CAL driver uses V4L2_CID_PIXEL_RATE to get the required pixel rate, and
then changes that value to link rate before configuring the registers.
Rewrite the code to use v4l2_get_link_freq(), which simplifies the code
as we get the link rate directly, and it also adds support for
V4L2_CID_LINK_FREQ.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
---
drivers/media/platform/ti-vpe/cal-camerarx.c | 52 +++++++-------------
1 file changed, 19 insertions(+), 33 deletions(-)
diff --git a/drivers/media/platform/ti-vpe/cal-camerarx.c b/drivers/media/platform/ti-vpe/cal-camerarx.c
index 988a01529dbc..9591a0c8a215 100644
--- a/drivers/media/platform/ti-vpe/cal-camerarx.c
+++ b/drivers/media/platform/ti-vpe/cal-camerarx.c
@@ -45,22 +45,23 @@ static inline void camerarx_write(struct cal_camerarx *phy, u32 offset, u32 val)
* ------------------------------------------------------------------
*/
-static s64 cal_camerarx_get_external_rate(struct cal_camerarx *phy)
+static s64 cal_camerarx_get_ext_link_freq(struct cal_camerarx *phy)
{
- struct v4l2_ctrl *ctrl;
- s64 rate;
+ struct v4l2_fwnode_bus_mipi_csi2 *mipi_csi2 = &phy->endpoint.bus.mipi_csi2;
+ u32 num_lanes = mipi_csi2->num_data_lanes;
+ u32 bpp = phy->fmtinfo->bpp;
+ s64 freq;
- ctrl = v4l2_ctrl_find(phy->source->ctrl_handler, V4L2_CID_PIXEL_RATE);
- if (!ctrl) {
- phy_err(phy, "no pixel rate control in subdev: %s\n",
+ freq = v4l2_get_link_freq(phy->source->ctrl_handler, bpp, 2 * num_lanes);
+ if (freq < 0) {
+ phy_err(phy, "failed to get link freq for subdev '%s'\n",
phy->source->name);
- return -EPIPE;
+ return freq;
}
- rate = v4l2_ctrl_g_ctrl_int64(ctrl);
- phy_dbg(3, phy, "Source Pixel Rate: %llu\n", rate);
+ phy_dbg(3, phy, "Source Link Freq: %llu\n", freq);
- return rate;
+ return freq;
}
static void cal_camerarx_lane_config(struct cal_camerarx *phy)
@@ -116,34 +117,19 @@ void cal_camerarx_disable(struct cal_camerarx *phy)
#define TCLK_MISS 1
#define TCLK_SETTLE 14
-static void cal_camerarx_config(struct cal_camerarx *phy, s64 external_rate)
+static void cal_camerarx_config(struct cal_camerarx *phy, s64 link_freq)
{
unsigned int reg0, reg1;
unsigned int ths_term, ths_settle;
- unsigned int csi2_ddrclk_khz;
- struct v4l2_fwnode_bus_mipi_csi2 *mipi_csi2 =
- &phy->endpoint.bus.mipi_csi2;
- u32 num_lanes = mipi_csi2->num_data_lanes;
/* DPHY timing configuration */
- /*
- * CSI-2 is DDR and we only count used lanes.
- *
- * csi2_ddrclk_khz = external_rate / 1000
- * / (2 * num_lanes) * phy->fmtinfo->bpp;
- */
- csi2_ddrclk_khz = div_s64(external_rate * phy->fmtinfo->bpp,
- 2 * num_lanes * 1000);
-
- phy_dbg(1, phy, "csi2_ddrclk_khz: %d\n", csi2_ddrclk_khz);
-
/* THS_TERM: Programmed value = floor(20 ns/DDRClk period) */
- ths_term = 20 * csi2_ddrclk_khz / 1000000;
+ ths_term = div_s64(20 * link_freq, 1000 * 1000 * 1000);
phy_dbg(1, phy, "ths_term: %d (0x%02x)\n", ths_term, ths_term);
/* THS_SETTLE: Programmed value = floor(105 ns/DDRClk period) + 4 */
- ths_settle = (105 * csi2_ddrclk_khz / 1000000) + 4;
+ ths_settle = div_s64(105 * link_freq, 1000 * 1000 * 1000) + 4;
phy_dbg(1, phy, "ths_settle: %d (0x%02x)\n", ths_settle, ths_settle);
reg0 = camerarx_read(phy, CAL_CSI2_PHY_REG0);
@@ -270,14 +256,14 @@ static void cal_camerarx_ppi_disable(struct cal_camerarx *phy)
static int cal_camerarx_start(struct cal_camerarx *phy)
{
- s64 external_rate;
+ s64 link_freq;
u32 sscounter;
u32 val;
int ret;
- external_rate = cal_camerarx_get_external_rate(phy);
- if (external_rate < 0)
- return external_rate;
+ link_freq = cal_camerarx_get_ext_link_freq(phy);
+ if (link_freq < 0)
+ return link_freq;
ret = v4l2_subdev_call(phy->source, core, s_power, 1);
if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) {
@@ -325,7 +311,7 @@ static int cal_camerarx_start(struct cal_camerarx *phy)
camerarx_read(phy, CAL_CSI2_PHY_REG0);
/* Program the PHY timing parameters. */
- cal_camerarx_config(phy, external_rate);
+ cal_camerarx_config(phy, link_freq);
/*
* b. Assert the FORCERXMODE signal.
--
2.25.1
