Patch "drm/i915: Do not match JSL in ehl_combo_pll_div_frac_wa_needed()" has been added to the 6.6-stable tree

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This is a note to let you know that I've just added the patch titled

    drm/i915: Do not match JSL in ehl_combo_pll_div_frac_wa_needed()

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-i915-do-not-match-jsl-in-ehl_combo_pll_div_frac_wa_needed.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From e41d769f1a7a1dc533c35ef7b366be3dbf432a1c Mon Sep 17 00:00:00 2001
From: Jonathon Hall <jonathon.hall@xxxxxxx>
Date: Wed, 13 Mar 2024 09:54:25 -0400
Subject: drm/i915: Do not match JSL in ehl_combo_pll_div_frac_wa_needed()

From: Jonathon Hall <jonathon.hall@xxxxxxx>

commit e41d769f1a7a1dc533c35ef7b366be3dbf432a1c upstream.

Since commit 0c65dc062611 ("drm/i915/jsl: s/JSL/JASPERLAKE for
platform/subplatform defines"), boot freezes on a Jasper Lake tablet
(Librem 11), usually with graphical corruption on the eDP display,
but sometimes just a black screen.  This commit was included in 6.6 and
later.

That commit was intended to refactor EHL and JSL macros, but the change
to ehl_combo_pll_div_frac_wa_needed() started matching JSL incorrectly
when it was only intended to match EHL.

It replaced:
	return ((IS_PLATFORM(i915, INTEL_ELKHARTLAKE) &&
		 IS_JSL_EHL_DISPLAY_STEP(i915, STEP_B0, STEP_FOREVER)) ||
with:
	return (((IS_ELKHARTLAKE(i915) || IS_JASPERLAKE(i915)) &&
		 IS_DISPLAY_STEP(i915, STEP_B0, STEP_FOREVER)) ||

Remove IS_JASPERLAKE() to fix the regression.

Signed-off-by: Jonathon Hall <jonathon.hall@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 0c65dc062611 ("drm/i915/jsl: s/JSL/JASPERLAKE for platform/subplatform defines")
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20240313135424.3731410-1-jonathon.hall@xxxxxxx
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
(cherry picked from commit 1ef48859317b2a77672dea8682df133abf9c44ed)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/i915/display/intel_dpll_mgr.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
+++ b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
@@ -2462,7 +2462,7 @@ static void icl_wrpll_params_populate(st
 static bool
 ehl_combo_pll_div_frac_wa_needed(struct drm_i915_private *i915)
 {
-	return (((IS_ELKHARTLAKE(i915) || IS_JASPERLAKE(i915)) &&
+	return ((IS_ELKHARTLAKE(i915) &&
 		 IS_DISPLAY_STEP(i915, STEP_B0, STEP_FOREVER)) ||
 		 IS_TIGERLAKE(i915) || IS_ALDERLAKE_S(i915) || IS_ALDERLAKE_P(i915)) &&
 		 i915->display.dpll.ref_clks.nssc == 38400;


Patches currently in stable-queue which might be from jonathon.hall@xxxxxxx are

queue-6.6/drm-i915-do-not-match-jsl-in-ehl_combo_pll_div_frac_wa_needed.patch




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