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Date:	Thu, 3 Jul 2014 17:31:21 -0400
From:	Rob Clark <robdclark@...il.com>
To:	Benjamin Gaignard <benjamin.gaignard@...aro.org>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Thierry Reding <thierry.reding@...il.com>,
	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	"linaro-mm-sig@...ts.linaro.org" <linaro-mm-sig@...ts.linaro.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	David Airlie <airlied@...ux.ie>
Subject: Re: [PATCH v5 00/11] Add DRM for stih4xx platforms

>From a brief look, it looks like my comments have been addressed, so I
think this is starting to shape up..

Laurent/Thierry/Russell, I don't suppose any of you are likely to have
time before 3.17 merge window to give sti one last once-over to see
what I missed ;-)

BR,
-R

On Wed, Jun 18, 2014 at 4:51 AM, Benjamin Gaignard
<benjamin.gaignard@...aro.org> wrote:
> This series of patches add the support of DRM/KMS drivers for STMicroelectronics
> chipsets stih416 and stih407.
>
> version 5:
>         - Rework sti_drm_drv probes functions to support deferred probe.
>           This allow hdmi to delayed framebuffer creation until I2C is available.
>         - Add ops functsions in sti_layer structure to simpify GDP and VID code.
>         - Add NOTES file to describe how the DRM concepts are mapped on hardware.
>
>         patches could be found here: git://git.linaro.org/people/benjamin.gaignard/kernel.git
>         on branch: drm_kms_for_next-v5
>
> version 4:
>         - Remove depency between TVout it subdevices HDMI and HDA
>         - Rework and simplify VTG and VTAC code
>         - Fix numbers of typo and indentation
>         - Remove debug (will be push in separate patches)
>         - Fix remarks done in previous patcheset
>
>         patches could be found here: git://git.linaro.org/people/benjamin.gaignard/kernel.git
>         on branch: drm_kms_for_next-v4
>
> version 3:
>         - Correctly split code between probe and bind funtions
>         - Squash some commits
>         - remove HQ-VDP device code to have a smaller patcheset,
>           we will introduce it later.
>
>         patches could be found here: git://git.linaro.org/people/benjamin.gaignard/kernel.git
>         on branch: drm_kms_for_next-v3
>
> version 2:
>         - Use componentized device instead of register sub-devices in master
>         driver probe function
>         - Fix Makefile and Kconfig to only allow built-in compilation
>
>         patches could be found here: git://git.linaro.org/people/benjamin.gaignard/kernel.git
>         on branch: drm_kms_for_next-v2
>
> version 1:
>         - First path submission
>
> Hardware is split in two main blocks: Compositor and TVout. Each of them
> includes specific hardware IPs and the display timing are controlled by a specific
> Video Timing Generator hardware IP (VTG).
>
> Compositor is made of the follow hardware IPs:
>  - GDP (Generic Display Pipeline) which is an entry point for graphic (RGB)
>    buffers
>  - VDP (Video Diplay Pipeline) which is an entry point for video (YUV) buffers
>  - HQVDP (High Quality Video Display Processor) that supports scaling,
>    deinterlacing and some miscellaneous image quality improvements.
>    It fetches the Video decoded buffers from memory, processes them and pushes
>    them to the Compositor through a HW dedicated bus.
>  - Mixer is responsible of mixing all the entries depending of their
>    respective z-order and layout
>
> TVout is divided in 3 parts:
>  - HDMI to generate HDMI signals, depending of chipset version HDMI phy can
>    change.
>  - HDA to generate signals for HD analog TV
>  - VIP to control/switch data path coming from Compositor
>
> On stih416 compositor and Tvout are on different dies so a Video Trafic Advance
> inter-die Communication mechanism (VTAC) is needed.
>
> +---------------------------------------------+   +----------------------------------------+
> | +-------------------------------+   +----+  |   |  +----+   +--------------------------+ |
> | |                               |   |    |  |   |  |    |   |  +---------+     +----+  | |
> | | +----+              +------+  |   |    |  |   |  |    |   |  | VIP     |---->|HDMI|  | |
> | | |GPD +------------->|      |  |   |    |  |   |  |    |   |  |         |     +----+  | |
> | | +----+              |Mixer |--|-->|    |  |   |  |    |---|->| switcher|             | |
> | |                     |      |  |   |    |  |   |  |    |   |  |         |     +----+  | |
> | |                     |      |  |   |    |  |   |  |    |   |  |         |---->|HDA |  | |
> | |                     +------+  |   |VTAC|========>|VTAC|   |  +---------+     +----+  | |
> | |                               |   |    |  |   |  |    |   |                          | |
> | |         Compositor            |   |    |  |   |  |    |   |           TVout          | |
> | +-------------------------------+   |    |  |   |  |    |   +--------------------------+ |
> |                      ^              |    |  |   |  |    |             ^                  |
> |                      |              |    |  |   |  |    |             |                  |
> |               +--------------+      |    |  |   |  |    |      +-------------+           |
> |               | VTG (master) |----->|    |  |   |  |    |----->| VTG (slave) |           |
> |               +--------------+      +----+  |   |  +----+      +-------------+           |
> |Digital die                                  |   |                              Analog Die|
> +---------------------------------------------+   +----------------------------------------+
>
> On stih407 Compositor and Tvout are on the same die
>
> +-----------------------------------------------------------------+
> | +-------------------------------+  +--------------------------+ |
> | |                               |  |  +---------+     +----+  | |
> | | +----+              +------+  |  |  | VIP     |---->|HDMI|  | |
> | | |GPD +------------->|      |  |  |  |         |     +----+  | |
> | | +----+              |Mixer |--|--|->| switcher|             | |
> | | +----+   +-----+    |      |  |  |  |         |     +----+  | |
> | | |VDP +-->+HQVDP+--->|      |  |  |  |         |---->|HDA |  | |
> | | +----+   +-----+    +------+  |  |  +---------+     +----+  | |
> | |                               |  |                          | |
> | |         Compositor            |  |           TVout          | |
> | +-------------------------------+  +--------------------------+ |
> |                              ^        ^                         |
> |                              |        |                         |
> |                           +--------------+                      |
> |                           |     VTG      |                      |
> |                           +--------------+                      |
> |Digital die                                                      |
> +-----------------------------------------------------------------+
>
> In addition of the drivers for the IPs listed before a thin I2C driver (hdmiddc) is used
> by HDMI driver to retrieve EDID for monitor.
>
> To unify interfaces of GDP and VDP we create a "layer" interface called by
> compositor to control both GPD and VDP.
>
> Hardware have memory contraints (alignment, contiguous) so we use CMA drm helpers functions
> to allocate frame buffer.
>
> File naming convention is:
>  - sti_* for IPs drivers
>  - sti_drm_* for drm functions implementation.
>
> Benjamin Gaignard (11):
>   drm: sti: add bindings for DRM driver
>   drm: sti: add VTG driver
>   drm: sti: add VTAC drivers
>   drm: sti: add HDMI driver
>   drm: sti: add HDA driver
>   drm: sti: add TVOut driver
>   drm: sti: add GDP layer
>   drm: sti: add VID layer
>   drm: sti: add Mixer
>   drm: sti: add Compositor
>   drm: sti: Add DRM driver itself
>
>  .../devicetree/bindings/gpu/st,stih4xx.txt         | 189 +++++
>  drivers/gpu/drm/Kconfig                            |   2 +
>  drivers/gpu/drm/Makefile                           |   1 +
>  drivers/gpu/drm/sti/Kconfig                        |  14 +
>  drivers/gpu/drm/sti/Makefile                       |  17 +
>  drivers/gpu/drm/sti/NOTES                          |  58 ++
>  drivers/gpu/drm/sti/sti_compositor.c               | 264 +++++++
>  drivers/gpu/drm/sti/sti_compositor.h               |  90 +++
>  drivers/gpu/drm/sti/sti_drm_crtc.c                 | 419 +++++++++++
>  drivers/gpu/drm/sti/sti_drm_crtc.h                 |  21 +
>  drivers/gpu/drm/sti/sti_drm_drv.c                  | 244 +++++++
>  drivers/gpu/drm/sti/sti_drm_drv.h                  |  29 +
>  drivers/gpu/drm/sti/sti_drm_plane.c                | 192 +++++
>  drivers/gpu/drm/sti/sti_drm_plane.h                |  17 +
>  drivers/gpu/drm/sti/sti_gdp.c                      | 549 ++++++++++++++
>  drivers/gpu/drm/sti/sti_gdp.h                      |  16 +
>  drivers/gpu/drm/sti/sti_hda.c                      | 790 ++++++++++++++++++++
>  drivers/gpu/drm/sti/sti_hdmi.c                     | 808 +++++++++++++++++++++
>  drivers/gpu/drm/sti/sti_hdmi.h                     |  88 +++
>  drivers/gpu/drm/sti/sti_hdmi_tx3g0c55phy.c         | 336 +++++++++
>  drivers/gpu/drm/sti/sti_hdmi_tx3g0c55phy.h         |  14 +
>  drivers/gpu/drm/sti/sti_hdmi_tx3g4c28phy.c         | 211 ++++++
>  drivers/gpu/drm/sti/sti_hdmi_tx3g4c28phy.h         |  14 +
>  drivers/gpu/drm/sti/sti_layer.c                    | 206 ++++++
>  drivers/gpu/drm/sti/sti_layer.h                    | 125 ++++
>  drivers/gpu/drm/sti/sti_mixer.c                    | 249 +++++++
>  drivers/gpu/drm/sti/sti_mixer.h                    |  54 ++
>  drivers/gpu/drm/sti/sti_tvout.c                    | 657 +++++++++++++++++
>  drivers/gpu/drm/sti/sti_vid.c                      | 138 ++++
>  drivers/gpu/drm/sti/sti_vid.h                      |  12 +
>  drivers/gpu/drm/sti/sti_vtac.c                     | 211 ++++++
>  drivers/gpu/drm/sti/sti_vtg.c                      | 356 +++++++++
>  drivers/gpu/drm/sti/sti_vtg.h                      |  28 +
>  33 files changed, 6419 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/gpu/st,stih4xx.txt
>  create mode 100644 drivers/gpu/drm/sti/Kconfig
>  create mode 100644 drivers/gpu/drm/sti/Makefile
>  create mode 100644 drivers/gpu/drm/sti/NOTES
>  create mode 100644 drivers/gpu/drm/sti/sti_compositor.c
>  create mode 100644 drivers/gpu/drm/sti/sti_compositor.h
>  create mode 100644 drivers/gpu/drm/sti/sti_drm_crtc.c
>  create mode 100644 drivers/gpu/drm/sti/sti_drm_crtc.h
>  create mode 100644 drivers/gpu/drm/sti/sti_drm_drv.c
>  create mode 100644 drivers/gpu/drm/sti/sti_drm_drv.h
>  create mode 100644 drivers/gpu/drm/sti/sti_drm_plane.c
>  create mode 100644 drivers/gpu/drm/sti/sti_drm_plane.h
>  create mode 100644 drivers/gpu/drm/sti/sti_gdp.c
>  create mode 100644 drivers/gpu/drm/sti/sti_gdp.h
>  create mode 100644 drivers/gpu/drm/sti/sti_hda.c
>  create mode 100644 drivers/gpu/drm/sti/sti_hdmi.c
>  create mode 100644 drivers/gpu/drm/sti/sti_hdmi.h
>  create mode 100644 drivers/gpu/drm/sti/sti_hdmi_tx3g0c55phy.c
>  create mode 100644 drivers/gpu/drm/sti/sti_hdmi_tx3g0c55phy.h
>  create mode 100644 drivers/gpu/drm/sti/sti_hdmi_tx3g4c28phy.c
>  create mode 100644 drivers/gpu/drm/sti/sti_hdmi_tx3g4c28phy.h
>  create mode 100644 drivers/gpu/drm/sti/sti_layer.c
>  create mode 100644 drivers/gpu/drm/sti/sti_layer.h
>  create mode 100644 drivers/gpu/drm/sti/sti_mixer.c
>  create mode 100644 drivers/gpu/drm/sti/sti_mixer.h
>  create mode 100644 drivers/gpu/drm/sti/sti_tvout.c
>  create mode 100644 drivers/gpu/drm/sti/sti_vid.c
>  create mode 100644 drivers/gpu/drm/sti/sti_vid.h
>  create mode 100644 drivers/gpu/drm/sti/sti_vtac.c
>  create mode 100644 drivers/gpu/drm/sti/sti_vtg.c
>  create mode 100644 drivers/gpu/drm/sti/sti_vtg.h
>
> --
> 1.9.1
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@...ts.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/dri-devel
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