drm/i915: Use intel_get_pipe_timings() and intel_mode_from_pipe_config() in intel_crtc_mode_get()

Eliminate the duplicate code for pipe timing readout in
intel_crtc_mode_get() by using the functions we use for the normal state
readout.

v2: Store dotclock in adjusted_mode instead of the final mode

Cc: dri-devel@lists.freedesktop.org
Cc: Rob Kramer <rob@solution-space.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Tested-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/1459536530-17754-1-git-send-email-ville.syrjala@linux.intel.com

drivers/gpu/drm/i915/intel_display.c

@@ -10253,10 +10253,8 @@ struct drm_display_mode *intel_crtc_mode_get(struct drm_device *dev,
 {
 	struct drm_i915_private *dev_priv = to_i915(dev);
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
-	enum transcoder cpu_transcoder;
 	struct drm_display_mode *mode;
 	struct intel_crtc_state *pipe_config;
-	u32 htot, hsync, vtot, vsync;
 	enum pipe pipe = intel_crtc->pipe;
 
 	mode = kzalloc(sizeof(*mode), GFP_KERNEL);
@@ -10283,24 +10281,12 @@ struct drm_display_mode *intel_crtc_mode_get(struct drm_device *dev,
 	pipe_config->dpll_hw_state.fp1 = I915_READ(FP1(pipe));
 	i9xx_crtc_clock_get(intel_crtc, pipe_config);
 
-	mode->clock = pipe_config->port_clock / pipe_config->pixel_multiplier;
-
-	cpu_transcoder = pipe_config->cpu_transcoder;
-	htot = I915_READ(HTOTAL(cpu_transcoder));
-	hsync = I915_READ(HSYNC(cpu_transcoder));
-	vtot = I915_READ(VTOTAL(cpu_transcoder));
-	vsync = I915_READ(VSYNC(cpu_transcoder));
+	pipe_config->base.adjusted_mode.crtc_clock =
+		pipe_config->port_clock / pipe_config->pixel_multiplier;
 
-	mode->hdisplay = (htot & 0xffff) + 1;
-	mode->htotal = ((htot & 0xffff0000) >> 16) + 1;
-	mode->hsync_start = (hsync & 0xffff) + 1;
-	mode->hsync_end = ((hsync & 0xffff0000) >> 16) + 1;
-	mode->vdisplay = (vtot & 0xffff) + 1;
-	mode->vtotal = ((vtot & 0xffff0000) >> 16) + 1;
-	mode->vsync_start = (vsync & 0xffff) + 1;
-	mode->vsync_end = ((vsync & 0xffff0000) >> 16) + 1;
+	intel_get_pipe_timings(intel_crtc, pipe_config);
 
-	drm_mode_set_name(mode);
+	intel_mode_from_pipe_config(mode, pipe_config);
 
 	kfree(pipe_config);