| 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
| ||
|
Message-ID: <47bf6151-4a71-1ee1-62e6-acdf82563ff4@quicinc.com>
Date: Tue, 26 Apr 2022 15:21:15 -0700
From: Abhinav Kumar <quic_abhinavk@...cinc.com>
To: Douglas Anderson <dianders@...omium.org>,
<dri-devel@...ts.freedesktop.org>
CC: <dmitry.baryshkov@...aro.org>, <swboyd@...omium.org>,
<quic_aravindh@...cinc.com>, <robdclark@...il.com>,
<quic_khsieh@...cinc.com>, <linux-arm-msm@...r.kernel.org>,
<quic_sbillaka@...cinc.com>, Daniel Vetter <daniel@...ll.ch>,
David Airlie <airlied@...ux.ie>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] drm/probe-helper: Add helper for
drm_helper_probe_single_connector_modes()
On 4/26/2022 11:46 AM, Douglas Anderson wrote:
> The drm_helper_probe_single_connector_modes() is a bit long. Let's
> break a chunk off to update and validate modes. This helps avoid one
> goto and also will allow us to more easily call the helper a second
> time in a future patch without adding looping or another goto.
>
> This change is intended to be a no-op change--just code movement.
>
> Signed-off-by: Douglas Anderson <dianders@...omium.org>
I think this cleanup looks reasonable to me.
Hence,
Reviewed-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
> ---
>
> drivers/gpu/drm/drm_probe_helper.c | 105 ++++++++++++++++-------------
> 1 file changed, 59 insertions(+), 46 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c
> index 682359512996..819225629010 100644
> --- a/drivers/gpu/drm/drm_probe_helper.c
> +++ b/drivers/gpu/drm/drm_probe_helper.c
> @@ -354,6 +354,61 @@ drm_helper_probe_detect(struct drm_connector *connector,
> }
> EXPORT_SYMBOL(drm_helper_probe_detect);
>
> +static bool _drm_helper_update_and_validate(struct drm_connector *connector,
> + uint32_t maxX, uint32_t maxY,
> + struct drm_modeset_acquire_ctx *ctx)
> +{
> + struct drm_device *dev = connector->dev;
> + struct drm_display_mode *mode;
> + int mode_flags = 0;
> + int ret;
> +
> + drm_connector_list_update(connector);
> +
> + if (connector->interlace_allowed)
> + mode_flags |= DRM_MODE_FLAG_INTERLACE;
> + if (connector->doublescan_allowed)
> + mode_flags |= DRM_MODE_FLAG_DBLSCAN;
> + if (connector->stereo_allowed)
> + mode_flags |= DRM_MODE_FLAG_3D_MASK;
> +
> + list_for_each_entry(mode, &connector->modes, head) {
> + if (mode->status != MODE_OK)
> + continue;
> +
> + mode->status = drm_mode_validate_driver(dev, mode);
> + if (mode->status != MODE_OK)
> + continue;
> +
> + mode->status = drm_mode_validate_size(mode, maxX, maxY);
> + if (mode->status != MODE_OK)
> + continue;
> +
> + mode->status = drm_mode_validate_flag(mode, mode_flags);
> + if (mode->status != MODE_OK)
> + continue;
> +
> + ret = drm_mode_validate_pipeline(mode, connector, ctx,
> + &mode->status);
> + if (ret) {
> + drm_dbg_kms(dev,
> + "drm_mode_validate_pipeline failed: %d\n",
> + ret);
> +
> + if (drm_WARN_ON_ONCE(dev, ret != -EDEADLK))
> + mode->status = MODE_ERROR;
> + else
> + return true;
> + }
> +
> + if (mode->status != MODE_OK)
> + continue;
> + mode->status = drm_mode_validate_ycbcr420(mode, connector);
> + }
> +
> + return false;
> +}
> +
> /**
> * drm_helper_probe_single_connector_modes - get complete set of display modes
> * @connector: connector to probe
> @@ -421,7 +476,6 @@ int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
> const struct drm_connector_helper_funcs *connector_funcs =
> connector->helper_private;
> int count = 0, ret;
> - int mode_flags = 0;
> bool verbose_prune = true;
> enum drm_connector_status old_status;
> struct drm_modeset_acquire_ctx ctx;
> @@ -519,52 +573,11 @@ int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
> connector->status == connector_status_unknown))
> count = drm_add_modes_noedid(connector, 1024, 768);
> count += drm_helper_probe_add_cmdline_mode(connector);
> - if (count == 0)
> - goto prune;
> -
> - drm_connector_list_update(connector);
> -
> - if (connector->interlace_allowed)
> - mode_flags |= DRM_MODE_FLAG_INTERLACE;
> - if (connector->doublescan_allowed)
> - mode_flags |= DRM_MODE_FLAG_DBLSCAN;
> - if (connector->stereo_allowed)
> - mode_flags |= DRM_MODE_FLAG_3D_MASK;
> -
> - list_for_each_entry(mode, &connector->modes, head) {
> - if (mode->status != MODE_OK)
> - continue;
> -
> - mode->status = drm_mode_validate_driver(dev, mode);
> - if (mode->status != MODE_OK)
> - continue;
> -
> - mode->status = drm_mode_validate_size(mode, maxX, maxY);
> - if (mode->status != MODE_OK)
> - continue;
> -
> - mode->status = drm_mode_validate_flag(mode, mode_flags);
> - if (mode->status != MODE_OK)
> - continue;
> -
> - ret = drm_mode_validate_pipeline(mode, connector, &ctx,
> - &mode->status);
> - if (ret) {
> - drm_dbg_kms(dev,
> - "drm_mode_validate_pipeline failed: %d\n",
> - ret);
> -
> - if (drm_WARN_ON_ONCE(dev, ret != -EDEADLK)) {
> - mode->status = MODE_ERROR;
> - } else {
> - drm_modeset_backoff(&ctx);
> - goto retry;
> - }
> + if (count != 0) {
> + if (_drm_helper_update_and_validate(connector, maxX, maxY, &ctx)) {
> + drm_modeset_backoff(&ctx);
> + goto retry;
> }
> -
> - if (mode->status != MODE_OK)
> - continue;
> - mode->status = drm_mode_validate_ycbcr420(mode, connector);
> }
>
> prune:
Powered by blists - more mailing lists