drm/i915: Fix SDVO CREATE_PREFERRED_INPUT_TIMING command

This brings fix commit acde0ef683 from 2D driver.
Signed-off-by: NZhenyu Wang <zhenyu.z.wang@intel.com>
Signed-off-by: NEric Anholt <eric@anholt.net>

drivers/gpu/drm/i915/intel_sdvo.c

@@ -589,9 +589,12 @@ intel_sdvo_create_preferred_input_timing(struct intel_output *output,
 	struct intel_sdvo_preferred_input_timing_args args;
 	uint8_t status;
 
+	memset(&args, 0, sizeof(args));
 	args.clock = clock;
 	args.width = width;
 	args.height = height;
+	args.interlace = 0;
+	args.scaled = 0;
 	intel_sdvo_write_cmd(output, SDVO_CMD_CREATE_PREFERRED_INPUT_TIMING,
 			     &args, sizeof(args));
 	status = intel_sdvo_read_response(output, NULL, 0);

drivers/gpu/drm/i915/intel_sdvo_regs.h

@@ -100,6 +100,9 @@ struct intel_sdvo_preferred_input_timing_args {
     u16 clock;
     u16 width;
     u16 height;
+    u8	interlace:1;
+    u8	scaled:1;
+    u8	pad:6;
 } __attribute__((packed));
 
 /* I2C registers for SDVO */