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@xxxxxx>
---
drivers/gpu/drm/omapdrm/dss/dispc.c | 13 +++++++++++++
drivers/gpu/drm/omapdrm/dss/omapdss.h | 2 ++
2 files changed, 15 insertions(+)
diff --git a/drivers/gpu/drm/omapdrm/dss/dispc.c b/drivers/gpu/drm/omapdrm/dss/dispc.c
index 0f4fdb221498..90f9ad89af0d 100644
--- a/drivers/gpu/drm/omapdrm/dss/dispc.c
+++ b/drivers/gpu/drm/omapdrm/dss/dispc.c
@@ -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,
diff --git a/drivers/gpu/drm/omapdrm/dss/omapdss.h b/drivers/gpu/drm/omapdrm/dss/omapdss.h
index 990422b35784..c2166d2d3f29 100644
--- a/drivers/gpu/drm/omapdrm/dss/omapdss.h
+++ b/drivers/gpu/drm/omapdrm/dss/omapdss.h
@@ -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);
--
Peter
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
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