diff options
author | Maxime Ripard <maxime@cerno.tech> | 2020-09-03 10:00:46 +0200 |
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committer | Maxime Ripard <maxime@cerno.tech> | 2020-09-07 18:02:51 +0200 |
commit | 87ebcd42fb7b8d1d3269007a621e41ae96a0077e (patch) | |
tree | f62a14f12199df09b729594299b439208867d39d /drivers/gpu/drm/vc4/vc4_drv.h | |
parent | 596356678fb429cc181c30971b5cb6c4244b58ad (diff) | |
download | linux-87ebcd42fb7b8d1d3269007a621e41ae96a0077e.tar.bz2 |
drm/vc4: crtc: Assign output to channel automatically
The HVS found in the BCM2711 has 6 outputs and 3 FIFOs, with each output
being connected to a pixelvalve, and some muxing between the FIFOs and
outputs.
Any output cannot feed from any FIFO though, and they all have a bunch of
constraints.
In order to support this, let's store the possible FIFOs each output can be
assigned to in the vc4_crtc_data, and use that information at atomic_check
time to iterate over all the CRTCs enabled and assign them FIFOs.
The channel assigned is then set in the vc4_crtc_state so that the rest of
the driver can use it.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Tested-by: Chanwoo Choi <cw00.choi@samsung.com>
Tested-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Link: https://patchwork.freedesktop.org/patch/msgid/f9aba3814ef37156ff36f310118cdd3954dd3dc5.1599120059.git-series.maxime@cerno.tech
Diffstat (limited to 'drivers/gpu/drm/vc4/vc4_drv.h')
-rw-r--r-- | drivers/gpu/drm/vc4/vc4_drv.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h index d1cf4c038180..9e81ad8331f1 100644 --- a/drivers/gpu/drm/vc4/vc4_drv.h +++ b/drivers/gpu/drm/vc4/vc4_drv.h @@ -447,6 +447,9 @@ to_vc4_encoder(struct drm_encoder *encoder) } struct vc4_crtc_data { + /* Bitmask of channels (FIFOs) of the HVS that the output can source from */ + unsigned int hvs_available_channels; + /* Which output of the HVS this pixelvalve sources from. */ int hvs_output; }; @@ -471,9 +474,6 @@ struct vc4_crtc { /* Timestamp at start of vblank irq - unaffected by lock delays. */ ktime_t t_vblank; - /* Which HVS channel we're using for our CRTC. */ - int channel; - u8 lut_r[256]; u8 lut_g[256]; u8 lut_b[256]; @@ -509,6 +509,7 @@ struct vc4_crtc_state { struct drm_mm_node mm; bool feed_txp; bool txp_armed; + unsigned int assigned_channel; struct { unsigned int left; |