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From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
To: Vinod Koul <vkoul@kernel.org>, Rob Clark <robdclark@gmail.com>
Cc: linux-arm-msm@vger.kernel.org,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Jonathan Marek <jonathan@marek.ca>,
	Abhinav Kumar <abhinavk@codeaurora.org>,
	linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
	freedreno@lists.freedesktop.org
Subject: Re: [RFC PATCH 11/13] drm/msm/disp/dpu1: Add support for DSC in topology
Date: Fri, 28 May 2021 13:39:29 +0300	[thread overview]
Message-ID: <06ffdec5-8b12-c077-0c51-6ea9100b96a4@linaro.org> (raw)
In-Reply-To: <20210521124946.3617862-16-vkoul@kernel.org>

On 21/05/2021 15:49, Vinod Koul wrote:
> For DSC to work we typically need a 2,2,1 configuration. This should
> suffice for resolutions upto 4k. For more resolutions like 8k this won't
> work.
> 
> Furthermore, we can use 1 DSC encoder in lesser resulutions, but that is
> not power efficient according to Abhinav, so it is recommended to always
> use 2 encoders.

Not power efficient because the second DSC would also be powered on or 
because single DSC enc would consume more power than two DSCs?

> 
> So for now we blindly create 2,2,1 topology when DSC is enabled
> 
> Co-developed-by: Abhinav Kumar <abhinavk@codeaurora.org>
> Signed-off-by: Abhinav Kumar <abhinavk@codeaurora.org>
> Signed-off-by: Vinod Koul <vkoul@kernel.org>
> ---
>   drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 14 ++++++++++++++
>   1 file changed, 14 insertions(+)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> index 18cb1274a8bb..bffb40085c67 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> @@ -609,8 +609,22 @@ static struct msm_display_topology dpu_encoder_get_topology(
>   	topology.num_enc = 0;
>   	topology.num_intf = intf_count;
>   
> +	drm_enc = &dpu_enc->base;
> +	priv = drm_enc->dev->dev_private;
> +	if (priv && priv->dsc) {
> +		/* In case of Display Stream Compression DSC, we would use
> +		 * 2 encoders, 2 line mixers and 1 interface
> +		 * this is power optimal and can drive upto (including) 4k
> +		 * screens
> +		 */
> +		topology.num_enc = 2;
> +		topology.num_intf = 1;
> +		topology.num_lm = 2;
> +	}
> +
>   	return topology;
>   }
> +
>   static int dpu_encoder_virt_atomic_check(
>   		struct drm_encoder *drm_enc,
>   		struct drm_crtc_state *crtc_state,
> 


-- 
With best wishes
Dmitry

WARNING: multiple messages have this Message-ID (diff)
From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
To: Vinod Koul <vkoul@kernel.org>, Rob Clark <robdclark@gmail.com>
Cc: Jonathan Marek <jonathan@marek.ca>,
	David Airlie <airlied@linux.ie>,
	linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
	Abhinav Kumar <abhinavk@codeaurora.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org
Subject: Re: [RFC PATCH 11/13] drm/msm/disp/dpu1: Add support for DSC in topology
Date: Fri, 28 May 2021 13:39:29 +0300	[thread overview]
Message-ID: <06ffdec5-8b12-c077-0c51-6ea9100b96a4@linaro.org> (raw)
In-Reply-To: <20210521124946.3617862-16-vkoul@kernel.org>

On 21/05/2021 15:49, Vinod Koul wrote:
> For DSC to work we typically need a 2,2,1 configuration. This should
> suffice for resolutions upto 4k. For more resolutions like 8k this won't
> work.
> 
> Furthermore, we can use 1 DSC encoder in lesser resulutions, but that is
> not power efficient according to Abhinav, so it is recommended to always
> use 2 encoders.

Not power efficient because the second DSC would also be powered on or 
because single DSC enc would consume more power than two DSCs?

> 
> So for now we blindly create 2,2,1 topology when DSC is enabled
> 
> Co-developed-by: Abhinav Kumar <abhinavk@codeaurora.org>
> Signed-off-by: Abhinav Kumar <abhinavk@codeaurora.org>
> Signed-off-by: Vinod Koul <vkoul@kernel.org>
> ---
>   drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 14 ++++++++++++++
>   1 file changed, 14 insertions(+)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> index 18cb1274a8bb..bffb40085c67 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> @@ -609,8 +609,22 @@ static struct msm_display_topology dpu_encoder_get_topology(
>   	topology.num_enc = 0;
>   	topology.num_intf = intf_count;
>   
> +	drm_enc = &dpu_enc->base;
> +	priv = drm_enc->dev->dev_private;
> +	if (priv && priv->dsc) {
> +		/* In case of Display Stream Compression DSC, we would use
> +		 * 2 encoders, 2 line mixers and 1 interface
> +		 * this is power optimal and can drive upto (including) 4k
> +		 * screens
> +		 */
> +		topology.num_enc = 2;
> +		topology.num_intf = 1;
> +		topology.num_lm = 2;
> +	}
> +
>   	return topology;
>   }
> +
>   static int dpu_encoder_virt_atomic_check(
>   		struct drm_encoder *drm_enc,
>   		struct drm_crtc_state *crtc_state,
> 


-- 
With best wishes
Dmitry

  reply	other threads:[~2021-05-28 10:39 UTC|newest]

Thread overview: 91+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-21 12:49 [RFC PATCH 00/13] drm/msm: Add Display Stream Compression Support Vinod Koul
2021-05-21 12:49 ` Vinod Koul
2021-05-21 12:49 ` [RFC PATCH 01/13] drm/dsc: Add dsc pps header init function Vinod Koul
2021-05-21 12:49   ` Vinod Koul
2021-05-21 15:29   ` Daniel Vetter
2021-05-21 15:29     ` Daniel Vetter
2021-05-24  7:26     ` Vinod Koul
2021-05-21 12:49 ` [RFC PATCH 02/13] dt-bindings: msm/dsi: Document Display Stream Compression (DSC) parameters Vinod Koul
2021-05-21 12:49   ` Vinod Koul
2021-05-21 13:18   ` Rob Herring
2021-05-21 13:18     ` Rob Herring
2021-05-21 13:23     ` Vinod Koul
2021-05-21 13:23       ` Vinod Koul
2021-05-21 14:42   ` Bjorn Andersson
2021-05-21 14:42     ` Bjorn Andersson
2021-05-24  7:30     ` Vinod Koul
2021-05-24  7:30       ` Vinod Koul
2021-05-24 15:08       ` Bjorn Andersson
2021-05-24 15:08         ` Bjorn Andersson
2021-05-26  5:32         ` Vinod Koul
2021-05-26  5:32           ` Vinod Koul
2021-05-21 12:49 ` [RFC PATCH 03/13] drm/msm/disp/dpu1: Add support for DSC Vinod Koul
2021-05-21 12:49   ` Vinod Koul
2021-05-27 23:49   ` Dmitry Baryshkov
2021-05-27 23:49     ` Dmitry Baryshkov
2021-05-21 12:49 ` [RFC PATCH 03/13] drm/msm/dsi: add support for dsc data Vinod Koul
2021-05-21 12:49   ` Vinod Koul
2021-05-27 23:45   ` Dmitry Baryshkov
2021-05-27 23:45     ` Dmitry Baryshkov
2021-06-02 11:06     ` Vinod Koul
2021-06-02 11:06       ` Vinod Koul
2021-05-28 10:29   ` Dmitry Baryshkov
2021-05-28 10:29     ` Dmitry Baryshkov
2021-06-02 11:17     ` Vinod Koul
2021-06-02 11:17       ` Vinod Koul
2021-05-21 12:49 ` [RFC PATCH 04/13] drm/msm/disp/dpu1: Add support for DSC in pingpong block Vinod Koul
2021-05-21 12:49   ` Vinod Koul
2021-05-21 12:49 ` [RFC PATCH 04/13] drm/msm/disp/dpu1: Add support for DSC Vinod Koul
2021-05-21 12:49   ` Vinod Koul
2021-05-28 10:31   ` Dmitry Baryshkov
2021-05-28 10:31     ` Dmitry Baryshkov
2021-05-21 12:49 ` [RFC PATCH 05/13] drm/msm/disp/dpu1: Add support for DSC in pingpong block Vinod Koul
2021-05-21 12:49   ` Vinod Koul
2021-05-21 12:49 ` [RFC PATCH 05/13] drm/msm/dsi: add support for dsc data Vinod Koul
2021-05-21 12:49   ` Vinod Koul
2021-05-21 12:49 ` [RFC PATCH 06/13] drm/msm/disp/dpu1: Add DSC support in RM Vinod Koul
2021-05-21 12:49   ` Vinod Koul
2021-05-28 10:33   ` Dmitry Baryshkov
2021-05-28 10:33     ` Dmitry Baryshkov
2021-05-21 12:49 ` [RFC PATCH 07/13] drm/msm/disp/dpu1: Add DSC for SDM845 to hw_catalog Vinod Koul
2021-05-21 12:49   ` Vinod Koul
2021-05-21 12:49 ` [RFC PATCH 08/13] drm/msm/disp/dpu1: Add DSC support in hw_ctl Vinod Koul
2021-05-21 12:49   ` Vinod Koul
2021-05-21 12:49 ` [RFC PATCH 09/13] drm/msm/disp/dpu1: Don't use DSC with mode_3d Vinod Koul
2021-05-21 12:49   ` Vinod Koul
2021-05-28 10:36   ` Dmitry Baryshkov
2021-05-28 10:36     ` Dmitry Baryshkov
2021-05-21 12:49 ` [RFC PATCH 09/13] drm/msm/disp/dpu1: Dont " Vinod Koul
2021-05-21 12:49   ` Vinod Koul
2021-05-21 12:49 ` [RFC PATCH 10/13] drm/msm/disp/dpu1: Add support for DSC in encoder Vinod Koul
2021-05-21 12:49   ` Vinod Koul
2021-05-21 12:49 ` [RFC PATCH 11/13] drm/msm/disp/dpu1: Add support for DSC in topology Vinod Koul
2021-05-21 12:49   ` Vinod Koul
2021-05-28 10:39   ` Dmitry Baryshkov [this message]
2021-05-28 10:39     ` Dmitry Baryshkov
2021-05-28 22:23     ` abhinavk
2021-05-28 22:23       ` abhinavk
2021-05-28 22:29       ` Dmitry Baryshkov
2021-05-28 22:29         ` Dmitry Baryshkov
2021-05-21 12:49 ` [RFC PATCH 12/13] drm/msm/dsi: Add support for DSC configuration Vinod Koul
2021-05-21 12:49   ` Vinod Koul
2021-05-21 12:49 ` [RFC PATCH 13/13] drm/msm/dsi: Pass DSC params to drm_panel Vinod Koul
2021-05-21 12:49   ` Vinod Koul
2021-05-21 14:09 ` [Freedreno] [RFC PATCH 00/13] drm/msm: Add Display Stream Compression Support Jeffrey Hugo
2021-05-21 14:09   ` Jeffrey Hugo
2021-05-26  5:46   ` Vinod Koul
2021-05-26  5:46     ` Vinod Koul
2021-05-26 15:00     ` Jeffrey Hugo
2021-05-26 15:00       ` Jeffrey Hugo
2021-05-27 23:30       ` Rob Clark
2021-05-27 23:30         ` Rob Clark
2021-06-02 11:01         ` Vinod Koul
2021-06-02 11:01           ` Vinod Koul
2021-06-03 23:40           ` abhinavk
2021-06-03 23:40             ` abhinavk
2021-06-17  8:06             ` Vinod Koul
2021-06-17  8:06               ` Vinod Koul
2021-06-04  2:36           ` Rob Clark
2021-06-04  2:36             ` Rob Clark
2021-06-02 10:56       ` Vinod Koul
2021-06-02 10:56         ` Vinod Koul

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