[PATCH v12 03/12] media: rkisp1: Support devices lacking self path

Paul Elder
2024-02-16T09:55:32Z

Some versions of the ISP supported by the rkisp1 driver, such as the ISP
in the i.MX8MP, lack the self path. Support those ISP versions by adding
a self path feature flag, and massage the rest of the driver to support
the lack of a self path.

Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Tested-by: Adam Ford <aford173@gmail.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
---
Changes since v3:

- Document the feature bit
- Reorder commit

Changes since v2:

- Simplify rkisp1_path_count()
- Use the rkisp1_has_feature() macro
---
.../platform/rockchip/rkisp1/rkisp1-capture.c | 9 ++++++---
.../platform/rockchip/rkisp1/rkisp1-common.h | 15 +++++++++++++++
.../media/platform/rockchip/rkisp1/rkisp1-dev.c | 9 ++++++---
.../platform/rockchip/rkisp1/rkisp1-resizer.c | 6 ++++--
4 files changed, 31 insertions(+), 8 deletions(-)

diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
index 83a968487f24..ca95f62822fa 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
@@ -730,6 +730,7 @@ irqreturn_t rkisp1_capture_isr(int irq, void *ctx)
{
struct device *dev = ctx;
struct rkisp1_device *rkisp1 = dev_get_drvdata(dev);
+ unsigned int dev_count = rkisp1_path_count(rkisp1);
unsigned int i;
u32 status;

@@ -742,7 +743,7 @@ irqreturn_t rkisp1_capture_isr(int irq, void *ctx)

rkisp1_write(rkisp1, RKISP1_CIF_MI_ICR, status);

- for (i = 0; i < ARRAY_SIZE(rkisp1->capture_devs); ++i) {
+ for (i = 0; i < dev_count; ++i) {
struct rkisp1_capture *cap = &rkisp1->capture_devs[i];

if (!(status & RKISP1_CIF_MI_FRAME(cap)))
@@ -899,6 +900,7 @@ static void rkisp1_cap_stream_enable(struct rkisp1_capture *cap)
{
struct rkisp1_device *rkisp1 = cap->rkisp1;
struct rkisp1_capture *other = &rkisp1->capture_devs[cap->id ^ 1];
+ bool has_self_path = rkisp1_has_feature(rkisp1, SELF_PATH);

cap->ops->set_data_path(cap);
cap->ops->config(cap);
@@ -916,7 +918,7 @@ static void rkisp1_cap_stream_enable(struct rkisp1_capture *cap)
* This's also required because the second FE maybe corrupt
* especially when run at 120fps.
*/
- if (!other->is_streaming) {
+ if (!has_self_path || !other->is_streaming) {
/* force cfg update */
rkisp1_write(rkisp1, RKISP1_CIF_MI_INIT,
RKISP1_CIF_MI_INIT_SOFT_UPD);
@@ -1509,10 +1511,11 @@ rkisp1_capture_init(struct rkisp1_device *rkisp1, enum rkisp1_stream_id id)

int rkisp1_capture_devs_register(struct rkisp1_device *rkisp1)
{
+ unsigned int dev_count = rkisp1_path_count(rkisp1);
unsigned int i;
int ret;

- for (i = 0; i < ARRAY_SIZE(rkisp1->capture_devs); i++) {
+ for (i = 0; i < dev_count; i++) {
struct rkisp1_capture *cap = &rkisp1->capture_devs[i];

rkisp1_capture_init(rkisp1, i);
diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h b/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
index 6a811b7ef1b9..f7c251f79aa9 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
@@ -111,6 +111,7 @@ 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
*
* 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
@@ -119,6 +120,7 @@ enum rkisp1_isp_pad {
enum rkisp1_feature {
RKISP1_FEATURE_MIPI_CSI2 = BIT(0),
RKISP1_FEATURE_MAIN_STRIDE = BIT(1),
+ RKISP1_FEATURE_SELF_PATH = BIT(2),
};

#define rkisp1_has_feature(rkisp1, feature) \
@@ -531,6 +533,19 @@ int rkisp1_cap_enum_mbus_codes(struct rkisp1_capture *cap,
*/
const struct rkisp1_mbus_info *rkisp1_mbus_info_get_by_index(unsigned int index);

+/*
+ * rkisp1_path_count - Return the number of paths supported by the device
+ *
+ * Some devices only have a main path, while other device have both a main path
+ * and a self path. This function returns the number of paths that this device
+ * has, based on the feature flags. It should be used insted of checking
+ * ARRAY_SIZE of capture_devs/resizer_devs.
+ */
+static inline unsigned int rkisp1_path_count(struct rkisp1_device *rkisp1)
+{
+ return rkisp1_has_feature(rkisp1, SELF_PATH) ? 2 : 1;
+}
+
/*
* rkisp1_sd_adjust_crop_rect - adjust a rectangle to fit into another rectangle.
*
diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
index fd35fe76413a..f48a21985b18 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
@@ -358,6 +358,7 @@ static const struct dev_pm_ops rkisp1_pm_ops = {

static int rkisp1_create_links(struct rkisp1_device *rkisp1)
{
+ unsigned int dev_count = rkisp1_path_count(rkisp1);
unsigned int i;
int ret;

@@ -373,7 +374,7 @@ static int rkisp1_create_links(struct rkisp1_device *rkisp1)
}

/* create ISP->RSZ->CAP links */
- for (i = 0; i < 2; i++) {
+ for (i = 0; i < dev_count; i++) {
struct media_entity *resizer =
&rkisp1->resizer_devs[i].sd.entity;
struct media_entity *capture =
@@ -505,7 +506,8 @@ static const struct rkisp1_info px30_isp_info = {
.isrs = px30_isp_isrs,
.isr_size = ARRAY_SIZE(px30_isp_isrs),
.isp_ver = RKISP1_V12,
- .features = RKISP1_FEATURE_MIPI_CSI2,
+ .features = RKISP1_FEATURE_MIPI_CSI2
+ | RKISP1_FEATURE_SELF_PATH,
};

static const char * const rk3399_isp_clks[] = {
@@ -524,7 +526,8 @@ static const struct rkisp1_info rk3399_isp_info = {
.isrs = rk3399_isp_isrs,
.isr_size = ARRAY_SIZE(rk3399_isp_isrs),
.isp_ver = RKISP1_V10,
- .features = RKISP1_FEATURE_MIPI_CSI2,
+ .features = RKISP1_FEATURE_MIPI_CSI2
+ | RKISP1_FEATURE_SELF_PATH,
};

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 a8e377701302..dd77a31e6014 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-resizer.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-resizer.c
@@ -631,6 +631,7 @@ static int rkisp1_rsz_s_stream(struct v4l2_subdev *sd, int enable)
struct rkisp1_device *rkisp1 = rsz->rkisp1;
struct rkisp1_capture *other = &rkisp1->capture_devs[rsz->id ^ 1];
enum rkisp1_shadow_regs_when when = RKISP1_SHADOW_REGS_SYNC;
+ bool has_self_path = rkisp1_has_feature(rkisp1, SELF_PATH);
struct v4l2_subdev_state *sd_state;

if (!enable) {
@@ -639,7 +640,7 @@ static int rkisp1_rsz_s_stream(struct v4l2_subdev *sd, int enable)
return 0;
}

- if (other->is_streaming)
+ if (has_self_path && other->is_streaming)
when = RKISP1_SHADOW_REGS_ASYNC;

sd_state = v4l2_subdev_lock_and_get_active_state(sd);
@@ -731,10 +732,11 @@ static int rkisp1_rsz_register(struct rkisp1_resizer *rsz)

int rkisp1_resizer_devs_register(struct rkisp1_device *rkisp1)
{
+ unsigned int dev_count = rkisp1_path_count(rkisp1);
unsigned int i;
int ret;

- for (i = 0; i < ARRAY_SIZE(rkisp1->resizer_devs); i++) {
+ for (i = 0; i < dev_count; i++) {
struct rkisp1_resizer *rsz = &rkisp1->resizer_devs[i];

rsz->rkisp1 = rkisp1;
--
2.39.2