drm/i915/wm: DG2 doesn't have dram info to look up wm_lv_0_adjust_needed

There's no dram info on DG2 that we could use. The struct dram_info is
all zero on it, but be explicit about this.

Reviewed-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
Link: https://lore.kernel.org/r/a866641bff364dcfcaaabaa1d53c4a8cfa94ff3f.1748337870.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

diff --git a/drivers/gpu/drm/i915/display/skl_watermark.c b/drivers/gpu/drm/i915/display/skl_watermark.c
index f5600f4b77721180b7c32e6979764ae60db8a616..817939f6d4ddfc409959b082b655a45d95db91db 100644 (file)
--- a/drivers/gpu/drm/i915/display/skl_watermark.c
+++ b/drivers/gpu/drm/i915/display/skl_watermark.c
@@ -3251,7 +3251,7 @@ adjust_wm_latency(struct intel_display *display,
         * any underrun. If not able to get Dimm info assume 16GB dimm
         * to avoid any underrun.
         */
-       if (dram_info->wm_lv_0_adjust_needed)
+       if (!display->platform.dg2 && dram_info->wm_lv_0_adjust_needed)
                wm[0] += 1;
 }