[PATCH v3 1/4] media: camss: csiphy: Move to hardcode CSI Clock Lane number

Robert Foss
2021-11-18T12:49:13Z

QCOM ISPs do not support having a programmable CSI Clock Lane number.

In order to accurately reflect this, the different CSIPHY HW versions
need to have their own register layer for computing lane masks.

Signed-off-by: Robert Foss <robert.foss@linaro.org>
---
.../qcom/camss/camss-csiphy-2ph-1-0.c | 19 +++++++++++++++--
.../qcom/camss/camss-csiphy-3ph-1-0.c | 17 ++++++++++++++-
.../media/platform/qcom/camss/camss-csiphy.c | 21 +------------------
.../media/platform/qcom/camss/camss-csiphy.h | 7 +++++++
4 files changed, 41 insertions(+), 23 deletions(-)

diff --git a/drivers/media/platform/qcom/camss/camss-csiphy-2ph-1-0.c b/drivers/media/platform/qcom/camss/camss-csiphy-2ph-1-0.c
index 30b454c369ab..cd4a8c369234 100644
--- a/drivers/media/platform/qcom/camss/camss-csiphy-2ph-1-0.c
+++ b/drivers/media/platform/qcom/camss/camss-csiphy-2ph-1-0.c
@@ -16,6 +16,7 @@

#define CAMSS_CSI_PHY_LNn_CFG2(n) (0x004 + 0x40 * (n))
#define CAMSS_CSI_PHY_LNn_CFG3(n) (0x008 + 0x40 * (n))
+#define CAMSS_CSI_PHY_LN_CLK 1
#define CAMSS_CSI_PHY_GLBL_RESET 0x140
#define CAMSS_CSI_PHY_GLBL_PWR_CFG 0x144
#define CAMSS_CSI_PHY_GLBL_IRQ_CMD 0x164
@@ -26,6 +27,19 @@
#define CAMSS_CSI_PHY_GLBL_T_INIT_CFG0 0x1ec
#define CAMSS_CSI_PHY_T_WAKEUP_CFG0 0x1f4

+static u8 csiphy_get_lane_mask(struct csiphy_lanes_cfg *lane_cfg)
+{
+ u8 lane_mask;
+ int i;
+
+ lane_mask = 1 << CAMSS_CSI_PHY_LN_CLK;
+
+ for (i = 0; i < lane_cfg->num_data; i++)
+ lane_mask |= 1 << lane_cfg->data[i].pos;
+
+ return lane_mask;
+}
+
static void csiphy_hw_version_read(struct csiphy_device *csiphy,
struct device *dev)
{
@@ -105,7 +119,7 @@ static void csiphy_lanes_enable(struct csiphy_device *csiphy,

for (i = 0; i <= c->num_data; i++) {
if (i == c->num_data)
- l = c->clk.pos;
+ l = CAMSS_CSI_PHY_LN_CLK;
else
l = c->data[i].pos;

@@ -129,7 +143,7 @@ static void csiphy_lanes_disable(struct csiphy_device *csiphy,

for (i = 0; i <= c->num_data; i++) {
if (i == c->num_data)
- l = c->clk.pos;
+ l = CAMSS_CSI_PHY_LN_CLK;
else
l = c->data[i].pos;

@@ -167,6 +181,7 @@ static irqreturn_t csiphy_isr(int irq, void *dev)
}

const struct csiphy_hw_ops csiphy_ops_2ph_1_0 = {
+ .get_lane_mask = csiphy_get_lane_mask,
.hw_version_read = csiphy_hw_version_read,
.reset = csiphy_reset,
.lanes_enable = csiphy_lanes_enable,
diff --git a/drivers/media/platform/qcom/camss/camss-csiphy-3ph-1-0.c b/drivers/media/platform/qcom/camss/camss-csiphy-3ph-1-0.c
index e318c822ab04..cde6b3a10b9e 100644
--- a/drivers/media/platform/qcom/camss/camss-csiphy-3ph-1-0.c
+++ b/drivers/media/platform/qcom/camss/camss-csiphy-3ph-1-0.c
@@ -43,6 +43,7 @@
#define CSIPHY_3PH_LNn_CSI_LANE_CTRL15_SWI_SOT_SYMBOL 0xb8

#define CSIPHY_3PH_CMN_CSI_COMMON_CTRLn(n) (0x800 + 0x4 * (n))
+#define CSIPHY_3PH_CMN_CSI_COMMON_CTRL5_CLK_ENABLE BIT(7)
#define CSIPHY_3PH_CMN_CSI_COMMON_CTRL6_COMMON_PWRDN_B BIT(0)
#define CSIPHY_3PH_CMN_CSI_COMMON_CTRL6_SHOW_REV_ID BIT(1)
#define CSIPHY_3PH_CMN_CSI_COMMON_STATUSn(n) (0x8b0 + 0x4 * (n))
@@ -320,6 +321,19 @@ static void csiphy_gen2_config_lanes(struct csiphy_device *csiphy,
}
}

+static u8 csiphy_get_lane_mask(struct csiphy_lanes_cfg *lane_cfg)
+{
+ u8 lane_mask;
+ int i;
+
+ lane_mask = CSIPHY_3PH_CMN_CSI_COMMON_CTRL5_CLK_ENABLE;
+
+ for (i = 0; i < lane_cfg->num_data; i++)
+ lane_mask |= 1 << lane_cfg->data[i].pos;
+
+ return lane_mask;
+}
+
static void csiphy_lanes_enable(struct csiphy_device *csiphy,
struct csiphy_config *cfg,
s64 link_freq, u8 lane_mask)
@@ -331,7 +345,7 @@ static void csiphy_lanes_enable(struct csiphy_device *csiphy,

settle_cnt = csiphy_settle_cnt_calc(link_freq, csiphy->timer_clk_rate);

- val = BIT(c->clk.pos);
+ val = CSIPHY_3PH_CMN_CSI_COMMON_CTRL5_CLK_ENABLE;
for (i = 0; i < c->num_data; i++)
val |= BIT(c->data[i].pos * 2);

@@ -397,6 +411,7 @@ static void csiphy_lanes_disable(struct csiphy_device *csiphy,
}

const struct csiphy_hw_ops csiphy_ops_3ph_1_0 = {
+ .get_lane_mask = csiphy_get_lane_mask,
.hw_version_read = csiphy_hw_version_read,
.reset = csiphy_reset,
.lanes_enable = csiphy_lanes_enable,
diff --git a/drivers/media/platform/qcom/camss/camss-csiphy.c b/drivers/media/platform/qcom/camss/camss-csiphy.c
index 24eec16197e7..ac7e96e6b7cd 100644
--- a/drivers/media/platform/qcom/camss/camss-csiphy.c
+++ b/drivers/media/platform/qcom/camss/camss-csiphy.c
@@ -229,25 +229,6 @@ static int csiphy_set_power(struct v4l2_subdev *sd, int on)
return 0;
}

-/*
- * csiphy_get_lane_mask - Calculate CSI2 lane mask configuration parameter
- * @lane_cfg - CSI2 lane configuration
- *
- * Return lane mask
- */
-static u8 csiphy_get_lane_mask(struct csiphy_lanes_cfg *lane_cfg)
-{
- u8 lane_mask;
- int i;
-
- lane_mask = 1 << lane_cfg->clk.pos;
-
- for (i = 0; i < lane_cfg->num_data; i++)
- lane_mask |= 1 << lane_cfg->data[i].pos;
-
- return lane_mask;
-}
-
/*
* csiphy_stream_on - Enable streaming on CSIPHY module
* @csiphy: CSIPHY device
@@ -261,7 +242,7 @@ static int csiphy_stream_on(struct csiphy_device *csiphy)
{
struct csiphy_config *cfg = &csiphy->cfg;
s64 link_freq;
- u8 lane_mask = csiphy_get_lane_mask(&cfg->csi2->lane_cfg);
+ u8 lane_mask = csiphy->ops->get_lane_mask(&cfg->csi2->lane_cfg);
u8 bpp = csiphy_get_bpp(csiphy->formats, csiphy->nformats,
csiphy->fmt[MSM_CSIPHY_PAD_SINK].code);
u8 num_lanes = csiphy->cfg.csi2->lane_cfg.num_data;
diff --git a/drivers/media/platform/qcom/camss/camss-csiphy.h b/drivers/media/platform/qcom/camss/camss-csiphy.h
index d71b8bc6ec00..1c14947f92d3 100644
--- a/drivers/media/platform/qcom/camss/camss-csiphy.h
+++ b/drivers/media/platform/qcom/camss/camss-csiphy.h
@@ -45,6 +45,13 @@ struct csiphy_config {
struct csiphy_device;

struct csiphy_hw_ops {
+ /*
+ * csiphy_get_lane_mask - Calculate CSI2 lane mask configuration parameter
+ * @lane_cfg - CSI2 lane configuration
+ *
+ * Return lane mask
+ */
+ u8 (*get_lane_mask)(struct csiphy_lanes_cfg *lane_cfg);
void (*hw_version_read)(struct csiphy_device *csiphy,
struct device *dev);
void (*reset)(struct csiphy_device *csiphy);
--
2.32.0