[Intel-gfx] [PATCH 05/10] drm/i915: Dual link needs Shutdown and Turn on packet for both ports

[Jani Nikula]

On Thu, 04 Dec 2014, Gaurav K Singh <gaurav.k.singh at intel.com> wrote:
> For dual link MIPI panels, SHUTDOWN packet needs to send to both Ports
> A & C during MIPI encoder disabling sequence. Similarly, TURN ON packet
> to be sent to both Ports during MIPI encoder enabling sequence.
>
> v2: Address review comments by Jani
>     - Used a for loop instead of do-while loop.
>
> v3: Used for_each_dsi_port macro instead of for loop
>
> Signed-off-by: Gaurav K Singh <gaurav.k.singh at intel.com>
> Signed-off-by: Shobhit Kumar <shobhit.kumar at intel.com>

Reviewed-by: Jani Nikula <jani.nikula at intel.com>


> ---
>  drivers/gpu/drm/i915/intel_dsi_cmd.c |   26 +++++++++++++++-----------
>  1 file changed, 15 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_dsi_cmd.c b/drivers/gpu/drm/i915/intel_dsi_cmd.c
> index 8e30684..562811c 100644
> --- a/drivers/gpu/drm/i915/intel_dsi_cmd.c
> +++ b/drivers/gpu/drm/i915/intel_dsi_cmd.c
> @@ -385,8 +385,7 @@ int dpi_send_cmd(struct intel_dsi *intel_dsi, u32 cmd, bool hs)
>  	struct drm_encoder *encoder = &intel_dsi->base.base;
>  	struct drm_device *dev = encoder->dev;
>  	struct drm_i915_private *dev_priv = dev->dev_private;
> -	struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
> -	enum port port = intel_dsi_pipe_to_port(intel_crtc->pipe);
> +	enum port port;
>  	u32 mask;
>  
>  	/* XXX: pipe, hs */
> @@ -395,18 +394,23 @@ int dpi_send_cmd(struct intel_dsi *intel_dsi, u32 cmd, bool hs)
>  	else
>  		cmd |= DPI_LP_MODE;
>  
> -	/* clear bit */
> -	I915_WRITE(MIPI_INTR_STAT(port), SPL_PKT_SENT_INTERRUPT);
> +	for_each_dsi_port(port, intel_dsi->ports) {
> +		/* clear bit */
> +		I915_WRITE(MIPI_INTR_STAT(port), SPL_PKT_SENT_INTERRUPT);
>  
> -	/* XXX: old code skips write if control unchanged */
> -	if (cmd == I915_READ(MIPI_DPI_CONTROL(port)))
> -		DRM_ERROR("Same special packet %02x twice in a row.\n", cmd);
> +		/* XXX: old code skips write if control unchanged */
> +		if (cmd == I915_READ(MIPI_DPI_CONTROL(port)))
> +			DRM_ERROR("Same special packet %02x twice in a row.\n",
> +									cmd);
>  
> -	I915_WRITE(MIPI_DPI_CONTROL(port), cmd);
> +		I915_WRITE(MIPI_DPI_CONTROL(port), cmd);
>  
> -	mask = SPL_PKT_SENT_INTERRUPT;
> -	if (wait_for((I915_READ(MIPI_INTR_STAT(port)) & mask) == mask, 100))
> -		DRM_ERROR("Video mode command 0x%08x send failed.\n", cmd);
> +		mask = SPL_PKT_SENT_INTERRUPT;
> +		if (wait_for((I915_READ(MIPI_INTR_STAT(port)) & mask) == mask,
> +									100))
> +			DRM_ERROR("Video mode command 0x%08x send failed.\n",
> +									cmd);
> +	}
>  
>  	return 0;
>  }
> -- 
> 1.7.9.5
>
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-- 
Jani Nikula, Intel Open Source Technology Center