[PATCH 47/92] ram: rk3399: debug: Add sdram_print_stride

Jagan Teki
2019-06-11T14:50:50Z

Add code to print the channel stride, this would help to
print the stride of associated channel.

Here is sample print on LPDDR4, 50MHz.
256B stride

Signed-off-by: Jagan Teki <jagan-dyjBcgdgk7Pe9wHmmfpqLFaTQe2KTcn/@public.gmane.org>
Signed-off-by: YouMin Chen <cym-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
---
.../include/asm/arch-rockchip/sdram_common.h | 5 ++++
drivers/ram/rockchip/sdram_debug.c | 29 +++++++++++++++++++
2 files changed, 34 insertions(+)

diff --git a/arch/arm/include/asm/arch-rockchip/sdram_common.h b/arch/arm/include/asm/arch-rockchip/sdram_common.h
index 3935733871..69cafda904 100644
--- a/arch/arm/include/asm/arch-rockchip/sdram_common.h
+++ b/arch/arm/include/asm/arch-rockchip/sdram_common.h
@@ -132,10 +132,15 @@ inline void sdram_print_ddr_info(struct sdram_cap_info *cap_info,
struct sdram_base_params *base)
{
}
+
+inline void sdram_print_stride(unsigned int stride)
+{
+}
#else
void sdram_print_dram_type(unsigned char dramtype);
void sdram_print_ddr_info(struct sdram_cap_info *cap_info,
struct sdram_base_params *base);
+void sdram_print_stride(unsigned int stride);
#endif /* CONFIG_RAM_ROCKCHIP_DEBUG */

#endif
diff --git a/drivers/ram/rockchip/sdram_debug.c b/drivers/ram/rockchip/sdram_debug.c
index 19e9225c12..9cf662675b 100644
--- a/drivers/ram/rockchip/sdram_debug.c
+++ b/drivers/ram/rockchip/sdram_debug.c
@@ -116,3 +116,32 @@ void sdram_print_ddr_info(struct sdram_cap_info *cap_info,
printdec(cap >> 20);
printascii("MB\n");
}
+
+void sdram_print_stride(unsigned int stride)
+{
+ switch (stride) {
+ case 0xc:
+ printf("128B stride\n");
+ break;
+ case 5:
+ case 9:
+ case 0xd:
+ case 0x11:
+ case 0x19:
+ printf("256B stride\n");
+ break;
+ case 0xa:
+ case 0xe:
+ case 0x12:
+ printf("512B stride\n");
+ break;
+ case 0xf:
+ printf("4K stride\n");
+ break;
+ case 0x1f:
+ printf("32MB + 256B stride\n");
+ break;
+ default:
+ printf("no stride\n");
+ }
+}
--
2.18.0.321.gffc6fa0e3