diff options
| author | Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> | 2017-10-26 02:27:51 -0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2018-09-17 14:51:10 -0400 |
| commit | de2bc45c84f7f0c5b0be441c998035b70cbe4614 (patch) | |
| tree | e67747eb1c3874419ed9e3a66a6dfd530b794745 /drivers/media/platform/vsp1/vsp1_lif.c | |
| parent | 5eea860a6fec1e60709d19832015ee0991d3e80c (diff) | |
media: vsp1: Update LIF buffer thresholds
The LIF module has a data buffer to accommodate clock rate differences
between the DU and the VSP. Several programmable threshold values
control DU start of frame notification by the VSP and VSP clock
stop/resume. The R-Car Gen2 and Gen3 datasheets recommend values for the
different SoCs. Update the driver to use the recommended values for
optimal operation.
Based on a BSP patch from Koji Matsuoka <koji.matsuoka.xm@renesas.com>,
with Gen2 and V3H/V3M updates.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'drivers/media/platform/vsp1/vsp1_lif.c')
| -rw-r--r-- | drivers/media/platform/vsp1/vsp1_lif.c | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/drivers/media/platform/vsp1/vsp1_lif.c b/drivers/media/platform/vsp1/vsp1_lif.c index 0cb63244b21a..0b18f0bd7419 100644 --- a/drivers/media/platform/vsp1/vsp1_lif.c +++ b/drivers/media/platform/vsp1/vsp1_lif.c @@ -88,14 +88,35 @@ static void lif_configure_stream(struct vsp1_entity *entity, { const struct v4l2_mbus_framefmt *format; struct vsp1_lif *lif = to_lif(&entity->subdev); - unsigned int hbth = 1300; - unsigned int obth = 400; - unsigned int lbth = 200; + unsigned int hbth; + unsigned int obth; + unsigned int lbth; format = vsp1_entity_get_pad_format(&lif->entity, lif->entity.config, LIF_PAD_SOURCE); - obth = min(obth, (format->width + 1) / 2 * format->height - 4); + switch (entity->vsp1->version & VI6_IP_VERSION_SOC_MASK) { + case VI6_IP_VERSION_MODEL_VSPD_GEN2: + case VI6_IP_VERSION_MODEL_VSPD_V2H: + hbth = 1536; + obth = min(128U, (format->width + 1) / 2 * format->height - 4); + lbth = 1520; + break; + + case VI6_IP_VERSION_MODEL_VSPDL_GEN3: + case VI6_IP_VERSION_MODEL_VSPD_V3: + hbth = 0; + obth = 1500; + lbth = 0; + break; + + case VI6_IP_VERSION_MODEL_VSPD_GEN3: + default: + hbth = 0; + obth = 3000; + lbth = 0; + break; + } vsp1_lif_write(lif, dlb, VI6_LIF_CSBTH, (hbth << VI6_LIF_CSBTH_HBTH_SHIFT) | |