Different hardware versions have different requirements when it comes to
pitch alignment. Add a function which can be used to check pitch
alignment for a device.
Signed-off-by: Brian Starkey <brian.starkey at arm.com>
---
drivers/gpu/drm/arm/malidp_hw.c | 3 +++
drivers/gpu/drm/arm/malidp_hw.h | 9 +++++++++
2 files changed, 12 insertions(+)
diff --git a/drivers/gpu/drm/arm/malidp_hw.c b/drivers/gpu/drm/arm/malidp_hw.c
index a6132f1..7f4a0bd 100644
--- a/drivers/gpu/drm/arm/malidp_hw.c
+++ b/drivers/gpu/drm/arm/malidp_hw.c
@@ -441,6 +441,7 @@ const struct malidp_hw_device
malidp_device[MALIDP_MAX_DEVICES] = {
},
.input_formats = malidp500_de_formats,
.n_input_formats = ARRAY_SIZE(malidp500_de_formats),
+ .bus_align_bytes = 8,
},
.query_hw = malidp500_query_hw,
.enter_config_mode = malidp500_enter_config_mode,
@@ -473,6 +474,7 @@ const struct malidp_hw_device
malidp_device[MALIDP_MAX_DEVICES] = {
},
.input_formats = malidp550_de_formats,
.n_input_formats = ARRAY_SIZE(malidp550_de_formats),
+ .bus_align_bytes = 8,
},
.query_hw = malidp550_query_hw,
.enter_config_mode = malidp550_enter_config_mode,
@@ -506,6 +508,7 @@ const struct malidp_hw_device
malidp_device[MALIDP_MAX_DEVICES] = {
},
.input_formats = malidp550_de_formats,
.n_input_formats = ARRAY_SIZE(malidp550_de_formats),
+ .bus_align_bytes = 16,
},
.query_hw = malidp650_query_hw,
.enter_config_mode = malidp550_enter_config_mode,
diff --git a/drivers/gpu/drm/arm/malidp_hw.h b/drivers/gpu/drm/arm/malidp_hw.h
index 141743e..087e1202 100644
--- a/drivers/gpu/drm/arm/malidp_hw.h
+++ b/drivers/gpu/drm/arm/malidp_hw.h
@@ -88,6 +88,9 @@ struct malidp_hw_regmap {
/* list of supported input formats for each layer */
const struct malidp_input_format *input_formats;
const u8 n_input_formats;
+
+ /* pitch alignment requirement in bytes */
+ const u8 bus_align_bytes;
};
struct malidp_hw_device {
@@ -229,6 +232,12 @@ void malidp_se_irq_fini(struct drm_device *drm);
u8 malidp_hw_get_format_id(const struct malidp_hw_regmap *map,
u8 layer_id, u32 format);
+static inline bool malidp_hw_pitch_valid(struct malidp_hw_device *hwdev,
+ unsigned int pitch)
+{
+ return !(pitch & (hwdev->map.bus_align_bytes - 1));
+}
+
/*
* background color components are defined as 12bits values,
* they will be shifted right when stored on hardware that
--
1.7.9.5
