drm/i915/psr: Use calculated io and fast wake lines
authorJouni Högander <jouni.hogander@intel.com>
Tue, 21 Feb 2023 08:53:04 +0000 (10:53 +0200)
committerJani Nikula <jani.nikula@intel.com>
Mon, 13 Mar 2023 09:38:05 +0000 (11:38 +0200)
commit71c602103c74b277bef3d20a308874a33ec8326d
treef1997392088b1b8c0096371e9241a4ca4645cee3
parent897f453c106380e57600c19a0a0485ceb4f3b0d9
drm/i915/psr: Use calculated io and fast wake lines

Currently we are using hardcoded 7 for io and fast wake lines.

According to Bspec io and fast wake times are both 42us for
DISPLAY_VER >= 12 and 50us and 32us for older platforms.

Calculate line counts for these and configure them into PSR2_CTL
accordingly

Use 45 us for the fast wake calculation as 42 seems to be too
tight based on testing.

Bspec: 49274, 4289

Cc: Mika Kahola <mika.kahola@intel.com>
Cc: José Roberto de Souza <jose.souza@intel.com>
Fixes: 64cf40a125ff ("drm/i915/psr: Program default IO buffer Wake and Fast Wake")
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/7725
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230221085304.3382297-1-jouni.hogander@intel.com
(cherry picked from commit cb42e8ede5b475c096e473b86c356b1158b4bc3b)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
drivers/gpu/drm/i915/display/intel_display_types.h
drivers/gpu/drm/i915/display/intel_psr.c