[PATCH v4 25/26] drm: sun4i: de33: fmt: add Display Engine 3.3 (DE33) support

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec at gmail.com>

Like the DE3, the DE33 has a FMT (formatter) module, which
provides YUV444 to YUV422/YUV420 conversion, format re-mapping and color
depth conversion, although the DE33 module appears significantly more
capable, including up to 4K video support.

Add support for the DE33.

Signed-off-by: Jernej Skrabec <jernej.skrabec at gmail.com>
Signed-off-by: Ryan Walklin <ryan at testtoast.com>
---
 drivers/gpu/drm/sun4i/sun50i_fmt.c | 21 +++++++++++++++++++--
 drivers/gpu/drm/sun4i/sun50i_fmt.h |  1 +
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun50i_fmt.c b/drivers/gpu/drm/sun4i/sun50i_fmt.c
index 050a8716ae862..39682d4e6d208 100644
--- a/drivers/gpu/drm/sun4i/sun50i_fmt.c
+++ b/drivers/gpu/drm/sun4i/sun50i_fmt.c
@@ -51,6 +51,19 @@ static void sun50i_fmt_de3_limits(u32 *limits, u32 colorspace, bool bit10)
 	}
 }
 
+static void sun50i_fmt_de33_limits(u32 *limits, u32 colorspace)
+{
+	if (colorspace == SUN50I_FMT_CS_YUV444RGB) {
+		limits[0] = SUN50I_FMT_LIMIT(0, 4095);
+		limits[1] = SUN50I_FMT_LIMIT(0, 4095);
+		limits[2] = SUN50I_FMT_LIMIT(0, 4095);
+	} else {
+		limits[0] = SUN50I_FMT_LIMIT(256, 3840);
+		limits[1] = SUN50I_FMT_LIMIT(256, 3840);
+		limits[2] = SUN50I_FMT_LIMIT(256, 3840);
+	}
+}
+
 void sun50i_fmt_setup(struct sun8i_mixer *mixer, u16 width,
 		      u16 height, u32 format)
 {
@@ -60,10 +73,14 @@ void sun50i_fmt_setup(struct sun8i_mixer *mixer, u16 width,
 
 	colorspace = sun50i_fmt_get_colorspace(format);
 	bit10 = sun50i_fmt_is_10bit(format);
-	base = SUN50I_FMT_DE3;
+	base = mixer->cfg->de_type == sun8i_mixer_de3 ?
+		SUN50I_FMT_DE3 : SUN50I_FMT_DE33;
 	regs = sun8i_blender_regmap(mixer);
 
-	sun50i_fmt_de3_limits(limit, colorspace, bit10);
+	if (mixer->cfg->de_type == sun8i_mixer_de3)
+		sun50i_fmt_de3_limits(limit, colorspace, bit10);
+	else
+		sun50i_fmt_de33_limits(limit, colorspace);
 
 	regmap_write(regs, SUN50I_FMT_CTRL(base), 0);
 
diff --git a/drivers/gpu/drm/sun4i/sun50i_fmt.h b/drivers/gpu/drm/sun4i/sun50i_fmt.h
index 4127f7206aade..3e60d5c788b39 100644
--- a/drivers/gpu/drm/sun4i/sun50i_fmt.h
+++ b/drivers/gpu/drm/sun4i/sun50i_fmt.h
@@ -9,6 +9,7 @@
 #include "sun8i_mixer.h"
 
 #define SUN50I_FMT_DE3 0xa8000
+#define SUN50I_FMT_DE33 0x5000
 
 #define SUN50I_FMT_CTRL(base)   ((base) + 0x00)
 #define SUN50I_FMT_SIZE(base)   ((base) + 0x04)
-- 
2.46.1