drm/i915/bios: Fix the timing parameters

Fix htotal and vtotal parameters derived from DTD block of VBT. The
values miss the back porch.

Fixes: d677effda7dc ("drm/i915/vbt: Handle generic DTD block")
Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200124125829.16973-1-vandita.kulkarni@intel.com
(cherry picked from commit ad278f358446707d03a1fe89f880e6ac80ca06cd)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c
index 8beac06e3f10f213ae736f7fde35b309c51341c9..ef4017a1babaa10e17ae4271ffa8b94e00c158d6 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_bios.c
+++ b/drivers/gpu/drm/i915/display/intel_bios.c
@@ -357,14 +357,16 @@ parse_generic_dtd(struct drm_i915_private *dev_priv,
                panel_fixed_mode->hdisplay + dtd->hfront_porch;
        panel_fixed_mode->hsync_end =
                panel_fixed_mode->hsync_start + dtd->hsync;
-       panel_fixed_mode->htotal = panel_fixed_mode->hsync_end;
+       panel_fixed_mode->htotal =
+               panel_fixed_mode->hdisplay + dtd->hblank;
 
        panel_fixed_mode->vdisplay = dtd->vactive;
        panel_fixed_mode->vsync_start =
                panel_fixed_mode->vdisplay + dtd->vfront_porch;
        panel_fixed_mode->vsync_end =
                panel_fixed_mode->vsync_start + dtd->vsync;
-       panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end;
+       panel_fixed_mode->vtotal =
+               panel_fixed_mode->vdisplay + dtd->vblank;
 
        panel_fixed_mode->clock = dtd->pixel_clock;
        panel_fixed_mode->width_mm = dtd->width_mm;