linux-kernel - [PATCH v4 04/10] drm/bridge: synopsis: Add mode

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Message-Id: <f9709b4483d68ebfa12077b6500970763ba32570.1632761067.git.hns@goldelico.com>
Date:   Mon, 27 Sep 2021 18:44:22 +0200
From:   "H. Nikolaus Schaller" <hns@...delico.com>
To:     Paul Cercueil <paul@...pouillou.net>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        "H. Nikolaus Schaller" <hns@...delico.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Kees Cook <keescook@...omium.org>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Andrzej Hajda <a.hajda@...sung.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Robert Foss <robert.foss@...aro.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Ezequiel Garcia <ezequiel@...labora.com>,
        Harry Wentland <harry.wentland@....com>,
        Sam Ravnborg <sam@...nborg.org>,
        Maxime Ripard <maxime@...no.tech>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Paul Boddie <paul@...die.org.uk>
Cc:     devicetree@...r.kernel.org, linux-mips@...r.kernel.org,
        linux-kernel@...r.kernel.org, letux-kernel@...nphoenux.org,
        Jonas Karlman <jonas@...boo.se>,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH v4 04/10] drm/bridge: synopsis: Add mode_fixup and bridge timings support

From: Paul Boddie <paul@...die.org.uk>

The platform-specific configuration structure is augmented with
mode_fixup and timings members so that specialisations of the
Synopsys driver can introduce mode flags and bus flags.

Signed-off-by: Paul Boddie <paul@...die.org.uk>
Signed-off-by: Ezequiel Garcia <ezequiel@...labora.com>
Signed-off-by: H. Nikolaus Schaller <hns@...delico.com>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 7 +++++++
 include/drm/bridge/dw_hdmi.h              | 5 +++++
 2 files changed, 12 insertions(+)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index f08d0fded61f..f082e14320e1 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2767,6 +2767,11 @@ static int dw_hdmi_bridge_atomic_check(struct drm_bridge *bridge,
 		bridge_state->input_bus_cfg.format,
 		bridge_state->output_bus_cfg.format);
 
+	if (hdmi->plat_data->mode_fixup)
+		if (!hdmi->plat_data->mode_fixup(bridge, &crtc_state->mode,
+						 &crtc_state->adjusted_mode))
+			return -EINVAL;
+
 	return 0;
 }
 
@@ -3416,6 +3421,8 @@ struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev,
 #ifdef CONFIG_OF
 	hdmi->bridge.of_node = pdev->dev.of_node;
 #endif
+	if (plat_data->timings)
+		hdmi->bridge.timings = plat_data->timings;
 
 	memset(&pdevinfo, 0, sizeof(pdevinfo));
 	pdevinfo.parent = dev;
diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
index 2a1f85f9a8a3..743038200044 100644
--- a/include/drm/bridge/dw_hdmi.h
+++ b/include/drm/bridge/dw_hdmi.h
@@ -8,6 +8,7 @@
 
 #include <sound/hdmi-codec.h>
 
+struct drm_bridge;
 struct drm_display_info;
 struct drm_display_mode;
 struct drm_encoder;
@@ -142,6 +143,10 @@ struct dw_hdmi_plat_data {
 	enum drm_mode_status (*mode_valid)(struct dw_hdmi *hdmi, void *data,
 					   const struct drm_display_info *info,
 					   const struct drm_display_mode *mode);
+	bool (*mode_fixup)(struct drm_bridge *bridge,
+			   const struct drm_display_mode *mode,
+			   struct drm_display_mode *adjusted_mode);
+	const struct drm_bridge_timings *timings;
 
 	/* Vendor PHY support */
 	const struct dw_hdmi_phy_ops *phy_ops;
-- 
2.31.1