[PATCH v7 4/6] drm/sprd: add Unisoc's drm display controller driver

[Maxime Ripard]

On Mon, Oct 25, 2021 at 05:34:16PM +0800, Kevin Tang wrote:
> Adds DPU(Display Processor Unit) support for the Unisoc's display
> subsystem.
> It's support multi planes, scaler, rotation, PQ(Picture Quality) and more.
> 
> v2:
>   - Use drm_xxx to replace all DRM_XXX.
>   - Use kzalloc to replace devm_kzalloc for sprd_dpu structure init.
> 
> v3:
>   - Remove dpu_layer stuff layer and commit layers by aotmic_update
> 
> v4:
>   - Use drmm_helpers to allocate crtc and planes.
>   - Move rotation enum definitions to crtc layer reg bitfields.
>   - Move allocate crtc and planes to bind function.
> 
> v5:
>   - Fix the checkpatch warnings.
>   - Use mode_set_nofb instead of mode_valid callback.
>   - Follow the OF-Graph bindings, use of_graph_get_port_by_id
>     instead of of_parse_phandle.
>   - Use zpos to represent the layer position.
>   - Rebase to last drm misc branch.
> 
> v6:
>   - Disable and clear interrupts before register dpu IRQ
>   - Init dpi config used by crtc_state->adjusted_mode on mode_set_nofb
>   - Remove enable_irq and disable_irq function call.
>   - Remove drm_format_info function call.
> 
> v7:
>   - Remove iommu error interrupt handling function.
> 
> Cc: Orson Zhai <orsonzhai at gmail.com>
> Cc: Chunyan Zhang <zhang.lyra at gmail.com>
> Signed-off-by: Kevin Tang <kevin.tang at unisoc.com>

Reviewed-by: Maxime Ripard <maxime at cerno.tech>

Maxime
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