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From: Sam Ravnborg <sam@ravnborg.org>
To: dri-devel@lists.freedesktop.org
Cc: Chun-Kuang Hu <chunkuang.hu@kernel.org>,
	Dafna Hirschfeld <dafna.hirschfeld@collabora.com>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	Jonas Karlman <jonas@kwiboo.se>, David Airlie <airlied@linux.ie>,
	Robert Foss <robert.foss@linaro.org>,
	Neil Armstrong <narmstrong@baylibre.com>,
	Jernej Skrabec <jernej.skrabec@gmail.com>,
	Andrzej Hajda <a.hajda@samsung.com>,
	Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Sam Ravnborg <sam@ravnborg.org>,
Subject: [PATCH v1 5/7] drm/mediatek: Drop chain_mode_fixup call in mode_valid()
Date: Thu, 22 Jul 2021 08:22:44 +0200	[thread overview]
Message-ID: <20210722062246.2512666-6-sam@ravnborg.org> (raw)
In-Reply-To: <20210722062246.2512666-1-sam@ravnborg.org>

The mode_valid implementation had a call to
drm_bridge_chain_mode_fixup() which would be wrong as the mode_valid is
not allowed to change anything - only to validate the mode.

As the next bridge is often/always a connector the call had no effect
anyway. So drop it.

From the git history I could see this call was included in the original
version of the driver so there was no help there to find out why it was
added in the first place. But a lot has changed since the initial driver
were added and is seems safe to remove the call now.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Cc: linux-mediatek@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org
 drivers/gpu/drm/mediatek/mtk_hdmi.c | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
index dea46d66e712..c45e4dbd9a2f 100644
--- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
@@ -1206,22 +1206,11 @@ static int mtk_hdmi_bridge_mode_valid(struct drm_bridge *bridge,
 				      const struct drm_display_mode *mode)
 	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
-	struct drm_bridge *next_bridge;
 	dev_dbg(hdmi->dev, "xres=%d, yres=%d, refresh=%d, intl=%d clock=%d\n",
 		mode->hdisplay, mode->vdisplay, drm_mode_vrefresh(mode),
 		!!(mode->flags & DRM_MODE_FLAG_INTERLACE), mode->clock * 1000);
-	next_bridge = drm_bridge_get_next_bridge(&hdmi->bridge);
-	if (next_bridge) {
-		struct drm_display_mode adjusted_mode;
-		drm_mode_copy(&adjusted_mode, mode);
-		if (!drm_bridge_chain_mode_fixup(next_bridge, mode,
-						 &adjusted_mode))
-			return MODE_BAD;
-	}
 	if (mode->clock < 27000)
 		return MODE_CLOCK_LOW;
 	if (mode->clock > 297000)

  parent reply	other threads:[~2021-07-22  6:23 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-22  6:22 [PATCH v1 0/7] drm/bridge: Drop deprecated functions Sam Ravnborg
2021-07-22  6:22 ` [PATCH v1 1/7] drm/bridge: ps8640: Use atomic variants of drm_bridge_funcs Sam Ravnborg
2021-07-22  7:18   ` Maxime Ripard
2021-07-22  6:22 ` [PATCH v1 2/7] drm/bridge: Drop unused drm_bridge_chain functions Sam Ravnborg
2021-07-22  7:19   ` Maxime Ripard
2021-07-22  6:22 ` [PATCH v1 3/7] drm/bridge: Add drm_bridge_new_crtc_state() helper Sam Ravnborg
2021-07-22  7:30   ` Maxime Ripard
2021-07-22  6:22 ` [PATCH v1 4/7] drm/bridge: lontium-lt9611: Use atomic variants of drm_bridge_funcs Sam Ravnborg
2021-07-22  7:42   ` Maxime Ripard
2021-07-22  6:22 ` Sam Ravnborg [this message]
2021-07-22  7:31   ` [PATCH v1 5/7] drm/mediatek: Drop chain_mode_fixup call in mode_valid() Maxime Ripard
2021-07-22  6:22 ` [PATCH v1 6/7] drm/bridge: Drop drm_bridge_chain_mode_fixup Sam Ravnborg
2021-07-22  7:32   ` Maxime Ripard
2021-07-22  6:22 ` [PATCH v1 7/7] drm/todo: Add bridge related todo items Sam Ravnborg
2021-07-22  7:34   ` Maxime Ripard

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