[PATCH v2 1/2] drm/komeda: Fix bits parsing of GLB_CORE_ID

[Raveendra Talabattula <raveendra.talabattula@arm.com>]

GLB_CORE_ID contains the product and version information returned by the
hardware. The current macros parses VERSION_MINOR as a 4-bit field and
VERSION_STATUS as an 8-bit field, which does not match the register
layout. As a result, the driver reports an incorrect version number.

Fix the parsing macros to match the hardware specification:
- VERSION_MINOR is 8 bits at [11:4]
- VERSION_STATUS is 4 bits at [3:0]

Fixes: bd628c1bed79 ("drm/komeda: komeda_dev/pipeline/component definition and initialzation")
Signed-off-by: Raveendra Talabattula <raveendra.talabattula@arm.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
---
 drivers/gpu/drm/arm/display/include/malidp_product.h | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/arm/display/include/malidp_product.h b/drivers/gpu/drm/arm/display/include/malidp_product.h
index 6f954bcdf40e..f9a3ee7ba4b7 100644
--- a/drivers/gpu/drm/arm/display/include/malidp_product.h
+++ b/drivers/gpu/drm/arm/display/include/malidp_product.h
@@ -8,14 +8,18 @@
 #define _MALIDP_PRODUCT_H_
 
 /* Product identification */
+/* GLB_CORE_ID fields as per HW specification:
+ * MINOR is 8 bits ([11:4]) and STATUS is 4 bits ([3:0]).
+ * Update masks/shifts accordingly.
+ */
 #define MALIDP_CORE_ID(__product, __major, __minor, __status) \
 	((((__product) & 0xFFFF) << 16) | (((__major) & 0xF) << 12) | \
-	(((__minor) & 0xF) << 8) | ((__status) & 0xFF))
+	(((__minor) & 0xFF) << 4) | ((__status) & 0xF))
 
 #define MALIDP_CORE_ID_PRODUCT_ID(__core_id) ((__u32)(__core_id) >> 16)
 #define MALIDP_CORE_ID_MAJOR(__core_id)      (((__u32)(__core_id) >> 12) & 0xF)
-#define MALIDP_CORE_ID_MINOR(__core_id)      (((__u32)(__core_id) >> 8) & 0xF)
-#define MALIDP_CORE_ID_STATUS(__core_id)     (((__u32)(__core_id)) & 0xFF)
+#define MALIDP_CORE_ID_MINOR(__core_id)      (((__u32)(__core_id) >>  4) & 0xFF)
+#define MALIDP_CORE_ID_STATUS(__core_id)     ((__u32)(__core_id) & 0xF)
 
 /* Mali-display product IDs */
 #define MALIDP_D71_PRODUCT_ID	0x0071
-- 
2.43.0