From 7a429a14f852c6a8cd4710078613cf2bd2a4eb6e Mon Sep 17 00:00:00 2001 From: =?utf8?q?Jouni=20H=C3=B6gander?= Date: Wed, 9 Apr 2025 08:49:09 +0300 Subject: [PATCH] drm/i915/vrr: Stop writing VRR_CTL_IGN_MAX_SHIFT for MTL onwards MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit According to Bspec VRR_CTL_IGN_MAX_SHIFT doesn't exist for MTL and onwards. On LunarLake and onwards Bit 30 is "Mask Block PkgC" instead. Stop writing the bit for MeteorLake and onwards v2: "Ignore Max Shift" bit doesn't exist on MeteorLake either Bspec: 50508, 68925 Signed-off-by: Jouni Högander Reviewed-by: Ankit Nautiyal Link: https://lore.kernel.org/r/20250409054909.968531-1-jouni.hogander@intel.com --- drivers/gpu/drm/i915/display/intel_vrr.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c index 633a66f6b73b..c6565baf815a 100644 --- a/drivers/gpu/drm/i915/display/intel_vrr.c +++ b/drivers/gpu/drm/i915/display/intel_vrr.c @@ -444,7 +444,10 @@ static u32 trans_vrr_ctl(const struct intel_crtc_state *crtc_state) { struct intel_display *display = to_intel_display(crtc_state); - if (DISPLAY_VER(display) >= 13) + if (DISPLAY_VER(display) >= 14) + return VRR_CTL_FLIP_LINE_EN | + XELPD_VRR_CTL_VRR_GUARDBAND(crtc_state->vrr.guardband); + else if (DISPLAY_VER(display) >= 13) return VRR_CTL_IGN_MAX_SHIFT | VRR_CTL_FLIP_LINE_EN | XELPD_VRR_CTL_VRR_GUARDBAND(crtc_state->vrr.guardband); else -- 2.25.1