Re: [v2 3/3] clk: mediatek: Integrate vppsys with mtk-mmsys in MT8195

[Chun-Jie Chen <chun-jie.chen@mediatek.com>]

On Mon, 2022-01-10 at 22:36 +0800, AngeloGioacchino Del Regno wrote:
> Il 10/01/22 01:59, Chun-Jie Chen ha scritto:
> > Integrate vpp0 and vpp1 with mtk-mmsys driver which
> > will populate device by platform_device_register_data
> > to start vppsys clock driver.
> > 
> > Signed-off-by: Chun-Jie Chen <chun-jie.chen@mediatek.com>
> 
> Hello Chun-Jie,
> 
> I agree with this series and I would be happy to give you my R-b, but
> this patch will make these clocks to *never* probe in in the targeted
> kernel version.
> 
> You forgot to mention that this patch will break vpp0/vpp1 clocks
> entirely
> unless applied on top of patch series [1].
> 
> Please, either mention that said series is *required* for this one to
> work
> as expected, or move series [1], patches 6 and 7 to this series
> instead;
> since the MDP3 driver will need quite a while to get merged, I would
> suggest
> to move the patches here, as to get something "complete" to merge.
> 
> [1]: 
> https://urldefense.com/v3/__https://patchwork.kernel.org/project/linux-mediatek/list/?series=568283__;!!CTRNKA9wMg0ARbw!wmrogRswnz6kpeUHCcHn5KDCMwLDf-hiX-e2cPQgx_5-V6YnB_dAbRZRayxp0K_Jbu00$
>  
> 

Thanks for your reminder, I only mention the dependence patch in v1,
but forgot it in v2.


> > ---
> >   drivers/clk/mediatek/clk-mt8195-vpp0.c | 42 +++++++++++++++++--
> > -------
> >   drivers/clk/mediatek/clk-mt8195-vpp1.c | 42 +++++++++++++++++--
> > -------
> >   2 files changed, 56 insertions(+), 28 deletions(-)
> > 
> > diff --git a/drivers/clk/mediatek/clk-mt8195-vpp0.c
> > b/drivers/clk/mediatek/clk-mt8195-vpp0.c
> > index c3241466a8d0..68c375bfce8b 100644
> > --- a/drivers/clk/mediatek/clk-mt8195-vpp0.c
> > +++ b/drivers/clk/mediatek/clk-mt8195-vpp0.c
> > @@ -86,25 +86,39 @@ static const struct mtk_gate vpp0_clks[] = {
> >   	GATE_VPP0_2(CLK_VPP0_WARP1_MDP_DL_ASYNC,
> > "vpp0_warp1_mdp_dl_async", "top_wpe_vpp", 3),
> >   };
> >   
> > -static const struct mtk_clk_desc vpp0_desc = {
> > -	.clks = vpp0_clks,
> > -	.num_clks = ARRAY_SIZE(vpp0_clks),
> > -};
> > +static int clk_mt8195_vpp0_probe(struct platform_device *pdev)
> > +{
> > +	struct device *dev = &pdev->dev;
> > +	struct device_node *node = dev->parent->of_node;
> > +	struct clk_onecell_data *clk_data;
> > +	int r;
> >   
> > -static const struct of_device_id of_match_clk_mt8195_vpp0[] = {
> > -	{
> > -		.compatible = "mediatek,mt8195-vppsys0",
> > -		.data = &vpp0_desc,
> > -	}, {
> > -		/* sentinel */
> > -	}
> > -};
> > +	clk_data = mtk_alloc_clk_data(CLK_VPP0_NR_CLK);
> > +	if (!clk_data)
> > +		return -ENOMEM;
> > +
> > +	r = mtk_clk_register_gates(node, vpp0_clks,
> > ARRAY_SIZE(vpp0_clks), clk_data);
> > +	if (r)
> > +		goto free_vpp0_data;
> > +
> > +	r = of_clk_add_provider(node, of_clk_src_onecell_get,
> > clk_data);
> > +	if (r)
> > +		goto unregister_clk;
> > +
> > +	return r;
> > +
> > +unregister_clk:
> > +	mtk_clk_unregister(clk_data);
> > +
> > +free_vpp0_data:
> > +	mtk_free_clk_data(clk_data);
> > +	return r;
> > +}
> >   
> >   static struct platform_driver clk_mt8195_vpp0_drv = {
> > -	.probe = mtk_clk_simple_probe,
> > +	.probe = clk_mt8195_vpp0_probe,
> >   	.driver = {
> >   		.name = "clk-mt8195-vpp0",
> > -		.of_match_table = of_match_clk_mt8195_vpp0,
> >   	},
> >   };
> >   builtin_platform_driver(clk_mt8195_vpp0_drv);
> > diff --git a/drivers/clk/mediatek/clk-mt8195-vpp1.c
> > b/drivers/clk/mediatek/clk-mt8195-vpp1.c
> > index ce0b9a40a179..237077c60f54 100644
> > --- a/drivers/clk/mediatek/clk-mt8195-vpp1.c
> > +++ b/drivers/clk/mediatek/clk-mt8195-vpp1.c
> > @@ -84,25 +84,39 @@ static const struct mtk_gate vpp1_clks[] = {
> >   	GATE_VPP1_1(CLK_VPP1_VPP_SPLIT_26M, "vpp1_vpp_split_26m",
> > "clk26m", 26),
> >   };
> >   
> > -static const struct mtk_clk_desc vpp1_desc = {
> > -	.clks = vpp1_clks,
> > -	.num_clks = ARRAY_SIZE(vpp1_clks),
> > -};
> > +static int clk_mt8195_vpp1_probe(struct platform_device *pdev)
> > +{
> > +	struct device *dev = &pdev->dev;
> > +	struct device_node *node = dev->parent->of_node;
> > +	struct clk_onecell_data *clk_data;
> > +	int r;
> >   
> > -static const struct of_device_id of_match_clk_mt8195_vpp1[] = {
> > -	{
> > -		.compatible = "mediatek,mt8195-vppsys1",
> > -		.data = &vpp1_desc,
> > -	}, {
> > -		/* sentinel */
> > -	}
> > -};
> > +	clk_data = mtk_alloc_clk_data(CLK_VPP1_NR_CLK);
> > +	if (!clk_data)
> > +		return -ENOMEM;
> > +
> > +	r = mtk_clk_register_gates(node, vpp1_clks,
> > ARRAY_SIZE(vpp1_clks), clk_data);
> > +	if (r)
> > +		goto free_vpp1_data;
> > +
> > +	r = of_clk_add_provider(node, of_clk_src_onecell_get,
> > clk_data);
> > +	if (r)
> > +		goto unregister_clk;
> > +
> > +	return r;
> > +
> > +unregister_clk:
> > +	mtk_clk_unregister(clk_data);
> > +
> > +free_vpp1_data:
> > +	mtk_free_clk_data(clk_data);
> > +	return r;
> > +}
> >   
> >   static struct platform_driver clk_mt8195_vpp1_drv = {
> > -	.probe = mtk_clk_simple_probe,
> > +	.probe = clk_mt8195_vpp1_probe,
> >   	.driver = {
> >   		.name = "clk-mt8195-vpp1",
> > -		.of_match_table = of_match_clk_mt8195_vpp1,
> >   	},
> >   };
> >   builtin_platform_driver(clk_mt8195_vpp1_drv);
> > 
> 
> 
> -- 
> AngeloGioacchino Del Regno
> Software Engineer
> 
> Collabora Ltd.
> Platinum Building, St John's Innovation Park, Cambridge CB4 0DS, UK
> Registered in England & Wales, no. 5513718