/*
 * Copyright © 2013 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 * Authors:
 *      Shobhit Kumar <shobhit.kumar@intel.com>
 *      Yogesh Mohan Marimuthu <yogesh.mohan.marimuthu@intel.com>
 */

#include <linux/iopoll.h>
#include <linux/kernel.h>
#include <linux/string_helpers.h>

#include <drm/drm_print.h>

#include "intel_de.h"
#include "intel_display_types.h"
#include "intel_dsi.h"
#include "vlv_dsi_pll.h"
#include "vlv_dsi_pll_regs.h"
#include "vlv_sideband.h"

static const u16 lfsr_converts[] = {
        426, 469, 234, 373, 442, 221, 110, 311, 411,            /* 62 - 70 */
        461, 486, 243, 377, 188, 350, 175, 343, 427, 213,       /* 71 - 80 */
        106, 53, 282, 397, 454, 227, 113, 56, 284, 142,         /* 81 - 90 */
        71, 35, 273, 136, 324, 418, 465, 488, 500, 506          /* 91 - 100 */
};

/* Get DSI clock from pixel clock */
static u32 dsi_clk_from_pclk(u32 pclk, enum mipi_dsi_pixel_format fmt,
                             int lane_count)
{
        u32 dsi_clk_khz;
        u32 bpp = mipi_dsi_pixel_format_to_bpp(fmt);

        /* DSI data rate = pixel clock * bits per pixel / lane count
           pixel clock is converted from KHz to Hz */
        dsi_clk_khz = DIV_ROUND_CLOSEST(pclk * bpp, lane_count);

        return dsi_clk_khz;
}

static int dsi_calc_mnp(struct intel_display *display,
                        struct intel_crtc_state *config,
                        int target_dsi_clk)
{
        unsigned int m_min, m_max, p_min = 2, p_max = 6;
        unsigned int m, n, p;
        unsigned int calc_m, calc_p;
        int delta, ref_clk;

        /* target_dsi_clk is expected in kHz */
        if (target_dsi_clk < 300000 || target_dsi_clk > 1150000) {
                drm_err(display->drm, "DSI CLK Out of Range\n");
                return -ECHRNG;
        }

        if (display->platform.cherryview) {
                ref_clk = 100000;
                n = 4;
                m_min = 70;
                m_max = 96;
        } else {
                ref_clk = 25000;
                n = 1;
                m_min = 62;
                m_max = 92;
        }

        calc_p = p_min;
        calc_m = m_min;
        delta = abs(target_dsi_clk - (m_min * ref_clk) / (p_min * n));

        for (m = m_min; m <= m_max && delta; m++) {
                for (p = p_min; p <= p_max && delta; p++) {
                        /*
                         * Find the optimal m and p divisors with minimal delta
                         * +/- the required clock
                         */
                        int calc_dsi_clk = (m * ref_clk) / (p * n);
                        int d = abs(target_dsi_clk - calc_dsi_clk);
                        if (d < delta) {
                                delta = d;
                                calc_m = m;
                                calc_p = p;
                        }
                }
        }

        /* register has log2(N1), this works fine for powers of two */
        config->dsi_pll.ctrl = 1 << (DSI_PLL_P1_POST_DIV_SHIFT + calc_p - 2);
        config->dsi_pll.div =
                (ffs(n) - 1) << DSI_PLL_N1_DIV_SHIFT |
                (u32)lfsr_converts[calc_m - 62] << DSI_PLL_M1_DIV_SHIFT;

        return 0;
}

static int vlv_dsi_pclk(struct intel_encoder *encoder,
                        struct intel_crtc_state *config)
{
        struct intel_display *display = to_intel_display(encoder);
        struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
        int bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
        u32 dsi_clock;
        u32 pll_ctl, pll_div;
        u32 m = 0, p = 0, n;
        int refclk = display->platform.cherryview ? 100000 : 25000;
        int i;

        pll_ctl = config->dsi_pll.ctrl;
        pll_div = config->dsi_pll.div;

        /* mask out other bits and extract the P1 divisor */
        pll_ctl &= DSI_PLL_P1_POST_DIV_MASK;
        pll_ctl = pll_ctl >> (DSI_PLL_P1_POST_DIV_SHIFT - 2);

        /* N1 divisor */
        n = (pll_div & DSI_PLL_N1_DIV_MASK) >> DSI_PLL_N1_DIV_SHIFT;
        n = 1 << n; /* register has log2(N1) */

        /* mask out the other bits and extract the M1 divisor */
        pll_div &= DSI_PLL_M1_DIV_MASK;
        pll_div = pll_div >> DSI_PLL_M1_DIV_SHIFT;

        p = fls(pll_ctl);
        if (p)
                p--;

        if (!p) {
                drm_err(display->drm, "wrong P1 divisor\n");
                return 0;
        }

        for (i = 0; i < ARRAY_SIZE(lfsr_converts); i++) {
                if (lfsr_converts[i] == pll_div)
                        break;
        }

        if (i == ARRAY_SIZE(lfsr_converts)) {
                drm_err(display->drm, "wrong m_seed programmed\n");
                return 0;
        }

        m = i + 62;

        dsi_clock = (m * refclk) / (p * n);

        return DIV_ROUND_CLOSEST(dsi_clock * intel_dsi->lane_count, bpp);
}

/*
 * XXX: The muxing and gating is hard coded for now. Need to add support for
 * sharing PLLs with two DSI outputs.
 */
int vlv_dsi_pll_compute(struct intel_encoder *encoder,
                        struct intel_crtc_state *config)
{
        struct intel_display *display = to_intel_display(encoder);
        struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
        int pclk, dsi_clk, ret;

        dsi_clk = dsi_clk_from_pclk(intel_dsi->pclk, intel_dsi->pixel_format,
                                    intel_dsi->lane_count);

        ret = dsi_calc_mnp(display, config, dsi_clk);
        if (ret) {
                drm_dbg_kms(display->drm, "dsi_calc_mnp failed\n");
                return ret;
        }

        if (intel_dsi->ports & (1 << PORT_A))
                config->dsi_pll.ctrl |= DSI_PLL_CLK_GATE_DSI0_DSIPLL;

        if (intel_dsi->ports & (1 << PORT_C))
                config->dsi_pll.ctrl |= DSI_PLL_CLK_GATE_DSI1_DSIPLL;

        config->dsi_pll.ctrl |= DSI_PLL_VCO_EN;

        drm_dbg_kms(display->drm, "dsi pll div %08x, ctrl %08x\n",
                    config->dsi_pll.div, config->dsi_pll.ctrl);

        pclk = vlv_dsi_pclk(encoder, config);
        config->port_clock = pclk;

        /* FIXME definitely not right for burst/cmd mode/pixel overlap */
        config->hw.adjusted_mode.crtc_clock = pclk;
        if (intel_dsi->dual_link)
                config->hw.adjusted_mode.crtc_clock *= 2;

        return 0;
}

void vlv_dsi_pll_enable(struct intel_encoder *encoder,
                        const struct intel_crtc_state *config)
{
        struct intel_display *display = to_intel_display(encoder);
        u32 val;
        int ret;

        drm_dbg_kms(display->drm, "\n");

        vlv_cck_get(display->drm);

        vlv_cck_write(display->drm, CCK_REG_DSI_PLL_CONTROL, 0);
        vlv_cck_write(display->drm, CCK_REG_DSI_PLL_DIVIDER, config->dsi_pll.div);
        vlv_cck_write(display->drm, CCK_REG_DSI_PLL_CONTROL,
                      config->dsi_pll.ctrl & ~DSI_PLL_VCO_EN);

        /* wait at least 0.5 us after ungating before enabling VCO,
         * allow hrtimer subsystem optimization by relaxing timing
         */
        usleep_range(10, 50);

        vlv_cck_write(display->drm, CCK_REG_DSI_PLL_CONTROL, config->dsi_pll.ctrl);

        ret = poll_timeout_us(val = vlv_cck_read(display->drm, CCK_REG_DSI_PLL_CONTROL),
                              val & DSI_PLL_LOCK,
                              500, 20 * 1000, false);
        if (ret) {
                vlv_cck_put(display->drm);
                drm_err(display->drm, "DSI PLL lock failed\n");
                return;
        }
        vlv_cck_put(display->drm);

        drm_dbg_kms(display->drm, "DSI PLL locked\n");
}

void vlv_dsi_pll_disable(struct intel_encoder *encoder)
{
        struct intel_display *display = to_intel_display(encoder);
        u32 tmp;

        drm_dbg_kms(display->drm, "\n");

        vlv_cck_get(display->drm);

        tmp = vlv_cck_read(display->drm, CCK_REG_DSI_PLL_CONTROL);
        tmp &= ~DSI_PLL_VCO_EN;
        tmp |= DSI_PLL_LDO_GATE;
        vlv_cck_write(display->drm, CCK_REG_DSI_PLL_CONTROL, tmp);

        vlv_cck_put(display->drm);
}

static bool has_dsic_clock(struct intel_display *display)
{
        return display->platform.broxton;
}

bool bxt_dsi_pll_is_enabled(struct intel_display *display)
{
        bool enabled;
        u32 val;
        u32 mask;

        mask = BXT_DSI_PLL_DO_ENABLE | BXT_DSI_PLL_LOCKED;
        val = intel_de_read(display, BXT_DSI_PLL_ENABLE);
        enabled = (val & mask) == mask;

        if (!enabled)
                return false;

        /*
         * Dividers must be programmed with valid values. As per BSEPC, for
         * GEMINLAKE only PORT A divider values are checked while for BXT
         * both divider values are validated. Check this here for
         * paranoia, since BIOS is known to misconfigure PLLs in this way at
         * times, and since accessing DSI registers with invalid dividers
         * causes a system hang.
         */
        val = intel_de_read(display, BXT_DSI_PLL_CTL);
        if (!has_dsic_clock(display)) {
                if (!(val & BXT_DSIA_16X_MASK)) {
                        drm_dbg_kms(display->drm,
                                    "Invalid PLL divider (%08x)\n", val);
                        enabled = false;
                }
        } else {
                if (!(val & BXT_DSIA_16X_MASK) || !(val & BXT_DSIC_16X_MASK)) {
                        drm_dbg_kms(display->drm,
                                    "Invalid PLL divider (%08x)\n", val);
                        enabled = false;
                }
        }

        return enabled;
}

void bxt_dsi_pll_disable(struct intel_encoder *encoder)
{
        struct intel_display *display = to_intel_display(encoder);

        drm_dbg_kms(display->drm, "\n");

        intel_de_rmw(display, BXT_DSI_PLL_ENABLE, BXT_DSI_PLL_DO_ENABLE, 0);

        /*
         * PLL lock should deassert within 200us.
         * Wait up to 1ms before timing out.
         */
        if (intel_de_wait_for_clear_ms(display, BXT_DSI_PLL_ENABLE,
                                       BXT_DSI_PLL_LOCKED, 1))
                drm_err(display->drm,
                        "Timeout waiting for PLL lock deassertion\n");
}

u32 vlv_dsi_get_pclk(struct intel_encoder *encoder,
                     struct intel_crtc_state *config)
{
        struct intel_display *display = to_intel_display(encoder);
        u32 pll_ctl, pll_div;

        drm_dbg_kms(display->drm, "\n");

        vlv_cck_get(display->drm);
        pll_ctl = vlv_cck_read(display->drm, CCK_REG_DSI_PLL_CONTROL);
        pll_div = vlv_cck_read(display->drm, CCK_REG_DSI_PLL_DIVIDER);
        vlv_cck_put(display->drm);

        config->dsi_pll.ctrl = pll_ctl & ~DSI_PLL_LOCK;
        config->dsi_pll.div = pll_div;

        return vlv_dsi_pclk(encoder, config);
}

static int bxt_dsi_pclk(struct intel_encoder *encoder,
                        const struct intel_crtc_state *config)
{
        struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
        int bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
        u32 dsi_ratio, dsi_clk;

        dsi_ratio = config->dsi_pll.ctrl & BXT_DSI_PLL_RATIO_MASK;
        dsi_clk = (dsi_ratio * BXT_REF_CLOCK_KHZ) / 2;

        return DIV_ROUND_CLOSEST(dsi_clk * intel_dsi->lane_count, bpp);
}

u32 bxt_dsi_get_pclk(struct intel_encoder *encoder,
                     struct intel_crtc_state *config)
{
        struct intel_display *display = to_intel_display(encoder);
        u32 pclk;

        config->dsi_pll.ctrl = intel_de_read(display, BXT_DSI_PLL_CTL);
        if (!has_dsic_clock(display))
                config->dsi_pll.ctrl &= ~BXT_DSIC_16X_MASK;

        pclk = bxt_dsi_pclk(encoder, config);

        drm_dbg_kms(display->drm, "Calculated pclk=%u\n", pclk);
        return pclk;
}

void vlv_dsi_reset_clocks(struct intel_encoder *encoder, enum port port)
{
        struct intel_display *display = to_intel_display(encoder);
        struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
        u32 temp;

        temp = intel_de_read(display, MIPI_CTRL(display, port));
        temp &= ~ESCAPE_CLOCK_DIVIDER_MASK;
        intel_de_write(display, MIPI_CTRL(display, port),
                       temp | intel_dsi->escape_clk_div << ESCAPE_CLOCK_DIVIDER_SHIFT);
}

static void glk_dsi_program_esc_clock(struct intel_display *display,
                                      const struct intel_crtc_state *config)
{
        u32 dsi_rate = 0;
        u32 pll_ratio = 0;
        u32 ddr_clk = 0;
        u32 div1_value = 0;
        u32 div2_value = 0;
        u32 txesc1_div = 0;
        u32 txesc2_div = 0;

        pll_ratio = config->dsi_pll.ctrl & BXT_DSI_PLL_RATIO_MASK;

        dsi_rate = (BXT_REF_CLOCK_KHZ * pll_ratio) / 2;

        ddr_clk = dsi_rate / 2;

        /* Variable divider value */
        div1_value = DIV_ROUND_CLOSEST(ddr_clk, 20000);

        /* Calculate TXESC1 divider */
        if (div1_value <= 10)
                txesc1_div = div1_value;
        else if ((div1_value > 10) && (div1_value <= 20))
                txesc1_div = DIV_ROUND_UP(div1_value, 2);
        else if ((div1_value > 20) && (div1_value <= 30))
                txesc1_div = DIV_ROUND_UP(div1_value, 4);
        else if ((div1_value > 30) && (div1_value <= 40))
                txesc1_div = DIV_ROUND_UP(div1_value, 6);
        else if ((div1_value > 40) && (div1_value <= 50))
                txesc1_div = DIV_ROUND_UP(div1_value, 8);
        else
                txesc1_div = 10;

        /* Calculate TXESC2 divider */
        div2_value = DIV_ROUND_UP(div1_value, txesc1_div);

        txesc2_div = min_t(u32, div2_value, 10);

        intel_de_write(display, MIPIO_TXESC_CLK_DIV1,
                       (1 << (txesc1_div - 1)) & GLK_TX_ESC_CLK_DIV1_MASK);
        intel_de_write(display, MIPIO_TXESC_CLK_DIV2,
                       (1 << (txesc2_div - 1)) & GLK_TX_ESC_CLK_DIV2_MASK);
}

/* Program BXT Mipi clocks and dividers */
static void bxt_dsi_program_clocks(struct intel_display *display, enum port port,
                                   const struct intel_crtc_state *config)
{
        u32 tmp;
        u32 dsi_rate = 0;
        u32 pll_ratio = 0;
        u32 rx_div;
        u32 tx_div;
        u32 rx_div_upper;
        u32 rx_div_lower;
        u32 mipi_8by3_divider;

        /* Clear old configurations */
        tmp = intel_de_read(display, BXT_MIPI_CLOCK_CTL);
        tmp &= ~(BXT_MIPI_TX_ESCLK_FIXDIV_MASK(port));
        tmp &= ~(BXT_MIPI_RX_ESCLK_UPPER_FIXDIV_MASK(port));
        tmp &= ~(BXT_MIPI_8X_BY3_DIVIDER_MASK(port));
        tmp &= ~(BXT_MIPI_RX_ESCLK_LOWER_FIXDIV_MASK(port));

        /* Get the current DSI rate(actual) */
        pll_ratio = config->dsi_pll.ctrl & BXT_DSI_PLL_RATIO_MASK;
        dsi_rate = (BXT_REF_CLOCK_KHZ * pll_ratio) / 2;

        /*
         * tx clock should be <= 20MHz and the div value must be
         * subtracted by 1 as per bspec
         */
        tx_div = DIV_ROUND_UP(dsi_rate, 20000) - 1;
        /*
         * rx clock should be <= 150MHz and the div value must be
         * subtracted by 1 as per bspec
         */
        rx_div = DIV_ROUND_UP(dsi_rate, 150000) - 1;

        /*
         * rx divider value needs to be updated in the
         * two different bit fields in the register hence splitting the
         * rx divider value accordingly
         */
        rx_div_lower = rx_div & RX_DIVIDER_BIT_1_2;
        rx_div_upper = (rx_div & RX_DIVIDER_BIT_3_4) >> 2;

        mipi_8by3_divider = 0x2;

        tmp |= BXT_MIPI_8X_BY3_DIVIDER(port, mipi_8by3_divider);
        tmp |= BXT_MIPI_TX_ESCLK_DIVIDER(port, tx_div);
        tmp |= BXT_MIPI_RX_ESCLK_LOWER_DIVIDER(port, rx_div_lower);
        tmp |= BXT_MIPI_RX_ESCLK_UPPER_DIVIDER(port, rx_div_upper);

        intel_de_write(display, BXT_MIPI_CLOCK_CTL, tmp);
}

int bxt_dsi_pll_compute(struct intel_encoder *encoder,
                        struct intel_crtc_state *config)
{
        struct intel_display *display = to_intel_display(encoder);
        struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
        u8 dsi_ratio, dsi_ratio_min, dsi_ratio_max;
        u32 dsi_clk;
        int pclk;

        dsi_clk = dsi_clk_from_pclk(intel_dsi->pclk, intel_dsi->pixel_format,
                                    intel_dsi->lane_count);

        /*
         * From clock diagram, to get PLL ratio divider, divide double of DSI
         * link rate (i.e., 2*8x=16x frequency value) by ref clock. Make sure to
         * round 'up' the result
         */
        dsi_ratio = DIV_ROUND_UP(dsi_clk * 2, BXT_REF_CLOCK_KHZ);

        if (display->platform.broxton) {
                dsi_ratio_min = BXT_DSI_PLL_RATIO_MIN;
                dsi_ratio_max = BXT_DSI_PLL_RATIO_MAX;
        } else {
                dsi_ratio_min = GLK_DSI_PLL_RATIO_MIN;
                dsi_ratio_max = GLK_DSI_PLL_RATIO_MAX;
        }

        if (dsi_ratio < dsi_ratio_min || dsi_ratio > dsi_ratio_max) {
                drm_err(display->drm,
                        "Can't get a suitable ratio from DSI PLL ratios\n");
                return -ECHRNG;
        } else
                drm_dbg_kms(display->drm, "DSI PLL calculation is Done!!\n");

        /*
         * Program DSI ratio and Select MIPIC and MIPIA PLL output as 8x
         * Spec says both have to be programmed, even if one is not getting
         * used. Configure MIPI_CLOCK_CTL dividers in modeset
         */
        config->dsi_pll.ctrl = dsi_ratio | BXT_DSIA_16X_BY2;
        if (has_dsic_clock(display))
                config->dsi_pll.ctrl |= BXT_DSIC_16X_BY2;

        /* As per recommendation from hardware team,
         * Prog PVD ratio =1 if dsi ratio <= 50
         */
        if (display->platform.broxton && dsi_ratio <= 50)
                config->dsi_pll.ctrl |= BXT_DSI_PLL_PVD_RATIO_1;

        pclk = bxt_dsi_pclk(encoder, config);
        config->port_clock = pclk;

        /* FIXME definitely not right for burst/cmd mode/pixel overlap */
        config->hw.adjusted_mode.crtc_clock = pclk;
        if (intel_dsi->dual_link)
                config->hw.adjusted_mode.crtc_clock *= 2;

        return 0;
}

void bxt_dsi_pll_enable(struct intel_encoder *encoder,
                        const struct intel_crtc_state *config)
{
        struct intel_display *display = to_intel_display(encoder);
        struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
        enum port port;

        drm_dbg_kms(display->drm, "\n");

        /* Configure PLL vales */
        intel_de_write(display, BXT_DSI_PLL_CTL, config->dsi_pll.ctrl);
        intel_de_posting_read(display, BXT_DSI_PLL_CTL);

        /* Program TX, RX, Dphy clocks */
        if (display->platform.broxton) {
                for_each_dsi_port(port, intel_dsi->ports)
                        bxt_dsi_program_clocks(display, port, config);
        } else {
                glk_dsi_program_esc_clock(display, config);
        }

        /* Enable DSI PLL */
        intel_de_rmw(display, BXT_DSI_PLL_ENABLE, 0, BXT_DSI_PLL_DO_ENABLE);

        /* Timeout and fail if PLL not locked */
        if (intel_de_wait_for_set_ms(display, BXT_DSI_PLL_ENABLE,
                                     BXT_DSI_PLL_LOCKED, 1)) {
                drm_err(display->drm,
                        "Timed out waiting for DSI PLL to lock\n");
                return;
        }

        drm_dbg_kms(display->drm, "DSI PLL locked\n");
}

void bxt_dsi_reset_clocks(struct intel_encoder *encoder, enum port port)
{
        struct intel_display *display = to_intel_display(encoder);
        u32 tmp;

        /* Clear old configurations */
        if (display->platform.broxton) {
                tmp = intel_de_read(display, BXT_MIPI_CLOCK_CTL);
                tmp &= ~(BXT_MIPI_TX_ESCLK_FIXDIV_MASK(port));
                tmp &= ~(BXT_MIPI_RX_ESCLK_UPPER_FIXDIV_MASK(port));
                tmp &= ~(BXT_MIPI_8X_BY3_DIVIDER_MASK(port));
                tmp &= ~(BXT_MIPI_RX_ESCLK_LOWER_FIXDIV_MASK(port));
                intel_de_write(display, BXT_MIPI_CLOCK_CTL, tmp);
        } else {
                intel_de_rmw(display, MIPIO_TXESC_CLK_DIV1, GLK_TX_ESC_CLK_DIV1_MASK, 0);

                intel_de_rmw(display, MIPIO_TXESC_CLK_DIV2, GLK_TX_ESC_CLK_DIV2_MASK, 0);
        }
        intel_de_write(display, MIPI_EOT_DISABLE(display, port), CLOCKSTOP);
}

static void assert_dsi_pll(struct intel_display *display, bool state)
{
        bool cur_state;

        vlv_cck_get(display->drm);
        cur_state = vlv_cck_read(display->drm, CCK_REG_DSI_PLL_CONTROL) & DSI_PLL_VCO_EN;
        vlv_cck_put(display->drm);

        INTEL_DISPLAY_STATE_WARN(display, cur_state != state,
                                 "DSI PLL state assertion failure (expected %s, current %s)\n",
                                 str_on_off(state), str_on_off(cur_state));
}

void assert_dsi_pll_enabled(struct intel_display *display)
{
        assert_dsi_pll(display, true);
}

void assert_dsi_pll_disabled(struct intel_display *display)
{
        assert_dsi_pll(display, false);
}