| /* Copyright (c) 2012-2014, The Linux Foundation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 and |
| * only version 2 as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #define pr_fmt(fmt) "%s: " fmt, __func__ |
| |
| #include <linux/kernel.h> |
| #include <linux/err.h> |
| #include <linux/iopoll.h> |
| #include <linux/delay.h> |
| #include <linux/clk/msm-clock-generic.h> |
| |
| #include "mdss-pll.h" |
| #include "mdss-dsi-pll.h" |
| |
| #define DSI_PHY_PLL_UNIPHY_PLL_REFCLK_CFG (0x0) |
| #define DSI_PHY_PLL_UNIPHY_PLL_POSTDIV1_CFG (0x0004) |
| #define DSI_PHY_PLL_UNIPHY_PLL_CHGPUMP_CFG (0x0008) |
| #define DSI_PHY_PLL_UNIPHY_PLL_VCOLPF_CFG (0x000C) |
| #define DSI_PHY_PLL_UNIPHY_PLL_VREG_CFG (0x0010) |
| #define DSI_PHY_PLL_UNIPHY_PLL_PWRGEN_CFG (0x0014) |
| #define DSI_PHY_PLL_UNIPHY_PLL_POSTDIV2_CFG (0x0024) |
| #define DSI_PHY_PLL_UNIPHY_PLL_POSTDIV3_CFG (0x0028) |
| #define DSI_PHY_PLL_UNIPHY_PLL_LPFR_CFG (0x002C) |
| #define DSI_PHY_PLL_UNIPHY_PLL_LPFC1_CFG (0x0030) |
| #define DSI_PHY_PLL_UNIPHY_PLL_LPFC2_CFG (0x0034) |
| #define DSI_PHY_PLL_UNIPHY_PLL_SDM_CFG0 (0x0038) |
| #define DSI_PHY_PLL_UNIPHY_PLL_SDM_CFG1 (0x003C) |
| #define DSI_PHY_PLL_UNIPHY_PLL_SDM_CFG2 (0x0040) |
| #define DSI_PHY_PLL_UNIPHY_PLL_SDM_CFG3 (0x0044) |
| #define DSI_PHY_PLL_UNIPHY_PLL_SDM_CFG4 (0x0048) |
| #define DSI_PHY_PLL_UNIPHY_PLL_CAL_CFG0 (0x006C) |
| #define DSI_PHY_PLL_UNIPHY_PLL_CAL_CFG2 (0x0074) |
| #define DSI_PHY_PLL_UNIPHY_PLL_CAL_CFG3 (0x0078) |
| #define DSI_PHY_PLL_UNIPHY_PLL_CAL_CFG4 (0x007C) |
| #define DSI_PHY_PLL_UNIPHY_PLL_CAL_CFG5 (0x0080) |
| #define DSI_PHY_PLL_UNIPHY_PLL_CAL_CFG6 (0x0084) |
| #define DSI_PHY_PLL_UNIPHY_PLL_CAL_CFG7 (0x0088) |
| #define DSI_PHY_PLL_UNIPHY_PLL_CAL_CFG8 (0x008C) |
| #define DSI_PHY_PLL_UNIPHY_PLL_CAL_CFG9 (0x0090) |
| #define DSI_PHY_PLL_UNIPHY_PLL_CAL_CFG10 (0x0094) |
| #define DSI_PHY_PLL_UNIPHY_PLL_CAL_CFG11 (0x0098) |
| #define DSI_PHY_PLL_UNIPHY_PLL_EFUSE_CFG (0x009C) |
| #define DSI_PHY_PLL_UNIPHY_PLL_STATUS (0x00C0) |
| |
| #define DSI_PLL_POLL_MAX_READS 10 |
| #define DSI_PLL_POLL_TIMEOUT_US 50 |
| |
| int set_byte_mux_sel(struct mux_clk *clk, int sel) |
| { |
| struct mdss_pll_resources *dsi_pll_res = clk->priv; |
| |
| pr_debug("byte mux set to %s mode\n", sel ? "indirect" : "direct"); |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_VREG_CFG, (sel << 1)); |
| |
| return 0; |
| } |
| |
| int get_byte_mux_sel(struct mux_clk *clk) |
| { |
| int mux_mode, rc; |
| struct mdss_pll_resources *dsi_pll_res = clk->priv; |
| |
| if (is_gdsc_disabled(dsi_pll_res)) |
| return 0; |
| |
| rc = mdss_pll_resource_enable(dsi_pll_res, true); |
| if (rc) { |
| pr_err("Failed to enable mdss dsi pll resources\n"); |
| return rc; |
| } |
| |
| mux_mode = MDSS_PLL_REG_R(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_VREG_CFG) & BIT(1); |
| |
| pr_debug("byte mux mode = %s", mux_mode ? "indirect" : "direct"); |
| mdss_pll_resource_enable(dsi_pll_res, false); |
| |
| return !!mux_mode; |
| } |
| |
| int dsi_pll_div_prepare(struct clk *c) |
| { |
| struct div_clk *div = to_div_clk(c); |
| /* Restore the divider's value */ |
| return div->ops->set_div(div, div->data.div); |
| } |
| |
| int dsi_pll_mux_prepare(struct clk *c) |
| { |
| struct mux_clk *mux = to_mux_clk(c); |
| int i, rc, sel = 0; |
| struct mdss_pll_resources *dsi_pll_res = mux->priv; |
| |
| rc = mdss_pll_resource_enable(dsi_pll_res, true); |
| if (rc) { |
| pr_err("Failed to enable mdss dsi pll resources\n"); |
| return rc; |
| } |
| |
| for (i = 0; i < mux->num_parents; i++) |
| if (mux->parents[i].src == c->parent) { |
| sel = mux->parents[i].sel; |
| break; |
| } |
| |
| if (i == mux->num_parents) { |
| pr_err("Failed to select the parent clock\n"); |
| rc = -EINVAL; |
| goto error; |
| } |
| |
| /* Restore the mux source select value */ |
| rc = mux->ops->set_mux_sel(mux, sel); |
| |
| error: |
| mdss_pll_resource_enable(dsi_pll_res, false); |
| return rc; |
| } |
| |
| int fixed_4div_set_div(struct div_clk *clk, int div) |
| { |
| int rc; |
| struct mdss_pll_resources *dsi_pll_res = clk->priv; |
| |
| rc = mdss_pll_resource_enable(dsi_pll_res, true); |
| if (rc) { |
| pr_err("Failed to enable mdss dsi pll resources\n"); |
| return rc; |
| } |
| |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_POSTDIV2_CFG, (div - 1)); |
| |
| mdss_pll_resource_enable(dsi_pll_res, false); |
| return rc; |
| } |
| |
| int fixed_4div_get_div(struct div_clk *clk) |
| { |
| int div = 0, rc; |
| struct mdss_pll_resources *dsi_pll_res = clk->priv; |
| |
| if (is_gdsc_disabled(dsi_pll_res)) |
| return 0; |
| |
| rc = mdss_pll_resource_enable(dsi_pll_res, true); |
| if (rc) { |
| pr_err("Failed to enable mdss dsi pll resources\n"); |
| return rc; |
| } |
| |
| div = MDSS_PLL_REG_R(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_POSTDIV2_CFG); |
| |
| mdss_pll_resource_enable(dsi_pll_res, false); |
| return div + 1; |
| } |
| |
| int digital_set_div(struct div_clk *clk, int div) |
| { |
| int rc; |
| struct mdss_pll_resources *dsi_pll_res = clk->priv; |
| |
| rc = mdss_pll_resource_enable(dsi_pll_res, true); |
| if (rc) { |
| pr_err("Failed to enable mdss dsi pll resources\n"); |
| return rc; |
| } |
| |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_POSTDIV3_CFG, (div - 1)); |
| |
| mdss_pll_resource_enable(dsi_pll_res, false); |
| return rc; |
| } |
| |
| int digital_get_div(struct div_clk *clk) |
| { |
| int div = 0, rc; |
| struct mdss_pll_resources *dsi_pll_res = clk->priv; |
| |
| if (is_gdsc_disabled(dsi_pll_res)) |
| return 0; |
| |
| rc = mdss_pll_resource_enable(dsi_pll_res, true); |
| if (rc) { |
| pr_err("Failed to enable mdss dsi pll resources\n"); |
| return rc; |
| } |
| |
| div = MDSS_PLL_REG_R(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_POSTDIV3_CFG); |
| |
| mdss_pll_resource_enable(dsi_pll_res, false); |
| return div + 1; |
| } |
| |
| int analog_set_div(struct div_clk *clk, int div) |
| { |
| int rc; |
| struct mdss_pll_resources *dsi_pll_res = clk->priv; |
| |
| rc = mdss_pll_resource_enable(dsi_pll_res, true); |
| if (rc) { |
| pr_err("Failed to enable mdss dsi pll resources\n"); |
| return rc; |
| } |
| |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_POSTDIV1_CFG, div - 1); |
| |
| mdss_pll_resource_enable(dsi_pll_res, false); |
| return rc; |
| } |
| |
| int analog_get_div(struct div_clk *clk) |
| { |
| int div = 0, rc; |
| struct mdss_pll_resources *dsi_pll_res = clk->priv; |
| |
| if (is_gdsc_disabled(dsi_pll_res)) |
| return 0; |
| |
| rc = mdss_pll_resource_enable(clk->priv, true); |
| if (rc) { |
| pr_err("Failed to enable mdss dsi pll resources\n"); |
| return rc; |
| } |
| |
| div = MDSS_PLL_REG_R(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_POSTDIV1_CFG) + 1; |
| |
| mdss_pll_resource_enable(dsi_pll_res, false); |
| |
| return div; |
| } |
| |
| int dsi_pll_lock_status(struct mdss_pll_resources *dsi_pll_res) |
| { |
| u32 status; |
| int pll_locked; |
| |
| /* poll for PLL ready status */ |
| if (readl_poll_timeout_atomic((dsi_pll_res->pll_base + |
| DSI_PHY_PLL_UNIPHY_PLL_STATUS), |
| status, |
| ((status & BIT(0)) == 1), |
| DSI_PLL_POLL_MAX_READS, |
| DSI_PLL_POLL_TIMEOUT_US)) { |
| pr_debug("DSI PLL status=%x failed to Lock\n", status); |
| pll_locked = 0; |
| } else { |
| pll_locked = 1; |
| } |
| |
| return pll_locked; |
| } |
| |
| int vco_set_rate(struct dsi_pll_vco_clk *vco, unsigned long rate) |
| { |
| s64 vco_clk_rate = rate; |
| s32 rem; |
| s64 refclk_cfg, frac_n_mode, ref_doubler_en_b; |
| s64 ref_clk_to_pll, div_fbx1000, frac_n_value; |
| s64 sdm_cfg0, sdm_cfg1, sdm_cfg2, sdm_cfg3; |
| s64 gen_vco_clk, cal_cfg10, cal_cfg11; |
| u32 res; |
| int i; |
| struct mdss_pll_resources *dsi_pll_res = vco->priv; |
| |
| /* Configure the Loop filter resistance */ |
| for (i = 0; i < vco->lpfr_lut_size; i++) |
| if (vco_clk_rate <= vco->lpfr_lut[i].vco_rate) |
| break; |
| if (i == vco->lpfr_lut_size) { |
| pr_err("unable to get loop filter resistance. vco=%ld\n", rate); |
| return -EINVAL; |
| } |
| res = vco->lpfr_lut[i].r; |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_LPFR_CFG, res); |
| |
| /* Loop filter capacitance values : c1 and c2 */ |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_LPFC1_CFG, 0x70); |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_LPFC2_CFG, 0x15); |
| |
| div_s64_rem(vco_clk_rate, vco->ref_clk_rate, &rem); |
| if (rem) { |
| refclk_cfg = 0x1; |
| frac_n_mode = 1; |
| ref_doubler_en_b = 0; |
| } else { |
| refclk_cfg = 0x0; |
| frac_n_mode = 0; |
| ref_doubler_en_b = 1; |
| } |
| |
| pr_debug("refclk_cfg = %lld\n", refclk_cfg); |
| |
| ref_clk_to_pll = ((vco->ref_clk_rate * 2 * (refclk_cfg)) |
| + (ref_doubler_en_b * vco->ref_clk_rate)); |
| div_fbx1000 = div_s64((vco_clk_rate * 1000), ref_clk_to_pll); |
| |
| div_s64_rem(div_fbx1000, 1000, &rem); |
| frac_n_value = div_s64((rem * (1 << 16)), 1000); |
| gen_vco_clk = div_s64(div_fbx1000 * ref_clk_to_pll, 1000); |
| |
| pr_debug("ref_clk_to_pll = %lld\n", ref_clk_to_pll); |
| pr_debug("div_fb = %lld\n", div_fbx1000); |
| pr_debug("frac_n_value = %lld\n", frac_n_value); |
| |
| pr_debug("Generated VCO Clock: %lld\n", gen_vco_clk); |
| rem = 0; |
| if (frac_n_mode) { |
| sdm_cfg0 = (0x0 << 5); |
| sdm_cfg0 |= (0x0 & 0x3f); |
| sdm_cfg1 = (div_s64(div_fbx1000, 1000) & 0x3f) - 1; |
| sdm_cfg3 = div_s64_rem(frac_n_value, 256, &rem); |
| sdm_cfg2 = rem; |
| } else { |
| sdm_cfg0 = (0x1 << 5); |
| sdm_cfg0 |= (div_s64(div_fbx1000, 1000) & 0x3f) - 1; |
| sdm_cfg1 = (0x0 & 0x3f); |
| sdm_cfg2 = 0; |
| sdm_cfg3 = 0; |
| } |
| |
| pr_debug("sdm_cfg0=%lld\n", sdm_cfg0); |
| pr_debug("sdm_cfg1=%lld\n", sdm_cfg1); |
| pr_debug("sdm_cfg2=%lld\n", sdm_cfg2); |
| pr_debug("sdm_cfg3=%lld\n", sdm_cfg3); |
| |
| cal_cfg11 = div_s64_rem(gen_vco_clk, 256 * 1000000, &rem); |
| cal_cfg10 = rem / 1000000; |
| pr_debug("cal_cfg10=%lld, cal_cfg11=%lld\n", cal_cfg10, cal_cfg11); |
| |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_CHGPUMP_CFG, 0x02); |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_CAL_CFG3, 0x2b); |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_CAL_CFG4, 0x66); |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_LKDET_CFG2, 0x0d); |
| |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_SDM_CFG1, (u32)(sdm_cfg1 & 0xff)); |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_SDM_CFG2, (u32)(sdm_cfg2 & 0xff)); |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_SDM_CFG3, (u32)(sdm_cfg3 & 0xff)); |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_SDM_CFG4, 0x00); |
| |
| /* Add hardware recommended delay for correct PLL configuration */ |
| if (dsi_pll_res->vco_delay) |
| udelay(dsi_pll_res->vco_delay); |
| |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_REFCLK_CFG, (u32)refclk_cfg); |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_PWRGEN_CFG, 0x00); |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_VCOLPF_CFG, 0x71); |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_SDM_CFG0, (u32)sdm_cfg0); |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_CAL_CFG0, 0x12); |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_CAL_CFG6, 0x30); |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_CAL_CFG7, 0x00); |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_CAL_CFG8, 0x60); |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_CAL_CFG9, 0x00); |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_CAL_CFG10, (u32)(cal_cfg10 & 0xff)); |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_CAL_CFG11, (u32)(cal_cfg11 & 0xff)); |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_EFUSE_CFG, 0x20); |
| |
| return 0; |
| } |
| |
| unsigned long vco_get_rate(struct clk *c) |
| { |
| u32 sdm0, doubler, sdm_byp_div; |
| u64 vco_rate; |
| u32 sdm_dc_off, sdm_freq_seed, sdm2, sdm3; |
| struct dsi_pll_vco_clk *vco = to_vco_clk(c); |
| u64 ref_clk = vco->ref_clk_rate; |
| int rc; |
| struct mdss_pll_resources *dsi_pll_res = vco->priv; |
| |
| if (is_gdsc_disabled(dsi_pll_res)) |
| return 0; |
| |
| rc = mdss_pll_resource_enable(dsi_pll_res, true); |
| if (rc) { |
| pr_err("Failed to enable mdss dsi pll resources\n"); |
| return rc; |
| } |
| |
| /* Check to see if the ref clk doubler is enabled */ |
| doubler = MDSS_PLL_REG_R(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_REFCLK_CFG) & BIT(0); |
| ref_clk += (doubler * vco->ref_clk_rate); |
| |
| /* see if it is integer mode or sdm mode */ |
| sdm0 = MDSS_PLL_REG_R(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_SDM_CFG0); |
| if (sdm0 & BIT(6)) { |
| /* integer mode */ |
| sdm_byp_div = (MDSS_PLL_REG_R(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_SDM_CFG0) & 0x3f) + 1; |
| vco_rate = ref_clk * sdm_byp_div; |
| } else { |
| /* sdm mode */ |
| sdm_dc_off = MDSS_PLL_REG_R(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_SDM_CFG1) & 0xFF; |
| pr_debug("sdm_dc_off = %d\n", sdm_dc_off); |
| sdm2 = MDSS_PLL_REG_R(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_SDM_CFG2) & 0xFF; |
| sdm3 = MDSS_PLL_REG_R(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_SDM_CFG3) & 0xFF; |
| sdm_freq_seed = (sdm3 << 8) | sdm2; |
| pr_debug("sdm_freq_seed = %d\n", sdm_freq_seed); |
| |
| vco_rate = (ref_clk * (sdm_dc_off + 1)) + |
| mult_frac(ref_clk, sdm_freq_seed, BIT(16)); |
| pr_debug("vco rate = %lld", vco_rate); |
| } |
| |
| pr_debug("returning vco rate = %lu\n", (unsigned long)vco_rate); |
| |
| mdss_pll_resource_enable(dsi_pll_res, false); |
| |
| return (unsigned long)vco_rate; |
| } |
| |
| static int dsi_pll_enable(struct clk *c) |
| { |
| int i, rc; |
| struct dsi_pll_vco_clk *vco = to_vco_clk(c); |
| struct mdss_pll_resources *dsi_pll_res = vco->priv; |
| |
| rc = mdss_pll_resource_enable(dsi_pll_res, true); |
| if (rc) { |
| pr_err("Failed to enable mdss dsi pll resources\n"); |
| return rc; |
| } |
| |
| /* Try all enable sequences until one succeeds */ |
| for (i = 0; i < vco->pll_en_seq_cnt; i++) { |
| rc = vco->pll_enable_seqs[i](dsi_pll_res); |
| pr_debug("DSI PLL %s after sequence #%d\n", |
| rc ? "unlocked" : "locked", i + 1); |
| if (!rc) |
| break; |
| } |
| |
| if (rc) { |
| mdss_pll_resource_enable(dsi_pll_res, false); |
| pr_err("DSI PLL failed to lock\n"); |
| } |
| dsi_pll_res->pll_on = true; |
| |
| return rc; |
| } |
| |
| static void dsi_pll_disable(struct clk *c) |
| { |
| struct dsi_pll_vco_clk *vco = to_vco_clk(c); |
| struct mdss_pll_resources *dsi_pll_res = vco->priv; |
| |
| if (!dsi_pll_res->pll_on && |
| mdss_pll_resource_enable(dsi_pll_res, true)) { |
| pr_err("Failed to enable mdss dsi pll resources\n"); |
| return; |
| } |
| |
| dsi_pll_res->handoff_resources = false; |
| |
| MDSS_PLL_REG_W(dsi_pll_res->pll_base, |
| DSI_PHY_PLL_UNIPHY_PLL_GLB_CFG, 0x00); |
| |
| mdss_pll_resource_enable(dsi_pll_res, false); |
| dsi_pll_res->pll_on = false; |
| |
| pr_debug("DSI PLL Disabled\n"); |
| } |
| |
| long vco_round_rate(struct clk *c, unsigned long rate) |
| { |
| unsigned long rrate = rate; |
| struct dsi_pll_vco_clk *vco = to_vco_clk(c); |
| |
| if (rate < vco->min_rate) |
| rrate = vco->min_rate; |
| if (rate > vco->max_rate) |
| rrate = vco->max_rate; |
| |
| return rrate; |
| } |
| |
| enum handoff vco_handoff(struct clk *c) |
| { |
| int rc; |
| enum handoff ret = HANDOFF_DISABLED_CLK; |
| struct dsi_pll_vco_clk *vco = to_vco_clk(c); |
| struct mdss_pll_resources *dsi_pll_res = vco->priv; |
| |
| if (is_gdsc_disabled(dsi_pll_res)) |
| return HANDOFF_DISABLED_CLK; |
| |
| rc = mdss_pll_resource_enable(dsi_pll_res, true); |
| if (rc) { |
| pr_err("Failed to enable mdss dsi pll resources\n"); |
| return ret; |
| } |
| |
| if (dsi_pll_lock_status(dsi_pll_res)) { |
| dsi_pll_res->handoff_resources = true; |
| dsi_pll_res->pll_on = true; |
| c->rate = vco_get_rate(c); |
| ret = HANDOFF_ENABLED_CLK; |
| } else { |
| mdss_pll_resource_enable(dsi_pll_res, false); |
| } |
| |
| return ret; |
| } |
| |
| int vco_prepare(struct clk *c) |
| { |
| int rc = 0; |
| struct dsi_pll_vco_clk *vco = to_vco_clk(c); |
| struct mdss_pll_resources *dsi_pll_res = vco->priv; |
| |
| if (!dsi_pll_res) { |
| pr_err("Dsi pll resources are not available\n"); |
| return -EINVAL; |
| } |
| |
| if ((dsi_pll_res->vco_cached_rate != 0) |
| && (dsi_pll_res->vco_cached_rate == c->rate)) { |
| rc = c->ops->set_rate(c, dsi_pll_res->vco_cached_rate); |
| if (rc) { |
| pr_err("vco_set_rate failed. rc=%d\n", rc); |
| goto error; |
| } |
| } |
| |
| rc = dsi_pll_enable(c); |
| |
| error: |
| return rc; |
| } |
| |
| void vco_unprepare(struct clk *c) |
| { |
| struct dsi_pll_vco_clk *vco = to_vco_clk(c); |
| struct mdss_pll_resources *dsi_pll_res = vco->priv; |
| |
| if (!dsi_pll_res) { |
| pr_err("Dsi pll resources are not available\n"); |
| return; |
| } |
| |
| dsi_pll_res->vco_cached_rate = c->rate; |
| dsi_pll_disable(c); |
| } |
| |