media: mtk-vcodec: add SCP firmware ops

Add support for communicating with the SCP firmware, which will be used
by MT8183.

[acourbot: refactor, cleanup and split]
[hverkuil: fixed some checkpatch alignment warnings]
Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
Co-developed-by: Alexandre Courbot <acourbot@chromium.org>
Signed-off-by: Alexandre Courbot <acourbot@chromium.org>
Acked-by: Tiffany Lin <tiffany.lin@mediatek.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/platform/Kconfig

@@ -256,6 +256,7 @@ config VIDEO_MEDIATEK_VCODEC
 	select VIDEOBUF2_DMA_CONTIG
 	select V4L2_MEM2MEM_DEV
 	select VIDEO_MEDIATEK_VPU
+	select MTK_SCP
 	help
 	    Mediatek video codec driver provides HW capability to
 	    encode and decode in a range of video formats

drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c

@@ -225,6 +225,9 @@ static int mtk_vcodec_probe(struct platform_device *pdev)
 	if (!of_property_read_u32(pdev->dev.of_node, "mediatek,vpu",
 				  &rproc_phandle)) {
 		fw_type = VPU;
+	} else if (!of_property_read_u32(pdev->dev.of_node, "mediatek,scp",
+					 &rproc_phandle)) {
+		fw_type = SCP;
 	} else {
 		mtk_v4l2_err("Could not get vdec IPI device");
 		return -ENODEV;

drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_drv.c

@@ -233,6 +233,9 @@ static int mtk_vcodec_probe(struct platform_device *pdev)
 	if (!of_property_read_u32(pdev->dev.of_node, "mediatek,vpu",
 				  &rproc_phandle)) {
 		fw_type = VPU;
+	} else if (!of_property_read_u32(pdev->dev.of_node, "mediatek,scp",
+					 &rproc_phandle)) {
+		fw_type = SCP;
 	} else {
 		mtk_v4l2_err("Could not get venc IPI device");
 		return -ENODEV;

drivers/media/platform/mtk-vcodec/mtk_vcodec_fw.c

@@ -19,6 +19,7 @@ struct mtk_vcodec_fw {
 	enum mtk_vcodec_fw_type type;
 	const struct mtk_vcodec_fw_ops *ops;
 	struct platform_device *pdev;
+	struct mtk_scp *scp;
 };
 
 static int mtk_vcodec_vpu_load_firmware(struct mtk_vcodec_fw *fw)
@@ -72,6 +73,49 @@ static const struct mtk_vcodec_fw_ops mtk_vcodec_vpu_msg = {
 	.ipi_send = mtk_vcodec_vpu_ipi_send,
 };
 
+static int mtk_vcodec_scp_load_firmware(struct mtk_vcodec_fw *fw)
+{
+	return rproc_boot(scp_get_rproc(fw->scp));
+}
+
+static unsigned int mtk_vcodec_scp_get_vdec_capa(struct mtk_vcodec_fw *fw)
+{
+	return scp_get_vdec_hw_capa(fw->scp);
+}
+
+static unsigned int mtk_vcodec_scp_get_venc_capa(struct mtk_vcodec_fw *fw)
+{
+	return scp_get_venc_hw_capa(fw->scp);
+}
+
+static void *mtk_vcodec_vpu_scp_dm_addr(struct mtk_vcodec_fw *fw,
+					u32 dtcm_dmem_addr)
+{
+	return scp_mapping_dm_addr(fw->scp, dtcm_dmem_addr);
+}
+
+static int mtk_vcodec_scp_set_ipi_register(struct mtk_vcodec_fw *fw, int id,
+					   mtk_vcodec_ipi_handler handler,
+					   const char *name, void *priv)
+{
+	return scp_ipi_register(fw->scp, id, handler, priv);
+}
+
+static int mtk_vcodec_scp_ipi_send(struct mtk_vcodec_fw *fw, int id, void *buf,
+				   unsigned int len, unsigned int wait)
+{
+	return scp_ipi_send(fw->scp, id, buf, len, wait);
+}
+
+static const struct mtk_vcodec_fw_ops mtk_vcodec_rproc_msg = {
+	.load_firmware = mtk_vcodec_scp_load_firmware,
+	.get_vdec_capa = mtk_vcodec_scp_get_vdec_capa,
+	.get_venc_capa = mtk_vcodec_scp_get_venc_capa,
+	.map_dm_addr = mtk_vcodec_vpu_scp_dm_addr,
+	.ipi_register = mtk_vcodec_scp_set_ipi_register,
+	.ipi_send = mtk_vcodec_scp_ipi_send,
+};
+
 static void mtk_vcodec_reset_handler(void *priv)
 {
 	struct mtk_vcodec_dev *dev = priv;
@@ -95,6 +139,7 @@ struct mtk_vcodec_fw *mtk_vcodec_fw_select(struct mtk_vcodec_dev *dev,
 	const struct mtk_vcodec_fw_ops *ops;
 	struct mtk_vcodec_fw *fw;
 	struct platform_device *fw_pdev = NULL;
+	struct mtk_scp *scp = NULL;
 
 	switch (type) {
 	case VPU:
@@ -107,6 +152,14 @@ struct mtk_vcodec_fw *mtk_vcodec_fw_select(struct mtk_vcodec_dev *dev,
 		vpu_wdt_reg_handler(fw_pdev, mtk_vcodec_reset_handler,
 				    dev, rst_id);
 		break;
+	case SCP:
+		ops = &mtk_vcodec_rproc_msg;
+		scp = scp_get(dev->plat_dev);
+		if (!scp) {
+			mtk_v4l2_err("could not get vdec scp handle");
+			return ERR_PTR(-EPROBE_DEFER);
+		}
+		break;
 	default:
 		mtk_v4l2_err("invalid vcodec fw type");
 		return ERR_PTR(-EINVAL);
@@ -119,6 +172,7 @@ struct mtk_vcodec_fw *mtk_vcodec_fw_select(struct mtk_vcodec_dev *dev,
 	fw->type = type;
 	fw->ops = ops;
 	fw->pdev = fw_pdev;
+	fw->scp = scp;
 
 	return fw;
 }
@@ -130,6 +184,9 @@ void mtk_vcodec_fw_release(struct mtk_vcodec_fw *fw)
 	case VPU:
 		put_device(&fw->pdev->dev);
 		break;
+	case SCP:
+		scp_put(fw->scp);
+		break;
 	}
 }
 EXPORT_SYMBOL_GPL(mtk_vcodec_fw_release);

drivers/media/platform/mtk-vcodec/mtk_vcodec_fw.h

@@ -4,6 +4,7 @@
 #define _MTK_VCODEC_FW_H_
 
 #include <linux/remoteproc.h>
+#include <linux/remoteproc/mtk_scp.h>
 
 #include "../mtk-vpu/mtk_vpu.h"
 
@@ -11,6 +12,7 @@ struct mtk_vcodec_dev;
 
 enum mtk_vcodec_fw_type {
 	VPU,
+	SCP,
 };
 
 struct mtk_vcodec_fw;