drm/i915/tv: Rip out pipe-disabling nonsense from ->mode_set

The pipe and plane _are_ disabled when we call this. So replace it
all with the corresponding assert (as self-documenting code) and
rip out all the lore.

Checking for a disabled plane would require us to export those macros
from intel_display.c, but if the pipe is off the plane isn't working
either. So this single check is good enough.

Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c
index 3fd1ab3..722fcb7 100644 (file)
--- a/drivers/gpu/drm/i915/intel_tv.c
+++ b/drivers/gpu/drm/i915/intel_tv.c
@@ -1026,7 +1026,8 @@ static void intel_tv_mode_set(struct intel_encoder *encoder)
        const struct video_levels *video_levels;
        const struct color_conversion *color_conversion;
        bool burst_ena;
-       int pipe = intel_crtc->pipe;
+       int xpos = 0x0, ypos = 0x0;
+       unsigned int xsize, ysize;
 
        if (!tv_mode)
                return; /* can't happen (mode_prepare prevents this) */
@@ -1110,46 +1111,25 @@ static void intel_tv_mode_set(struct intel_encoder *encoder)
                I915_WRITE(TV_CLR_LEVEL,
                           ((video_levels->black << TV_BLACK_LEVEL_SHIFT) |
                            (video_levels->blank << TV_BLANK_LEVEL_SHIFT)));
-       {
-               int pipeconf_reg = PIPECONF(pipe);
-               int dspcntr_reg = DSPCNTR(intel_crtc->plane);
-               int pipeconf = I915_READ(pipeconf_reg);
-               int dspcntr = I915_READ(dspcntr_reg);
-               int xpos = 0x0, ypos = 0x0;
-               unsigned int xsize, ysize;
-               /* Pipe must be off here */
-               I915_WRITE(dspcntr_reg, dspcntr & ~DISPLAY_PLANE_ENABLE);
-               intel_flush_primary_plane(dev_priv, intel_crtc->plane);
-
-               /* Wait for vblank for the disable to take effect */
-               if (IS_GEN2(dev))
-                       intel_wait_for_vblank(dev, intel_crtc->pipe);
-
-               I915_WRITE(pipeconf_reg, pipeconf & ~PIPECONF_ENABLE);
-               /* Wait for vblank for the disable to take effect. */
-               intel_wait_for_pipe_off(dev, intel_crtc->pipe);
-
-               /* Filter ctl must be set before TV_WIN_SIZE */
-               I915_WRITE(TV_FILTER_CTL_1, TV_AUTO_SCALE);
-               xsize = tv_mode->hblank_start - tv_mode->hblank_end;
-               if (tv_mode->progressive)
-                       ysize = tv_mode->nbr_end + 1;
-               else
-                       ysize = 2*tv_mode->nbr_end + 1;
-
-               xpos += intel_tv->margin[TV_MARGIN_LEFT];
-               ypos += intel_tv->margin[TV_MARGIN_TOP];
-               xsize -= (intel_tv->margin[TV_MARGIN_LEFT] +
-                         intel_tv->margin[TV_MARGIN_RIGHT]);
-               ysize -= (intel_tv->margin[TV_MARGIN_TOP] +
-                         intel_tv->margin[TV_MARGIN_BOTTOM]);
-               I915_WRITE(TV_WIN_POS, (xpos<<16)|ypos);
-               I915_WRITE(TV_WIN_SIZE, (xsize<<16)|ysize);
-
-               I915_WRITE(pipeconf_reg, pipeconf);
-               I915_WRITE(dspcntr_reg, dspcntr);
-               intel_flush_primary_plane(dev_priv, intel_crtc->plane);
-       }
+
+       assert_pipe_disabled(dev_priv, intel_crtc->pipe);
+
+       /* Filter ctl must be set before TV_WIN_SIZE */
+       I915_WRITE(TV_FILTER_CTL_1, TV_AUTO_SCALE);
+       xsize = tv_mode->hblank_start - tv_mode->hblank_end;
+       if (tv_mode->progressive)
+               ysize = tv_mode->nbr_end + 1;
+       else
+               ysize = 2*tv_mode->nbr_end + 1;
+
+       xpos += intel_tv->margin[TV_MARGIN_LEFT];
+       ypos += intel_tv->margin[TV_MARGIN_TOP];
+       xsize -= (intel_tv->margin[TV_MARGIN_LEFT] +
+                 intel_tv->margin[TV_MARGIN_RIGHT]);
+       ysize -= (intel_tv->margin[TV_MARGIN_TOP] +
+                 intel_tv->margin[TV_MARGIN_BOTTOM]);
+       I915_WRITE(TV_WIN_POS, (xpos<<16)|ypos);
+       I915_WRITE(TV_WIN_SIZE, (xsize<<16)|ysize);
 
        j = 0;
        for (i = 0; i < 60; i++)