linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
To: Bjorn Andersson <bjorn.andersson@linaro.org>,
	Rob Clark <robdclark@gmail.com>, Sean Paul <sean@poorly.run>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Abhinav Kumar <abhinavk@codeaurora.org>,
	Kalyan Thota <kalyan_t@codeaurora.org>,
	Kuogee Hsieh <khsieh@codeaurora.org>
Cc: Rob Herring <robh+dt@kernel.org>,
	Stephen Boyd <swboyd@chromium.org>,
	linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org,
	freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/5] drm/msm/dp: Modify prototype of encoder based API
Date: Tue, 27 Jul 2021 21:42:34 +0300	[thread overview]
Message-ID: <97ac00f8-eb25-9142-3bdc-904aad269b6e@linaro.org> (raw)
In-Reply-To: <20210725042436.3967173-3-bjorn.andersson@linaro.org>

On 25/07/2021 07:24, Bjorn Andersson wrote:
> Functions in the DisplayPort code that relates to individual instances
> (encoders) are passed both the struct msm_dp and the struct drm_encoder. But
> in a situation where multiple DP instances would exist this means that
> the caller need to resolve which struct msm_dp relates to the struct
> drm_encoder at hand.
> 
> The information for doing this lookup is available inside the DP driver,
> so update the API to take the struct msm_drm_private and the struct
> drm_encoder and have the DP code figure out which struct msm_dp the
> operation relates to.

Initially I thought to propose moving encoder->dp lookup into dpu code 
by adding msm_dp_display_get_encoder() function. However as I was 
writing that, I remembered that at some point I had to refactor my own 
patchset in the way to get rid of calling msm_FOO_get_encoder().

I'd propose simpler solution. In dpu_encoder_setup() you have the DP 
index and the encoder. So you can store valid msm_dp pointer in the 
dpu_encoder_virt and remove all the lookups. Then you can replace all 
priv->dp with bare dpu_enc->dp accesses. Will this work for you?

> 
> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
> ---
>   drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 17 +++++----
>   drivers/gpu/drm/msm/dp/dp_display.c         | 38 +++++++++++++++++----
>   drivers/gpu/drm/msm/msm_drv.h               | 31 +++++++++--------
>   3 files changed, 56 insertions(+), 30 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> index 1c04b7cce43e..0d64ef0819af 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> @@ -1002,8 +1002,8 @@ static void dpu_encoder_virt_mode_set(struct drm_encoder *drm_enc,
>   
>   	trace_dpu_enc_mode_set(DRMID(drm_enc));
>   
> -	if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS && priv->dp)
> -		msm_dp_display_mode_set(priv->dp, drm_enc, mode, adj_mode);
> +	if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS)
> +		msm_dp_display_mode_set(priv, drm_enc, mode, adj_mode);
>   
>   	list_for_each_entry(conn_iter, connector_list, head)
>   		if (conn_iter->encoder == drm_enc)
> @@ -1184,9 +1184,8 @@ static void dpu_encoder_virt_enable(struct drm_encoder *drm_enc)
>   
>   	_dpu_encoder_virt_enable_helper(drm_enc);
>   
> -	if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS && priv->dp) {
> -		ret = msm_dp_display_enable(priv->dp,
> -						drm_enc);
> +	if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS) {
> +		ret = msm_dp_display_enable(priv, drm_enc);
>   		if (ret) {
>   			DPU_ERROR_ENC(dpu_enc, "dp display enable failed: %d\n",
>   				ret);
> @@ -1226,8 +1225,8 @@ static void dpu_encoder_virt_disable(struct drm_encoder *drm_enc)
>   	/* wait for idle */
>   	dpu_encoder_wait_for_event(drm_enc, MSM_ENC_TX_COMPLETE);
>   
> -	if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS && priv->dp) {
> -		if (msm_dp_display_pre_disable(priv->dp, drm_enc))
> +	if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS) {
> +		if (msm_dp_display_pre_disable(priv, drm_enc))
>   			DPU_ERROR_ENC(dpu_enc, "dp display push idle failed\n");
>   	}
>   
> @@ -1255,8 +1254,8 @@ static void dpu_encoder_virt_disable(struct drm_encoder *drm_enc)
>   
>   	DPU_DEBUG_ENC(dpu_enc, "encoder disabled\n");
>   
> -	if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS && priv->dp) {
> -		if (msm_dp_display_disable(priv->dp, drm_enc))
> +	if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS) {
> +		if (msm_dp_display_disable(priv, drm_enc))
>   			DPU_ERROR_ENC(dpu_enc, "dp display disable failed\n");
>   	}
>   
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
> index 8696b36d30e4..59ffd6c8f41f 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> @@ -1432,12 +1432,25 @@ int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
>   	return 0;
>   }
>   
> -int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder)
> +static struct msm_dp *msm_dp_from_drm_encoder(struct msm_drm_private *priv,
> +					      struct drm_encoder *encoder)
> +{
> +	if (priv->dp && priv->dp->encoder == encoder)
> +		return priv->dp;
> +
> +	return NULL;
> +}
> +
> +int msm_dp_display_enable(struct msm_drm_private *priv, struct drm_encoder *encoder)
>   {
>   	int rc = 0;
>   	struct dp_display_private *dp_display;
> +	struct msm_dp *dp = msm_dp_from_drm_encoder(priv, encoder);
>   	u32 state;
>   
> +	if (!dp)
> +		return -EINVAL;
> +
>   	dp_display = container_of(dp, struct dp_display_private, dp_display);
>   	if (!dp_display->dp_mode.drm_mode.clock) {
>   		DRM_ERROR("invalid params\n");
> @@ -1489,9 +1502,13 @@ int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder)
>   	return rc;
>   }
>   
> -int msm_dp_display_pre_disable(struct msm_dp *dp, struct drm_encoder *encoder)
> +int msm_dp_display_pre_disable(struct msm_drm_private *priv, struct drm_encoder *encoder)
>   {
>   	struct dp_display_private *dp_display;
> +	struct msm_dp *dp = msm_dp_from_drm_encoder(priv, encoder);
> +
> +	if (!dp)
> +		return 0;
>   
>   	dp_display = container_of(dp, struct dp_display_private, dp_display);
>   
> @@ -1500,11 +1517,15 @@ int msm_dp_display_pre_disable(struct msm_dp *dp, struct drm_encoder *encoder)
>   	return 0;
>   }
>   
> -int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder)
> +int msm_dp_display_disable(struct msm_drm_private *priv, struct drm_encoder *encoder)
>   {
>   	int rc = 0;
>   	u32 state;
>   	struct dp_display_private *dp_display;
> +	struct msm_dp *dp = msm_dp_from_drm_encoder(priv, encoder);
> +
> +	if (!dp)
> +		return 0;
>   
>   	dp_display = container_of(dp, struct dp_display_private, dp_display);
>   
> @@ -1531,11 +1552,16 @@ int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder)
>   	return rc;
>   }
>   
> -void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder,
> -				struct drm_display_mode *mode,
> -				struct drm_display_mode *adjusted_mode)
> +void msm_dp_display_mode_set(struct msm_drm_private *priv,
> +			     struct drm_encoder *encoder,
> +			     struct drm_display_mode *mode,
> +			     struct drm_display_mode *adjusted_mode)
>   {
>   	struct dp_display_private *dp_display;
> +	struct msm_dp *dp = msm_dp_from_drm_encoder(priv, encoder);
> +
> +	if (!dp)
> +		return;
>   
>   	dp_display = container_of(dp, struct dp_display_private, dp_display);
>   
> diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
> index 9bfd37855969..e9232032b266 100644
> --- a/drivers/gpu/drm/msm/msm_drv.h
> +++ b/drivers/gpu/drm/msm/msm_drv.h
> @@ -388,12 +388,13 @@ int __init msm_dp_register(void);
>   void __exit msm_dp_unregister(void);
>   int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
>   			 struct drm_encoder *encoder);
> -int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder);
> -int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder);
> -int msm_dp_display_pre_disable(struct msm_dp *dp, struct drm_encoder *encoder);
> -void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder,
> -				struct drm_display_mode *mode,
> -				struct drm_display_mode *adjusted_mode);
> +int msm_dp_display_enable(struct msm_drm_private *priv, struct drm_encoder *encoder);
> +int msm_dp_display_disable(struct msm_drm_private *priv, struct drm_encoder *encoder);
> +int msm_dp_display_pre_disable(struct msm_drm_private *priv, struct drm_encoder *encoder);
> +void msm_dp_display_mode_set(struct msm_drm_private *priv,
> +			     struct drm_encoder *encoder,
> +			     struct drm_display_mode *mode,
> +			     struct drm_display_mode *adjusted_mode);
>   void msm_dp_irq_postinstall(struct msm_dp *dp_display);
>   void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp_display);
>   
> @@ -413,25 +414,25 @@ static inline int msm_dp_modeset_init(struct msm_dp *dp_display,
>   {
>   	return -EINVAL;
>   }
> -static inline int msm_dp_display_enable(struct msm_dp *dp,
> +static inline int msm_dp_display_enable(struct msm_drm_private *priv,
>   					struct drm_encoder *encoder)
>   {
>   	return -EINVAL;
>   }
> -static inline int msm_dp_display_disable(struct msm_dp *dp,
> -					struct drm_encoder *encoder)
> +static inline int msm_dp_display_disable(struct msm_drm_private *priv,
> +					 struct drm_encoder *encoder)
>   {
>   	return -EINVAL;
>   }
> -static inline int msm_dp_display_pre_disable(struct msm_dp *dp,
> -					struct drm_encoder *encoder)
> +static inline int msm_dp_display_pre_disable(struct msm_drm_private *priv,
> +					     struct drm_encoder *encoder)
>   {
>   	return -EINVAL;
>   }
> -static inline void msm_dp_display_mode_set(struct msm_dp *dp,
> -				struct drm_encoder *encoder,
> -				struct drm_display_mode *mode,
> -				struct drm_display_mode *adjusted_mode)
> +static inline void msm_dp_display_mode_set(struct msm_drm_private *priv,
> +					   struct drm_encoder *encoder,
> +					   struct drm_display_mode *mode,
> +					   struct drm_display_mode *adjusted_mode)
>   {
>   }
>   
> 


-- 
With best wishes
Dmitry

  parent reply	other threads:[~2021-07-27 18:42 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-25  4:24 [PATCH 0/5] drm/msm/dp: Support multiple DP instances and add sc8180x Bjorn Andersson
2021-07-25  4:24 ` [PATCH 1/5] drm/msm/dp: Remove global g_dp_display variable Bjorn Andersson
2021-07-26 23:11   ` Stephen Boyd
2021-07-27 18:15   ` Dmitry Baryshkov
2021-07-30 23:37   ` [Freedreno] " abhinavk
2021-07-25  4:24 ` [PATCH 2/5] drm/msm/dp: Modify prototype of encoder based API Bjorn Andersson
2021-07-26 23:55   ` Stephen Boyd
2021-07-27 18:42   ` Dmitry Baryshkov [this message]
2021-07-25  4:24 ` [PATCH 3/5] drm/msm/dp: Support up to 3 DP controllers Bjorn Andersson
2021-07-26 23:51   ` Stephen Boyd
2021-07-25  4:24 ` [PATCH 4/4] drm/msm/dp: Add sc8180x " Bjorn Andersson
2021-07-25  4:24 ` [PATCH 4/5] dt-bindings: msm/dp: Add SC8180x compatibles Bjorn Andersson
2021-07-26 23:52   ` Stephen Boyd
2021-07-25  4:24 ` [PATCH 5/5] drm/msm/dp: Add sc8180x DP controllers Bjorn Andersson
2021-07-26 23:54   ` Stephen Boyd
2021-07-31  1:21 ` [PATCH 0/5] drm/msm/dp: Support multiple DP instances and add sc8180x abhinavk

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=97ac00f8-eb25-9142-3bdc-904aad269b6e@linaro.org \
    --to=dmitry.baryshkov@linaro.org \
    --cc=abhinavk@codeaurora.org \
    --cc=airlied@linux.ie \
    --cc=bjorn.andersson@linaro.org \
    --cc=daniel@ffwll.ch \
    --cc=dri-devel@lists.freedesktop.org \
    --cc=freedreno@lists.freedesktop.org \
    --cc=kalyan_t@codeaurora.org \
    --cc=khsieh@codeaurora.org \
    --cc=linux-arm-msm@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=robdclark@gmail.com \
    --cc=robh+dt@kernel.org \
    --cc=sean@poorly.run \
    --cc=swboyd@chromium.org \
    --subject='Re: [PATCH 2/5] drm/msm/dp: Modify prototype of encoder based API' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).