Hi, Bibby:
On Wed, 2018-09-05 at 16:31 +0800, Bibby Hsieh wrote:
> From: chunhui dai <chunhui.dai@xxxxxxxxxxxx>
>
> This patch adds hdmi dirver suppot for both MT2701 and MT7623.
> And also support other (existing or future) chips that use
> the same binding and driver.
>
> Signed-off-by: chunhui dai <chunhui.dai@xxxxxxxxxxxx>
> ---
> drivers/gpu/drm/mediatek/Makefile | 1 +
> drivers/gpu/drm/mediatek/mtk_hdmi.h | 1 +
> drivers/gpu/drm/mediatek/mtk_hdmi_phy.c | 3 +
> drivers/gpu/drm/mediatek/mtk_mt2701_hdmi_phy.c | 307 +++++++++++++++++++++++++
> 4 files changed, 312 insertions(+)
> create mode 100644 drivers/gpu/drm/mediatek/mtk_mt2701_hdmi_phy.c
>
> diff --git a/drivers/gpu/drm/mediatek/Makefile b/drivers/gpu/drm/mediatek/Makefile
> index 7f947979d68f..bf0067b5ee6f 100644
> --- a/drivers/gpu/drm/mediatek/Makefile
> +++ b/drivers/gpu/drm/mediatek/Makefile
> @@ -2,6 +2,7 @@
> mediatek-drm-hdmi-objs := mtk_cec.o \
> mtk_hdmi.o \
> mtk_hdmi_ddc.o \
> + mtk_mt2701_hdmi_phy.o \
> mtk_mt8173_hdmi_phy.o \
> mtk_hdmi_phy.o
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.h b/drivers/gpu/drm/mediatek/mtk_hdmi.h
> index a350a6c9271f..fa12eb6288f3 100644
> --- a/drivers/gpu/drm/mediatek/mtk_hdmi.h
> +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.h
> @@ -45,5 +45,6 @@ extern struct platform_driver mtk_cec_driver;
> extern struct platform_driver mtk_hdmi_ddc_driver;
> extern struct platform_driver mtk_hdmi_phy_driver;
> extern struct mtk_hdmi_phy_conf mtk_hdmi_phy_8173_conf;
> +extern struct mtk_hdmi_phy_conf mtk_hdmi_phy_2701_conf;
>
> #endif /* _MTK_HDMI_CTRL_H */
> diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi_phy.c b/drivers/gpu/drm/mediatek/mtk_hdmi_phy.c
> index 82ed73575e04..606fc7a0c13b 100644
> --- a/drivers/gpu/drm/mediatek/mtk_hdmi_phy.c
> +++ b/drivers/gpu/drm/mediatek/mtk_hdmi_phy.c
> @@ -135,6 +135,9 @@ static int mtk_hdmi_phy_remove(struct platform_device *pdev)
> }
>
> static const struct of_device_id mtk_hdmi_phy_match[] = {
> + { .compatible = "mediatek,mt2701-hdmi-phy",
> + .data = &mtk_hdmi_phy_2701_conf,
> + },
> { .compatible = "mediatek,mt8173-hdmi-phy",
> .data = &mtk_hdmi_phy_8173_conf,
> },
> diff --git a/drivers/gpu/drm/mediatek/mtk_mt2701_hdmi_phy.c b/drivers/gpu/drm/mediatek/mtk_mt2701_hdmi_phy.c
> new file mode 100644
> index 000000000000..428ef1557a14
> --- /dev/null
> +++ b/drivers/gpu/drm/mediatek/mtk_mt2701_hdmi_phy.c
> @@ -0,0 +1,307 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (c) 2018 MediaTek Inc.
> + * Author: Chunhui Dai <chunhui.dai@xxxxxxxxxxxx>
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/clk-provider.h>
> +#include <linux/debugfs.h>
Why need debugfs.h?
> +#include <linux/delay.h>
> +#include <linux/kernel.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/module.h>
> +#include <linux/of_platform.h>
> +#include <linux/of.h>
> +#include <linux/platform_device.h>
> +#include <linux/phy/phy.h>
> +#include <linux/slab.h>
> +#include "mtk_hdmi.h"
I don't know why the included file is different in mtk_mt8173_hdmi_phy.c
with this file. The difference of these two files are hardware control,
so I think these two files would include the same header files. If these
two file include the same files, maybe we should move the common include
statement in some header file to prevent duplicate in these two files.
> +
> +#define HDMI_CON0 0x00
> +#define RG_HDMITX_DRV_IBIAS (0)
You need not to embrace a single number.
> +#define RG_HDMITX_DRV_IBIAS_MASK (0x3F << 0)
Use lower case for hex number.
> +#define RG_HDMITX_EN_SER (12)
> +#define RG_HDMITX_EN_SER_MASK (0x0F << 12)
> +#define RG_HDMITX_EN_SLDO (16)
> +#define RG_HDMITX_EN_SLDO_MASK (0x0F << 16)
> +#define RG_HDMITX_EN_PRED (20)
> +#define RG_HDMITX_EN_PRED_MASK (0x0F << 20)
> +#define RG_HDMITX_EN_IMP (24)
> +#define RG_HDMITX_EN_IMP_MASK (0x0F << 24)
> +#define RG_HDMITX_EN_DRV (28)
> +#define RG_HDMITX_EN_DRV_MASK (0x0F << 28)
> +
> +#define HDMI_CON1 0x04
> +#define RG_HDMITX_PRED_IBIAS (18)
> +#define RG_HDMITX_PRED_IBIAS_MASK (0x0F << 18)
> +#define RG_HDMITX_PRED_IMP (0x01 << 22)
> +#define RG_HDMITX_DRV_IMP (26)
> +#define RG_HDMITX_DRV_IMP_MASK (0x3F << 26)
> +
> +#define HDMI_CON2 0x08
> +#define RG_HDMITX_EN_TX_CKLDO (0x01 << 0)
> +#define RG_HDMITX_EN_TX_POSDIV (0x01 << 1)
> +#define RG_HDMITX_TX_POSDIV (3)
> +#define RG_HDMITX_TX_POSDIV_MASK (0x03 << 3)
> +#define RG_HDMITX_EN_MBIAS (0x01 << 6)
> +#define RG_HDMITX_MBIAS_LPF_EN (0x01 << 7)
> +
> +#define HDMI_CON4 0x10
> +#define RG_HDMITX_RESERVE_MASK (0xFFFFFFFF << 0)
> +
> +#define HDMI_CON6 0x18
> +#define RG_HTPLL_BR (0)
> +#define RG_HTPLL_BR_MASK (0x03 << 0)
> +#define RG_HTPLL_BC (2)
> +#define RG_HTPLL_BC_MASK (0x03 << 2)
> +#define RG_HTPLL_BP (4)
> +#define RG_HTPLL_BP_MASK (0x0F << 4)
> +#define RG_HTPLL_IR (8)
> +#define RG_HTPLL_IR_MASK (0x0F << 8)
> +#define RG_HTPLL_IC (12)
> +#define RG_HTPLL_IC_MASK (0x0F << 12)
> +#define RG_HTPLL_POSDIV (16)
> +#define RG_HTPLL_POSDIV_MASK (0x03 << 16)
> +#define RG_HTPLL_PREDIV (18)
> +#define RG_HTPLL_PREDIV_MASK (0x03 << 18)
> +#define RG_HTPLL_FBKSEL (20)
> +#define RG_HTPLL_FBKSEL_MASK (0x03 << 20)
> +#define RG_HTPLL_RLH_EN (0x01 << 22)
> +#define RG_HTPLL_FBKDIV (24)
> +#define RG_HTPLL_FBKDIV_MASK (0x7F << 24)
> +#define RG_HTPLL_EN (0x01 << 31)
> +
> +#define HDMI_CON7 0x1c
> +#define RG_HTPLL_AUTOK_EN (0x01 << 23)
> +#define RG_HTPLL_DIVEN (28)
> +#define RG_HTPLL_DIVEN_MASK (0x07 << 28)
> +
> +static inline struct mtk_hdmi_phy *to_mtk_hdmi_pll(struct clk_hw *hw)
> +{
> + return container_of(hw, struct mtk_hdmi_phy, pll_hw);
> +}
to_mtk_hdmi_pll() is the same as to_mtk_hdmi_phy() in
mtk_mt8173_hdmi_phy.c, I would like the merge these two functions. Maybe
you could these common function to a .h or .c file.
> +
> +static inline void mtk_hdmi_pll_mask(struct mtk_hdmi_phy *hdmi_phy, u32 offset,
> + u32 val, u32 mask)
> +{
> + u32 tmp = readl(hdmi_phy->regs + offset) & ~mask;
> +
> + tmp |= (val & mask);
> + writel(tmp, hdmi_phy->regs + offset);
> +}
Ditto.
> +
> +static int mtk_hdmi_pll_enable(struct clk_hw *hw)
> +{
> + struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_pll(hw);
> +
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON7, RG_HTPLL_AUTOK_EN,
> + RG_HTPLL_AUTOK_EN);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON6, 0, RG_HTPLL_RLH_EN);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON6, (0x3 << RG_HTPLL_POSDIV),
> + RG_HTPLL_POSDIV_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON2, RG_HDMITX_EN_MBIAS,
> + RG_HDMITX_EN_MBIAS);
> + usleep_range(80, 100);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON6, RG_HTPLL_EN, RG_HTPLL_EN);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON2, RG_HDMITX_EN_TX_CKLDO,
> + RG_HDMITX_EN_TX_CKLDO);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON0, (0xf << RG_HDMITX_EN_SLDO),
> + RG_HDMITX_EN_SLDO_MASK);
> + usleep_range(80, 100);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON2, RG_HDMITX_MBIAS_LPF_EN,
> + RG_HDMITX_MBIAS_LPF_EN);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON2, RG_HDMITX_EN_TX_POSDIV,
> + RG_HDMITX_EN_TX_POSDIV);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON0, (0xf << RG_HDMITX_EN_SER),
> + RG_HDMITX_EN_SER_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON0, (0xf << RG_HDMITX_EN_PRED),
> + RG_HDMITX_EN_PRED_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON0, (0xf << RG_HDMITX_EN_DRV),
> + RG_HDMITX_EN_DRV_MASK);
> + usleep_range(80, 100);
> + return 0;
> +}
> +
> +static void mtk_hdmi_pll_disable(struct clk_hw *hw)
> +{
> + struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_pll(hw);
> +
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON0, 0, RG_HDMITX_EN_DRV_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON0, 0, RG_HDMITX_EN_PRED_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON0, 0, RG_HDMITX_EN_SER_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON2, 0, RG_HDMITX_EN_TX_POSDIV);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON2, 0, RG_HDMITX_MBIAS_LPF_EN);
> + usleep_range(80, 100);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON0, 0, RG_HDMITX_EN_SLDO_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON2, 0, RG_HDMITX_EN_TX_CKLDO);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON6, 0, RG_HTPLL_EN);
> + usleep_range(80, 100);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON2, 0, RG_HDMITX_EN_MBIAS);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON6, 0, RG_HTPLL_POSDIV_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON6, 0, RG_HTPLL_RLH_EN);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON7, 0, RG_HTPLL_AUTOK_EN);
> + usleep_range(80, 100);
> +}
> +
> +static int mtk_hdmi_pll_set_rate(struct clk_hw *hw, unsigned long rate,
> + unsigned long parent_rate)
> +{
> + struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_pll(hw);
> + u32 pos_div;
> +
> + if (rate <= 64000000)
> + pos_div = 3;
> + else if (rate <= 12800000)
> + pos_div = 1;
> + else
> + pos_div = 1;
> +
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON6, (0x3 << RG_HTPLL_PREDIV),
> + RG_HTPLL_PREDIV_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON6, (0x3 << RG_HTPLL_POSDIV),
> + RG_HTPLL_POSDIV_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON6, (0x1 << RG_HTPLL_IC),
> + RG_HTPLL_IC_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON6, (0x1 << RG_HTPLL_IR),
> + RG_HTPLL_IR_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON2, (pos_div << RG_HDMITX_TX_POSDIV),
> + RG_HDMITX_TX_POSDIV_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON6, (1 << RG_HTPLL_FBKSEL),
> + RG_HTPLL_FBKSEL_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON6, (19 << RG_HTPLL_FBKDIV),
> + RG_HTPLL_FBKDIV_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON7, (0x2 << RG_HTPLL_DIVEN),
> + RG_HTPLL_DIVEN_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON6, (0xc << RG_HTPLL_BP),
> + RG_HTPLL_BP_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON6, (0x2 << RG_HTPLL_BC),
> + RG_HTPLL_BC_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON6, (0x1 << RG_HTPLL_BR),
> + RG_HTPLL_BR_MASK);
> +
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON1, 0, RG_HDMITX_PRED_IMP);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON1, (0x3 << RG_HDMITX_PRED_IBIAS),
> + RG_HDMITX_PRED_IBIAS_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON0, (0x0 << RG_HDMITX_EN_IMP),
> + RG_HDMITX_EN_IMP_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON1, (0x28 << RG_HDMITX_DRV_IMP),
> + RG_HDMITX_DRV_IMP_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON4, 0x28, RG_HDMITX_RESERVE_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON0, (0xa << RG_HDMITX_DRV_IBIAS),
> + RG_HDMITX_DRV_IBIAS_MASK);
> + return 0;
> +}
> +
> +static long mtk_hdmi_pll_round_rate(struct clk_hw *hw, unsigned long rate,
> + unsigned long *parent_rate)
> +{
> + struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_pll(hw);
> +
> + hdmi_phy->pll_rate = rate;
In mtk_mt8173_hdmi_phy.c, mtk_hdmi_pll_round_rate adjust the
parent_rate, so mt2701 need not to adjust?
> + return rate;
> +}
> +
> +static unsigned long mtk_hdmi_pll_recalc_rate(struct clk_hw *hw,
> + unsigned long parent_rate)
> +{
> + struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_pll(hw);
> +
> + return hdmi_phy->pll_rate;
> +}
> +
> +static const struct clk_ops mtk_hdmi_phy_pll_ops = {
> + .enable = mtk_hdmi_pll_enable,
> + .disable = mtk_hdmi_pll_disable,
Why mt2701 implement enable/disable, but mt8173 implement
prepare/unprepare? I would like these two use the same method. If these
two would be different, describe 'why' in commit message.
> + .set_rate = mtk_hdmi_pll_set_rate,
> + .round_rate = mtk_hdmi_pll_round_rate,
> + .recalc_rate = mtk_hdmi_pll_recalc_rate,
> +};
> +
> +static void mtk_hdmi_phy_enable_tmds(struct mtk_hdmi_phy *hdmi_phy)
> +{
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON7, RG_HTPLL_AUTOK_EN,
> + RG_HTPLL_AUTOK_EN);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON6, 0, RG_HTPLL_RLH_EN);
In mtk_mt8173_hdmi_phy.c, it define mtk_hdmi_phy_set_bits() and
mtk_hdmi_phy_clear_bits(). I think we could reuse it to reduce the code
size.
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON6, (0x3 << RG_HTPLL_POSDIV),
> + RG_HTPLL_POSDIV_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON2, RG_HDMITX_EN_MBIAS,
> + RG_HDMITX_EN_MBIAS);
> + usleep_range(80, 100);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON6, RG_HTPLL_EN, RG_HTPLL_EN);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON2, RG_HDMITX_EN_TX_CKLDO,
> + RG_HDMITX_EN_TX_CKLDO);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON0, (0xf << RG_HDMITX_EN_SLDO),
> + RG_HDMITX_EN_SLDO_MASK);
> + usleep_range(80, 100);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON2, RG_HDMITX_MBIAS_LPF_EN,
> + RG_HDMITX_MBIAS_LPF_EN);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON2, RG_HDMITX_EN_TX_POSDIV,
> + RG_HDMITX_EN_TX_POSDIV);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON0, (0xf << RG_HDMITX_EN_SER),
> + RG_HDMITX_EN_SER_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON0, (0xf << RG_HDMITX_EN_PRED),
> + RG_HDMITX_EN_PRED_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON0, (0xf << RG_HDMITX_EN_DRV),
> + RG_HDMITX_EN_DRV_MASK);
> + usleep_range(80, 100);
> +}
> +
> +static void mtk_hdmi_phy_disable_tmds(struct mtk_hdmi_phy *hdmi_phy)
> +{
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON0, 0, RG_HDMITX_EN_DRV_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON0, 0, RG_HDMITX_EN_PRED_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON0, 0, RG_HDMITX_EN_SER_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON2, 0, RG_HDMITX_EN_TX_POSDIV);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON2, 0, RG_HDMITX_MBIAS_LPF_EN);
> + usleep_range(80, 100);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON0, 0, RG_HDMITX_EN_SLDO_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON2, 0, RG_HDMITX_EN_TX_CKLDO);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON6, 0, RG_HTPLL_EN);
> + usleep_range(80, 100);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON2, 0, RG_HDMITX_EN_MBIAS);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON6, 0, RG_HTPLL_POSDIV_MASK);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON6, 0, RG_HTPLL_RLH_EN);
> + mtk_hdmi_pll_mask(hdmi_phy, HDMI_CON7, 0, RG_HTPLL_AUTOK_EN);
> + usleep_range(80, 100);
> +}
> +
> +static int mtk_hdmi_phy_power_on(struct phy *phy)
> +{
> + struct mtk_hdmi_phy *hdmi_phy = phy_get_drvdata(phy);
> + int ret;
> +
> + ret = clk_prepare_enable(hdmi_phy->pll);
> + if (ret < 0)
> + return ret;
> +
> + mtk_hdmi_phy_enable_tmds(hdmi_phy);
> +
> + return 0;
> +}
> +
> +static int mtk_hdmi_phy_power_off(struct phy *phy)
> +{
> + struct mtk_hdmi_phy *hdmi_phy = phy_get_drvdata(phy);
> +
> + mtk_hdmi_phy_disable_tmds(hdmi_phy);
> + clk_disable_unprepare(hdmi_phy->pll);
> +
> + return 0;
> +}
> +
> +static const struct phy_ops mtk_hdmi_phy_dev_ops = {
> + .power_on = mtk_hdmi_phy_power_on,
> + .power_off = mtk_hdmi_phy_power_off,
> + .owner = THIS_MODULE,
> +};
mtk_hdmi_phy_power_on(), mtk_hdmi_phy_power_off(), mtk_hdmi_phy_dev_ops
is the same as those in mtk_mt8173_hdmi_phy.c, so I think you should
merge them to prevent duplicate code.
Regards,
CK
> +
> +struct mtk_hdmi_phy_conf mtk_hdmi_phy_2701_conf = {
> + .tz_enabled = false,
> + .hdmi_phy_clk_ops = &mtk_hdmi_phy_pll_ops,
> + .hdmi_phy_dev_ops = &mtk_hdmi_phy_dev_ops,
> +};
> +
> +MODULE_AUTHOR("Chunhui Dai <chunhui.dai@xxxxxxxxxxxx>");
> +MODULE_DESCRIPTION("MediaTek HDMI PHY Driver");
> +MODULE_LICENSE("GPL v2");
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