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Date:   Wed, 13 Feb 2019 19:38:45 +0100
From:   Greg Kroah-Hartman <>
Cc:     Greg Kroah-Hartman <>,, Paulo Zanoni <>,
        Lucas De Marchi <>,
        Mika Kahola <>,
        Jani Nikula <>
Subject: [PATCH 4.20 40/50] drm/i915: always return something on DDI clock selection

4.20-stable review patch.  If anyone has any objections, please let me know.


From: Lucas De Marchi <>

commit 2a121030d4ee3f84f60c6f415f9c44bffbcde81d upstream.

Even if we don't have the correct clock and get a warning, we should not
skip the return.

v2: improve commit message (from Joonas)

Fixes: 1fa11ee2d9d0 ("drm/i915/icl: start adding the TBT pll")
Cc: Paulo Zanoni <>
Cc: <> # v4.19+
Signed-off-by: Lucas De Marchi <>
Reviewed-by: Mika Kahola <>
(cherry picked from commit 7a61a6dec3dfb9f2e8c39a337580a3c3036c5cdf)
Signed-off-by: Jani Nikula <>
Signed-off-by: Greg Kroah-Hartman <>

 drivers/gpu/drm/i915/intel_ddi.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -1085,7 +1085,7 @@ static uint32_t icl_pll_to_ddi_pll_sel(s
 			return DDI_CLK_SEL_TBT_810;
-			break;
+			return DDI_CLK_SEL_NONE;

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