diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dp.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 9f40da20e88d..12bd2f322e62 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -500,7 +500,7 @@ intel_dp_set_source_rates(struct intel_dp *intel_dp) else if (IS_ALDERLAKE_P(dev_priv) || IS_ALDERLAKE_S(dev_priv) || IS_DG1(dev_priv) || IS_ROCKETLAKE(dev_priv)) max_rate = 810000; - else if (IS_JSL_EHL(dev_priv)) + else if (IS_JASPERLAKE(dev_priv) || IS_ELKHARTLAKE(dev_priv)) max_rate = ehl_max_source_rate(intel_dp); else max_rate = icl_max_source_rate(intel_dp); @@ -510,7 +510,7 @@ intel_dp_set_source_rates(struct intel_dp *intel_dp) } else if (DISPLAY_VER(dev_priv) == 9) { source_rates = skl_rates; size = ARRAY_SIZE(skl_rates); - } else if ((IS_HASWELL(dev_priv) && !IS_HSW_ULX(dev_priv)) || + } else if ((IS_HASWELL(dev_priv) && !IS_HASWELL_ULX(dev_priv)) || IS_BROADWELL(dev_priv)) { source_rates = hsw_rates; size = ARRAY_SIZE(hsw_rates); @@ -713,9 +713,18 @@ u32 intel_dp_dsc_nearest_valid_bpp(struct drm_i915_private *i915, u32 bpp, u32 p /* * According to BSpec, 27 is the max DSC output bpp, - * 8 is the min DSC output bpp + * 8 is the min DSC output bpp. + * While we can still clamp higher bpp values to 27, saving bandwidth, + * if it is required to oompress up to bpp < 8, means we can't do + * that and probably means we can't fit the required mode, even with + * DSC enabled. */ - bits_per_pixel = clamp_t(u32, bits_per_pixel, 8, 27); + if (bits_per_pixel < 8) { + drm_dbg_kms(&i915->drm, "Unsupported BPP %u, min 8\n", + bits_per_pixel); + return 0; + } + bits_per_pixel = min_t(u32, bits_per_pixel, 27); } else { /* Find the nearest match in the array of known BPPs from VESA */ for (i = 0; i < ARRAY_SIZE(valid_dsc_bpp) - 1; i++) { |