linux-kernel - Re: [PATCH v4 69/78] drm/vc4: hdmi: Remove register dumps in enable

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAPY8ntBD_qkvP5DyOx8O-9kFzqKxE-q9swrhBcmRm2L4dDA7gw@mail.gmail.com>
Date:   Tue, 28 Jul 2020 16:01:22 +0100
From:   Dave Stevenson <dave.stevenson@...pberrypi.com>
To:     Maxime Ripard <maxime@...no.tech>
Cc:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        Eric Anholt <eric@...olt.net>,
        DRI Development <dri-devel@...ts.freedesktop.org>,
        linux-rpi-kernel@...ts.infradead.org,
        bcm-kernel-feedback-list@...adcom.com,
        linux-arm-kernel@...ts.infradead.org,
        LKML <linux-kernel@...r.kernel.org>,
        Tim Gover <tim.gover@...pberrypi.com>,
        Phil Elwell <phil@...pberrypi.com>
Subject: Re: [PATCH v4 69/78] drm/vc4: hdmi: Remove register dumps in enable

Hi Maxime

On Wed, 8 Jul 2020 at 18:44, Maxime Ripard <maxime@...no.tech> wrote:
>
> The current code has some logic, disabled by default, to dump the register
> setup in the HDMI controller.
>
> However, since we're going to split those functions in multiple, shorter,
> functions that only make sense where they are called in sequence, keeping
> the register dump makes little sense.
>
> Signed-off-by: Maxime Ripard <maxime@...no.tech>

Reviewed-by: Dave Stevenson <dave.stevenson@...pberrypi.com>

> ---
>  drivers/gpu/drm/vc4/vc4_hdmi.c | 17 -----------------
>  1 file changed, 17 deletions(-)
>
> diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
> index 0a9a323e03d8..4058985940e6 100644
> --- a/drivers/gpu/drm/vc4/vc4_hdmi.c
> +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
> @@ -430,7 +430,6 @@ static void vc4_hdmi_encoder_enable(struct drm_encoder *encoder)
>         struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
>         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
>         struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
> -       bool debug_dump_regs = false;
>         unsigned long pixel_rate, hsm_rate;
>         int ret;
>
> @@ -489,14 +488,6 @@ static void vc4_hdmi_encoder_enable(struct drm_encoder *encoder)
>         if (vc4_hdmi->variant->phy_init)
>                 vc4_hdmi->variant->phy_init(vc4_hdmi, mode);
>
> -       if (debug_dump_regs) {
> -               struct drm_printer p = drm_info_printer(&vc4_hdmi->pdev->dev);
> -
> -               dev_info(&vc4_hdmi->pdev->dev, "HDMI regs before:\n");
> -               drm_print_regset32(&p, &vc4_hdmi->hdmi_regset);
> -               drm_print_regset32(&p, &vc4_hdmi->hd_regset);
> -       }
> -
>         HDMI_WRITE(HDMI_VID_CTL, 0);
>
>         HDMI_WRITE(HDMI_SCHEDULER_CONTROL,
> @@ -522,14 +513,6 @@ static void vc4_hdmi_encoder_enable(struct drm_encoder *encoder)
>
>         HDMI_WRITE(HDMI_FIFO_CTL, VC4_HDMI_FIFO_CTL_MASTER_SLAVE_N);
>
> -       if (debug_dump_regs) {
> -               struct drm_printer p = drm_info_printer(&vc4_hdmi->pdev->dev);
> -
> -               dev_info(&vc4_hdmi->pdev->dev, "HDMI regs after:\n");
> -               drm_print_regset32(&p, &vc4_hdmi->hdmi_regset);
> -               drm_print_regset32(&p, &vc4_hdmi->hd_regset);
> -       }
> -
>         HDMI_WRITE(HDMI_VID_CTL,
>                    HDMI_READ(HDMI_VID_CTL) |
>                    VC4_HD_VID_CTL_ENABLE |
> --
> git-series 0.9.1