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drm/omap: dss: Add support for reporting memory bandwidth limitation 

The get_memory_bandwidth_limit() in dispc_ops can be used to query the
memory bandwidth limit of dispc by upper layers.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Peter Ujfalusi 2017-11-30 14:12:36 +02:00 committed by Tomi Valkeinen
parent 32fdb62423
commit 867d7e0212
2 changed files with 15 additions and 0 deletions
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13
drivers/gpu/drm/omapdrm/dss/dispc.c
View File

@ -4325,6 +4325,17 @@ static void dispc_free_irq(void *dev_id)
dispc.user_data = NULL;
}
static u32 dispc_get_memory_bandwidth_limit(void)
{
u32 limit = 0;
/* Optional maximum memory bandwidth */
of_property_read_u32(dispc.pdev->dev.of_node, "max-memory-bandwidth",
&limit);
return limit;
}
/*
* Workaround for errata i734 in DSS dispc
* - LCD1 Gamma Correction Is Not Working When GFX Pipe Is Disabled
@ -4497,6 +4508,8 @@ static const struct dispc_ops dispc_ops = {
.get_num_ovls = dispc_get_num_ovls,
.get_num_mgrs = dispc_get_num_mgrs,
.get_memory_bandwidth_limit = dispc_get_memory_bandwidth_limit,
.mgr_enable = dispc_mgr_enable,
.mgr_is_enabled = dispc_mgr_is_enabled,
.mgr_get_vsync_irq = dispc_mgr_get_vsync_irq,

2
drivers/gpu/drm/omapdrm/dss/omapdss.h
View File

@ -695,6 +695,8 @@ struct dispc_ops {
int (*get_num_ovls)(void);
int (*get_num_mgrs)(void);
u32 (*get_memory_bandwidth_limit)(void);
void (*mgr_enable)(enum omap_channel channel, bool enable);
bool (*mgr_is_enabled)(enum omap_channel channel);
u32 (*mgr_get_vsync_irq)(enum omap_channel channel);