[Intel-gfx] [PATCH 3/8] Port ready checks for vlv

[Daniel Vetter]

On Thu, Apr 18, 2013 at 10:46:10AM +0200, Daniel Vetter wrote:
> Since Paulo's hdmi/dp encoder rework we have the port number ready
> at hand, so no need to do ugly hardcoding like that. Also, there's
> the ->pre_enable hook right above waiting to be used.
> 
> Please encapsulate this into a vlv_check_dpll_port_ready(dev_priv, port)
> or so and call it from hdmi/dp_pre_enable functions.
> ---
>  drivers/gpu/drm/i915/intel_display.c |   17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index c124dba..86c4b6d 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -3866,6 +3866,23 @@ static void i9xx_crtc_enable(struct drm_crtc *crtc)
>  		if (encoder->pre_enable)
>  			encoder->pre_enable(encoder);
>  
> +	if (IS_VALLEYVIEW(dev)) {
> +		char port;
> +
> +		if (intel_pipe_has_type(crtc, INTEL_OUTPUT_HDMI) ||
> +		    intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT)) {
> +			port_mask = DPLL_PORTB_READY_MASK;
> +			port = 'B';
> +		} else {
> +			port_mask = DPLL_PORTC_READY_MASK; /* eDP on port C */
> +			port = 'C';
> +		}
> +
> +		if (wait_for((I915_READ(DPLL(0)) & port_mask) == 0, 1000))
> +			WARN(1, "timed out waiting for port %c ready: 0x%08x\n",
> +			     port, I915_READ(DPLL(0)));

DPLL(crtc->pipe) instead?

> +	}
> +
>  	intel_enable_pipe(dev_priv, pipe, false);
>  	intel_enable_plane(dev_priv, plane, pipe);
>  	if (IS_G4X(dev))
> -- 
> 1.7.10.4
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch