linux-kernel - Re: [PATCH v2 15/16] drm/msm/dpu: Implement new v12.0 DPU differences

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Message-ID: <4b2426d2-a7bb-4c19-9ebe-77f6a90caf5e@linaro.org>
Date: Wed, 19 Feb 2025 18:04:09 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc: Rob Clark <robdclark@...il.com>, Abhinav Kumar
 <quic_abhinavk@...cinc.com>, Sean Paul <sean@...rly.run>,
 Marijn Suijten <marijn.suijten@...ainline.org>,
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Krishna Manikandan <quic_mkrishn@...cinc.com>,
 Jonathan Marek <jonathan@...ek.ca>, Kuogee Hsieh <quic_khsieh@...cinc.com>,
 Neil Armstrong <neil.armstrong@...aro.org>, linux-arm-msm@...r.kernel.org,
 dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 Srini Kandagatla <srinivas.kandagatla@...aro.org>
Subject: Re: [PATCH v2 15/16] drm/msm/dpu: Implement new v12.0 DPU differences

On 17/02/2025 20:18, Dmitry Baryshkov wrote:
> On Mon, Feb 17, 2025 at 05:41:36PM +0100, Krzysztof Kozlowski wrote:
>> Implement new features and differences coming in v12.0 of DPU present on
>> Qualcomm SM8750 SoC:
>> 1. 10-bit color alpha.
>> 2. New CTL_PIPE_ACTIVE and CTL_LAYER_ACTIVE registers for pipes and
>>    layer mixers.
>> 2. Several differences in LM registers (also changed offsets) for LM
>>    crossbar hardware changes.
> 
> I'd really prefer for this patch to be split into a logical chunks
> rather than "everything for 12.x"
everything 12.x is still logical chunk. I can split more, but without
guidance what is here logical chunk, will be tricky.

For example 10-bit color alpha looks like separate feature. But
remaining PIPE/LAYER active - not sure.

I can split them but I would not call such split necessarily logical.

Best regards,
Krzysztof