From: Rex-BC Chen <rex-bc.chen@mediatek.com>
To: Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
<granquet@baylibre.com>
Cc: <airlied@linux.ie>, <chunfeng.yun@mediatek.com>,
<chunkuang.hu@kernel.org>, <ck.hu@mediatek.com>,
<daniel@ffwll.ch>, <deller@gmx.de>, <devicetree@vger.kernel.org>,
<dri-devel@lists.freedesktop.org>, <jitao.shi@mediatek.com>,
<kishon@ti.com>, <krzysztof.kozlowski+dt@linaro.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-fbdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<linux-mediatek@lists.infradead.org>,
<linux-phy@lists.infradead.org>,
<maarten.lankhorst@linux.intel.com>, <matthias.bgg@gmail.com>,
<mripard@kernel.org>, <msp@baylibre.com>,
<p.zabel@pengutronix.de>, <robh+dt@kernel.org>,
<tzimmermann@suse.de>, <vkoul@kernel.org>
Subject: Re: [PATCH v10 14/21] drm/mediatek: dpi: Add dpintf support
Date: Mon, 13 Jun 2022 14:05:45 +0800 [thread overview]
Message-ID: <85102b2a8abeac8719ffdb2a1ec1c6463e91ddd7.camel@mediatek.com> (raw)
In-Reply-To: <60d33448-1cc9-c662-167b-10c1f9660545@wanadoo.fr>
On Thu, 2022-06-02 at 07:48 +0200, Christophe JAILLET wrote:
> Le 23/05/2022 à 12:47, Guillaume Ranquet a écrit :
> > dpintf is the displayport interface hardware unit. This unit is
> > similar
> > to dpi and can reuse most of the code.
> >
> > This patch adds support for mt8195-dpintf to this dpi driver. Main
> > differences are:
> > - Some features/functional components are not available for
> > dpintf
> > which are now excluded from code execution once is_dpintf is
> > set
> > - dpintf can and needs to choose between different clockdividers
> > based
> > on the clockspeed. This is done by choosing a different clock
> > parent.
> > - There are two additional clocks that need to be managed. These
> > are
> > only set for dpintf and will be set to NULL if not supplied.
> > The
> > clk_* calls handle these as normal clocks then.
> > - Some register contents differ slightly between the two
> > components. To
> > work around this I added register bits/masks with a DPINTF_
> > prefix
> > and use them where different.
> >
> > Based on a separate driver for dpintf created by
> > Jason-JH.Lin <jason-jh.lin-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
> > .
> >
> > Signed-off-by: Markus Schneider-Pargmann <
> > msp-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>
> > Signed-off-by: Guillaume Ranquet <
> > granquet-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>
> > ---
> > drivers/gpu/drm/mediatek/mtk_dpi.c | 126
> > +++++++++++++++++---
> > drivers/gpu/drm/mediatek/mtk_dpi_regs.h | 35 ++++++
> > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 8 ++
> > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
> > drivers/gpu/drm/mediatek/mtk_drm_drv.c | 5 +-
> > include/linux/soc/mediatek/mtk-mmsys.h | 4 +-
> > 6 files changed, 159 insertions(+), 20 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c
> > b/drivers/gpu/drm/mediatek/mtk_dpi.c
> > index eb969c5c5c2e..763bfb700135 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
> > @@ -71,6 +71,7 @@ struct mtk_dpi {
> > void __iomem *regs;
> > struct device *dev;
> > struct clk *engine_clk;
> > + struct clk *dpi_ck_cg;
> > struct clk *pixel_clk;
> > struct clk *tvd_clk;
> > int irq;
> > @@ -126,6 +127,7 @@ struct mtk_dpi_conf {
> > const u32 *output_fmts;
> > u32 num_output_fmts;
> > bool is_ck_de_pol;
> > + bool is_dpintf;
> > bool swap_input_support;
> > /* Mask used for HWIDTH, HPORCH, VSYNC_WIDTH and VSYNC_PORCH
> > (no shift) */
> > u32 dimension_mask;
> > @@ -438,6 +440,8 @@ static void mtk_dpi_power_off(struct mtk_dpi
> > *dpi)
> > mtk_dpi_disable(dpi);
> > clk_disable_unprepare(dpi->pixel_clk);
> > clk_disable_unprepare(dpi->engine_clk);
> > + clk_disable_unprepare(dpi->dpi_ck_cg);
> > + clk_disable_unprepare(dpi->tvd_clk);
> > }
> >
> > static int mtk_dpi_power_on(struct mtk_dpi *dpi)
> > @@ -447,12 +451,24 @@ static int mtk_dpi_power_on(struct mtk_dpi
> > *dpi)
> > if (++dpi->refcount != 1)
> > return 0;
> >
>
> Hi,
>
> belwo the error handling path looks odd. (both where we goto, and
> the
> order of the clk_disable_unprepare() in the error handling path.
>
> just my 2c,
>
> CJ
>
Hello Christophe,
Thanks for your review.
I will fix this order in enxt version.
Thanks
BRs,
Bo-Chen
> > + ret = clk_prepare_enable(dpi->tvd_clk);
> > + if (ret) {
> > + dev_err(dpi->dev, "Failed to enable tvd pll: %d\n",
> > ret);
> > + goto err_pixel;
> > + }
> > +
> > ret = clk_prepare_enable(dpi->engine_clk);
> > if (ret) {
> > dev_err(dpi->dev, "Failed to enable engine clock:
> > %d\n", ret);
> > goto err_refcount;
> > }
> >
> > + ret = clk_prepare_enable(dpi->dpi_ck_cg);
> > + if (ret) {
> > + dev_err(dpi->dev, "Failed to enable dpi_ck_cg clock:
> > %d\n", ret);
> > + goto err_ck_cg;
> > + }
> > +
> > ret = clk_prepare_enable(dpi->pixel_clk);
> > if (ret) {
> > dev_err(dpi->dev, "Failed to enable pixel clock: %d\n",
> > ret);
> > @@ -466,6 +482,8 @@ static int mtk_dpi_power_on(struct mtk_dpi
> > *dpi)
> > return 0;
> >
> > err_pixel:
> > + clk_disable_unprepare(dpi->dpi_ck_cg);
> > +err_ck_cg:
> > clk_disable_unprepare(dpi->engine_clk);
> > err_refcount:
> > dpi->refcount--;
>
> [...]
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-06-13 6:06 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-23 10:47 [PATCH v10 00/21] drm/mediatek: Add mt8195 DisplayPort driver Guillaume Ranquet
2022-05-23 10:47 ` [PATCH v10 01/21] dt-bindings: mediatek,dpi: Add DPINTF compatible Guillaume Ranquet
2022-05-23 12:33 ` Rob Herring
2022-05-24 3:29 ` Chunfeng Yun
2022-05-25 11:55 ` AngeloGioacchino Del Regno
2022-06-07 2:31 ` Rex-BC Chen
2022-05-25 12:49 ` Maxime Ripard
2022-06-07 2:35 ` Rex-BC Chen
2022-05-23 10:47 ` [PATCH v10 02/21] dt-bindings: mediatek,dp: Add Display Port binding Guillaume Ranquet
2022-05-24 3:35 ` Chunfeng Yun
2022-06-10 2:27 ` Rex-BC Chen
2022-05-25 15:30 ` AngeloGioacchino Del Regno
2022-06-10 2:29 ` Rex-BC Chen
2022-06-02 13:20 ` Rob Herring
2022-05-23 10:47 ` [PATCH v10 03/21] drm/edid: Convert cea_sad helper struct to kernelDoc Guillaume Ranquet
2022-05-23 10:57 ` Matthias Brugger
2022-06-07 2:44 ` Rex-BC Chen
2022-05-25 12:01 ` AngeloGioacchino Del Regno
2022-06-07 2:45 ` Rex-BC Chen
2022-05-23 10:47 ` [PATCH v10 04/21] drm/edid: Add cea_sad helpers for freq/length Guillaume Ranquet
2022-05-25 12:26 ` AngeloGioacchino Del Regno
2022-06-10 6:50 ` Rex-BC Chen
2022-05-23 10:47 ` [PATCH v10 05/21] video/hdmi: Add audio_infoframe packing for DP Guillaume Ranquet
2022-05-25 12:32 ` AngeloGioacchino Del Regno
2022-06-07 3:10 ` Rex-BC Chen
2022-05-23 10:47 ` [PATCH v10 06/21] drm/mediatek: dpi: move dpi limits to SoC config Guillaume Ranquet
2022-05-23 10:47 ` [PATCH v10 07/21] drm/mediatek: dpi: implement a CK/DE pol toggle in " Guillaume Ranquet
2022-05-30 7:44 ` CK Hu
2022-06-07 2:54 ` Rex-BC Chen
2022-05-23 10:47 ` [PATCH v10 08/21] drm/mediatek: dpi: implement a swap_input " Guillaume Ranquet
2022-05-30 7:50 ` CK Hu
2022-06-13 3:12 ` Rex-BC Chen
2022-05-23 10:47 ` [PATCH v10 09/21] drm/mediatek: dpi: move dimension mask to " Guillaume Ranquet
2022-05-30 7:55 ` CK Hu
2022-05-23 10:47 ` [PATCH v10 10/21] drm/mediatek: dpi: move hvsize_mask " Guillaume Ranquet
2022-05-30 8:21 ` CK Hu
2022-05-23 10:47 ` [PATCH v10 11/21] drm/mediatek: dpi: move swap_shift " Guillaume Ranquet
2022-05-30 8:38 ` CK Hu
2022-06-02 11:38 ` Rex-BC Chen
2022-06-02 12:19 ` Rex-BC Chen
2022-05-23 10:47 ` [PATCH v10 12/21] drm/mediatek: dpi: move the yuv422_en_bit " Guillaume Ranquet
2022-05-30 8:47 ` CK Hu
2022-05-23 10:47 ` [PATCH v10 13/21] drm/mediatek: dpi: move the csc_enable bit " Guillaume Ranquet
2022-05-23 10:47 ` [PATCH v10 14/21] drm/mediatek: dpi: Add dpintf support Guillaume Ranquet
2022-05-25 12:58 ` AngeloGioacchino Del Regno
2022-06-13 6:10 ` Rex-BC Chen
2022-06-02 5:48 ` Christophe JAILLET
2022-06-13 6:05 ` Rex-BC Chen [this message]
2022-05-23 10:47 ` [PATCH v10 15/21] drm/mediatek: dpi: Only enable dpi after the bridge is enabled Guillaume Ranquet
2022-05-23 10:47 ` [PATCH v10 16/21] drm/meditek: dpi: Add matrix_sel helper Guillaume Ranquet
2022-05-23 10:47 ` [PATCH v10 17/21] phy: phy-mtk-dp: Add driver for DP phy Guillaume Ranquet
2022-06-08 16:31 ` Vinod Koul
2022-05-23 10:47 ` [PATCH v10 18/21] drm/mediatek: Add mt8195 Embedded DisplayPort driver Guillaume Ranquet
2022-05-25 5:47 ` CK Hu
2022-05-30 9:34 ` CK Hu
2022-05-30 10:08 ` CK Hu
2022-06-07 6:21 ` CK Hu
2022-06-07 12:24 ` Rex-BC Chen
2022-06-08 2:23 ` CK Hu
2022-06-08 8:43 ` Rex-BC Chen
2022-06-08 9:15 ` CK Hu
2022-06-08 11:52 ` Rex-BC Chen
2022-06-07 6:44 ` CK Hu
2022-06-07 12:44 ` Rex-BC Chen
2022-06-08 2:44 ` CK Hu
2022-06-08 12:54 ` Rex-BC Chen
2022-06-07 7:30 ` CK Hu
2022-06-07 12:46 ` Rex-BC Chen
2022-06-07 7:47 ` CK Hu
2022-06-08 10:26 ` Rex-BC Chen
2022-06-09 2:30 ` CK Hu
2022-06-09 7:24 ` Rex-BC Chen
2022-06-07 8:01 ` CK Hu
2022-06-09 7:18 ` Rex-BC Chen
2022-06-07 8:12 ` CK Hu
2022-06-07 12:55 ` Rex-BC Chen
2022-06-07 9:04 ` CK Hu
2022-06-09 8:00 ` Rex-BC Chen
2022-06-08 8:30 ` CK Hu
2022-06-09 8:03 ` Rex-BC Chen
2022-06-08 8:45 ` CK Hu
2022-06-08 8:54 ` Rex-BC Chen
2022-06-09 9:37 ` CK Hu
2022-06-10 2:10 ` Rex-BC Chen
2022-05-23 10:47 ` [PATCH v10 19/21] drm/mediatek: Add mt8195 External DisplayPort support Guillaume Ranquet
2022-05-25 13:04 ` AngeloGioacchino Del Regno
2022-05-23 10:47 ` [PATCH v10 20/21] drm/mediatek: add hpd debounce Guillaume Ranquet
2022-05-23 10:47 ` [PATCH v10 21/21] drm/mediatek: DP audio support for mt8195 Guillaume Ranquet
2022-06-02 3:50 ` [PATCH v10 00/21] drm/mediatek: Add mt8195 DisplayPort driver Rex-BC Chen
2022-06-02 5:31 ` Rex-BC Chen
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