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Message-ID: <wky3mjl7fn773myatyrdsea6oc2xebkvrgmigmmoj36eswgqry@2kox5ad5dynl>
Date: Sat, 27 Jul 2024 19:39:55 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Liu Ying <victor.liu@....com>
Cc: dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org, linux-phy@...ts.infradead.org, p.zabel@...gutronix.de,
airlied@...il.com, daniel@...ll.ch, maarten.lankhorst@...ux.intel.com,
mripard@...nel.org, tzimmermann@...e.de, robh@...nel.org, krzk+dt@...nel.org,
conor+dt@...nel.org, shawnguo@...nel.org, s.hauer@...gutronix.de,
kernel@...gutronix.de, festevam@...il.com, tglx@...utronix.de, vkoul@...nel.org,
kishon@...nel.org, aisheng.dong@....com, agx@...xcpu.org, francesco@...cini.it,
frank.li@....com
Subject: Re: [PATCH v3 00/19] Add Freescale i.MX8qxp Display Controller
support
On Wed, Jul 24, 2024 at 05:29:31PM GMT, Liu Ying wrote:
> Hi,
>
> This patch series aims to add Freescale i.MX8qxp Display Controller support.
>
> The controller is comprised of three main components that include a blit
> engine for 2D graphics accelerations, display controller for display output
> processing, as well as a command sequencer.
>
> Previous patch series attempts to do that can be found at:
> https://patchwork.freedesktop.org/series/84524/
>
> This series addresses Maxime's comments on the previous one:
> a. Split the display controller into multiple internal devices.
> 1) List display engine, pixel engine, interrupt controller and more as the
> controller's child devices.
> 2) List display engine and pixel engine's processing units as their child
> devices.
>
> b. Add minimal feature support.
> Only support two display pipelines with primary planes with XR24 fb,
> backed by two fetchunits. No fetchunit dynamic allocation logic(to be done
> when necessary).
>
> c. Use drm_dev_{enter, exit}().
>
> Since this series changes a lot comparing to the previous one, I choose to
> send it with a new patch series, not a new version.
I'm sorry, I have started reviewing v2 without noticing that there is a
v3 already.
Let me summarize my comments:
- You are using OF aliases. Are they documented and acked by DT
maintainers?
- I generally feel that the use of so many small devices to declare
functional blocks is an abuse of the DT. Please consider creating
_small_ units from the driver code directly rather than going throught
the components. Also please describe how everything fits together in
the cover letter.
- I assume that there more functional units that you are cunrretly
adding and there is more versatility. Please describe that in the
commit messages.
- I see a lot of small functions, which can be inlined without the lost
of code clarify. Please consider self-reviewing your code from this
perspective.
- There were other small comments, but I think they are less important
now. You might still consider them for v4.
> To follow up i.MX8qxp TRM, I changed the controller name to "Display Controller"
> instead of the previous "DPU". "DPU" is only mentioned in the SoC block
> diagram and represents the whole display subsystem which includes the display
> controller and prefech engines, etc.
>
> With an additional patch[1] for simple-pm-bus.c, this series facilitates
> testing a LVDS panel on i.MX8qxp MEK.
>
> Please do NOT merge patch 14-19.
>
> [1] https://lkml.org/lkml/2023/1/25/120
>
> v3:
> * Collect Rob's R-b tag on the patch for adding fsl,imx8qxp-dc-intc.yaml.
> * Combine fsl,imx8qxp-dc-fetchunit-common.yaml,
> fsl,imx8qxp-dc-fetchlayer.yaml and fsl,imx8qxp-dc-fetchwarp.yaml
> into 1 schema doc fsl,imx8qxp-dc-fetchunit.yaml. (Rob)
> * Document all processing units, command sequencer, axi performance counter
> and blit engine. (Rob)
>
> v2:
> * Drop fsl,dc-*-id DT properties from fsl,imx8qxp-dc*.yaml. (Krzysztof)
> * Move port property from fsl,imx8qxp-dc-display-engine.yaml to
> fsl,imx8qxp-dc-tcon.yaml. (Krzysztof)
> * Drop unneeded "|" from fsl,imx8qxp-dc-intc.yaml. (Krzysztof)
> * Use generic pmu pattern property in fsl,imx8qxp-dc.yaml. (Krzysztof)
> * Fix register range size in fsl,imx8qxp-dc*.yaml.
> * Use OF alias id to get instance id from display driver.
> * Find next bridge from TCon's port from display driver.
> * Drop drm/drm_module.h include from dc-drv.c.
> * Improve file list in MAINTAINERS. (Frank)
> * Add entire i.MX8qxp display controller device tree for review. (Krzysztof)
> * Add MIPI/LVDS subsystems device tree and a DT overlay for imx8qxp
> MEK to test a LVDS panel as an example. (Francesco)
>
> Liu Ying (19):
> dt-bindings: display: imx: Add i.MX8qxp Display Controller processing
> units
> dt-bindings: display: imx: Add i.MX8qxp Display Controller blit engine
> dt-bindings: display: imx: Add i.MX8qxp Display Controller display
> engine
> dt-bindings: display: imx: Add i.MX8qxp Display Controller pixel
> engine
> dt-bindings: display: imx: Add i.MX8qxp Display Controller AXI
> performance counter
> dt-bindings: display: imx: Add i.MX8qxp Display Controller command
> sequencer
> dt-bindings: interrupt-controller: Add i.MX8qxp Display Controller
> interrupt controller
> dt-bindings: display: imx: Add i.MX8qxp Display Controller
> drm/imx: Add i.MX8qxp Display Controller display engine
> drm/imx: Add i.MX8qxp Display Controller pixel engine
> drm/imx: Add i.MX8qxp Display Controller interrupt controller
> drm/imx: Add i.MX8qxp Display Controller KMS
> MAINTAINERS: Add maintainer for i.MX8qxp Display Controller
> dt-bindings: phy: mixel,mipi-dsi-phy: Allow assigned-clock* properties
> dt-bindings: firmware: imx: Add SCU controlled display pixel link
> nodes
> arm64: dts: imx8qxp: Add display controller subsystem
> arm64: dts: imx8qxp: Add MIPI-LVDS combo subsystems
> arm64: dts: imx8qxp-mek: Enable display controller
> arm64: dts: imx8qxp-mek: Add MX8-DLVDS-LCD1 display module support
>
> ...sl,imx8qxp-dc-axi-performance-counter.yaml | 57 ++
> .../imx/fsl,imx8qxp-dc-blit-engine.yaml | 204 +++++++
> .../display/imx/fsl,imx8qxp-dc-blitblend.yaml | 41 ++
> .../display/imx/fsl,imx8qxp-dc-clut.yaml | 44 ++
> .../imx/fsl,imx8qxp-dc-command-sequencer.yaml | 67 ++
> .../imx/fsl,imx8qxp-dc-constframe.yaml | 44 ++
> .../imx/fsl,imx8qxp-dc-display-engine.yaml | 152 +++++
> .../display/imx/fsl,imx8qxp-dc-dither.yaml | 45 ++
> .../display/imx/fsl,imx8qxp-dc-extdst.yaml | 72 +++
> .../display/imx/fsl,imx8qxp-dc-fetchunit.yaml | 141 +++++
> .../display/imx/fsl,imx8qxp-dc-filter.yaml | 43 ++
> .../display/imx/fsl,imx8qxp-dc-framegen.yaml | 64 ++
> .../display/imx/fsl,imx8qxp-dc-gammacor.yaml | 32 +
> .../imx/fsl,imx8qxp-dc-layerblend.yaml | 39 ++
> .../display/imx/fsl,imx8qxp-dc-matrix.yaml | 44 ++
> .../imx/fsl,imx8qxp-dc-pixel-engine.yaml | 250 ++++++++
> .../display/imx/fsl,imx8qxp-dc-rop.yaml | 43 ++
> .../display/imx/fsl,imx8qxp-dc-safety.yaml | 34 ++
> .../imx/fsl,imx8qxp-dc-scaling-engine.yaml | 83 +++
> .../display/imx/fsl,imx8qxp-dc-signature.yaml | 53 ++
> .../display/imx/fsl,imx8qxp-dc-store.yaml | 96 +++
> .../display/imx/fsl,imx8qxp-dc-tcon.yaml | 45 ++
> .../bindings/display/imx/fsl,imx8qxp-dc.yaml | 236 +++++++
> .../devicetree/bindings/firmware/fsl,scu.yaml | 20 +
> .../fsl,imx8qxp-dc-intc.yaml | 318 ++++++++++
> .../bindings/phy/mixel,mipi-dsi-phy.yaml | 5 -
> MAINTAINERS | 8 +
> arch/arm64/boot/dts/freescale/Makefile | 4 +
> .../arm64/boot/dts/freescale/imx8-ss-dc0.dtsi | 408 +++++++++++++
> .../imx8qxp-mek-mx8-dlvds-lcd1-lvds0-odd.dtso | 183 ++++++
> arch/arm64/boot/dts/freescale/imx8qxp-mek.dts | 34 ++
> .../boot/dts/freescale/imx8qxp-ss-dc.dtsi | 240 ++++++++
> .../dts/freescale/imx8qxp-ss-mipi-lvds.dtsi | 437 +++++++++++++
> arch/arm64/boot/dts/freescale/imx8qxp.dtsi | 28 +-
> drivers/gpu/drm/imx/Kconfig | 1 +
> drivers/gpu/drm/imx/Makefile | 1 +
> drivers/gpu/drm/imx/dc/Kconfig | 8 +
> drivers/gpu/drm/imx/dc/Makefile | 7 +
> drivers/gpu/drm/imx/dc/dc-cf.c | 157 +++++
> drivers/gpu/drm/imx/dc/dc-crtc.c | 578 ++++++++++++++++++
> drivers/gpu/drm/imx/dc/dc-crtc.h | 67 ++
> drivers/gpu/drm/imx/dc/dc-de.c | 151 +++++
> drivers/gpu/drm/imx/dc/dc-de.h | 65 ++
> drivers/gpu/drm/imx/dc/dc-drv.c | 275 +++++++++
> drivers/gpu/drm/imx/dc/dc-drv.h | 54 ++
> drivers/gpu/drm/imx/dc/dc-ed.c | 266 ++++++++
> drivers/gpu/drm/imx/dc/dc-fg.c | 366 +++++++++++
> drivers/gpu/drm/imx/dc/dc-fl.c | 136 +++++
> drivers/gpu/drm/imx/dc/dc-fu.c | 241 ++++++++
> drivers/gpu/drm/imx/dc/dc-fu.h | 129 ++++
> drivers/gpu/drm/imx/dc/dc-fw.c | 149 +++++
> drivers/gpu/drm/imx/dc/dc-ic.c | 249 ++++++++
> drivers/gpu/drm/imx/dc/dc-kms.c | 143 +++++
> drivers/gpu/drm/imx/dc/dc-kms.h | 15 +
> drivers/gpu/drm/imx/dc/dc-lb.c | 300 +++++++++
> drivers/gpu/drm/imx/dc/dc-pe.c | 140 +++++
> drivers/gpu/drm/imx/dc/dc-pe.h | 91 +++
> drivers/gpu/drm/imx/dc/dc-plane.c | 227 +++++++
> drivers/gpu/drm/imx/dc/dc-plane.h | 37 ++
> drivers/gpu/drm/imx/dc/dc-tc.c | 137 +++++
> 60 files changed, 7598 insertions(+), 6 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc-axi-performance-counter.yaml
> create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc-blit-engine.yaml
> create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc-blitblend.yaml
> create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc-clut.yaml
> create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc-command-sequencer.yaml
> create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc-constframe.yaml
> create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc-display-engine.yaml
> create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc-dither.yaml
> create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc-extdst.yaml
> create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc-fetchunit.yaml
> create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc-filter.yaml
> create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc-framegen.yaml
> create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc-gammacor.yaml
> create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc-layerblend.yaml
> create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc-matrix.yaml
> create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc-pixel-engine.yaml
> create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc-rop.yaml
> create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc-safety.yaml
> create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc-scaling-engine.yaml
> create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc-signature.yaml
> create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc-store.yaml
> create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc-tcon.yaml
> create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc.yaml
> create mode 100644 Documentation/devicetree/bindings/interrupt-controller/fsl,imx8qxp-dc-intc.yaml
> create mode 100644 arch/arm64/boot/dts/freescale/imx8-ss-dc0.dtsi
> create mode 100644 arch/arm64/boot/dts/freescale/imx8qxp-mek-mx8-dlvds-lcd1-lvds0-odd.dtso
> create mode 100644 arch/arm64/boot/dts/freescale/imx8qxp-ss-dc.dtsi
> create mode 100644 arch/arm64/boot/dts/freescale/imx8qxp-ss-mipi-lvds.dtsi
> create mode 100644 drivers/gpu/drm/imx/dc/Kconfig
> create mode 100644 drivers/gpu/drm/imx/dc/Makefile
> create mode 100644 drivers/gpu/drm/imx/dc/dc-cf.c
> create mode 100644 drivers/gpu/drm/imx/dc/dc-crtc.c
> create mode 100644 drivers/gpu/drm/imx/dc/dc-crtc.h
> create mode 100644 drivers/gpu/drm/imx/dc/dc-de.c
> create mode 100644 drivers/gpu/drm/imx/dc/dc-de.h
> create mode 100644 drivers/gpu/drm/imx/dc/dc-drv.c
> create mode 100644 drivers/gpu/drm/imx/dc/dc-drv.h
> create mode 100644 drivers/gpu/drm/imx/dc/dc-ed.c
> create mode 100644 drivers/gpu/drm/imx/dc/dc-fg.c
> create mode 100644 drivers/gpu/drm/imx/dc/dc-fl.c
> create mode 100644 drivers/gpu/drm/imx/dc/dc-fu.c
> create mode 100644 drivers/gpu/drm/imx/dc/dc-fu.h
> create mode 100644 drivers/gpu/drm/imx/dc/dc-fw.c
> create mode 100644 drivers/gpu/drm/imx/dc/dc-ic.c
> create mode 100644 drivers/gpu/drm/imx/dc/dc-kms.c
> create mode 100644 drivers/gpu/drm/imx/dc/dc-kms.h
> create mode 100644 drivers/gpu/drm/imx/dc/dc-lb.c
> create mode 100644 drivers/gpu/drm/imx/dc/dc-pe.c
> create mode 100644 drivers/gpu/drm/imx/dc/dc-pe.h
> create mode 100644 drivers/gpu/drm/imx/dc/dc-plane.c
> create mode 100644 drivers/gpu/drm/imx/dc/dc-plane.h
> create mode 100644 drivers/gpu/drm/imx/dc/dc-tc.c
>
> --
> 2.34.1
>
--
With best wishes
Dmitry
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