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>,
Jeffrey Hugo <jeffrey.l.hugo@gmail.com>,
Sumit Semwal <sumit.semwal@linaro.org>,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
freedreno@lists.freedesktop.org
Subject: Re: [PATCH v2 09/11] drm/msm/disp/dpu1: Add support for DSC in topology
Date: Mon, 25 Oct 2021 17:37:30 +0300 [thread overview]
Message-ID: <7ba115c8-16e6-54c4-b151-e69eedcb47d2@linaro.org> (raw)
In-Reply-To: <020ab810-c975-d58b-a572-57eb3010d6c0@linaro.org>
On 14/10/2021 17:13, Dmitry Baryshkov wrote:
> On 07/10/2021 10:08, 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.
>>
>> Also, it is better to use 2 LMs and DSC instances as half width results
>> in lesser power consumption as compared to single LM, DSC at full width.
>>
>> The panel has been tested only with 2,2,1 configuration, 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>
>> ---
>> Changes since
>> RFC:
>> - Add more details in changelog
>>
>> drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 16 ++++++++++++++++
>> 1 file changed, 16 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>> index aac51c1bdf94..70f57a071165 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>> @@ -538,6 +538,8 @@ static struct msm_display_topology
>> dpu_encoder_get_topology(
>> struct drm_display_mode *mode)
>> {
>> struct msm_display_topology topology = {0};
>> + struct drm_encoder *drm_enc;
>> + struct msm_drm_private *priv;
>> int i, intf_count = 0;
>> for (i = 0; i < MAX_PHYS_ENCODERS_PER_VIRTUAL; i++)
>> @@ -572,8 +574,22 @@ 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;
>
> So, here you'd set the topology.num_rm.
I meant 'num_dsc', please excuse the typo.
>
>> + }
>> +
>> return topology;
>> }
>> +
>> static int dpu_encoder_virt_atomic_check(
>> struct drm_encoder *drm_enc,
>> struct drm_crtc_state *crtc_state,
>>
>
>
--
With best wishes
Dmitry
next prev parent reply other threads:[~2021-10-25 14:37 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-07 7:08 [PATCH v2 00/11] drm/msm: Add Display Stream Compression Support Vinod Koul
2021-10-07 7:08 ` [PATCH v2 01/11] drm/msm/dsi: add support for dsc data Vinod Koul
2021-10-25 14:43 ` Dmitry Baryshkov
2021-10-07 7:08 ` [PATCH v2 02/11] drm/msm/disp/dpu1: Add support for DSC Vinod Koul
2021-10-14 14:40 ` Dmitry Baryshkov
2021-10-19 14:07 ` Vinod Koul
2021-10-07 7:08 ` [PATCH v2 03/11] drm/msm/disp/dpu1: Add support for DSC in pingpong block Vinod Koul
2021-10-14 13:30 ` Dmitry Baryshkov
2021-10-07 7:08 ` [PATCH v2 04/11] drm/msm/disp/dpu1: Add DSC support in RM Vinod Koul
2021-10-14 14:11 ` Dmitry Baryshkov
2021-10-19 15:30 ` Vinod Koul
2021-10-19 15:52 ` Dmitry Baryshkov
2021-10-19 16:25 ` Vinod Koul
2021-10-07 7:08 ` [PATCH v2 05/11] drm/msm/disp/dpu1: Add DSC for SDM845 to hw_catalog Vinod Koul
2021-10-14 13:33 ` Dmitry Baryshkov
2021-10-07 7:08 ` [PATCH v2 06/11] drm/msm/disp/dpu1: Don't use DSC with mode_3d Vinod Koul
2021-10-14 13:41 ` Dmitry Baryshkov
2021-10-14 13:50 ` Dmitry Baryshkov
2021-10-20 6:57 ` Vinod Koul
2021-10-25 14:40 ` Dmitry Baryshkov
2021-10-25 16:10 ` Vinod Koul
2021-10-25 18:33 ` Dmitry Baryshkov
2021-10-07 7:08 ` [PATCH v2 07/11] drm/msm/disp/dpu1: Add DSC support in hw_ctl Vinod Koul
2021-10-14 14:06 ` Dmitry Baryshkov
2021-10-20 9:19 ` Vinod Koul
2021-10-07 7:08 ` [PATCH v2 08/11] drm/msm/disp/dpu1: Add support for DSC in encoder Vinod Koul
2021-10-25 14:44 ` Dmitry Baryshkov
2021-10-07 7:08 ` [PATCH v2 09/11] drm/msm/disp/dpu1: Add support for DSC in topology Vinod Koul
2021-10-14 14:13 ` Dmitry Baryshkov
2021-10-25 14:37 ` Dmitry Baryshkov [this message]
2021-10-25 16:11 ` Vinod Koul
2021-10-07 7:08 ` [PATCH v2 10/11] drm/msm/dsi: Add support for DSC configuration Vinod Koul
2021-10-14 23:18 ` Dmitry Baryshkov
2021-10-20 11:53 ` Vinod Koul
2021-10-07 7:09 ` [PATCH v2 11/11] drm/msm/dsi: Pass DSC params to drm_panel Vinod Koul
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