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drm/i915/mtl: Skip doubling channel numbers for LPDDR4/LPDDDR5
MTL LPDDR5 reported 16b with 8 channels. Previous platforms reported 32b with 4 channels and hence needed a multiplication by a factor of 2. Skip increasing the channels for MTL. v2: Use version check instead of platform check(MattR) Bspec: 64631 Cc: Matt Roper <matthew.d.roper@intel.com> Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com> Reviewed-by: Matt Roper <matthew.d.roper@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20221117213015.584417-2-radhakrishna.sripada@intel.com
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1 changed files with 2 additions and 1 deletions
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@ -439,7 +439,8 @@ static int tgl_get_bw_info(struct drm_i915_private *dev_priv, const struct intel
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return ret;
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}
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if (dram_info->type == INTEL_DRAM_LPDDR4 || dram_info->type == INTEL_DRAM_LPDDR5)
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if (DISPLAY_VER(dev_priv) < 14 &&
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(dram_info->type == INTEL_DRAM_LPDDR4 || dram_info->type == INTEL_DRAM_LPDDR5))
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num_channels *= 2;
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qi.deinterleave = qi.deinterleave ? : DIV_ROUND_UP(num_channels, is_y_tile ? 4 : 2);
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