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

Liu Ying
2025-07-04T11:52:44Z

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@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