Re: [Intel-xe] [Intel-gfx] [PATCH v2 11/15] drm/i915: Initialize dkl_phy spin lock from display code path

[Rodrigo Vivi <rodrigo.vivi@kernel.org>]

On Tue, Apr 25, 2023 at 12:26:20PM -0700, José Roberto de Souza wrote:
> drm/i915: Initialize dkl_phy spin lock from display code path

double subject!

but I realized that this ended up in drm-intel-next like this as well
so I kept in here as well...

> 
> Start moving the initialization of display locks from
> i915_driver_early_probe().
> Display locks should be initialized from display-only code paths.
> 
> It was also agreed that if a variable is only used in one file, it
> should be initialized only in that file, so intel_dkl_phy_init() was
> added.
> 
> v2:
> - added intel_display_locks_init()
> 
> v3:
> - rebased
> 
> v4:
> - dropped intel_display_locks_init()
> 
> v5:
> - moved intel_dkl_phy_init() to the beginning of file
> 
> Cc: intel-gfx@lists.freedesktop.org
> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Cc: Jani Nikula <jani.nikula@intel.com>
> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
> Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
> Link: https://patchwork.freedesktop.org/patch/msgid/20230420170558.35398-1-jose.souza@intel.com
> (cherry picked from commit bfa010f608491036327db20aad1d15e28da0189e)
> ---
>  drivers/gpu/drm/i915/display/intel_display_driver.c | 2 ++
>  drivers/gpu/drm/i915/display/intel_dkl_phy.c        | 9 +++++++++
>  drivers/gpu/drm/i915/display/intel_dkl_phy.h        | 1 +
>  drivers/gpu/drm/i915/i915_driver.c                  | 1 -
>  4 files changed, 12 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_display_driver.c b/drivers/gpu/drm/i915/display/intel_display_driver.c
> index 92c624f6d2ae7..95669ad1a7975 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_driver.c
> +++ b/drivers/gpu/drm/i915/display/intel_display_driver.c
> @@ -30,6 +30,7 @@
>  #include "intel_display_driver.h"
>  #include "intel_display_power.h"
>  #include "intel_display_types.h"
> +#include "intel_dkl_phy.h"
>  #include "intel_dmc.h"
>  #include "intel_dp.h"
>  #include "intel_dpll.h"
> @@ -177,6 +178,7 @@ void intel_display_driver_early_probe(struct drm_i915_private *i915)
>  	if (!HAS_DISPLAY(i915))
>  		return;
>  
> +	intel_dkl_phy_init(i915);
>  	intel_color_init_hooks(i915);
>  	intel_init_cdclk_hooks(i915);
>  	intel_audio_hooks_init(i915);
> diff --git a/drivers/gpu/drm/i915/display/intel_dkl_phy.c b/drivers/gpu/drm/i915/display/intel_dkl_phy.c
> index 57cc3edba0163..a001232ad445e 100644
> --- a/drivers/gpu/drm/i915/display/intel_dkl_phy.c
> +++ b/drivers/gpu/drm/i915/display/intel_dkl_phy.c
> @@ -11,6 +11,15 @@
>  #include "intel_dkl_phy.h"
>  #include "intel_dkl_phy_regs.h"
>  
> +/**
> + * intel_dkl_phy_init - initialize Dekel PHY
> + * @i915: i915 device instance
> + */
> +void intel_dkl_phy_init(struct drm_i915_private *i915)
> +{
> +	spin_lock_init(&i915->display.dkl.phy_lock);
> +}
> +
>  static void
>  dkl_phy_set_hip_idx(struct drm_i915_private *i915, struct intel_dkl_phy_reg reg)
>  {
> diff --git a/drivers/gpu/drm/i915/display/intel_dkl_phy.h b/drivers/gpu/drm/i915/display/intel_dkl_phy.h
> index 570ee36f9386f..5956ec3e940b1 100644
> --- a/drivers/gpu/drm/i915/display/intel_dkl_phy.h
> +++ b/drivers/gpu/drm/i915/display/intel_dkl_phy.h
> @@ -12,6 +12,7 @@
>  
>  struct drm_i915_private;
>  
> +void intel_dkl_phy_init(struct drm_i915_private *i915);
>  u32
>  intel_dkl_phy_read(struct drm_i915_private *i915, struct intel_dkl_phy_reg reg);
>  void
> diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c
> index decaff25c36cf..a4e11a3c1842f 100644
> --- a/drivers/gpu/drm/i915/i915_driver.c
> +++ b/drivers/gpu/drm/i915/i915_driver.c
> @@ -225,7 +225,6 @@ static int i915_driver_early_probe(struct drm_i915_private *dev_priv)
>  	mutex_init(&dev_priv->display.wm.wm_mutex);
>  	mutex_init(&dev_priv->display.pps.mutex);
>  	mutex_init(&dev_priv->display.hdcp.comp_mutex);
> -	spin_lock_init(&dev_priv->display.dkl.phy_lock);
>  
>  	i915_memcpy_init_early(dev_priv);
>  	intel_runtime_pm_init_early(&dev_priv->runtime_pm);
> -- 
> 2.40.0
>