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Parsing the command buffer is an expensive operation, as the command
buffer is uncached. Work-around this by providing a control to allow
the command buffer parsing to be skipped.
A better solution would be to move to cached buffers between userspace
and kernelspace, and copying the data in kernel space to the final
command buffer.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Each Vivante GPU contains a clock divider which can divide the GPU clock
by 2^n, which can lower the power dissipation from the GPU. It has been
suggested that the GC600 on Dove can be responsible for 20-30% of the
power dissipation from the SoC.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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Currently, we scan the list of mappings each time we want to operate on
the vram_mapping struct. Rather than repeatedly scanning these, look
them up once in the submission path, and then use _reference and
_unreference methods as necessary to manage this object.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
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Add tracking of the current execution state (iow, active GPU pipe).
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
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Export further minor feature bitmasks and the varyings count from
the GPU specifications registers to userspace.
Acked-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
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This adds the etnaviv DRM driver and hooks it up in Makefiles
and Kconfig.
Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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