[Intel-gfx] [PATCH] drm/i915/dsi: Enable dsi as part of encoder->enable

[Jani Nikula]

On Mon, 27 Jan 2020, Vandita Kulkarni <vandita.kulkarni at intel.com> wrote:
> Enable the dsi transcoder, panel and backlight as part
> of encoder->enable and not encoder->pre_enable.

That's the *what*, and we can see that much from the patch.

But we need to know *why*, and why you think it was done like this
before, and why it's okay now, etc.

BR,
Jani.

>
> Signed-off-by: Vandita Kulkarni <vandita.kulkarni at intel.com>
> ---
>  drivers/gpu/drm/i915/display/icl_dsi.c | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c
> index 1186a5df057e..d40ee5951168 100644
> --- a/drivers/gpu/drm/i915/display/icl_dsi.c
> +++ b/drivers/gpu/drm/i915/display/icl_dsi.c
> @@ -1086,8 +1086,6 @@ static void gen11_dsi_pre_enable(struct intel_encoder *encoder,
>  				 const struct intel_crtc_state *pipe_config,
>  				 const struct drm_connector_state *conn_state)
>  {
> -	struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
> -
>  	/* step3b */
>  	gen11_dsi_map_pll(encoder, pipe_config);
>  
> @@ -1101,6 +1099,13 @@ static void gen11_dsi_pre_enable(struct intel_encoder *encoder,
>  
>  	/* step6c: configure transcoder timings */
>  	gen11_dsi_set_transcoder_timings(encoder, pipe_config);
> +}
> +
> +static void gen11_dsi_enable(struct intel_encoder *encoder,
> +				 const struct intel_crtc_state *pipe_config,
> +				 const struct drm_connector_state *conn_state)
> +{
> +	struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
>  
>  	/* step6d: enable dsi transcoder */
>  	gen11_dsi_enable_transcoder(encoder);
> @@ -1727,6 +1732,7 @@ void icl_dsi_init(struct drm_i915_private *dev_priv)
>  
>  	encoder->pre_pll_enable = gen11_dsi_pre_pll_enable;
>  	encoder->pre_enable = gen11_dsi_pre_enable;
> +	encoder->enable = gen11_dsi_enable;
>  	encoder->disable = gen11_dsi_disable;
>  	encoder->post_disable = gen11_dsi_post_disable;
>  	encoder->port = port;

-- 
Jani Nikula, Intel Open Source Graphics Center