media: hantro: Add support for Allwinner H6

Allwinner H6 has a Hantro G2 core used for VP9 decoding. It's not clear
at this time if HEVC is also supported or not.
Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Acked-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Reviewed-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/hantro/Kconfig

 # SPDX-License-Identifier: GPL-2.0
 config VIDEO_HANTRO
 	tristate "Hantro VPU driver"
-	depends on ARCH_MXC || ARCH_ROCKCHIP || ARCH_AT91 || COMPILE_TEST
+	depends on ARCH_MXC || ARCH_ROCKCHIP || ARCH_AT91 || ARCH_SUNXI || COMPILE_TEST
 	depends on VIDEO_DEV && VIDEO_V4L2
 	select MEDIA_CONTROLLER
 	select MEDIA_CONTROLLER_REQUEST_API
@@ -40,3 +40,11 @@ config VIDEO_HANTRO_ROCKCHIP
 	default y
 	help
 	  Enable support for RK3288, RK3328, and RK3399 SoCs.
+
+config VIDEO_HANTRO_SUNXI
+	bool "Hantro VPU Allwinner support"
+	depends on VIDEO_HANTRO
+	depends on ARCH_SUNXI || COMPILE_TEST
+	default y
+	help
+	  Enable support for H6 SoC.

drivers/staging/media/hantro/Makefile

@@ -33,3 +33,6 @@ hantro-vpu-$(CONFIG_VIDEO_HANTRO_SAMA5D4) += \
 
 hantro-vpu-$(CONFIG_VIDEO_HANTRO_ROCKCHIP) += \
 		rockchip_vpu_hw.o
+
+hantro-vpu-$(CONFIG_VIDEO_HANTRO_SUNXI) += \
+		sunxi_vpu_hw.o

drivers/staging/media/hantro/hantro_drv.c

@@ -620,6 +620,9 @@ static const struct of_device_id of_hantro_match[] = {
 #endif
 #ifdef CONFIG_VIDEO_HANTRO_SAMA5D4
 	{ .compatible = "microchip,sama5d4-vdec", .data = &sama5d4_vdec_variant, },
+#endif
+#ifdef CONFIG_VIDEO_HANTRO_SUNXI
+	{ .compatible = "allwinner,sun50i-h6-vpu-g2", .data = &sunxi_vpu_variant, },
 #endif
 	{ /* sentinel */ }
 };

drivers/staging/media/hantro/hantro_hw.h

@@ -308,6 +308,7 @@ extern const struct hantro_variant rk3288_vpu_variant;
 extern const struct hantro_variant rk3328_vpu_variant;
 extern const struct hantro_variant rk3399_vpu_variant;
 extern const struct hantro_variant sama5d4_vdec_variant;
+extern const struct hantro_variant sunxi_vpu_variant;
 
 extern const struct hantro_postproc_ops hantro_g1_postproc_ops;
 extern const struct hantro_postproc_ops hantro_g2_postproc_ops;

drivers/staging/media/hantro/sunxi_vpu_hw.c

+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Allwinner Hantro G2 VPU codec driver
+ *
+ * Copyright (C) 2021 Jernej Skrabec <jernej.skrabec@gmail.com>
+ */
+
+#include <linux/clk.h>
+
+#include "hantro.h"
+
+static const struct hantro_fmt sunxi_vpu_postproc_fmts[] = {
+	{
+		.fourcc = V4L2_PIX_FMT_NV12,
+		.codec_mode = HANTRO_MODE_NONE,
+		.postprocessed = true,
+	},
+};
+
+static const struct hantro_fmt sunxi_vpu_dec_fmts[] = {
+	{
+		.fourcc = V4L2_PIX_FMT_NV12_4L4,
+		.codec_mode = HANTRO_MODE_NONE,
+	},
+	{
+		.fourcc = V4L2_PIX_FMT_VP9_FRAME,
+		.codec_mode = HANTRO_MODE_VP9_DEC,
+		.max_depth = 2,
+		.frmsize = {
+			.min_width = 48,
+			.max_width = 3840,
+			.step_width = MB_DIM,
+			.min_height = 48,
+			.max_height = 2160,
+			.step_height = MB_DIM,
+		},
+	},
+};
+
+static int sunxi_vpu_hw_init(struct hantro_dev *vpu)
+{
+	clk_set_rate(vpu->clocks[0].clk, 300000000);
+
+	return 0;
+}
+
+static void sunxi_vpu_reset(struct hantro_ctx *ctx)
+{
+	struct hantro_dev *vpu = ctx->dev;
+
+	reset_control_reset(vpu->resets);
+}
+
+static const struct hantro_codec_ops sunxi_vpu_codec_ops[] = {
+	[HANTRO_MODE_VP9_DEC] = {
+		.run = hantro_g2_vp9_dec_run,
+		.done = hantro_g2_vp9_dec_done,
+		.reset = sunxi_vpu_reset,
+		.init = hantro_vp9_dec_init,
+		.exit = hantro_vp9_dec_exit,
+	},
+};
+
+static const struct hantro_irq sunxi_irqs[] = {
+	{ NULL, hantro_g2_irq },
+};
+
+static const char * const sunxi_clk_names[] = { "mod", "bus" };
+
+const struct hantro_variant sunxi_vpu_variant = {
+	.dec_fmts = sunxi_vpu_dec_fmts,
+	.num_dec_fmts = ARRAY_SIZE(sunxi_vpu_dec_fmts),
+	.postproc_fmts = sunxi_vpu_postproc_fmts,
+	.num_postproc_fmts = ARRAY_SIZE(sunxi_vpu_postproc_fmts),
+	.postproc_ops = &hantro_g2_postproc_ops,
+	.codec = HANTRO_VP9_DECODER,
+	.codec_ops = sunxi_vpu_codec_ops,
+	.init = sunxi_vpu_hw_init,
+	.irqs = sunxi_irqs,
+	.num_irqs = ARRAY_SIZE(sunxi_irqs),
+	.clk_names = sunxi_clk_names,
+	.num_clocks = ARRAY_SIZE(sunxi_clk_names),
+	.double_buffer = 1,
+	.legacy_regs = 1,
+	.late_postproc = 1,
+};