Add a separate mipi_dsi_driver for adv7533. In the case of this chip,
both the i2c and dsi drivers will operate together.
Both the drivers are expected to use the same per-device driver
data struct. The i2c driver takes the responsibility of allocating
the struct, and the dsi device gets a pointer to it by getting the
corresponding i2c client device's data.
Signed-off-by: Archit Taneja <architt@xxxxxxxxxxxxxx>
---
drivers/gpu/drm/i2c/adv7511.c | 98 ++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 97 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i2c/adv7511.c b/drivers/gpu/drm/i2c/adv7511.c
index b6c80e3..8325913 100644
--- a/drivers/gpu/drm/i2c/adv7511.c
+++ b/drivers/gpu/drm/i2c/adv7511.c
@@ -19,6 +19,7 @@
#include <drm/drm_encoder_slave.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
+#include <drm/drm_mipi_dsi.h>
#include "adv7511.h"
@@ -58,6 +59,9 @@ struct adv7511 {
struct gpio_desc *gpio_pd;
+ struct mipi_dsi_device *dsi;
+ int num_dsi_lanes;
+
enum adv7511_type type;
};
@@ -403,8 +407,10 @@ static void adv7511_dsi_receiver_dpms(struct adv7511 *adv7511)
return;
if (adv7511->powered) {
+ struct mipi_dsi_device *dsi = adv7511->dsi;
+
/* set number of dsi lanes (hardcoded to 4 for now) */
- regmap_write(adv7511->regmap_cec, 0x1c, 0x4 << 4);
+ regmap_write(adv7511->regmap_cec, 0x1c, dsi->lanes << 4);
/* disable internal timing generator */
regmap_write(adv7511->regmap_cec, 0x27, 0x0b);
/* enable hdmi */
@@ -1289,8 +1295,97 @@ static struct drm_i2c_encoder_driver adv7511_driver = {
.encoder_init = adv7511_encoder_init,
};
+/* Driver for the DSI component within the chip */
+static int adv7533_parse_dt(struct device_node *np, struct adv7511 *adv7511)
+{
+ u32 num_lanes;
+
+ of_property_read_u32(np, "adi,dsi-lanes", &num_lanes);
+
+ if (num_lanes < 1 || num_lanes > 4)
+ return -EINVAL;
+
+ adv7511->num_dsi_lanes = num_lanes;
+
+ /* TODO: Check if these need to be parsed by DT or not */
+ adv7511->rgb = true;
+ adv7511->embedded_sync = false;
+
+ return 0;
+}
+
+static int adv7533_probe(struct mipi_dsi_device *dsi)
+{
+ struct device *dev = &dsi->dev;
+ struct adv7511 *adv7511;
+ struct device_node *np = dsi->dev.of_node;
+ struct device_node *i2c_node;
+ struct i2c_client *i2c;
+ int ret;
+
+ i2c_node = of_parse_phandle(np, "i2c-control", 0);
+ if (!i2c_node)
+ return -ENODEV;
+
+ i2c = of_find_i2c_device_by_node(i2c_node);
+ if (!i2c)
+ return -EPROBE_DEFER;
+
+ adv7511 = i2c_get_clientdata(i2c);
+ if (!adv7511)
+ return -ENODEV;
+
+ /* this sets up link with the i2c driver */
+ adv7511->dsi = dsi;
+
+ mipi_dsi_set_drvdata(dsi, adv7511);
+
+ ret = adv7533_parse_dt(np, adv7511);
+ if (ret)
+ return ret;
+
+ dsi->lanes = adv7511->num_dsi_lanes;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE
+ | MIPI_DSI_MODE_EOT_PACKET | MIPI_DSI_MODE_VIDEO_HSE;
+
+ return mipi_dsi_attach(dsi);
+}
+
+static int adv7533_remove(struct mipi_dsi_device *dsi)
+{
+ mipi_dsi_detach(dsi);
+
+ return 0;
+}
+
+static const struct of_device_id adv7533_of_match[] = {
+ { .compatible = "adi,adv7533-dsi" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, adv7533_of_match);
+
+static struct mipi_dsi_driver adv7533_driver = {
+ .probe = adv7533_probe,
+ .remove = adv7533_remove,
+ .driver = {
+ .name = "adv7533",
+ .of_match_table = adv7533_of_match,
+ },
+};
+
static int __init adv7511_init(void)
{
+ int ret;
+
+ /*
+ * not bailing out here because adv7511 variant won't
+ * need a DSI driver
+ */
+ ret = mipi_dsi_driver_register(&adv7533_driver);
+ if (ret)
+ DRM_DEBUG("mipi driver register failed %d\n", ret);
+
return drm_i2c_encoder_register(THIS_MODULE, &adv7511_driver);
}
module_init(adv7511_init);
@@ -1298,6 +1393,7 @@ module_init(adv7511_init);
static void __exit adv7511_exit(void)
{
drm_i2c_encoder_unregister(&adv7511_driver);
+ mipi_dsi_driver_unregister(&adv7533_driver);
}
module_exit(adv7511_exit);
--
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