linux-kernel - Re: [PATCH] drm/i915/display: Convert i9xx_pipe_crc_auto

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Message-ID: <Y8d42OYWpW03zdAi@ubun2204.myguest.virtualbox.org>
Date:   Wed, 18 Jan 2023 10:13:04 +0530
From:   Deepak R Varma <drv@...lo.com>
To:     Rodrigo Vivi <rodrigo.vivi@...el.com>
Cc:     Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org,
        Praveen Kumar <kumarpraveen@...ux.microsoft.com>,
        Saurabh Singh Sengar <ssengar@...rosoft.com>
Subject: Re: [PATCH] drm/i915/display: Convert i9xx_pipe_crc_auto_source to
 void

On Tue, Jan 17, 2023 at 02:21:59PM -0500, Rodrigo Vivi wrote:
> On Sat, Jan 14, 2023 at 07:33:53PM +0530, Deepak R Varma wrote:
> > Convert function i9xx_pipe_crc_auto_source() to return void instead
> > of int since the current implementation always returns 0 to the caller.
> > Issue identified using returnvar Coccinelle semantic patch.
> 
> could you please share the coccinelle commands and files you used here?

Hello Rodrigo,
I used following command to identify this change opportunity:

make coccicheck COCCI=scripts/coccinelle/misc/returnvar.cocci M=drivers/gpu/drm/

Let me know if you would like me to include the same in the commit message.

> 
> > 
> > Signed-off-by: Deepak R Varma <drv@...lo.com>
> > ---
> > Please note: The change is compile tested only.
> 
> np, our CI liked it.
> 
> I liked the clean up as well:
> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@...el.com>

Thank you for your review and the feedback.

Regards,
./drv

> 
> > 
> > 
> >  drivers/gpu/drm/i915/display/intel_pipe_crc.c | 23 ++++++-------------
> >  1 file changed, 7 insertions(+), 16 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/display/intel_pipe_crc.c b/drivers/gpu/drm/i915/display/intel_pipe_crc.c
> > index e9774670e3f6..8d3ea8d7b737 100644
> > --- a/drivers/gpu/drm/i915/display/intel_pipe_crc.c
> > +++ b/drivers/gpu/drm/i915/display/intel_pipe_crc.c
> > @@ -72,14 +72,13 @@ static int i8xx_pipe_crc_ctl_reg(enum intel_pipe_crc_source *source,
> >  	return 0;
> >  }
> >  
> > -static int i9xx_pipe_crc_auto_source(struct drm_i915_private *dev_priv,
> > -				     enum pipe pipe,
> > -				     enum intel_pipe_crc_source *source)
> > +static void i9xx_pipe_crc_auto_source(struct drm_i915_private *dev_priv,
> > +				      enum pipe pipe,
> > +				      enum intel_pipe_crc_source *source)
> >  {
> >  	struct intel_encoder *encoder;
> >  	struct intel_crtc *crtc;
> >  	struct intel_digital_port *dig_port;
> > -	int ret = 0;
> >  
> >  	*source = INTEL_PIPE_CRC_SOURCE_PIPE;
> >  
> > @@ -121,8 +120,6 @@ static int i9xx_pipe_crc_auto_source(struct drm_i915_private *dev_priv,
> >  		}
> >  	}
> >  	drm_modeset_unlock_all(&dev_priv->drm);
> > -
> > -	return ret;
> >  }
> >  
> >  static int vlv_pipe_crc_ctl_reg(struct drm_i915_private *dev_priv,
> > @@ -132,11 +129,8 @@ static int vlv_pipe_crc_ctl_reg(struct drm_i915_private *dev_priv,
> >  {
> >  	bool need_stable_symbols = false;
> >  
> > -	if (*source == INTEL_PIPE_CRC_SOURCE_AUTO) {
> > -		int ret = i9xx_pipe_crc_auto_source(dev_priv, pipe, source);
> > -		if (ret)
> > -			return ret;
> > -	}
> > +	if (*source == INTEL_PIPE_CRC_SOURCE_AUTO)
> > +		i9xx_pipe_crc_auto_source(dev_priv, pipe, source);
> >  
> >  	switch (*source) {
> >  	case INTEL_PIPE_CRC_SOURCE_PIPE:
> > @@ -200,11 +194,8 @@ static int i9xx_pipe_crc_ctl_reg(struct drm_i915_private *dev_priv,
> >  				 enum intel_pipe_crc_source *source,
> >  				 u32 *val)
> >  {
> > -	if (*source == INTEL_PIPE_CRC_SOURCE_AUTO) {
> > -		int ret = i9xx_pipe_crc_auto_source(dev_priv, pipe, source);
> > -		if (ret)
> > -			return ret;
> > -	}
> > +	if (*source == INTEL_PIPE_CRC_SOURCE_AUTO)
> > +		i9xx_pipe_crc_auto_source(dev_priv, pipe, source);
> >  
> >  	switch (*source) {
> >  	case INTEL_PIPE_CRC_SOURCE_PIPE:
> > -- 
> > 2.34.1
> > 
> > 
> >