[PATCH 2/7] media: hantro: vp9: use double buffering if needed

[Jernej Skrabec <jernej.skrabec@gmail.com>]

Some G2 variants need double buffering to be enabled in order to work
correctly, like that found in Allwinner H6 SoC.

Add platform quirk for that.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
---
 drivers/staging/media/hantro/hantro.h            | 2 ++
 drivers/staging/media/hantro/hantro_g2_regs.h    | 1 +
 drivers/staging/media/hantro/hantro_g2_vp9_dec.c | 2 ++
 3 files changed, 5 insertions(+)

diff --git a/drivers/staging/media/hantro/hantro.h b/drivers/staging/media/hantro/hantro.h
index 33eb3e092cc1..d03824fa3222 100644
--- a/drivers/staging/media/hantro/hantro.h
+++ b/drivers/staging/media/hantro/hantro.h
@@ -73,6 +73,7 @@ struct hantro_irq {
  * @num_clocks:			number of clocks in the array
  * @reg_names:			array of register range names
  * @num_regs:			number of register range names in the array
+ * @double_buffer:		core needs double buffering
  */
 struct hantro_variant {
 	unsigned int enc_offset;
@@ -94,6 +95,7 @@ struct hantro_variant {
 	int num_clocks;
 	const char * const *reg_names;
 	int num_regs;
+	unsigned int double_buffer : 1;
 };
 
 /**
diff --git a/drivers/staging/media/hantro/hantro_g2_regs.h b/drivers/staging/media/hantro/hantro_g2_regs.h
index 9c857dd1ad9b..15a391a4650e 100644
--- a/drivers/staging/media/hantro/hantro_g2_regs.h
+++ b/drivers/staging/media/hantro/hantro_g2_regs.h
@@ -270,6 +270,7 @@
 #define g2_apf_threshold	G2_DEC_REG(55, 0, 0xffff)
 
 #define g2_clk_gate_e		G2_DEC_REG(58, 16, 0x1)
+#define g2_double_buffer_e	G2_DEC_REG(58, 15, 0x1)
 #define g2_buswidth		G2_DEC_REG(58, 8,  0x7)
 #define g2_max_burst		G2_DEC_REG(58, 0,  0xff)
 
diff --git a/drivers/staging/media/hantro/hantro_g2_vp9_dec.c b/drivers/staging/media/hantro/hantro_g2_vp9_dec.c
index e04242d10fa2..d4fc649a4da1 100644
--- a/drivers/staging/media/hantro/hantro_g2_vp9_dec.c
+++ b/drivers/staging/media/hantro/hantro_g2_vp9_dec.c
@@ -847,6 +847,8 @@ config_registers(struct hantro_ctx *ctx, const struct v4l2_ctrl_vp9_frame *dec_p
 	hantro_reg_write(ctx->dev, &g2_clk_gate_e, 1);
 	hantro_reg_write(ctx->dev, &g2_max_cb_size, 6);
 	hantro_reg_write(ctx->dev, &g2_min_cb_size, 3);
+	if (ctx->dev->variant->double_buffer)
+		hantro_reg_write(ctx->dev, &g2_double_buffer_e, 1);
 
 	config_output(ctx, dst, dec_params);
 
-- 
2.34.0