From: Matthias Brugger <matthias.bgg@gmail.com>
To: Enric Balletbo i Serra <enric.balletbo@collabora.com>,
matthias.bgg@kernel.org, robh+dt@kernel.org,
mark.rutland@arm.com, ck.hu@mediatek.com, p.zabel@pengutronix.de,
airlied@linux.ie, mturquette@baylibre.com, sboyd@kernel.org,
ulrich.hecht+renesas@gmail.com,
laurent.pinchart@ideasonboard.com
Cc: sean.wang@mediatek.com, sean.wang@kernel.org,
rdunlap@infradead.org, wens@csie.org, hsinyi@chromium.org,
frank-w@public-files.de, drinkcat@chromium.org,
linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, linux-clk@vger.kernel.org,
devicetree@vger.kernel.org, mbrugger@suse.com
Subject: Re: [resend PATCH v6 04/12] drm: mediatek: Omit warning on probe defers
Date: Thu, 13 Feb 2020 19:58:16 +0100 [thread overview]
Message-ID: <64cca307-0045-7f82-9916-fa45095be2c2@gmail.com> (raw)
In-Reply-To: <48f9ec0c-1f1e-5a6c-283b-7efc4ce1bd5e@collabora.com>
On 09/12/2019 10:39, Enric Balletbo i Serra wrote:
> Hi Matthias,
>
> On 7/12/19 23:47, matthias.bgg@kernel.org wrote:
>> From: Matthias Brugger <mbrugger@suse.com>
>>
>> It can happen that the mmsys clock drivers aren't probed before the
>> platform driver gets invoked. The platform driver used to print a warning
>> that the driver failed to get the clocks. Omit this error on
>> the defered probe path.
>>
>> Signed-off-by: Matthias Brugger <mbrugger@suse.com>
>> ---
>> drivers/gpu/drm/mediatek/mtk_disp_color.c | 5 ++++-
>> drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 5 ++++-
>> drivers/gpu/drm/mediatek/mtk_disp_rdma.c | 5 ++++-
>> drivers/gpu/drm/mediatek/mtk_dpi.c | 12 +++++++++---
>> drivers/gpu/drm/mediatek/mtk_drm_ddp.c | 4 +++-
>> drivers/gpu/drm/mediatek/mtk_dsi.c | 8 ++++++--
>> drivers/gpu/drm/mediatek/mtk_hdmi.c | 4 +++-
>> 7 files changed, 33 insertions(+), 10 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_color.c b/drivers/gpu/drm/mediatek/mtk_disp_color.c
>> index 59de2a46aa49..8f0fc96ef7bc 100644
>> --- a/drivers/gpu/drm/mediatek/mtk_disp_color.c
>> +++ b/drivers/gpu/drm/mediatek/mtk_disp_color.c
>> @@ -118,7 +118,10 @@ static int mtk_disp_color_probe(struct platform_device *pdev)
>> ret = mtk_ddp_comp_init(dev, dev->of_node, &priv->ddp_comp, comp_id,
>> &mtk_disp_color_funcs);
>> if (ret) {
>> - dev_err(dev, "Failed to initialize component: %d\n", ret);
>> + if (ret != -EPROBE_DEFER)
>> + dev_err(dev, "Failed to initialize component: %d\n",
>> + ret);
>> +
>> return ret;
>> }
>>
>> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
>> index 21851756c579..7487b0182c05 100644
>> --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
>> +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
>> @@ -285,7 +285,10 @@ static int mtk_disp_ovl_probe(struct platform_device *pdev)
>> ret = mtk_ddp_comp_init(dev, dev->of_node, &priv->ddp_comp, comp_id,
>> &mtk_disp_ovl_funcs);
>> if (ret) {
>> - dev_err(dev, "Failed to initialize component: %d\n", ret);
>> + if (ret != -EPROBE_DEFER)
>> + dev_err(dev, "Failed to initialize component: %d\n",
>> + ret);
>> +
>> return ret;
>> }
>>
>> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_rdma.c b/drivers/gpu/drm/mediatek/mtk_disp_rdma.c
>> index 405afef31407..835ea8f8dab9 100644
>> --- a/drivers/gpu/drm/mediatek/mtk_disp_rdma.c
>> +++ b/drivers/gpu/drm/mediatek/mtk_disp_rdma.c
>> @@ -287,7 +287,10 @@ static int mtk_disp_rdma_probe(struct platform_device *pdev)
>> ret = mtk_ddp_comp_init(dev, dev->of_node, &priv->ddp_comp, comp_id,
>> &mtk_disp_rdma_funcs);
>> if (ret) {
>> - dev_err(dev, "Failed to initialize component: %d\n", ret);
>> + if (ret != -EPROBE_DEFER)
>> + dev_err(dev, "Failed to initialize component: %d\n",
>> + ret);
>> +
>> return ret;
>> }
>>
>> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
>> index be6d95c5ff25..9ed32470ad02 100644
>> --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
>> +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
>> @@ -700,21 +700,27 @@ static int mtk_dpi_probe(struct platform_device *pdev)
>> dpi->engine_clk = devm_clk_get(dev, "engine");
>> if (IS_ERR(dpi->engine_clk)) {
>> ret = PTR_ERR(dpi->engine_clk);
>> - dev_err(dev, "Failed to get engine clock: %d\n", ret);
>> + if (ret != -EPROBE_DEFER)
>> + dev_err(dev, "Failed to get engine clock: %d\n", ret);
>
> This is only to print an error and I think that devm_clk_get will print a
> warning if the clk is not found. I guess that you can just remove the dev_err
> print logic, here and below.
>
I didn't follow all the paths, but at least devres_alloc in devm_clk_get isn't
able to alloc the memory, it will silently return -ENOMEM. So I think it is OK
to print an error message here.
Regards,
Matthias
> In case there is an optional clock you could use devm_clk_get_optional, not sure
> if there is any, though.
>
>> +
>> return ret;
>> }
>>
>> dpi->pixel_clk = devm_clk_get(dev, "pixel");
>> if (IS_ERR(dpi->pixel_clk)) {
>> ret = PTR_ERR(dpi->pixel_clk);
>> - dev_err(dev, "Failed to get pixel clock: %d\n", ret);
>> + if (ret != -EPROBE_DEFER)
>> + dev_err(dev, "Failed to get pixel clock: %d\n", ret);
>> +
>
> ditto
>
>> return ret;
>> }
>>
>> dpi->tvd_clk = devm_clk_get(dev, "pll");
>> if (IS_ERR(dpi->tvd_clk)) {
>> ret = PTR_ERR(dpi->tvd_clk);
>> - dev_err(dev, "Failed to get tvdpll clock: %d\n", ret);
>> + if (ret != -EPROBE_DEFER)
>> + dev_err(dev, "Failed to get tvdpll clock: %d\n", ret);
>> +
>
> ditto
>
>> return ret;
>> }
>>
>> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
>> index b765181223e6..6054e2b675f9 100644
>> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
>> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
>> @@ -558,7 +558,9 @@ static int mtk_ddp_probe(struct platform_device *pdev)
>>
>> ddp->clk = devm_clk_get(dev, NULL);
>> if (IS_ERR(ddp->clk)) {
>> - dev_err(dev, "Failed to get clock\n");
>> + if (PTR_ERR(ddp->clk) != -EPROBE_DEFER)
>> + dev_err(dev, "Failed to get clock\n");
>> +
>
> ditto
>
>> return PTR_ERR(ddp->clk);
>> }
>>
>> diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
>> index 4332563df952..66d5b0fdd678 100644
>> --- a/drivers/gpu/drm/mediatek/mtk_dsi.c
>> +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
>> @@ -1110,14 +1110,18 @@ static int mtk_dsi_probe(struct platform_device *pdev)
>> dsi->engine_clk = devm_clk_get(dev, "engine");
>> if (IS_ERR(dsi->engine_clk)) {
>> ret = PTR_ERR(dsi->engine_clk);
>> - dev_err(dev, "Failed to get engine clock: %d\n", ret);
>> + if (ret != -EPROBE_DEFER)
>> + dev_err(dev, "Failed to get engine clock: %d\n", ret);
>> +
>
> ditto
>
>> return ret;
>> }
>>
>> dsi->digital_clk = devm_clk_get(dev, "digital");
>> if (IS_ERR(dsi->digital_clk)) {
>> ret = PTR_ERR(dsi->digital_clk);
>> - dev_err(dev, "Failed to get digital clock: %d\n", ret);
>> + if (ret != -EPROBE_DEFER)
>> + dev_err(dev, "Failed to get digital clock: %d\n", ret);
>> +
>
> ditto
>
>> return ret;
>> }
>>
>> diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
>> index ce91b61364eb..62f9ca2308ee 100644
>> --- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
>> +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
>> @@ -1447,7 +1447,9 @@ static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
>>
>> ret = mtk_hdmi_get_all_clk(hdmi, np);
>> if (ret) {
>> - dev_err(dev, "Failed to get clocks: %d\n", ret);
>> + if (ret != -EPROBE_DEFER)
>> + dev_err(dev, "Failed to get clocks: %d\n", ret);
>> +
>> return ret;
>> }
>>
>>
next prev parent reply other threads:[~2020-02-13 18:58 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-07 22:47 [resend PATCH v6 00/12] arm/arm64: mediatek: Fix mmsys device probing matthias.bgg
2019-12-07 22:47 ` [resend PATCH v6 01/12] dt-bindings: display: mediatek: Add mmsys binding description matthias.bgg
2019-12-09 5:12 ` CK Hu
2019-12-09 8:48 ` Enric Balletbo i Serra
2020-02-13 18:17 ` Matthias Brugger
2019-12-18 16:39 ` Rob Herring
2019-12-07 22:47 ` [resend PATCH v6 02/12] dt-bindings: mediatek: Add compatible for mt7623 matthias.bgg
2019-12-09 8:51 ` Enric Balletbo i Serra
2019-12-18 17:02 ` Rob Herring
2019-12-07 22:47 ` [resend PATCH v6 03/12] drm/mediatek: Use regmap for register access matthias.bgg
2019-12-09 5:16 ` CK Hu
2019-12-07 22:47 ` [resend PATCH v6 04/12] drm: mediatek: Omit warning on probe defers matthias.bgg
2019-12-09 5:19 ` CK Hu
2019-12-09 9:39 ` Enric Balletbo i Serra
2020-02-13 18:58 ` Matthias Brugger [this message]
2019-12-07 22:47 ` [resend PATCH v6 05/12] media: mtk-mdp: Check return value of of_clk_get matthias.bgg
2019-12-09 9:50 ` Enric Balletbo i Serra
2019-12-07 22:47 ` [resend PATCH v6 06/12] clk: mediatek: mt2701: switch mmsys to platform device probing matthias.bgg
2019-12-09 9:58 ` Enric Balletbo i Serra
2020-02-13 19:11 ` Matthias Brugger
2019-12-07 22:47 ` [resend PATCH v6 07/12] clk: mediatek: mt2712e: switch " matthias.bgg
2019-12-09 9:59 ` Enric Balletbo i Serra
2019-12-07 22:47 ` [resend PATCH v6 08/12] clk: mediatek: mt6779: switch mmsys " matthias.bgg
2019-12-09 10:01 ` Enric Balletbo i Serra
2019-12-07 22:47 ` [resend PATCH v6 09/12] clk: mediatek: mt6797: switch " matthias.bgg
2019-12-07 22:47 ` [resend PATCH v6 10/12] clk: mediatek: mt8183: switch mmsys " matthias.bgg
2019-12-09 8:51 ` CK Hu
2020-02-13 19:35 ` Matthias Brugger
2019-12-07 22:47 ` [resend PATCH v6 11/12] clk: mediatek: mt8173: " matthias.bgg
2019-12-07 22:47 ` [resend PATCH v6 12/12] drm/mediatek: Add support for mmsys through a pdev matthias.bgg
2019-12-09 5:34 ` CK Hu
2020-02-13 19:46 ` Matthias Brugger
2019-12-09 10:15 ` Enric Balletbo i Serra
2020-02-13 2:57 ` [resend PATCH v6 00/12] arm/arm64: mediatek: Fix mmsys device probing CK Hu
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