From: Stanislav Lisovskiy stanislav.lisovskiy@intel.com
[ Upstream commit 859161b952a453b86362f168fadef72a8ba31a05 ]
We seem to need this W/A same way as for TGL, in order to fix some of the underruns, which we currently have and those not related to PSR.
Signed-off-by: Stanislav Lisovskiy stanislav.lisovskiy@intel.com Reviewed-by: Uma Shankar uma.shankar@intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20220614123049.16183-2-stanisl... Stable-dep-of: 4234ea300512 ("drm/i915/display: avoid warnings when registering dual panel backlight") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/i915/display/intel_cdclk.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c b/drivers/gpu/drm/i915/display/intel_cdclk.c index 6e80162632dd..86a22c3766e5 100644 --- a/drivers/gpu/drm/i915/display/intel_cdclk.c +++ b/drivers/gpu/drm/i915/display/intel_cdclk.c @@ -2300,7 +2300,7 @@ int intel_crtc_compute_min_cdclk(const struct intel_crtc_state *crtc_state) min_cdclk = max(min_cdclk, (int)crtc_state->pixel_rate);
/* - * HACK. Currently for TGL platforms we calculate + * HACK. Currently for TGL/DG2 platforms we calculate * min_cdclk initially based on pixel_rate divided * by 2, accounting for also plane requirements, * however in some cases the lowest possible CDCLK @@ -2308,7 +2308,7 @@ int intel_crtc_compute_min_cdclk(const struct intel_crtc_state *crtc_state) * Explicitly stating here that this seems to be currently * rather a Hack, than final solution. */ - if (IS_TIGERLAKE(dev_priv)) { + if (IS_TIGERLAKE(dev_priv) || IS_DG2(dev_priv)) { /* * Clamp to max_cdclk_freq in case pixel rate is higher, * in order not to break an 8K, but still leave W/A at place.