media: rkvdec: Support per-variant interrupt handler

Prepare for supporting different variants with different interrupt
managers.

To support other variants specific function type later, introduce the
rkvdec_variant_ops struct.

Tested-by: Diederik de Haas <didi.debian@cknow.org>  # Rock 5B
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Detlev Casanova <detlev.casanova@collabora.com>
Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>

Author: cazou

drivers/media/platform/rockchip/rkvdec/rkvdec.c

@@ -1222,10 +1222,9 @@ static void rkvdec_iommu_restore(struct rkvdec_dev *rkvdec)
 	}
 }
 
-static irqreturn_t rkvdec_irq_handler(int irq, void *priv)
+static irqreturn_t rk3399_irq_handler(struct rkvdec_ctx *ctx)
 {
-	struct rkvdec_dev *rkvdec = priv;
-	struct rkvdec_ctx *ctx = v4l2_m2m_get_curr_priv(rkvdec->m2m_dev);
+	struct rkvdec_dev *rkvdec = ctx->dev;
 	enum vb2_buffer_state state;
 	u32 status;
 
@@ -1246,6 +1245,15 @@ static irqreturn_t rkvdec_irq_handler(int irq, void *priv)
 	return IRQ_HANDLED;
 }
 
+static irqreturn_t rkvdec_irq_handler(int irq, void *priv)
+{
+	struct rkvdec_dev *rkvdec = priv;
+	struct rkvdec_ctx *ctx = v4l2_m2m_get_curr_priv(rkvdec->m2m_dev);
+	const struct rkvdec_variant *variant = rkvdec->variant;
+
+	return variant->ops->irq_handler(ctx);
+}
+
 static void rkvdec_watchdog_func(struct work_struct *work)
 {
 	struct rkvdec_dev *rkvdec;
@@ -1261,23 +1269,30 @@ static void rkvdec_watchdog_func(struct work_struct *work)
 	}
 }
 
+static const struct rkvdec_variant_ops rk3399_variant_ops = {
+	.irq_handler = rk3399_irq_handler,
+};
+
 static const struct rkvdec_variant rk3288_rkvdec_variant = {
 	.num_regs = 68,
 	.coded_fmts = rk3288_coded_fmts,
 	.num_coded_fmts = ARRAY_SIZE(rk3288_coded_fmts),
+	.ops = &rk3399_variant_ops,
 };
 
 static const struct rkvdec_variant rk3328_rkvdec_variant = {
 	.num_regs = 109,
 	.coded_fmts = rkvdec_coded_fmts,
 	.num_coded_fmts = ARRAY_SIZE(rkvdec_coded_fmts),
+	.ops = &rk3399_variant_ops,
 	.quirks = RKVDEC_QUIRK_DISABLE_QOS,
 };
 
 static const struct rkvdec_variant rk3399_rkvdec_variant = {
 	.num_regs = 78,
 	.coded_fmts = rkvdec_coded_fmts,
 	.num_coded_fmts = ARRAY_SIZE(rkvdec_coded_fmts),
+	.ops = &rk3399_variant_ops,
 };
 
 static const struct of_device_id of_rkvdec_match[] = {

drivers/media/platform/rockchip/rkvdec/rkvdec.h

@@ -67,12 +67,17 @@ vb2_to_rkvdec_decoded_buf(struct vb2_buffer *buf)
 			    base.vb.vb2_buf);
 }
 
+struct rkvdec_variant_ops {
+	irqreturn_t (*irq_handler)(struct rkvdec_ctx *ctx);
+};
+
 struct rkvdec_variant {
 	unsigned int num_regs;
 	const struct rkvdec_coded_fmt_desc *coded_fmts;
 	size_t num_coded_fmts;
 	const struct rcb_size_info *rcb_sizes;
 	size_t num_rcb_sizes;
+	const struct rkvdec_variant_ops *ops;
 	unsigned int quirks;
 };