460_match);
+
+static struct i2c_driver ptn3460_driver = {
+ .id_table = ptn3460_i2c_table,
+ .probe = ptn3460_probe,
+ .remove = ptn3460_remove,
+ .driver = {
+ .name = "nxp,ptn3460",
+ .owner = THIS_MODULE,
+ .of_match_table = ptn3460_match,
+ },
+};
+module_i2c_driver(ptn3460_driver);
+
+MODULE_AUTHOR("Sean Paul <seanpaul@chromium.org>");
+MODULE_DESCRIPTION("NXP ptn3460 eDP-LVDS converter driver");
+MODULE_LICENSE("GPL v2");