[Intel-gfx] [V6 4/9] drm/i915/dsi: Add check for periodic command mode

[Jani Nikula]

On Thu, 09 Jan 2020, Vandita Kulkarni <vandita.kulkarni at intel.com> wrote:
> If the GOP has programmed periodic command mode,
> we need to disable that which would need a
> deconfigure and configure sequence.
>
> Signed-off-by: Vandita Kulkarni <vandita.kulkarni at intel.com>
> ---
>  drivers/gpu/drm/i915/display/icl_dsi.c | 23 +++++++++++++++++++++++
>  1 file changed, 23 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c
> index 66dc8be672b8..3ad8cedb5211 100644
> --- a/drivers/gpu/drm/i915/display/icl_dsi.c
> +++ b/drivers/gpu/drm/i915/display/icl_dsi.c
> @@ -1378,6 +1378,21 @@ static void gen11_dsi_get_timings(struct intel_encoder *encoder,
>  	adjusted_mode->crtc_vblank_end = adjusted_mode->crtc_vtotal;
>  }
>  
> +bool gen11_dsi_is_periodic_cmd_mode(struct drm_i915_private *dev_priv,
> +				    struct intel_dsi *intel_dsi)

Should be static (see sparse results). Please only pass intel_dsi, you
can get at dev_priv through that.

> +{
> +	u32 val;
> +	enum transcoder dsi_trans;
> +
> +	if (intel_dsi->ports == BIT(PORT_B))
> +		dsi_trans = TRANSCODER_DSI_1;
> +	else
> +		dsi_trans = TRANSCODER_DSI_0;
> +
> +	val = I915_READ(DSI_TRANS_FUNC_CONF(dsi_trans));
> +	return (val & DSI_PERIODIC_FRAME_UPDATE_ENABLE);
> +}
> +
>  static void gen11_dsi_get_config(struct intel_encoder *encoder,
>  				 struct intel_crtc_state *pipe_config)
>  {
> @@ -1398,6 +1413,10 @@ static void gen11_dsi_get_config(struct intel_encoder *encoder,
>  	gen11_dsi_get_timings(encoder, pipe_config);
>  	pipe_config->output_types |= BIT(INTEL_OUTPUT_DSI);
>  	pipe_config->pipe_bpp = bdw_get_pipemisc_bpp(crtc);
> +
> +	if (gen11_dsi_is_periodic_cmd_mode(dev_priv, intel_dsi))
> +		pipe_config->hw.adjusted_mode.private_flags |=
> +					I915_MODE_FLAG_DSI_PERIODIC_CMD_MODE;
>  }
>  
>  static int gen11_dsi_dsc_compute_config(struct intel_encoder *encoder,
> @@ -1479,6 +1498,10 @@ static int gen11_dsi_compute_config(struct intel_encoder *encoder,
>  
>  	pipe_config->port_clock = afe_clk(encoder, pipe_config) / 5;
>  
> +	/* We would not opereate in peridoc command mode */

Spelling.

Other than that,

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


> +	pipe_config->hw.adjusted_mode.private_flags &=
> +					~I915_MODE_FLAG_DSI_PERIODIC_CMD_MODE;
> +
>  	return 0;
>  }

-- 
Jani Nikula, Intel Open Source Graphics Center