From: José Roberto de Souza Date: Wed, 26 Jun 2019 01:40:51 +0000 (-0700) Subject: drm/i915/icl: Add new supported CD clocks X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=9c811fce8a443921beaefef812c2caae8c2df427;p=linux.git drm/i915/icl: Add new supported CD clocks Now 180, 172.8 and 192 MHz are supported. 180 and 172.8 MHz CD clocks will only be used when audio is not enabled as state by BSpec and implemented in intel_crtc_compute_min_cdclk(), CD clock must be at least twice of Azalia BCLK and BCLK by default is 96 MHz, it could be set to 48 MHz but we are not reading it. v3: - making icl clock arrays static (Ville) BSpec: 20598 BSpec: 15729 Cc: Clint Taylor Cc: Ville Syrjälä Reviewed-by: Matt Roper Signed-off-by: José Roberto de Souza Link: https://patchwork.freedesktop.org/patch/msgid/20190626014053.30541-1-jose.souza@intel.com --- diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c b/drivers/gpu/drm/i915/display/intel_cdclk.c index 8993ab283562b..c8ebd31f7c24b 100644 --- a/drivers/gpu/drm/i915/display/intel_cdclk.c +++ b/drivers/gpu/drm/i915/display/intel_cdclk.c @@ -1756,9 +1756,10 @@ sanitize: static int icl_calc_cdclk(int min_cdclk, unsigned int ref) { - int ranges_24[] = { 312000, 552000, 648000 }; - int ranges_19_38[] = { 307200, 556800, 652800 }; - int *ranges; + static const int ranges_24[] = { 180000, 192000, 312000, 552000, 648000 }; + static const int ranges_19_38[] = { 172800, 192000, 307200, 556800, 652800 }; + const int *ranges; + int len, i; switch (ref) { default: @@ -1766,19 +1767,22 @@ static int icl_calc_cdclk(int min_cdclk, unsigned int ref) /* fall through */ case 24000: ranges = ranges_24; + len = ARRAY_SIZE(ranges_24); break; case 19200: case 38400: ranges = ranges_19_38; + len = ARRAY_SIZE(ranges_19_38); break; } - if (min_cdclk > ranges[1]) - return ranges[2]; - else if (min_cdclk > ranges[0]) - return ranges[1]; - else - return ranges[0]; + for (i = 0; i < len; i++) { + if (min_cdclk <= ranges[i]) + return ranges[i]; + } + + WARN_ON(min_cdclk > ranges[len - 1]); + return ranges[len - 1]; } static int icl_calc_cdclk_pll_vco(struct drm_i915_private *dev_priv, int cdclk) @@ -1792,16 +1796,24 @@ static int icl_calc_cdclk_pll_vco(struct drm_i915_private *dev_priv, int cdclk) default: MISSING_CASE(cdclk); /* fall through */ + case 172800: case 307200: case 556800: case 652800: WARN_ON(dev_priv->cdclk.hw.ref != 19200 && dev_priv->cdclk.hw.ref != 38400); break; + case 180000: case 312000: case 552000: case 648000: WARN_ON(dev_priv->cdclk.hw.ref != 24000); + break; + case 192000: + WARN_ON(dev_priv->cdclk.hw.ref != 19200 && + dev_priv->cdclk.hw.ref != 38400 && + dev_priv->cdclk.hw.ref != 24000); + break; } ratio = cdclk / (dev_priv->cdclk.hw.ref / 2);