diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_cdclk.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_cdclk.c | 118 |
1 files changed, 73 insertions, 45 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c b/drivers/gpu/drm/i915/display/intel_cdclk.c index c4839c67cb0f..c985ebb6831a 100644 --- a/drivers/gpu/drm/i915/display/intel_cdclk.c +++ b/drivers/gpu/drm/i915/display/intel_cdclk.c @@ -1180,7 +1180,7 @@ sanitize: /* force cdclk programming */ dev_priv->display.cdclk.hw.cdclk = 0; /* force full PLL disable + enable */ - dev_priv->display.cdclk.hw.vco = -1; + dev_priv->display.cdclk.hw.vco = ~0; } static void skl_cdclk_init_hw(struct drm_i915_private *dev_priv) @@ -1446,50 +1446,77 @@ static u8 bxt_calc_voltage_level(int cdclk) return DIV_ROUND_UP(cdclk, 25000); } +static u8 calc_voltage_level(int cdclk, int num_voltage_levels, + const int voltage_level_max_cdclk[]) +{ + int voltage_level; + + for (voltage_level = 0; voltage_level < num_voltage_levels; voltage_level++) { + if (cdclk <= voltage_level_max_cdclk[voltage_level]) + return voltage_level; + } + + MISSING_CASE(cdclk); + return num_voltage_levels - 1; +} + static u8 icl_calc_voltage_level(int cdclk) { - if (cdclk > 556800) - return 2; - else if (cdclk > 312000) - return 1; - else - return 0; + static const int icl_voltage_level_max_cdclk[] = { + [0] = 312000, + [1] = 556800, + [2] = 652800, + }; + + return calc_voltage_level(cdclk, + ARRAY_SIZE(icl_voltage_level_max_cdclk), + icl_voltage_level_max_cdclk); } static u8 ehl_calc_voltage_level(int cdclk) { - if (cdclk > 326400) - return 3; - else if (cdclk > 312000) - return 2; - else if (cdclk > 180000) - return 1; - else - return 0; + static const int ehl_voltage_level_max_cdclk[] = { + [0] = 180000, + [1] = 312000, + [2] = 326400, + /* + * Bspec lists the limit as 556.8 MHz, but some JSL + * development boards (at least) boot with 652.8 MHz + */ + [3] = 652800, + }; + + return calc_voltage_level(cdclk, + ARRAY_SIZE(ehl_voltage_level_max_cdclk), + ehl_voltage_level_max_cdclk); } static u8 tgl_calc_voltage_level(int cdclk) { - if (cdclk > 556800) - return 3; - else if (cdclk > 326400) - return 2; - else if (cdclk > 312000) - return 1; - else - return 0; + static const int tgl_voltage_level_max_cdclk[] = { + [0] = 312000, + [1] = 326400, + [2] = 556800, + [3] = 652800, + }; + + return calc_voltage_level(cdclk, + ARRAY_SIZE(tgl_voltage_level_max_cdclk), + tgl_voltage_level_max_cdclk); } static u8 rplu_calc_voltage_level(int cdclk) { - if (cdclk > 556800) - return 3; - else if (cdclk > 480000) - return 2; - else if (cdclk > 312000) - return 1; - else - return 0; + static const int rplu_voltage_level_max_cdclk[] = { + [0] = 312000, + [1] = 480000, + [2] = 556800, + [3] = 652800, + }; + + return calc_voltage_level(cdclk, + ARRAY_SIZE(rplu_voltage_level_max_cdclk), + rplu_voltage_level_max_cdclk); } static void icl_readout_refclk(struct drm_i915_private *dev_priv, @@ -1800,6 +1827,8 @@ static bool cdclk_pll_is_unknown(unsigned int vco) return vco == ~0; } +static const int cdclk_squash_len = 16; + static int cdclk_squash_divider(u16 waveform) { return hweight16(waveform ?: 0xffff); @@ -1811,7 +1840,6 @@ static bool cdclk_compute_crawl_and_squash_midpoint(struct drm_i915_private *i91 struct intel_cdclk_config *mid_cdclk_config) { u16 old_waveform, new_waveform, mid_waveform; - int size = 16; int div = 2; /* Return if PLL is in an unknown state, force a complete disable and re-enable. */ @@ -1850,7 +1878,8 @@ static bool cdclk_compute_crawl_and_squash_midpoint(struct drm_i915_private *i91 } mid_cdclk_config->cdclk = DIV_ROUND_CLOSEST(cdclk_squash_divider(mid_waveform) * - mid_cdclk_config->vco, size * div); + mid_cdclk_config->vco, + cdclk_squash_len * div); /* make sure the mid clock came out sane */ @@ -1878,9 +1907,9 @@ static void _bxt_set_cdclk(struct drm_i915_private *dev_priv, { int cdclk = cdclk_config->cdclk; int vco = cdclk_config->vco; - u32 val; + int unsquashed_cdclk; u16 waveform; - int clock; + u32 val; if (HAS_CDCLK_CRAWL(dev_priv) && dev_priv->display.cdclk.hw.vco > 0 && vco > 0 && !cdclk_pll_is_unknown(dev_priv->display.cdclk.hw.vco)) { @@ -1897,15 +1926,13 @@ static void _bxt_set_cdclk(struct drm_i915_private *dev_priv, waveform = cdclk_squash_waveform(dev_priv, cdclk); - if (waveform) - clock = vco / 2; - else - clock = cdclk; + unsquashed_cdclk = DIV_ROUND_CLOSEST(cdclk * cdclk_squash_len, + cdclk_squash_divider(waveform)); if (HAS_CDCLK_SQUASH(dev_priv)) dg2_cdclk_squash_program(dev_priv, waveform); - val = bxt_cdclk_cd2x_div_sel(dev_priv, clock, vco) | + val = bxt_cdclk_cd2x_div_sel(dev_priv, unsquashed_cdclk, vco) | bxt_cdclk_cd2x_pipe(dev_priv, pipe); /* @@ -2075,7 +2102,7 @@ sanitize: dev_priv->display.cdclk.hw.cdclk = 0; /* force full PLL disable + enable */ - dev_priv->display.cdclk.hw.vco = -1; + dev_priv->display.cdclk.hw.vco = ~0; } static void bxt_cdclk_init_hw(struct drm_i915_private *dev_priv) @@ -2597,9 +2624,10 @@ static int intel_vdsc_min_cdclk(const struct intel_crtc_state *crtc_state) * Since PPC = 2 with bigjoiner * => CDCLK >= compressed_bpp * Pixel clock / 2 * Bigjoiner Interface bits */ - int bigjoiner_interface_bits = DISPLAY_VER(i915) > 13 ? 36 : 24; - int min_cdclk_bj = (crtc_state->dsc.compressed_bpp * pixel_clock) / - (2 * bigjoiner_interface_bits); + int bigjoiner_interface_bits = DISPLAY_VER(i915) >= 14 ? 36 : 24; + int min_cdclk_bj = + (to_bpp_int_roundup(crtc_state->dsc.compressed_bpp_x16) * + pixel_clock) / (2 * bigjoiner_interface_bits); min_cdclk = max(min_cdclk, min_cdclk_bj); } @@ -3488,7 +3516,7 @@ static const struct intel_cdclk_funcs mtl_cdclk_funcs = { .get_cdclk = bxt_get_cdclk, .set_cdclk = bxt_set_cdclk, .modeset_calc_cdclk = bxt_modeset_calc_cdclk, - .calc_voltage_level = tgl_calc_voltage_level, + .calc_voltage_level = rplu_calc_voltage_level, }; static const struct intel_cdclk_funcs rplu_cdclk_funcs = { |