[PATCH v2 13/32] drm/i915/cx0: Zero Cx0 PLL state before compute and HW readout

[Mika Kahola <mika.kahola@intel.com>]

From: Imre Deak <imre.deak@intel.com>

Ensure Cx0 pll state is initialized to zero before any computation or HW
readouts, to prevent leaving some parameter in the state uninitialized
in the actual compute/HW readout functions later.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Mika Kahola <mika.kahola@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
---
 drivers/gpu/drm/i915/display/intel_cx0_phy.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy.c b/drivers/gpu/drm/i915/display/intel_cx0_phy.c
index 0ad9fae230c9..df3daa81a698 100644
--- a/drivers/gpu/drm/i915/display/intel_cx0_phy.c
+++ b/drivers/gpu/drm/i915/display/intel_cx0_phy.c
@@ -2679,6 +2679,8 @@ static int intel_c20pll_calc_state(struct intel_crtc_state *crtc_state,
 int intel_cx0pll_calc_state(struct intel_crtc_state *crtc_state,
 			    struct intel_encoder *encoder)
 {
+	memset(&crtc_state->dpll_hw_state, 0, sizeof(crtc_state->dpll_hw_state));
+
 	if (intel_encoder_is_c10phy(encoder))
 		return intel_c10pll_calc_state(crtc_state, encoder);
 	return intel_c20pll_calc_state(crtc_state, encoder);
@@ -3612,7 +3614,7 @@ static void intel_c10pll_state_verify(const struct intel_crtc_state *state,
 void intel_cx0pll_readout_hw_state(struct intel_encoder *encoder,
 				   struct intel_cx0pll_state *pll_state)
 {
-	pll_state->use_c10 = false;
+	memset(pll_state, 0, sizeof(*pll_state));
 
 	pll_state->tbt_mode = intel_tc_port_in_tbt_alt_mode(enc_to_dig_port(encoder));
 	if (pll_state->tbt_mode)
-- 
2.34.1