drm/i915/psr: Use calculated io and fast wake lines

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[ Upstream commit 71c602103c ]

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: 64cf40a125 ("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 cb42e8ede5)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

This commit is contained in:

Jouni Högander 2023-02-21 10:53:04 +02:00 • committed by Greg Kroah-Hartman

parent a2410d0c3d

commit d586d58c3f

2 changed files with 63 additions and 17 deletions

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2

drivers/gpu/drm/i915/display/intel_display_types.h

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78

drivers/gpu/drm/i915/display/intel_psr.c

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