media: hantro: Prepare for other G2 codecs

VeriSilicon Hantro G2 core supports other codecs besides hevc.
Factor out some common code in preparation for vp9 support.
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Reviewed-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/hantro/Makefile

@@ -12,6 +12,7 @@ hantro-vpu-y += \
 		hantro_g1_mpeg2_dec.o \
 		hantro_g2_hevc_dec.o \
 		hantro_g1_vp8_dec.o \
+		hantro_g2.o \
 		rockchip_vpu2_hw_jpeg_enc.o \
 		rockchip_vpu2_hw_h264_dec.o \
 		rockchip_vpu2_hw_mpeg2_dec.o \

drivers/staging/media/hantro/hantro.h

@@ -369,6 +369,13 @@ static inline void vdpu_write(struct hantro_dev *vpu, u32 val, u32 reg)
 	writel(val, vpu->dec_base + reg);
 }
 
+static inline void hantro_write_addr(struct hantro_dev *vpu,
+				     unsigned long offset,
+				     dma_addr_t addr)
+{
+	vdpu_write(vpu, addr & 0xffffffff, offset);
+}
+
 static inline u32 vdpu_read(struct hantro_dev *vpu, u32 reg)
 {
 	u32 val = readl(vpu->dec_base + reg);

drivers/staging/media/hantro/hantro_drv.c

@@ -907,6 +907,11 @@ static int hantro_probe(struct platform_device *pdev)
 	vpu->enc_base = vpu->reg_bases[0] + vpu->variant->enc_offset;
 	vpu->dec_base = vpu->reg_bases[0] + vpu->variant->dec_offset;
 
+	/**
+	 * TODO: Eventually allow taking advantage of full 64-bit address space.
+	 * Until then we assume the MSB portion of buffers' base addresses is
+	 * always 0 due to this masking operation.
+	 */
 	ret = dma_set_coherent_mask(vpu->dev, DMA_BIT_MASK(32));
 	if (ret) {
 		dev_err(vpu->dev, "Could not set DMA coherent mask.\n");

drivers/staging/media/hantro/hantro_g2.c

+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Hantro VPU codec driver
+ *
+ * Copyright (C) 2021 Collabora Ltd, Andrzej Pietrasiewicz <andrzej.p@collabora.com>
+ */
+
+#include "hantro_hw.h"
+#include "hantro_g2_regs.h"
+
+void hantro_g2_check_idle(struct hantro_dev *vpu)
+{
+	int i;
+
+	for (i = 0; i < 3; i++) {
+		u32 status;
+
+		/* Make sure the VPU is idle */
+		status = vdpu_read(vpu, G2_REG_INTERRUPT);
+		if (status & G2_REG_INTERRUPT_DEC_E) {
+			dev_warn(vpu->dev, "device still running, aborting");
+			status |= G2_REG_INTERRUPT_DEC_ABORT_E | G2_REG_INTERRUPT_DEC_IRQ_DIS;
+			vdpu_write(vpu, status, G2_REG_INTERRUPT);
+		}
+	}
+}

drivers/staging/media/hantro/hantro_g2_hevc_dec.c

@@ -8,20 +8,6 @@
 #include "hantro_hw.h"
 #include "hantro_g2_regs.h"
 
-#define HEVC_DEC_MODE	0xC
-
-#define BUS_WIDTH_32		0
-#define BUS_WIDTH_64		1
-#define BUS_WIDTH_128		2
-#define BUS_WIDTH_256		3
-
-static inline void hantro_write_addr(struct hantro_dev *vpu,
-				     unsigned long offset,
-				     dma_addr_t addr)
-{
-	vdpu_write(vpu, addr & 0xffffffff, offset);
-}
-
 static void prepare_tile_info_buffer(struct hantro_ctx *ctx)
 {
 	struct hantro_dev *vpu = ctx->dev;
@@ -566,23 +552,6 @@ static void prepare_scaling_list_buffer(struct hantro_ctx *ctx)
 	hantro_write_addr(vpu, G2_HEVC_SCALING_LIST_ADDR, ctx->hevc_dec.scaling_lists.dma);
 }
 
-static void hantro_g2_check_idle(struct hantro_dev *vpu)
-{
-	int i;
-
-	for (i = 0; i < 3; i++) {
-		u32 status;
-
-		/* Make sure the VPU is idle */
-		status = vdpu_read(vpu, G2_REG_INTERRUPT);
-		if (status & G2_REG_INTERRUPT_DEC_E) {
-			dev_warn(vpu->dev, "device still running, aborting");
-			status |= G2_REG_INTERRUPT_DEC_ABORT_E | G2_REG_INTERRUPT_DEC_IRQ_DIS;
-			vdpu_write(vpu, status, G2_REG_INTERRUPT);
-		}
-	}
-}
-
 int hantro_g2_hevc_dec_run(struct hantro_ctx *ctx)
 {
 	struct hantro_dev *vpu = ctx->dev;

drivers/staging/media/hantro/hantro_g2_regs.h

@@ -27,6 +27,13 @@
 #define G2_REG_INTERRUPT_DEC_IRQ_DIS	BIT(4)
 #define G2_REG_INTERRUPT_DEC_E		BIT(0)
 
+#define HEVC_DEC_MODE			0xc
+
+#define BUS_WIDTH_32			0
+#define BUS_WIDTH_64			1
+#define BUS_WIDTH_128			2
+#define BUS_WIDTH_256			3
+
 #define g2_strm_swap		G2_DEC_REG(2, 28, 0xf)
 #define g2_dirmv_swap		G2_DEC_REG(2, 20, 0xf)
 

drivers/staging/media/hantro/hantro_hw.h

@@ -312,4 +312,6 @@ void hantro_vp8_dec_exit(struct hantro_ctx *ctx);
 void hantro_vp8_prob_update(struct hantro_ctx *ctx,
 			    const struct v4l2_ctrl_vp8_frame *hdr);
 
+void hantro_g2_check_idle(struct hantro_dev *vpu);
+
 #endif /* HANTRO_HW_H_ */