Maarten Lankhorst ed06efb801 drm/i915/dp: Fix dsc bpp calculations, v5. ... There was a integer wraparound when mode_clock became too high, and we didn't correct for the FEC overhead factor when dividing, with the calculations breaking at HBR3. As a result our calculated bpp was way too high, and the link width limitation never came into effect. Print out the resulting bpp calcululations as a sanity check, just in case we ever have to debug it later on again. We also used the wrong factor for FEC. While bspec mentions 2.4%, all the calculations use 1/0.972261, and the same ratio should be applied to data M/N as well, so use it there when FEC is enabled. This fixes the FIFO underrun we are seeing with FEC enabled. Changes since v2: - Handle fec_enable in intel_link_compute_m_n, so only data M/N is adjusted. (Ville) - Fix initial hardware readout for FEC. (Ville) Changes since v3: - Remove bogus fec_to_mode_clock. (Ville) Changes since v4: - Use the correct register for icl. (Ville) - Split hw readout to a separate patch. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Fixes: d9218c8f6c ("drm/i915/dp: Add helpers for Compressed BPP and Slice Count for DSC") Cc: <stable@vger.kernel.org> # v5.0+ Cc: Manasi Navare <manasi.d.navare@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190925082110.17439-1-maarten.lankhorst@linux.intel.com Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>		2019-09-25 13:26:05 +02:00
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drm	drm/i915/dp: Fix dsc bpp calculations, v5.	2019-09-25 13:26:05 +02:00
host1x	drm/tegra: Changes for v5.3-rc1	2019-06-25 12:59:43 +10:00
ipu-v3	drm main pull request for v5.3-rc1 (sans mm changes)	2019-07-15 19:04:27 -07:00
vga	topic/remove-fbcon-notifiers:	2019-06-26 12:26:34 +02:00
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