[PATCH 4.20 40/50] drm/i915: always return something on DDI clock selection

Greg Kroah-Hartman
2019-02-13T18:46:30Z

From: Lucas De Marchi <lucas.demarchi@intel.com>

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 <paulo.r.zanoni@intel.com>
Cc: <stable@vger.kernel.org> # v4.19+
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190125222444.19926-3-lucas.demarchi@intel.com
(cherry picked from commit 7a61a6dec3dfb9f2e8c39a337580a3c3036c5cdf)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
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;
default:
MISSING_CASE(clock);
- break;
+ return DDI_CLK_SEL_NONE;
}
case DPLL_ID_ICL_MGPLL1:
case DPLL_ID_ICL_MGPLL2: