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Subject: [PATCH v2 11/11] drm/komeda: Expose bus_width to Komeda-CORE
Thread-Topic: [PATCH v2 11/11] drm/komeda: Expose bus_width to Komeda-CORE
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Date:   Tue, 22 Jan 2019 11:12:02 +0000
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From: "james qian wang (Arm Technology China)" <james.qian.wang@arm.com>

CHIP set bus_width according to the HW configuration, and CORE will use
it as buffer alignment.

v2: Rebase

Signed-off-by: James Qian Wang (Arm Technology China) <james.qian.wang@arm.=
com>
---
 drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c | 1 +
 drivers/gpu/drm/arm/display/komeda/komeda_kms.c  | 6 +++---
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c b/drivers/gpu=
/drm/arm/display/komeda/d71/d71_dev.c
index f517ab0ceae9..a6ca3ff16fef 100644
--- a/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c
+++ b/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c
@@ -518,6 +518,7 @@ d71_identify(u32 __iomem *reg_base, struct komeda_chip_=
info *chip)
 	chip->arch_id	=3D malidp_read32(reg_base, GLB_ARCH_ID);
 	chip->core_id	=3D malidp_read32(reg_base, GLB_CORE_ID);
 	chip->core_info	=3D malidp_read32(reg_base, GLB_CORE_INFO);
+	chip->bus_width	=3D D71_BUS_WIDTH_16_BYTES;
=20
 	return &d71_chip_funcs;
 }
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_kms.c b/drivers/gpu/=
drm/arm/display/komeda/komeda_kms.c
index 337e6fddead0..ed54beaee2f9 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
@@ -21,10 +21,10 @@ static int komeda_gem_cma_dumb_create(struct drm_file *=
file,
 				      struct drm_device *dev,
 				      struct drm_mode_create_dumb *args)
 {
-	u32 alignment =3D 16; /* TODO get alignment from dev */
+	struct komeda_dev *mdev =3D dev->dev_private;
+	u32 pitch =3D DIV_ROUND_UP(args->width * args->bpp, 8);
=20
-	args->pitch =3D ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8),
-			    alignment);
+	args->pitch =3D ALIGN(pitch, mdev->chip.bus_width);
=20
 	return drm_gem_cma_dumb_create_internal(file, dev, args);
 }
--=20
2.17.1