diff options
| author | AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> | 2025-11-24 14:06:56 +0300 |
|---|---|---|
| committer | AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> | 2026-01-08 12:27:49 +0300 |
| commit | 7cf9db2aca552f5f537d46f1e52e0ab08ddc2d64 (patch) | |
| tree | 1a20d3d36a299d12d43adef2a604cf8dafbeecac | |
| parent | ddb5862a43b1f40ca0a5cc16882277d8d07b966a (diff) | |
| download | linux-7cf9db2aca552f5f537d46f1e52e0ab08ddc2d64.tar.xz | |
soc: mediatek: mtk-dvfsrc: Write bandwidth to EMI DDR if present
In preparation for adding support for DVFSRC Version 4, add a new
`has_emi_ddr` member to struct dvfsrc_soc_data: if true, write the
DRAM bandwidth both to the BW_AVG and to the newly defined EMI_BW
register, present only on DVFSRC v4.
Currently supported SoCs will not use this, as has_emi_ddr is left
out from their platform data, hence reading false.
Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@collabora.com>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
| -rw-r--r-- | drivers/soc/mediatek/mtk-dvfsrc.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/soc/mediatek/mtk-dvfsrc.c b/drivers/soc/mediatek/mtk-dvfsrc.c index 3cbccbb7469a..bf0e7b01d255 100644 --- a/drivers/soc/mediatek/mtk-dvfsrc.c +++ b/drivers/soc/mediatek/mtk-dvfsrc.c @@ -72,6 +72,7 @@ struct mtk_dvfsrc { struct dvfsrc_soc_data { const int *regs; + const bool has_emi_ddr; const struct dvfsrc_opp_desc *opps_desc; u32 (*calc_dram_bw)(struct mtk_dvfsrc *dvfsrc, int type, u64 bw); u32 (*get_target_level)(struct mtk_dvfsrc *dvfsrc); @@ -107,6 +108,7 @@ enum dvfsrc_regs { DVFSRC_SW_BW, DVFSRC_SW_PEAK_BW, DVFSRC_SW_HRT_BW, + DVFSRC_SW_EMI_BW, DVFSRC_VCORE, DVFSRC_REGS_MAX, }; @@ -292,6 +294,9 @@ static void __dvfsrc_set_dram_bw_v1(struct mtk_dvfsrc *dvfsrc, u32 reg, new_bw = max(new_bw, min_bw); dvfsrc_writel(dvfsrc, reg, new_bw); + + if (type == DVFSRC_BW_AVG && dvfsrc->dvd->has_emi_ddr) + dvfsrc_writel(dvfsrc, DVFSRC_SW_EMI_BW, bw); } static void dvfsrc_set_dram_bw_v1(struct mtk_dvfsrc *dvfsrc, u64 bw) |