[PATCH 13/14] drm/imx: dc-fu: Get DPR channel

[Liu Ying]

Add a helper dc_fu_get_dprc() to get DPR channel for FetchUnit.
And, call it from dc_{fl,fw)_bind() to get DPR channels for
FetchLayer and FetchWarp.

Signed-off-by: Liu Ying <victor.liu at nxp.com>
---
 drivers/gpu/drm/imx/dc/dc-fl.c |  7 ++++++-
 drivers/gpu/drm/imx/dc/dc-fu.c | 18 ++++++++++++++++++
 drivers/gpu/drm/imx/dc/dc-fu.h |  5 +++++
 drivers/gpu/drm/imx/dc/dc-fw.c |  7 ++++++-
 4 files changed, 35 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/imx/dc/dc-fl.c b/drivers/gpu/drm/imx/dc/dc-fl.c
index 3ce24c72aa13e8aa150c0152a5a1ea3d0fa90b7e..a1835f43da0dc5cf0c83d93f16658b485011e285 100644
--- a/drivers/gpu/drm/imx/dc/dc-fl.c
+++ b/drivers/gpu/drm/imx/dc/dc-fl.c
@@ -101,13 +101,18 @@ static int dc_fl_bind(struct device *dev, struct device *master, void *data)
 	void __iomem *base_cfg;
 	struct dc_fl *fl;
 	struct dc_fu *fu;
-	int i, id;
+	int ret, i, id;
 
 	fl = devm_kzalloc(dev, sizeof(*fl), GFP_KERNEL);
 	if (!fl)
 		return -ENOMEM;
 
 	fu = &fl->fu;
+	fu->dev = dev;
+
+	ret = dc_fu_get_dprc(fu);
+	if (ret)
+		return ret;
 
 	res_pec = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 
diff --git a/drivers/gpu/drm/imx/dc/dc-fu.c b/drivers/gpu/drm/imx/dc/dc-fu.c
index b36d3034b8d5962eaab212b6b65ebbb5c29f978c..47d436abb65157de7cab74565e44b199be76de52 100644
--- a/drivers/gpu/drm/imx/dc/dc-fu.c
+++ b/drivers/gpu/drm/imx/dc/dc-fu.c
@@ -10,6 +10,7 @@
 
 #include "dc-fu.h"
 #include "dc-pe.h"
+#include "dc-prg.h"
 
 /* STATICCONTROL */
 #define SHDLDREQSTICKY_MASK		GENMASK(31, 24)
@@ -256,3 +257,20 @@ void dc_fu_common_hw_init(struct dc_fu *fu)
 		dc_fu_set_pixel_blend_mode(fu, i);
 	}
 }
+
+int dc_fu_get_dprc(struct dc_fu *fu)
+{
+	struct dc_prg *prg;
+
+	prg = dc_prg_lookup_by_phandle(fu->dev, "fsl,prg", 0);
+	if (!prg)
+		return dev_err_probe(fu->dev, -EPROBE_DEFER,
+				     "failed to lookup PRG\n");
+
+	fu->dprc = dc_prg_get_dprc(prg);
+	if (!fu->dprc)
+		return dev_err_probe(fu->dev, -EPROBE_DEFER,
+				     "failed to get DPR channel\n");
+
+	return 0;
+}
diff --git a/drivers/gpu/drm/imx/dc/dc-fu.h b/drivers/gpu/drm/imx/dc/dc-fu.h
index 518d1af49f5ae9d4f67da5e6c2e80abd7e962120..44b9497e53580589a05bcb180eb2312ea4449da4 100644
--- a/drivers/gpu/drm/imx/dc/dc-fu.h
+++ b/drivers/gpu/drm/imx/dc/dc-fu.h
@@ -8,11 +8,13 @@
 
 #include <linux/bitfield.h>
 #include <linux/bits.h>
+#include <linux/device.h>
 #include <linux/regmap.h>
 #include <linux/types.h>
 
 #include <drm/drm_fourcc.h>
 
+#include "dc-dprc.h"
 #include "dc-pe.h"
 
 #define FRAC_OFFSET			0x28
@@ -99,6 +101,7 @@ struct dc_fu_ops {
 };
 
 struct dc_fu {
+	struct device *dev;
 	struct regmap *reg_pec;
 	struct regmap *reg_cfg;
 	char name[21];
@@ -114,6 +117,7 @@ struct dc_fu {
 	enum dc_link_id link_id;
 	struct dc_fu_ops ops;
 	struct dc_lb *lb;
+	struct dc_dprc *dprc;
 };
 
 extern const struct dc_fu_ops dc_fu_common_ops;
@@ -123,6 +127,7 @@ void dc_fu_get_pixel_format_shifts(struct dc_fu *fu, u32 format, u32 *shifts);
 void dc_fu_shdldreq_sticky(struct dc_fu *fu, u8 layer_mask);
 void dc_fu_set_src_bpp(struct dc_fu *fu, enum dc_fu_frac frac, unsigned int bpp);
 void dc_fu_common_hw_init(struct dc_fu *fu);
+int dc_fu_get_dprc(struct dc_fu *fu);
 
 const struct dc_fu_ops *dc_fu_get_ops(struct dc_fu *fu);
 
diff --git a/drivers/gpu/drm/imx/dc/dc-fw.c b/drivers/gpu/drm/imx/dc/dc-fw.c
index acb2d4d9e2ecd6d36dbab050f25b560d9ec9aba5..c2e60741bc871c6976ead53f132b60f19352aab3 100644
--- a/drivers/gpu/drm/imx/dc/dc-fw.c
+++ b/drivers/gpu/drm/imx/dc/dc-fw.c
@@ -131,13 +131,18 @@ static int dc_fw_bind(struct device *dev, struct device *master, void *data)
 	void __iomem *base_cfg;
 	struct dc_fw *fw;
 	struct dc_fu *fu;
-	int i, id;
+	int ret, i, id;
 
 	fw = devm_kzalloc(dev, sizeof(*fw), GFP_KERNEL);
 	if (!fw)
 		return -ENOMEM;
 
 	fu = &fw->fu;
+	fu->dev = dev;
+
+	ret = dc_fu_get_dprc(fu);
+	if (ret)
+		return ret;
 
 	base_pec = devm_platform_get_and_ioremap_resource(pdev, 0, &res_pec);
 	if (IS_ERR(base_pec))

-- 
2.34.1