[PATCH v4 04/11] media: rkisp1: Support devices lacking dual crop

[Paul Elder]

Some versions of the ISP supported by the rkisp1 driver, such as the ISP
in the i.MX8MP, lack the dual crop registers and don't support cropping
at the resizer input. They instead rely on cropping in the Image
Stabilization module, at the output of the ISP, to modify the resizer
input size and implement digital zoom.

Support those ISP versions by addind a dual crop feature flag, and
mapping the resizer input crop rectangle to either the resizer dual crop
module or the image stabilization module.

Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
Signed-off-by: Paul Elder <paul.elder at ideasonboard.com>
---
 drivers/media/platform/rockchip/rkisp1/rkisp1-common.h  | 2 ++
 drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c     | 6 ++++--
 drivers/media/platform/rockchip/rkisp1/rkisp1-resizer.c | 6 ++++--
 3 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h b/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
index e54cf14b72b1..20b6134f235a 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
@@ -104,6 +104,7 @@ enum rkisp1_isp_pad {
  * @RKISP1_FEATURE_MIPI_CSI2: The ISP has an internal MIPI CSI-2 receiver
  * @RKISP1_FEATURE_MAIN_STRIDE: The ISP supports configurable stride on the main path
  * @RKISP1_FEATURE_SELF_PATH: The ISP has a self path
+ * @RKISP1_FEATURE_DUAL_CROP: The ISP has the dual crop block at the resizer input
  *
  * The ISP features are stored in a bitmask in &rkisp1_info.features and allow
  * the driver to implement support for features present in some ISP versions
@@ -113,6 +114,7 @@ enum rkisp1_feature {
 	RKISP1_FEATURE_MIPI_CSI2 = BIT(0),
 	RKISP1_FEATURE_MAIN_STRIDE = BIT(1),
 	RKISP1_FEATURE_SELF_PATH = BIT(2),
+	RKISP1_FEATURE_DUAL_CROP = BIT(3),
 };
 
 #define rkisp1_has_feature(rkisp1, feature) \
diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
index 7f5e2c6d1d73..a789a87ec644 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
@@ -476,7 +476,8 @@ static const struct rkisp1_info px30_isp_info = {
 	.isr_size = ARRAY_SIZE(px30_isp_isrs),
 	.isp_ver = RKISP1_V12,
 	.features = RKISP1_FEATURE_MIPI_CSI2
-		  | RKISP1_FEATURE_SELF_PATH,
+		  | RKISP1_FEATURE_SELF_PATH
+		  | RKISP1_FEATURE_DUAL_CROP,
 };
 
 static const char * const rk3399_isp_clks[] = {
@@ -496,7 +497,8 @@ static const struct rkisp1_info rk3399_isp_info = {
 	.isr_size = ARRAY_SIZE(rk3399_isp_isrs),
 	.isp_ver = RKISP1_V10,
 	.features = RKISP1_FEATURE_MIPI_CSI2
-		  | RKISP1_FEATURE_SELF_PATH,
+		  | RKISP1_FEATURE_SELF_PATH
+		  | RKISP1_FEATURE_DUAL_CROP,
 };
 
 static const struct of_device_id rkisp1_of_match[] = {
diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-resizer.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-resizer.c
index 12e735a8970f..c1aaeed58acc 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-resizer.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-resizer.c
@@ -641,7 +641,8 @@ static int rkisp1_rsz_s_stream(struct v4l2_subdev *sd, int enable)
 	struct v4l2_subdev_state *sd_state;
 
 	if (!enable) {
-		rkisp1_dcrop_disable(rsz, RKISP1_SHADOW_REGS_ASYNC);
+		if (rkisp1_has_feature(rkisp1, DUAL_CROP))
+			rkisp1_dcrop_disable(rsz, RKISP1_SHADOW_REGS_ASYNC);
 		rkisp1_rsz_disable(rsz, RKISP1_SHADOW_REGS_ASYNC);
 		return 0;
 	}
@@ -652,7 +653,8 @@ static int rkisp1_rsz_s_stream(struct v4l2_subdev *sd, int enable)
 	sd_state = v4l2_subdev_lock_and_get_active_state(sd);
 
 	rkisp1_rsz_config(rsz, sd_state, when);
-	rkisp1_dcrop_config(rsz, sd_state);
+	if (rkisp1_has_feature(rkisp1, DUAL_CROP))
+		rkisp1_dcrop_config(rsz, sd_state);
 
 	v4l2_subdev_unlock_state(sd_state);
 
-- 
2.39.2