The driver currently hard-codes DSI lane count to two, however the chip
is capable of operating in 1..4 DSI lanes mode. Parse 'data-lanes' DT
property and program the result into DSI_CTRL register.
Signed-off-by: Marek Vasut <marex@xxxxxxx>
Cc: Jagan Teki <jagan@xxxxxxxxxxxxxxxxxxxx>
Cc: Maxime Ripard <maxime@xxxxxxxxxx>
Cc: Robert Foss <robert.foss@xxxxxxxxxx>
Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
Cc: Thomas Zimmermann <tzimmermann@xxxxxxx>
To: dri-devel@xxxxxxxxxxxxxxxxxxxxx
---
V2: Rebase on next-20220214
---
drivers/gpu/drm/bridge/chipone-icn6211.c | 21 ++++++++++++++++++++-
1 file changed, 20 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/bridge/chipone-icn6211.c b/drivers/gpu/drm/bridge/chipone-icn6211.c
index 2ac8eb7e25f52..7c013a08c7b00 100644
--- a/drivers/gpu/drm/bridge/chipone-icn6211.c
+++ b/drivers/gpu/drm/bridge/chipone-icn6211.c
@@ -136,10 +136,12 @@ struct chipone {
struct drm_bridge bridge;
struct drm_display_mode mode;
struct drm_bridge *panel_bridge;
+ struct device_node *host_node;
struct gpio_desc *enable_gpio;
struct regulator *vdd1;
struct regulator *vdd2;
struct regulator *vdd3;
+ int dsi_lanes;
};
static inline struct chipone *bridge_to_chipone(struct drm_bridge *bridge)
@@ -212,6 +214,11 @@ static void chipone_atomic_enable(struct drm_bridge *bridge,
/* dsi specific sequence */
ICN6211_DSI(icn, SYNC_EVENT_DLY, 0x80);
ICN6211_DSI(icn, HFP_MIN, hfp & 0xff);
+
+ /* DSI data lane count */
+ ICN6211_DSI(icn, DSI_CTRL,
+ DSI_CTRL_UNKNOWN | DSI_CTRL_DSI_LANES(icn->dsi_lanes - 1));
+
ICN6211_DSI(icn, MIPI_PD_CK_LANE, 0xa0);
ICN6211_DSI(icn, PLL_CTRL(12), 0xff);
@@ -314,6 +321,7 @@ static const struct drm_bridge_funcs chipone_bridge_funcs = {
static int chipone_parse_dt(struct chipone *icn)
{
struct device *dev = icn->dev;
+ struct device_node *endpoint;
struct drm_panel *panel;
int ret;
@@ -350,6 +358,16 @@ static int chipone_parse_dt(struct chipone *icn)
return PTR_ERR(icn->enable_gpio);
}
+ endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, 0);
+ icn->dsi_lanes = of_property_count_u32_elems(endpoint, "data-lanes");
