media: rkisp1: Support devices lacking dual crop

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.

Add a dual crop feature flag to distinguish the versions of the ISP that
support dual crop from those that don't, and make sure that the sink
crop is set to the sink format when dual crop is not supported.

Signed-off-by: Paul Elder <[email protected]>
Tested-by: Alexander Stein <[email protected]>
Tested-by: Adam Ford <[email protected]>
Reviewed-by: Tomi Valkeinen <[email protected]>
Reviewed-by: Laurent Pinchart <[email protected]>
Signed-off-by: Laurent Pinchart <[email protected]>

Author: Rahi374

drivers/media/platform/rockchip/rkisp1/rkisp1-common.h

@@ -112,6 +112,7 @@ 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
@@ -121,6 +122,7 @@ 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) \

drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c

@@ -485,7 +485,8 @@ 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[] = {
@@ -505,7 +506,8 @@ 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[] = {

drivers/media/platform/rockchip/rkisp1/rkisp1-resizer.c

@@ -444,11 +444,12 @@ static void rkisp1_rsz_set_sink_crop(struct rkisp1_resizer *rsz,
 	sink_fmt = v4l2_subdev_state_get_format(sd_state, RKISP1_RSZ_PAD_SINK);
 	sink_crop = v4l2_subdev_state_get_crop(sd_state, RKISP1_RSZ_PAD_SINK);
 
-	/* Not crop for MP bayer raw data */
+	/* Not crop for MP bayer raw data, or for devices lacking dual crop. */
 	mbus_info = rkisp1_mbus_info_get_by_code(sink_fmt->code);
 
-	if (rsz->id == RKISP1_MAINPATH &&
-	    mbus_info->pixel_enc == V4L2_PIXEL_ENC_BAYER) {
+	if ((rsz->id == RKISP1_MAINPATH &&
+	     mbus_info->pixel_enc == V4L2_PIXEL_ENC_BAYER) ||
+	    !rkisp1_has_feature(rsz->rkisp1, DUAL_CROP)) {
 		sink_crop->left = 0;
 		sink_crop->top = 0;
 		sink_crop->width = sink_fmt->width;
@@ -635,7 +636,8 @@ 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;
 	}
@@ -646,7 +648,8 @@ 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);