[PATCH v2 4/5] media: rkisp1: Add feature flags for BLS and compand

[Laurent Pinchart]

From: Paul Elder <paul.elder at ideasonboard.com>

Add feature flags for the dedicated black level subtraction hardware
block and for the compand hardware block. The companding feature flag is
added on its own (as opposed to "the absence of BLS") because we will
need it later for when we add support for the companding block.

Skip BLS configuration when the BLS feature flag is unset, as devices
without the dedicated BLS block cannot configure a hardware block that
doesn't exist.

Signed-off-by: Paul Elder <paul.elder at ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
---
 drivers/media/platform/rockchip/rkisp1/rkisp1-common.h | 4 ++++
 drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c    | 9 ++++++---
 drivers/media/platform/rockchip/rkisp1/rkisp1-params.c | 7 +++++++
 3 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h b/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
index a52079261579..ca952fd0829b 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
@@ -116,6 +116,8 @@ enum rkisp1_isp_pad {
  * @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
  * @RKISP1_FEATURE_DMA_34BIT: The ISP uses 34-bit DMA addresses
+ * @RKISP1_FEATURE_BLS: The ISP has a dedicated BLS block
+ * @RKISP1_FEATURE_COMPAND: The ISP has a companding block
  *
  * 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
@@ -127,6 +129,8 @@ enum rkisp1_feature {
 	RKISP1_FEATURE_SELF_PATH = BIT(2),
 	RKISP1_FEATURE_DUAL_CROP = BIT(3),
 	RKISP1_FEATURE_DMA_34BIT = BIT(4),
+	RKISP1_FEATURE_BLS = BIT(5),
+	RKISP1_FEATURE_COMPAND = BIT(6),
 };
 
 #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 0535ce57e862..dd114ab77800 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
@@ -509,7 +509,8 @@ static const struct rkisp1_info px30_isp_info = {
 	.isp_ver = RKISP1_V12,
 	.features = RKISP1_FEATURE_MIPI_CSI2
 		  | RKISP1_FEATURE_SELF_PATH
-		  | RKISP1_FEATURE_DUAL_CROP,
+		  | RKISP1_FEATURE_DUAL_CROP
+		  | RKISP1_FEATURE_BLS,
 	.max_width = 3264,
 	.max_height = 2448,
 };
@@ -532,7 +533,8 @@ static const struct rkisp1_info rk3399_isp_info = {
 	.isp_ver = RKISP1_V10,
 	.features = RKISP1_FEATURE_MIPI_CSI2
 		  | RKISP1_FEATURE_SELF_PATH
-		  | RKISP1_FEATURE_DUAL_CROP,
+		  | RKISP1_FEATURE_DUAL_CROP
+		  | RKISP1_FEATURE_BLS,
 	.max_width = 4416,
 	.max_height = 3312,
 };
@@ -554,7 +556,8 @@ static const struct rkisp1_info imx8mp_isp_info = {
 	.isr_size = ARRAY_SIZE(imx8mp_isp_isrs),
 	.isp_ver = RKISP1_V_IMX8MP,
 	.features = RKISP1_FEATURE_MAIN_STRIDE
-		  | RKISP1_FEATURE_DMA_34BIT,
+		  | RKISP1_FEATURE_DMA_34BIT
+		  | RKISP1_FEATURE_COMPAND,
 	.max_width = 4096,
 	.max_height = 3072,
 };
diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c
index d3a7c7f55db0..20bc6d582527 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c
@@ -1268,6 +1268,12 @@ rkisp1_isp_isr_other_config(struct rkisp1_params *params,
 	module_cfg_update = new_params->module_cfg_update;
 	module_ens = new_params->module_ens;
 
+	if (!rkisp1_has_feature(params->rkisp1, BLS)) {
+		module_en_update &= ~RKISP1_CIF_ISP_MODULE_BLS;
+		module_cfg_update &= ~RKISP1_CIF_ISP_MODULE_BLS;
+		module_ens &= ~RKISP1_CIF_ISP_MODULE_BLS;
+	}
+
 	/* update dpc config */
 	if (module_cfg_update & RKISP1_CIF_ISP_MODULE_DPCC)
 		rkisp1_dpcc_config(params,
@@ -1851,6 +1857,7 @@ static const struct rkisp1_ext_params_handler {
 		.size		= sizeof(struct rkisp1_ext_params_bls_config),
 		.handler	= rkisp1_ext_params_bls,
 		.group		= RKISP1_EXT_PARAMS_BLOCK_GROUP_OTHERS,
+		.features	= RKISP1_FEATURE_BLS,
 	},
 	[RKISP1_EXT_PARAMS_BLOCK_TYPE_DPCC] = {
 		.size		= sizeof(struct rkisp1_ext_params_dpcc_config),
-- 
Regards,

Laurent Pinchart