[PATCH v2 43/43] drm/sun4i: frontend: Add A20-specific device-tree compatible and quirks

[Paul Kocialkowski]

This adds the appropriate device-tree compatible and quirk data for
hooking frontend support for the A20. It supports the FIR coefficients
ready bit but not the access control bit. It also takes different phase
values than the A33 for these coefficients.

The compatible is already used in the A20 device-tree and already
documented in the device-tree bindings.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>
---
 drivers/gpu/drm/sun4i/sun4i_frontend.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sun4i_frontend.c b/drivers/gpu/drm/sun4i/sun4i_frontend.c
index 427c51029a9c..4a9cb478167f 100644
--- a/drivers/gpu/drm/sun4i/sun4i_frontend.c
+++ b/drivers/gpu/drm/sun4i/sun4i_frontend.c
@@ -676,6 +676,20 @@ static const struct dev_pm_ops sun4i_frontend_pm_ops = {
 	.runtime_suspend	= sun4i_frontend_runtime_suspend,
 };
 
+static const struct sun4i_frontend_data sun7i_a20_frontend = {
+	.ch_phase		= {
+		{
+			.horzphase = 0,
+			.vertphase = { 0, 0 },
+		},
+		{
+			.horzphase = 0xfc000,
+			.vertphase = { 0xfc000, 0xfc000 },
+		},
+	},
+	.has_coef_rdy		= true,
+};
+
 static const struct sun4i_frontend_data sun8i_a33_frontend = {
 	.ch_phase		= {
 		{
@@ -691,6 +705,10 @@ static const struct sun4i_frontend_data sun8i_a33_frontend = {
 };
 
 const struct of_device_id sun4i_frontend_of_table[] = {
+	{
+		.compatible = "allwinner,sun7i-a20-display-frontend",
+		.data = &sun7i_a20_frontend
+	},
 	{
 		.compatible = "allwinner,sun8i-a33-display-frontend",
 		.data = &sun8i_a33_frontend
-- 
2.19.1