drm/i915: rip out TV-out lore ...

This seems to be an impressive piece of copy&pasta lore. I've
checked all docs and on most platforms these bits are all MBZ, with
the exception of the SDVO pixel multiplier on gen3. On gen4 that
moved to a special DPLL_MD registers.

No indication whatsoever that we actually need this for native
TV-out support. I suspect this started as a hack when we didn't
yet have proper pixel multiplier support in place for SDVO TV, but
then got stuck in a life of its own.

Just rip it out.

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 0 insertions, 4 deletions

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 5fcd5b09ff56..97a29c4c27f7 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4589,10 +4589,6 @@ static void i9xx_update_pll(struct intel_crtc *crtc,
 
         if (is_sdvo && intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_TVOUT))
                 dpll |= PLL_REF_INPUT_TVCLKINBC;
-        else if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_TVOUT))
-                /* XXX: just matching BIOS for now */
-                /*      dpll |= PLL_REF_INPUT_TVCLKINBC; */
-                dpll |= 3;
         else if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_LVDS) &&
                  intel_panel_use_ssc(dev_priv) && num_connectors < 2)
                 dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;