[media] VPU: mediatek: Add decode support

VPU driver add decode support

[mchehab@s-opensource.org: fix a kernel-doc markup]
Signed-off-by: Andrew-CT Chen <andrew-ct.chen@mediatek.com>
Signed-off-by: Tiffany Lin <tiffany.lin@mediatek.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/platform/mtk-vpu/mtk_vpu.c

@@ -134,6 +134,8 @@ struct vpu_wdt {
  *
  * @signaled:		the signal of vpu initialization completed
  * @fw_ver:		VPU firmware version
+ * @dec_capability:	decoder capability which is not used for now and
+ *			the value is reserved for future use
  * @enc_capability:	encoder capability which is not used for now and
  *			the value is reserved for future use
  * @wq:			wait queue for VPU initialization status
@@ -141,6 +143,7 @@ struct vpu_wdt {
 struct vpu_run {
 	u32 signaled;
 	char fw_ver[VPU_FW_VER_LEN];
+	unsigned int	dec_capability;
 	unsigned int	enc_capability;
 	wait_queue_head_t wq;
 };
@@ -415,6 +418,14 @@ int vpu_wdt_reg_handler(struct platform_device *pdev,
 }
 EXPORT_SYMBOL_GPL(vpu_wdt_reg_handler);
 
+unsigned int vpu_get_vdec_hw_capa(struct platform_device *pdev)
+{
+	struct mtk_vpu *vpu = platform_get_drvdata(pdev);
+
+	return vpu->run.dec_capability;
+}
+EXPORT_SYMBOL_GPL(vpu_get_vdec_hw_capa);
+
 unsigned int vpu_get_venc_hw_capa(struct platform_device *pdev)
 {
 	struct mtk_vpu *vpu = platform_get_drvdata(pdev);
@@ -600,6 +611,7 @@ static void vpu_init_ipi_handler(void *data, unsigned int len, void *priv)
 
 	vpu->run.signaled = run->signaled;
 	strncpy(vpu->run.fw_ver, run->fw_ver, VPU_FW_VER_LEN);
+	vpu->run.dec_capability = run->dec_capability;
 	vpu->run.enc_capability = run->enc_capability;
 	wake_up_interruptible(&vpu->run.wq);
 }

drivers/media/platform/mtk-vpu/mtk_vpu.h

@@ -31,21 +31,36 @@ typedef void (*ipi_handler_t) (void *data,
  * enum ipi_id - the id of inter-processor interrupt
  *
  * @IPI_VPU_INIT:	 The interrupt from vpu is to notfiy kernel
-			 VPU initialization completed.
-			 IPI_VPU_INIT is sent from VPU when firmware is
-			 loaded. AP doesn't need to send IPI_VPU_INIT
-			 command to VPU.
-			 For other IPI below, AP should send the request
-			 to VPU to trigger the interrupt.
+ *			 VPU initialization completed.
+ *			 IPI_VPU_INIT is sent from VPU when firmware is
+ *			 loaded. AP doesn't need to send IPI_VPU_INIT
+ *			 command to VPU.
+ *			 For other IPI below, AP should send the request
+ *			 to VPU to trigger the interrupt.
+ * @IPI_VDEC_H264:	 The interrupt from vpu is to notify kernel to
+ *			 handle H264 vidoe decoder job, and vice versa.
+ *			 Decode output format is always MT21 no matter what
+ *			 the input format is.
+ * @IPI_VDEC_VP8:	 The interrupt from is to notify kernel to
+ *			 handle VP8 video decoder job, and vice versa.
+ *			 Decode output format is always MT21 no matter what
+ *			 the input format is.
+ * @IPI_VDEC_VP9:	 The interrupt from vpu is to notify kernel to
+ *			 handle VP9 video decoder job, and vice versa.
+ *			 Decode output format is always MT21 no matter what
+ *			 the input format is.
  * @IPI_VENC_H264:	 The interrupt from vpu is to notify kernel to
-			 handle H264 video encoder job, and vice versa.
+ *			 handle H264 video encoder job, and vice versa.
  * @IPI_VENC_VP8:	 The interrupt fro vpu is to notify kernel to
-			 handle VP8 video encoder job,, and vice versa.
+ *			 handle VP8 video encoder job,, and vice versa.
  * @IPI_MAX:		 The maximum IPI number
  */
 
 enum ipi_id {
 	IPI_VPU_INIT = 0,
+	IPI_VDEC_H264,
+	IPI_VDEC_VP8,
+	IPI_VDEC_VP9,
 	IPI_VENC_H264,
 	IPI_VENC_VP8,
 	IPI_MAX,
@@ -55,10 +70,12 @@ enum ipi_id {
  * enum rst_id - reset id to register reset function for VPU watchdog timeout
  *
  * @VPU_RST_ENC: encoder reset id
+ * @VPU_RST_DEC: decoder reset id
  * @VPU_RST_MAX: maximum reset id
  */
 enum rst_id {
 	VPU_RST_ENC,
+	VPU_RST_DEC,
 	VPU_RST_MAX,
 };
 
@@ -125,6 +142,16 @@ struct platform_device *vpu_get_plat_device(struct platform_device *pdev);
 int vpu_wdt_reg_handler(struct platform_device *pdev,
 			void vpu_wdt_reset_func(void *),
 			void *priv, enum rst_id id);
+
+/**
+ * vpu_get_vdec_hw_capa - get video decoder hardware capability
+ *
+ * @pdev:	VPU platform device
+ *
+ * Return: video decoder hardware capability
+ **/
+unsigned int vpu_get_vdec_hw_capa(struct platform_device *pdev);
+
 /**
  * vpu_get_venc_hw_capa - get video encoder hardware capability
  *