diff options
| author | Vandita Kulkarni <vandita.kulkarni@intel.com> | 2022-05-25 13:34:01 +0530 |
|---|---|---|
| committer | Matt Roper <matthew.d.roper@intel.com> | 2022-05-25 07:46:12 -0700 |
| commit | edd34368c4c3b45b1386b15f78b2229420f8c6d4 (patch) | |
| tree | 208a09fe9e2354b67ff0202cab5969f2c3fba4e6 | |
| parent | 8ae664907916eba9a9d56296bed684c27318a872 (diff) | |
| download | linux-edd34368c4c3b45b1386b15f78b2229420f8c6d4.tar.bz2 | |
drm/i915/dg2: Support 4k@30 on HDMI
This patch adds a fix to support 297MHz of dot clock by calculating
the pll values using synopsis algorithm.
This will help to support 4k@30 mode for HDMI monitors on DG2.
v2: As per the algorithm, set MPLLB VCO range control bits to 3,
in register SNPS_PHY_MPLLB_DIV for 297Mhz. (Matt)
v3: Fix typo. (Ankit)
Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220525080401.1253511-1-ankit.k.nautiyal@intel.com
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_snps_phy.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_snps_phy.c b/drivers/gpu/drm/i915/display/intel_snps_phy.c index 0dd4775e8195..cc1270978b67 100644 --- a/drivers/gpu/drm/i915/display/intel_snps_phy.c +++ b/drivers/gpu/drm/i915/display/intel_snps_phy.c @@ -517,6 +517,37 @@ static const struct intel_mpllb_state dg2_hdmi_148_5 = { REG_FIELD_PREP(SNPS_PHY_MPLLB_SSC_UP_SPREAD, 1), }; +/* values in the below table are calculted using the algo */ +static const struct intel_mpllb_state dg2_hdmi_297 = { + .clock = 297000, + .ref_control = + REG_FIELD_PREP(SNPS_PHY_REF_CONTROL_REF_RANGE, 3), + .mpllb_cp = + REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT, 6) | + REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP, 14) | + REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT_GS, 64) | + REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP_GS, 124), + .mpllb_div = + REG_FIELD_PREP(SNPS_PHY_MPLLB_DIV5_CLK_EN, 1) | + REG_FIELD_PREP(SNPS_PHY_MPLLB_TX_CLK_DIV, 1) | + REG_FIELD_PREP(SNPS_PHY_MPLLB_PMIX_EN, 1) | + REG_FIELD_PREP(SNPS_PHY_MPLLB_V2I, 2) | + REG_FIELD_PREP(SNPS_PHY_MPLLB_FREQ_VCO, 3), + .mpllb_div2 = + REG_FIELD_PREP(SNPS_PHY_MPLLB_REF_CLK_DIV, 1) | + REG_FIELD_PREP(SNPS_PHY_MPLLB_MULTIPLIER, 86) | + REG_FIELD_PREP(SNPS_PHY_MPLLB_HDMI_DIV, 1), + .mpllb_fracn1 = + REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_CGG_UPDATE_EN, 1) | + REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_EN, 1) | + REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_DEN, 65535), + .mpllb_fracn2 = + REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_QUOT, 26214) | + REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_REM, 26214), + .mpllb_sscen = + REG_FIELD_PREP(SNPS_PHY_MPLLB_SSC_UP_SPREAD, 1), +}; + static const struct intel_mpllb_state dg2_hdmi_594 = { .clock = 594000, .ref_control = @@ -551,6 +582,7 @@ static const struct intel_mpllb_state * const dg2_hdmi_tables[] = { &dg2_hdmi_27_0, &dg2_hdmi_74_25, &dg2_hdmi_148_5, + &dg2_hdmi_297, &dg2_hdmi_594, NULL, }; |