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Message-ID: <7345cb90-b63d-5461-d97c-89ef563dc421@baylibre.com>
Date: Tue, 11 Dec 2018 10:21:40 +0100
From: Neil Armstrong <narmstrong@...libre.com>
To: Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
linux-amlogic@...ts.infradead.org, linux-clk@...r.kernel.org,
jbrunet@...libre.com, khilman@...libre.com, robh+dt@...nel.org
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org, dri-devel@...ts.freedesktop.org,
sboyd@...nel.org, mturquette@...libre.com
Subject: Re: [PATCH 3/5] clk: meson: meson8b: add the GPU clock tree
On 08/12/2018 18:12, Martin Blumenstingl wrote:
> Add the GPU clock tree on Meson8, Meson8b and Meson8m2.
>
> The GPU clock tree on Meson8b and Meson8m2 is almost identical to the
> one one GXBB:
> - there's a glitch-free mux at HHI_MALI_CLK_CNTL[31]
> - there are two identical parents for this mux: mali_0 and mali_1, each
> with a gate, divider and mux
> - the parents of mali_0_sel and mali_1_sel are identical to GXBB except
> there's no GP0_PLL on these 32-bit SoCs
>
> Meson8 is different because it does not have the glitch-free mux.
> Instead if only has the mali_0 clock tree. The parents of mali_0_sel are
> identical to the ones on Meson8b and Meson8m2.
>
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
> ---
> drivers/clk/meson/meson8b.c | 146 ++++++++++++++++++++++++++++++++++++
> drivers/clk/meson/meson8b.h | 9 ++-
> 2 files changed, 154 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/clk/meson/meson8b.c b/drivers/clk/meson/meson8b.c
> index 0b9353d8d4fd..748552c5f6c8 100644
> --- a/drivers/clk/meson/meson8b.c
> +++ b/drivers/clk/meson/meson8b.c
> @@ -1573,6 +1573,135 @@ static struct clk_regmap meson8b_hdmi_sys = {
> },
> };
>
> +/*
> + * The MALI IP is clocked by two identical clocks (mali_0 and mali_1)
> + * muxed by a glitch-free switch on Meson8b and Meson8m2. Meson8 only
> + * has mali_0 and no glitch-free mux.
> + */
> +static const char * const meson8b_mali_0_1_parent_names[] = {
> + "xtal", "mpll2", "mpll1", "fclk_div7", "fclk_div4", "fclk_div3",
> + "fclk_div5"
> +};
> +
> +static u32 meson8b_mali_0_1_mux_table[] = { 0, 2, 3, 4, 5, 6, 7 };
> +
> +static struct clk_regmap meson8b_mali_0_sel = {
> + .data = &(struct clk_regmap_mux_data){
> + .offset = HHI_MALI_CLK_CNTL,
> + .mask = 0x7,
> + .shift = 9,
> + .table = meson8b_mali_0_1_mux_table,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "mali_0_sel",
> + .ops = &clk_regmap_mux_ops,
> + .parent_names = meson8b_mali_0_1_parent_names,
> + .num_parents = ARRAY_SIZE(meson8b_mali_0_1_parent_names),
> + /*
> + * Don't propagate rate changes up because the only changeable
> + * parents are mpll1 and mpll2 but we need those for audio and
> + * RGMII (Ethernet). We don't want to change the audio or
> + * Ethernet clocks when setting the GPU frequency.
> + */
> + .flags = 0,
> + },
> +};
> +
> +static struct clk_regmap meson8b_mali_0_div = {
> + .data = &(struct clk_regmap_div_data){
> + .offset = HHI_MALI_CLK_CNTL,
> + .shift = 0,
> + .width = 7,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "mali_0_div",
> + .ops = &clk_regmap_divider_ops,
> + .parent_names = (const char *[]){ "mali_0_sel" },
> + .num_parents = 1,
> + .flags = CLK_SET_RATE_PARENT,
> + },
> +};
> +
> +static struct clk_regmap meson8b_mali_0 = {
> + .data = &(struct clk_regmap_gate_data){
> + .offset = HHI_MALI_CLK_CNTL,
> + .bit_idx = 8,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "mali_0",
> + .ops = &clk_regmap_gate_ops,
> + .parent_names = (const char *[]){ "mali_0_div" },
> + .num_parents = 1,
> + .flags = CLK_SET_RATE_PARENT,
> + },
> +};
> +
> +static struct clk_regmap meson8b_mali_1_sel = {
> + .data = &(struct clk_regmap_mux_data){
> + .offset = HHI_MALI_CLK_CNTL,
> + .mask = 0x7,
> + .shift = 25,
> + .table = meson8b_mali_0_1_mux_table,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "mali_1_sel",
> + .ops = &clk_regmap_mux_ops,
> + .parent_names = meson8b_mali_0_1_parent_names,
> + .num_parents = ARRAY_SIZE(meson8b_mali_0_1_parent_names),
> + /*
> + * Don't propagate rate changes up because the only changeable
> + * parents are mpll1 and mpll2 but we need those for audio and
> + * RGMII (Ethernet). We don't want to change the audio or
> + * Ethernet clocks when setting the GPU frequency.
> + */
> + .flags = 0,
> + },
> +};
> +
> +static struct clk_regmap meson8b_mali_1_div = {
> + .data = &(struct clk_regmap_div_data){
> + .offset = HHI_MALI_CLK_CNTL,
> + .shift = 16,
> + .width = 7,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "mali_1_div",
> + .ops = &clk_regmap_divider_ops,
> + .parent_names = (const char *[]){ "mali_1_sel" },
> + .num_parents = 1,
> + .flags = CLK_SET_RATE_PARENT,
> + },
> +};
> +
> +static struct clk_regmap meson8b_mali_1 = {
> + .data = &(struct clk_regmap_gate_data){
> + .offset = HHI_MALI_CLK_CNTL,
> + .bit_idx = 24,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "mali_1",
> + .ops = &clk_regmap_gate_ops,
> + .parent_names = (const char *[]){ "mali_1_div" },
> + .num_parents = 1,
> + .flags = CLK_SET_RATE_PARENT,
> + },
> +};
> +
> +static struct clk_regmap meson8b_mali = {
> + .data = &(struct clk_regmap_mux_data){
> + .offset = HHI_MALI_CLK_CNTL,
> + .mask = 1,
> + .shift = 31,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "mali",
> + .ops = &clk_regmap_mux_ops,
> + .parent_names = (const char *[]){ "mali_0", "mali_1" },
> + .num_parents = 2,
> + .flags = CLK_SET_RATE_PARENT,
> + },
> +};
> +
> /* Everything Else (EE) domain gates */
>
> static MESON_GATE(meson8b_ddr, HHI_GCLK_MPEG0, 0);
> @@ -1833,6 +1962,9 @@ static struct clk_hw_onecell_data meson8_hw_onecell_data = {
> [CLKID_HDMI_SYS_SEL] = &meson8b_hdmi_sys_sel.hw,
> [CLKID_HDMI_SYS_DIV] = &meson8b_hdmi_sys_div.hw,
> [CLKID_HDMI_SYS] = &meson8b_hdmi_sys.hw,
> + [CLKID_MALI_0_SEL] = &meson8b_mali_0_sel.hw,
> + [CLKID_MALI_0_DIV] = &meson8b_mali_0_div.hw,
> + [CLKID_MALI] = &meson8b_mali_0.hw,
> [CLK_NR_CLKS] = NULL,
> },
> .num = CLK_NR_CLKS,
> @@ -2012,6 +2144,13 @@ static struct clk_hw_onecell_data meson8b_hw_onecell_data = {
> [CLKID_HDMI_SYS_SEL] = &meson8b_hdmi_sys_sel.hw,
> [CLKID_HDMI_SYS_DIV] = &meson8b_hdmi_sys_div.hw,
> [CLKID_HDMI_SYS] = &meson8b_hdmi_sys.hw,
> + [CLKID_MALI_0_SEL] = &meson8b_mali_0_sel.hw,
> + [CLKID_MALI_0_DIV] = &meson8b_mali_0_div.hw,
> + [CLKID_MALI_0] = &meson8b_mali_0.hw,
> + [CLKID_MALI_1_SEL] = &meson8b_mali_1_sel.hw,
> + [CLKID_MALI_1_DIV] = &meson8b_mali_1_div.hw,
> + [CLKID_MALI_1] = &meson8b_mali_1.hw,
> + [CLKID_MALI] = &meson8b_mali.hw,
> [CLK_NR_CLKS] = NULL,
> },
> .num = CLK_NR_CLKS,
> @@ -2167,6 +2306,13 @@ static struct clk_regmap *const meson8b_clk_regmaps[] = {
> &meson8b_hdmi_sys_sel,
> &meson8b_hdmi_sys_div,
> &meson8b_hdmi_sys,
> + &meson8b_mali_0_sel,
> + &meson8b_mali_0_div,
> + &meson8b_mali_0,
> + &meson8b_mali_1_sel,
> + &meson8b_mali_1_div,
> + &meson8b_mali_1,
> + &meson8b_mali,
> };
>
> static const struct meson8b_clk_reset_line {
> diff --git a/drivers/clk/meson/meson8b.h b/drivers/clk/meson/meson8b.h
> index 87fba739af81..f212e2304ff5 100644
> --- a/drivers/clk/meson/meson8b.h
> +++ b/drivers/clk/meson/meson8b.h
> @@ -33,6 +33,7 @@
> #define HHI_VID_CLK_CNTL2 0x194 /* 0x65 offset in data sheet */
> #define HHI_VID_DIVIDER_CNTL 0x198 /* 0x66 offset in data sheet */
> #define HHI_SYS_CPU_CLK_CNTL0 0x19c /* 0x67 offset in data sheet */
> +#define HHI_MALI_CLK_CNTL 0x1b0 /* 0x6c offset in data sheet */
> #define HHI_HDMI_CLK_CNTL 0x1cc /* 0x73 offset in data sheet */
> #define HHI_NAND_CLK_CNTL 0x25c /* 0x97 offset in data sheet */
> #define HHI_MPLL_CNTL 0x280 /* 0xa0 offset in data sheet */
> @@ -139,8 +140,14 @@
> #define CLKID_HDMI_SYS_SEL 172
> #define CLKID_HDMI_SYS_DIV 173
> #define CLKID_HDMI_SYS 174
> +#define CLKID_MALI_0_SEL 175
> +#define CLKID_MALI_0_DIV 176
> +#define CLKID_MALI_0 177
> +#define CLKID_MALI_1_SEL 178
> +#define CLKID_MALI_1_DIV 179
> +#define CLKID_MALI_1 180
>
> -#define CLK_NR_CLKS 175
> +#define CLK_NR_CLKS 181
>
> /*
> * include the CLKID and RESETID that have
>
Reviewed-by: Neil Armstrong <narmstrong@...libre.com>
Changing mali clock for Meson8 will be fun aswell !
How amlogic does that ? the only change the divider ?
Neil
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