The hs_rate and lp_rate may be used by the dsi host for timing
calculations. The tc358775 has a maximum bit rate of 1 Gbps/lane,
tc358765 has maximurate of 800 Mbps per lane.
Reviewed-by: Michael Walle <mwalle@xxxxxxxxxx>
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
---
drivers/gpu/drm/bridge/tc358775.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/gpu/drm/bridge/tc358775.c b/drivers/gpu/drm/bridge/tc358775.c
--- a/drivers/gpu/drm/bridge/tc358775.c
+++ b/drivers/gpu/drm/bridge/tc358775.c
@@ -637,6 +637,19 @@ static int tc_attach_host(struct tc_data *tc)
dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
MIPI_DSI_MODE_LPM;
+ /*
+ * The hs_rate and lp_rate are data rate values. The HS mode is
+ * differential, while the LP mode is single ended. As the HS mode
+ * uses DDR, the DSI clock frequency is half the hs_rate. The 10 Mbs
+ * data rate for LP mode is not specified in the bridge data sheet,
+ * but seems to be part of the MIPI DSI spec.
+ */
+ if (tc->type == TC358765)
+ dsi->hs_rate = 800000000;
+ else
+ dsi->hs_rate = 1000000000;
+ dsi->lp_rate = 10000000;
+
ret = devm_mipi_dsi_attach(dev, dsi);
if (ret < 0) {
dev_err(dev, "failed to attach dsi to host\n");
--
2.43.1
