From cb13534abe07afae88bdeadf24e42717a9657750 Mon Sep 17 00:00:00 2001 From: Jagan Teki Date: Mon, 15 Jul 2019 23:58:51 +0530 Subject: [PATCH] ram: rk3399: debug: Add sdram_print_stride 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 Signed-off-by: YouMin Chen Reviewed-by: Kever Yang --- arch/arm/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 cfbb511..b7549f5 100644 --- a/arch/arm/include/asm/arch-rockchip/sdram_common.h +++ b/arch/arm/include/asm/arch-rockchip/sdram_common.h @@ -102,10 +102,15 @@ 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 19e9225..9cf6626 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"); + } +} -- 2.7.4