drm/i915: use cpu_transcoder for TRANS_DDI_FUNC_CTL

... inside haswell_get_pipe_config. Because there's one TRANS_DDI_FUNC_CTL
register per CPU transcoder, not per pipe. This solves "unclaimed register"
messages when booting with eDP only and using the i915.disable_power_well=1.

Also fix a comment and remove an useless empty line.

The error messages were caused by:

  commit 88adfff1ad5019f65b9d0b4e1a4ac900fb065183
  Author: Daniel Vetter <daniel.vetter@ffwll.ch>
  Date:   Thu Mar 28 10:42:01 2013 +0100
      drm/i915: hw readout support for ->has_pch_encoders

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 6f7e4cc35d99add55151e470117b424df336d27c..3c90605ddd45e59764b06f8b1bda019ed9b14645 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5990,16 +5990,15 @@ static bool haswell_get_pipe_config(struct intel_crtc *crtc,
                return false;
 
        /*
-        * aswell has only FDI/PCH transcoder A. It is which is connected to
+        * Haswell has only FDI/PCH transcoder A. It is which is connected to
         * DDI E. So just check whether this pipe is wired to DDI E and whether
         * the PCH transcoder is on.
         */
-       tmp = I915_READ(TRANS_DDI_FUNC_CTL(crtc->pipe));
+       tmp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
        if ((tmp & TRANS_DDI_PORT_MASK) == TRANS_DDI_SELECT_PORT(PORT_E) &&
            I915_READ(TRANSCONF(PIPE_A)) & TRANS_ENABLE)
                pipe_config->has_pch_encoder = true;
 
-
        return true;
 }