[PATCH 3/7] drm/vc4: Add KMS support for Raspberry Pi.
eric at anholt.net
Tue Aug 18 13:56:24 PDT 2015
Daniel Vetter <daniel at ffwll.ch> writes:
> On Thu, Aug 13, 2015 at 01:44:03PM -0700, Eric Anholt wrote:
>> Daniel Vetter <daniel at ffwll.ch> writes:
>> > On Wed, Aug 12, 2015 at 05:56:16PM -0700, Eric Anholt wrote:
>> >> This is the start of a full VC4 driver. Right now this just supports
>> >> configuring the display using a pre-existing video mode (because
>> >> changing the pixel clock isn't available yet, and doesn't work when it
>> >> is). However, this is enough for fbcon and bringing up X using
>> >> xf86-video-modesetting.
>> >> Signed-off-by: Eric Anholt <eric at anholt.net>
>> >> ---
>> >> drivers/gpu/drm/Kconfig | 2 +
>> >> drivers/gpu/drm/Makefile | 1 +
>> >> drivers/gpu/drm/vc4/Kconfig | 14 +
>> >> drivers/gpu/drm/vc4/Makefile | 18 ++
>> >> drivers/gpu/drm/vc4/vc4_bo.c | 54 ++++
>> >> drivers/gpu/drm/vc4/vc4_crtc.c | 583 ++++++++++++++++++++++++++++++++++
>> >> drivers/gpu/drm/vc4/vc4_debugfs.c | 38 +++
>> >> drivers/gpu/drm/vc4/vc4_drv.c | 249 +++++++++++++++
>> >> drivers/gpu/drm/vc4/vc4_drv.h | 123 +++++++
>> >> drivers/gpu/drm/vc4/vc4_hdmi.c | 651 ++++++++++++++++++++++++++++++++++++++
>> >> drivers/gpu/drm/vc4/vc4_hvs.c | 172 ++++++++++
>> >> drivers/gpu/drm/vc4/vc4_kms.c | 84 +++++
>> >> drivers/gpu/drm/vc4/vc4_plane.c | 320 +++++++++++++++++++
>> >> drivers/gpu/drm/vc4/vc4_regs.h | 562 ++++++++++++++++++++++++++++++++
>> >> 14 files changed, 2871 insertions(+)
>> >> create mode 100644 drivers/gpu/drm/vc4/Kconfig
>> >> create mode 100644 drivers/gpu/drm/vc4/Makefile
>> >> create mode 100644 drivers/gpu/drm/vc4/vc4_bo.c
>> >> create mode 100644 drivers/gpu/drm/vc4/vc4_crtc.c
>> >> create mode 100644 drivers/gpu/drm/vc4/vc4_debugfs.c
>> >> create mode 100644 drivers/gpu/drm/vc4/vc4_drv.c
>> >> create mode 100644 drivers/gpu/drm/vc4/vc4_drv.h
>> >> create mode 100644 drivers/gpu/drm/vc4/vc4_hdmi.c
>> >> create mode 100644 drivers/gpu/drm/vc4/vc4_hvs.c
>> >> create mode 100644 drivers/gpu/drm/vc4/vc4_kms.c
>> >> create mode 100644 drivers/gpu/drm/vc4/vc4_plane.c
>> >> create mode 100644 drivers/gpu/drm/vc4/vc4_regs.h
>> > Made a quick pass and found a few things to update to latest drm
>> > developments. Of course didn't look at the hardware details since no clue,
>> > but looks really nice overall.
>> If you have anything about the hardware that you were curious about, I'd
>> be interested in trying to explain them in the comments to the extent
>> that I can. It's unfortunate that we haven't shipped docs for the
>> display side of things, but had to do a lot of reading of the verilog
>> just to get this far, anyway.
> The only thing I spotted is that you right now only register a primary and
> cursor plane. I guess the plan we once discussed about exposing piles of
> planes for -modesetting accel isn't there yet?
> But otherwise I really didn't go into the hardware details.
Yeah, I haven't done piles of planes because what we have right now
means I don't have to do the bandwidth limits tracking yet.
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