diff options
| author | Harikrishna Shenoy <h-shenoy@ti.com> | 2025-08-07 10:50:02 +0530 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2025-09-10 21:22:22 +0530 |
| commit | 43bd2c44515f8ee5c019ce6e6583f5640387a41b (patch) | |
| tree | b9d6e704904933c20e45b580661acdc29b0064ec | |
| parent | e4a8db93b5ec9bca1cc66b295544899e3afd5e86 (diff) | |
phy: cadence: cdns-dphy: Enable lower resolutions in dphy
Enable support for data lane rates between 80-160 Mbps cdns dphy
as mentioned in TRM [0] by setting the pll_opdiv field to 16.
This change enables lower resolutions like 640x480 at 60Hz.
[0]: https://www.ti.com/lit/zip/spruil1
(Table 12-552. DPHY_TX_PLL_CTRL Register Field Descriptions)
Reviewed-by: Udit Kumar <u-kumar1@ti.com>
Reviewed-by: Devarsh Thakkar <devarsht@ti.com>
Signed-off-by: Harikrishna Shenoy <h-shenoy@ti.com>
Link: https://lore.kernel.org/r/20250807052002.717807-1-h-shenoy@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
| -rw-r--r-- | drivers/phy/cadence/cdns-dphy.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/phy/cadence/cdns-dphy.c b/drivers/phy/cadence/cdns-dphy.c index 24a25606996c..d5b0e516b93c 100644 --- a/drivers/phy/cadence/cdns-dphy.c +++ b/drivers/phy/cadence/cdns-dphy.c @@ -136,7 +136,7 @@ static int cdns_dphy_get_pll_cfg(struct cdns_dphy *dphy, dlane_bps = opts->hs_clk_rate; - if (dlane_bps > 2500000000UL || dlane_bps < 160000000UL) + if (dlane_bps > 2500000000UL || dlane_bps < 80000000UL) return -EINVAL; else if (dlane_bps >= 1250000000) cfg->pll_opdiv = 1; @@ -146,6 +146,8 @@ static int cdns_dphy_get_pll_cfg(struct cdns_dphy *dphy, cfg->pll_opdiv = 4; else if (dlane_bps >= 160000000) cfg->pll_opdiv = 8; + else if (dlane_bps >= 80000000) + cfg->pll_opdiv = 16; cfg->pll_fbdiv = DIV_ROUND_UP_ULL(dlane_bps * 2 * cfg->pll_opdiv * cfg->pll_ipdiv, |