Add support for computing C10 HDMI PLLS using the HDMI PLL algorithm.
v2: Fix styling issues. (Jani)
v3: Rename function to align with filename. (Jani)
v4: Add Bspec reference. (Suraj)
Bspec: 74166
Signed-off-by: Ankit Nautiyal <ankit.k.nauti...@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kand...@intel.com>
---
.../drm/i915/display/intel_snps_hdmi_pll.c | 76 +++++++++++++++++++
.../drm/i915/display/intel_snps_hdmi_pll.h | 2 +
2 files changed, 78 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_snps_hdmi_pll.c
b/drivers/gpu/drm/i915/display/intel_snps_hdmi_pll.c
index 0e52578ef181..c6321dafef4f 100644
--- a/drivers/gpu/drm/i915/display/intel_snps_hdmi_pll.c
+++ b/drivers/gpu/drm/i915/display/intel_snps_hdmi_pll.c
@@ -5,6 +5,7 @@
#include <linux/math.h>
+#include "intel_cx0_phy_regs.h"
#include "intel_display_types.h"
#include "intel_snps_phy.h"
#include "intel_snps_phy_regs.h"
@@ -286,3 +287,78 @@ void intel_snps_hdmi_pll_compute_mpllb(struct
intel_mpllb_state *pll_state, u64
pll_state->mpllb_sscen =
REG_FIELD_PREP(SNPS_PHY_MPLLB_SSC_UP_SPREAD,
pll_params.ssc_up_spread);
}
+
+void intel_snps_hdmi_pll_compute_c10pll(struct intel_c10pll_state *pll_state,
u64 pixel_clock)
+{
+ /* x axis frequencies. One curve in each array per v2i point */
+ static const u64 c10_curve_freq_hz[2][8] = {
+ { 2500000000ULL, 3000000000ULL, 3000000000ULL, 3500000000ULL,
3500000000ULL,
+ 4000000000ULL, 4000000000ULL, 5000000000ULL },
+ { 4000000000ULL, 4600000000ULL, 4601000000ULL, 5400000000ULL,
5401000000ULL,
+ 6600000000ULL, 6601000000ULL, 8001000000ULL }
+ };
+
+ /* y axis heights multiplied with 1000000000 */
+ static const u64 c10_curve_0[2][8] = {
+ { 41174500, 48605500, 42973700, 49433100, 42408600, 47681900,
40297400, 49131400 },
+ { 82056800, 94420700, 82323400, 96370600, 81273300, 98630100,
81728700, 99105700}
+ };
+
+ static const u64 c10_curve_1[2][8] = {
+ { 73300000000000ULL, 66000000000000ULL, 83100000000000ULL,
75300000000000ULL,
+ 99700000000000ULL, 92300000000000ULL, 125000000000000ULL,
110000000000000ULL },
+ { 53700000000000ULL, 47700000000000ULL, 62200000000000ULL,
54400000000000ULL,
+ 75100000000000ULL, 63400000000000ULL, 90600000000000ULL,
76300000000000ULL }
+ };
+
+ /* Multiplied with 1000000000000 */
+ static const u64 c10_curve_2[2][8] = {
+ { 2415790000ULL, 3136460000ULL, 2581990000ULL, 3222670000ULL,
2529330000ULL,
+ 3042020000ULL, 2336970000ULL, 3191460000ULL},
+ { 4808390000ULL, 5994250000ULL, 4832730000ULL, 6193730000ULL,
4737700000ULL,
+ 6428750000ULL, 4779200000ULL, 6479340000ULL }
+ };
+
+ struct pll_output_params pll_params;
+ u32 refclk = 38400000;
+ u32 prescaler_divider = 0;
+ u32 ref_range = 1;
+ u32 ana_cp_int_gs = 30;
+ u32 ana_cp_prop_gs = 28;
+
+ compute_hdmi_tmds_pll(pixel_clock, refclk, ref_range,
+ ana_cp_int_gs, ana_cp_prop_gs,
+ c10_curve_freq_hz, c10_curve_0,
+ c10_curve_1, c10_curve_2, prescaler_divider,
+ &pll_params);
+
+ pll_state->tx = 0x10;
+ pll_state->cmn = 0x1;
+ pll_state->pll[0] = REG_FIELD_PREP(C10_PLL0_DIV5CLK_EN,
pll_params.mpll_div5_en) |
+ REG_FIELD_PREP(C10_PLL0_FRACEN,
pll_params.fracn_en) |
+ REG_FIELD_PREP(C10_PLL0_PMIX_EN,
pll_params.pmix_en) |
+ REG_FIELD_PREP(C10_PLL0_ANA_FREQ_VCO_MASK,
pll_params.ana_freq_vco);
+ pll_state->pll[2] = REG_FIELD_PREP(C10_PLL2_MULTIPLIERL_MASK,
pll_params.multiplier);
+ pll_state->pll[3] = REG_FIELD_PREP(C10_PLL3_MULTIPLIERH_MASK,
pll_params.multiplier >> 8);
+ pll_state->pll[8] = REG_FIELD_PREP(C10_PLL8_SSC_UP_SPREAD,
pll_params.ssc_up_spread);
+ pll_state->pll[9] = REG_FIELD_PREP(C10_PLL9_FRACN_DENL_MASK,
pll_params.fracn_den);
+ pll_state->pll[10] = REG_FIELD_PREP(C10_PLL10_FRACN_DENH_MASK,
pll_params.fracn_den >> 8);
+ pll_state->pll[11] = REG_FIELD_PREP(C10_PLL11_FRACN_QUOT_L_MASK,
pll_params.fracn_quot);
+ pll_state->pll[12] = REG_FIELD_PREP(C10_PLL12_FRACN_QUOT_H_MASK,
+ pll_params.fracn_quot >> 8);
+
+ pll_state->pll[13] = REG_FIELD_PREP(C10_PLL13_FRACN_REM_L_MASK,
pll_params.fracn_rem);
+ pll_state->pll[14] = REG_FIELD_PREP(C10_PLL14_FRACN_REM_H_MASK,
pll_params.fracn_rem >> 8);
+ pll_state->pll[15] = REG_FIELD_PREP(C10_PLL15_TXCLKDIV_MASK,
pll_params.tx_clk_div) |
+ REG_FIELD_PREP(C10_PLL15_HDMIDIV_MASK,
pll_params.hdmi_div);
+ pll_state->pll[16] = REG_FIELD_PREP(C10_PLL16_ANA_CPINT,
pll_params.ana_cp_int) |
+ REG_FIELD_PREP(C10_PLL16_ANA_CPINTGS_L,
ana_cp_int_gs);
+ pll_state->pll[17] = REG_FIELD_PREP(C10_PLL17_ANA_CPINTGS_H_MASK,
ana_cp_int_gs >> 1) |
+ REG_FIELD_PREP(C10_PLL17_ANA_CPPROP_L_MASK,
pll_params.ana_cp_prop);
+ pll_state->pll[18] =
+ REG_FIELD_PREP(C10_PLL18_ANA_CPPROP_H_MASK,
pll_params.ana_cp_prop >> 2) |
+ REG_FIELD_PREP(C10_PLL18_ANA_CPPROPGS_L_MASK,
ana_cp_prop_gs);
+
+ pll_state->pll[19] = REG_FIELD_PREP(C10_PLL19_ANA_CPPROPGS_H_MASK,
ana_cp_prop_gs >> 3) |
+ REG_FIELD_PREP(C10_PLL19_ANA_V2I_MASK,
pll_params.mpll_ana_v2i);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_snps_hdmi_pll.h
b/drivers/gpu/drm/i915/display/intel_snps_hdmi_pll.h
index 70b7023c1135..aac70c4bb0f8 100644
--- a/drivers/gpu/drm/i915/display/intel_snps_hdmi_pll.h
+++ b/drivers/gpu/drm/i915/display/intel_snps_hdmi_pll.h
@@ -8,8 +8,10 @@
#include <linux/types.h>
+struct intel_c10pll_state;
struct intel_mpllb_state;
void intel_snps_hdmi_pll_compute_mpllb(struct intel_mpllb_state *pll_state,
u64 pixel_clock);
+void intel_snps_hdmi_pll_compute_c10pll(struct intel_c10pll_state *pll_state,
u64 pixel_clock);
#endif /* __INTEL_SNPS_HDMI_PLL_H__ */
--
2.45.2
