[PATCH 0/6] drm/msm: A DRM/KMS driver for snapdragon SoCs
Rob Clark
robdclark at gmail.com
Sun Aug 4 10:23:37 PDT 2013
This patchset can also be found here, for easier browsing:
http://cgit.freedesktop.org/~robclark/linux/log/?h=drm-next
git://people.freedesktop.org/~robclark/linux drm-next
Compared to the previous patchset (RFCv2), there are a number of
fixes (leaks, etc), fixed handling of some clocks (ie. don't disable
PLL that feeds a clk before disabling the clk, etc), cleaned up the
handling for device specific config (with placeholders for DT
bindings), etc. At this point, I have gnome-shell, wayland (weston
drm compositor), etc working pretty well.
In userspace, I've a libdrm branch with libdrm_freedreno updated to
work on top of either this driver or the downstream android kgsl+fbdev
drivers:
https://github.com/freedreno/libdrm/commits/msm-drm
And the DDX has been updated to either use kms with this driver, or
the downstream android drivers. Note that page flipping requires kms:
https://github.com/freedreno/xf86-video-freedreno/commits/msm-drm
And finally mesa/gallium with a few minor tweaks, mostly updates to
the loader to load on either "msm" or legacy/downstream "kgsl":
https://github.com/freedreno/mesa/commits/msm-drm
At this point I consider the first four patches as ready to merge.
The last two add debugfs files for logging cmdstream (which is hugely
useful for debugging gpu lockups), and for some basic performance
monitoring. They are just RFC at this point, as there are some hacks
to work around the fact that drv->load() is called *after* the debugfs
initialization (so I can't grab dev->dev_private). But I'm including
those two to see if anyone has any comments/suggestions.
NOTES from the previous RFCs:
In the current snapdragon SoC's, we have (at least) 3 different
display controller blocks at play:
+ MDP3 - ?? seems to be what is on geeksphone peak device
+ MDP4 - S3 (APQ8060, touchpad), S4-pro (APQ8064, nexus4 & ifc6410)
+ MDSS - snapdragon 800
(I don't have a completely clear picture on which display controller
maps to which part #)
Plus a handful of blocks around them for HDMI/DSI/etc output.
And on gpu side of things:
+ zero, one, or two 2d cores (z180)
+ and either a2xx or a3xx 3d core.
But, HDMI/DSI/etc blocks seem like they can be shared across multiple
display controller blocks. And I for sure don't want to have to deal
with N different kms devices from xf86-video-freedreno. Plus, it
seems like we can do some clever tricks like use GPU to trigger
pageflip after rendering completes (ie. have the kms/crtc code build
up gpu cmdstream to update scanout and write FLUSH register after).
So, the approach is one drm driver, with some modularity. Different
'struct msm_kms' implementations, depending on display controller.
And one or more 'struct msm_gpu' for the various different gpu sub-
modules.
The kms module provides the plane, crtc, and encoder objects, and
loads whatever connectors are appropriate.
For MDP4, the mapping is:
plane -> PIPE{RGBn,VGn} \
crtc -> OVLP{n} + DMA{P,S,E} (??) |-> MDP "device"
encoder -> DTV/LCDC/DSI (within MDP4) /
connector -> HDMI/DSI/etc --> other device(s)
Since the irq's that drm core mostly cares about are vblank/framedone,
we'll let msm_mdp4_kms provide the irq install/uninstall/etc functions
and treat the MDP4 block's irq as "the" irq. Even though the connectors
may have their own irqs which they install themselves. For this reason
the display controller is the "master" device.
Each connector probably ends up being a separate device, just for the
logistics of finding/mapping io region, irq, etc. Idealy we would
have a better way than just stashing the platform device in a global
(ie. like DT super-node.. but I don't have any snapdragon hw yet that
is using DT).
Note that so far I've not been able to get any docs on the hw, and it
seems that access to such docs would prevent me from working on the
freedreno gallium driver. So there may be some mistakes in register
names (I had to invent a few, since no sufficient hint was given in
the downstream android fbdev driver), bitfield sizes, etc. My current
state of understanding the registers is given in the envytools rnndb
files at:
https://github.com/freedreno/envytools/tree/master/rnndb
These files are used both for a parser tool (in the same tree) to
parse logged register reads/writes (both from downstream android fbdev
driver, and this driver with register logging enabled), as well as to
generate the register level headers.
Rob Clark (6):
drm/msm: add register definitions
drm/msm: basic KMS driver for snapdragon
drm/msm: add register definitions for gpu
drm/msm: add a3xx gpu support
RFC: drm/msm: add rd logging debugfs
RFC: drm/msm: add perf logging debugfs
drivers/gpu/drm/Kconfig | 2 +
drivers/gpu/drm/Makefile | 1 +
drivers/gpu/drm/msm/Kconfig | 34 +
drivers/gpu/drm/msm/Makefile | 32 +
drivers/gpu/drm/msm/NOTES | 69 +
drivers/gpu/drm/msm/adreno/a2xx.xml.h | 1438 ++++++++++++++++
drivers/gpu/drm/msm/adreno/a3xx.xml.h | 2193 ++++++++++++++++++++++++
drivers/gpu/drm/msm/adreno/a3xx_gpu.c | 511 ++++++
drivers/gpu/drm/msm/adreno/a3xx_gpu.h | 30 +
drivers/gpu/drm/msm/adreno/adreno_common.xml.h | 432 +++++
drivers/gpu/drm/msm/adreno/adreno_gpu.c | 348 ++++
drivers/gpu/drm/msm/adreno/adreno_gpu.h | 140 ++
drivers/gpu/drm/msm/adreno/adreno_pm4.xml.h | 254 +++
drivers/gpu/drm/msm/dsi/dsi.xml.h | 262 +++
drivers/gpu/drm/msm/dsi/mmss_cc.xml.h | 156 ++
drivers/gpu/drm/msm/dsi/sfpb.xml.h | 46 +
drivers/gpu/drm/msm/hdmi/hdmi.c | 246 +++
drivers/gpu/drm/msm/hdmi/hdmi.h | 112 ++
drivers/gpu/drm/msm/hdmi/hdmi.xml.h | 508 ++++++
drivers/gpu/drm/msm/hdmi/hdmi_connector.c | 461 +++++
drivers/gpu/drm/msm/hdmi/hdmi_i2c.c | 281 +++
drivers/gpu/drm/msm/hdmi/hdmi_phy_8960.c | 141 ++
drivers/gpu/drm/msm/hdmi/hdmi_phy_8x60.c | 214 +++
drivers/gpu/drm/msm/hdmi/qfprom.xml.h | 50 +
drivers/gpu/drm/msm/mdp4/mdp4.xml.h | 1053 ++++++++++++
drivers/gpu/drm/msm/mdp4/mdp4_crtc.c | 638 +++++++
drivers/gpu/drm/msm/mdp4/mdp4_dtv_encoder.c | 312 ++++
drivers/gpu/drm/msm/mdp4/mdp4_format.c | 56 +
drivers/gpu/drm/msm/mdp4/mdp4_irq.c | 203 +++
drivers/gpu/drm/msm/mdp4/mdp4_kms.c | 374 ++++
drivers/gpu/drm/msm/mdp4/mdp4_kms.h | 193 +++
drivers/gpu/drm/msm/mdp4/mdp4_plane.c | 243 +++
drivers/gpu/drm/msm/msm_connector.c | 34 +
drivers/gpu/drm/msm/msm_connector.h | 68 +
drivers/gpu/drm/msm/msm_drv.c | 775 +++++++++
drivers/gpu/drm/msm/msm_drv.h | 224 +++
drivers/gpu/drm/msm/msm_fb.c | 202 +++
drivers/gpu/drm/msm/msm_fbdev.c | 258 +++
drivers/gpu/drm/msm/msm_gem.c | 597 +++++++
drivers/gpu/drm/msm/msm_gem.h | 100 ++
drivers/gpu/drm/msm/msm_gem_submit.c | 413 +++++
drivers/gpu/drm/msm/msm_gpu.c | 531 ++++++
drivers/gpu/drm/msm/msm_gpu.h | 147 ++
drivers/gpu/drm/msm/msm_perf.c | 270 +++
drivers/gpu/drm/msm/msm_rd.c | 334 ++++
drivers/gpu/drm/msm/msm_ringbuffer.c | 61 +
drivers/gpu/drm/msm/msm_ringbuffer.h | 43 +
include/uapi/drm/Kbuild | 1 +
include/uapi/drm/msm_drm.h | 198 +++
49 files changed, 15289 insertions(+)
create mode 100644 drivers/gpu/drm/msm/Kconfig
create mode 100644 drivers/gpu/drm/msm/Makefile
create mode 100644 drivers/gpu/drm/msm/NOTES
create mode 100644 drivers/gpu/drm/msm/adreno/a2xx.xml.h
create mode 100644 drivers/gpu/drm/msm/adreno/a3xx.xml.h
create mode 100644 drivers/gpu/drm/msm/adreno/a3xx_gpu.c
create mode 100644 drivers/gpu/drm/msm/adreno/a3xx_gpu.h
create mode 100644 drivers/gpu/drm/msm/adreno/adreno_common.xml.h
create mode 100644 drivers/gpu/drm/msm/adreno/adreno_gpu.c
create mode 100644 drivers/gpu/drm/msm/adreno/adreno_gpu.h
create mode 100644 drivers/gpu/drm/msm/adreno/adreno_pm4.xml.h
create mode 100644 drivers/gpu/drm/msm/dsi/dsi.xml.h
create mode 100644 drivers/gpu/drm/msm/dsi/mmss_cc.xml.h
create mode 100644 drivers/gpu/drm/msm/dsi/sfpb.xml.h
create mode 100644 drivers/gpu/drm/msm/hdmi/hdmi.c
create mode 100644 drivers/gpu/drm/msm/hdmi/hdmi.h
create mode 100644 drivers/gpu/drm/msm/hdmi/hdmi.xml.h
create mode 100644 drivers/gpu/drm/msm/hdmi/hdmi_connector.c
create mode 100644 drivers/gpu/drm/msm/hdmi/hdmi_i2c.c
create mode 100644 drivers/gpu/drm/msm/hdmi/hdmi_phy_8960.c
create mode 100644 drivers/gpu/drm/msm/hdmi/hdmi_phy_8x60.c
create mode 100644 drivers/gpu/drm/msm/hdmi/qfprom.xml.h
create mode 100644 drivers/gpu/drm/msm/mdp4/mdp4.xml.h
create mode 100644 drivers/gpu/drm/msm/mdp4/mdp4_crtc.c
create mode 100644 drivers/gpu/drm/msm/mdp4/mdp4_dtv_encoder.c
create mode 100644 drivers/gpu/drm/msm/mdp4/mdp4_format.c
create mode 100644 drivers/gpu/drm/msm/mdp4/mdp4_irq.c
create mode 100644 drivers/gpu/drm/msm/mdp4/mdp4_kms.c
create mode 100644 drivers/gpu/drm/msm/mdp4/mdp4_kms.h
create mode 100644 drivers/gpu/drm/msm/mdp4/mdp4_plane.c
create mode 100644 drivers/gpu/drm/msm/msm_connector.c
create mode 100644 drivers/gpu/drm/msm/msm_connector.h
create mode 100644 drivers/gpu/drm/msm/msm_drv.c
create mode 100644 drivers/gpu/drm/msm/msm_drv.h
create mode 100644 drivers/gpu/drm/msm/msm_fb.c
create mode 100644 drivers/gpu/drm/msm/msm_fbdev.c
create mode 100644 drivers/gpu/drm/msm/msm_gem.c
create mode 100644 drivers/gpu/drm/msm/msm_gem.h
create mode 100644 drivers/gpu/drm/msm/msm_gem_submit.c
create mode 100644 drivers/gpu/drm/msm/msm_gpu.c
create mode 100644 drivers/gpu/drm/msm/msm_gpu.h
create mode 100644 drivers/gpu/drm/msm/msm_perf.c
create mode 100644 drivers/gpu/drm/msm/msm_rd.c
create mode 100644 drivers/gpu/drm/msm/msm_ringbuffer.c
create mode 100644 drivers/gpu/drm/msm/msm_ringbuffer.h
create mode 100644 include/uapi/drm/msm_drm.h
--
1.8.3.1
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