drm/panel: decouple connector from drm_panel

To facilitate moving connector creation to display drivers,
decouple the drm_connector from drm_panel.

This patch adds a connector argument to drm_panel_get_modes().

All users of drm_panel_get_modes() already had the connector
available, so updating users was trivial.

With this patch drm_panel no longer keeps a reference to the drm_connector.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Jeffrey Hugo <jeffrey.l.hugo@gmail.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Andrzej Hajda <a.hajda@samsung.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@siol.net>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Inki Dae <inki.dae@samsung.com>
Cc: Joonyoung Shim <jy0922.shim@samsung.com>
Cc: Seung-Woo Kim <sw0312.kim@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Stefan Agner <stefan@agner.ch>
Cc: Alison Wang <alison.wang@nxp.com>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: CK Hu <ck.hu@mediatek.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Cc: Sandy Huang <hjc@rock-chips.com>
Cc: "Heiko Stübner" <heiko@sntech.de>
Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Cc: Vincent Abriou <vincent.abriou@st.com>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: Torsten Duwe <duwe@lst.de>
Cc: Vasily Khoruzhick <anarsoul@gmail.com>
Cc: Icenowy Zheng <icenowy@aosc.io>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Boris Brezillon <boris.brezillon@collabora.com>
Cc: Hariprasad Kelam <hariprasad.kelam@gmail.com>
Cc: Alexios Zavras <alexios.zavras@intel.com>
Cc: Brian Masney <masneyb@onstation.org>
Cc: Rob Clark <robdclark@chromium.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Allison Randal <allison@lohutok.net>
Cc: Shayenne Moura <shayenneluzmoura@gmail.com>
Cc: Abhinav Kumar <abhinavk@codeaurora.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: linux-mediatek@lists.infradead.org
Cc: linux-renesas-soc@vger.kernel.org
Cc: linux-rockchip@lists.infradead.org
Cc: linux-tegra@vger.kernel.org
Link: https://patchwork.freedesktop.org/patch/msgid/20191207140353.23967-7-sam@ravnborg.org

drivers/gpu/drm/bridge/analogix/analogix-anx6345.c

@@ -493,7 +493,7 @@ static int anx6345_get_modes(struct drm_connector *connector)
 	mutex_unlock(&anx6345->lock);
 
 	if (!num_modes && anx6345->panel)
-		num_modes += drm_panel_get_modes(anx6345->panel);
+		num_modes += drm_panel_get_modes(anx6345->panel, connector);
 
 	return num_modes;
 }

drivers/gpu/drm/bridge/analogix/analogix_dp_core.c

@@ -1111,7 +1111,7 @@ static int analogix_dp_get_modes(struct drm_connector *connector)
 	int ret, num_modes = 0;
 
 	if (dp->plat_data->panel) {
-		num_modes += drm_panel_get_modes(dp->plat_data->panel);
+		num_modes += drm_panel_get_modes(dp->plat_data->panel, connector);
 	} else {
 		ret = analogix_dp_prepare_panel(dp, true, false);
 		if (ret) {

drivers/gpu/drm/bridge/panel.c

@@ -37,7 +37,7 @@ static int panel_bridge_connector_get_modes(struct drm_connector *connector)
 	struct panel_bridge *panel_bridge =
 		drm_connector_to_panel_bridge(connector);
 
-	return drm_panel_get_modes(panel_bridge->panel);
+	return drm_panel_get_modes(panel_bridge->panel, connector);
 }
 
 static const struct drm_connector_helper_funcs

drivers/gpu/drm/bridge/parade-ps8622.c

@@ -461,7 +461,7 @@ static int ps8622_get_modes(struct drm_connector *connector)
 
 	ps8622 = connector_to_ps8622(connector);
 
-	return drm_panel_get_modes(ps8622->panel);
+	return drm_panel_get_modes(ps8622->panel, connector);
 }
 
 static const struct drm_connector_helper_funcs ps8622_connector_helper_funcs = {

drivers/gpu/drm/bridge/tc358764.c

@@ -282,7 +282,7 @@ static int tc358764_get_modes(struct drm_connector *connector)
 {
 	struct tc358764 *ctx = connector_to_tc358764(connector);
 
-	return drm_panel_get_modes(ctx->panel);
+	return drm_panel_get_modes(ctx->panel, connector);
 }
 
 static const

drivers/gpu/drm/bridge/tc358767.c

@@ -1346,7 +1346,7 @@ static int tc_connector_get_modes(struct drm_connector *connector)
 		return 0;
 	}
 
-	count = drm_panel_get_modes(tc->panel);
+	count = drm_panel_get_modes(tc->panel, connector);
 	if (count > 0)
 		return count;
 

drivers/gpu/drm/bridge/ti-sn65dsi86.c

@@ -206,7 +206,7 @@ static int ti_sn_bridge_connector_get_modes(struct drm_connector *connector)
 {
 	struct ti_sn_bridge *pdata = connector_to_ti_sn_bridge(connector);
 
-	return drm_panel_get_modes(pdata->panel);
+	return drm_panel_get_modes(pdata->panel, connector);
 }
 
 static enum drm_mode_status

drivers/gpu/drm/drm_panel.c

@@ -114,10 +114,9 @@ EXPORT_SYMBOL(drm_panel_remove);
  */
 int drm_panel_attach(struct drm_panel *panel, struct drm_connector *connector)
 {
-	if (panel->connector)
+	if (panel->drm)
 		return -EBUSY;
 
-	panel->connector = connector;
 	panel->drm = connector->dev;
 
 	return 0;
@@ -136,7 +135,6 @@ EXPORT_SYMBOL(drm_panel_attach);
  */
 void drm_panel_detach(struct drm_panel *panel)
 {
-	panel->connector = NULL;
 	panel->drm = NULL;
 }
 EXPORT_SYMBOL(drm_panel_detach);
@@ -250,6 +248,7 @@ EXPORT_SYMBOL(drm_panel_disable);
 /**
  * drm_panel_get_modes - probe the available display modes of a panel
  * @panel: DRM panel
+ * @connector: DRM connector
  *
  * The modes probed from the panel are automatically added to the connector
  * that the panel is attached to.
@@ -257,13 +256,14 @@ EXPORT_SYMBOL(drm_panel_disable);
  * Return: The number of modes available from the panel on success or a
  * negative error code on failure.
  */
-int drm_panel_get_modes(struct drm_panel *panel)
+int drm_panel_get_modes(struct drm_panel *panel,
+			struct drm_connector *connector)
 {
 	if (!panel)
 		return -EINVAL;
 
 	if (panel->funcs && panel->funcs->get_modes)
-		return panel->funcs->get_modes(panel, panel->connector);
+		return panel->funcs->get_modes(panel, connector);
 
 	return -EOPNOTSUPP;
 }

drivers/gpu/drm/exynos/exynos_drm_dpi.c

@@ -85,7 +85,7 @@ static int exynos_dpi_get_modes(struct drm_connector *connector)
 	}
 
 	if (ctx->panel)
-		return drm_panel_get_modes(ctx->panel);
+		return drm_panel_get_modes(ctx->panel, connector);
 
 	return 0;
 }

drivers/gpu/drm/exynos/exynos_drm_dsi.c

@@ -1462,7 +1462,7 @@ static int exynos_dsi_get_modes(struct drm_connector *connector)
 	struct exynos_dsi *dsi = connector_to_dsi(connector);
 
 	if (dsi->panel)
-		return drm_panel_get_modes(dsi->panel);
+		return drm_panel_get_modes(dsi->panel, connector);
 
 	return 0;
 }

drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c

@@ -68,7 +68,7 @@ static int fsl_dcu_drm_connector_get_modes(struct drm_connector *connector)
 	struct fsl_dcu_drm_connector *fsl_connector;
 
 	fsl_connector = to_fsl_dcu_connector(connector);
-	return drm_panel_get_modes(fsl_connector->panel);
+	return drm_panel_get_modes(fsl_connector->panel, connector);
 }
 
 static int fsl_dcu_drm_connector_mode_valid(struct drm_connector *connector,

drivers/gpu/drm/imx/imx-ldb.c

@@ -127,7 +127,7 @@ static int imx_ldb_connector_get_modes(struct drm_connector *connector)
 	struct imx_ldb_channel *imx_ldb_ch = con_to_imx_ldb_ch(connector);
 	int num_modes;
 
-	num_modes = drm_panel_get_modes(imx_ldb_ch->panel);
+	num_modes = drm_panel_get_modes(imx_ldb_ch->panel, connector);
 	if (num_modes > 0)
 		return num_modes;
 

drivers/gpu/drm/imx/parallel-display.c

@@ -50,7 +50,7 @@ static int imx_pd_connector_get_modes(struct drm_connector *connector)
 	struct device_node *np = imxpd->dev->of_node;
 	int num_modes;
 
-	num_modes = drm_panel_get_modes(imxpd->panel);
+	num_modes = drm_panel_get_modes(imxpd->panel, connector);
 	if (num_modes > 0)
 		return num_modes;
 

drivers/gpu/drm/mediatek/mtk_dsi.c

@@ -821,7 +821,7 @@ static int mtk_dsi_connector_get_modes(struct drm_connector *connector)
 {
 	struct mtk_dsi *dsi = connector_to_dsi(connector);
 
-	return drm_panel_get_modes(dsi->panel);
+	return drm_panel_get_modes(dsi->panel, connector);
 }
 
 static const struct drm_encoder_helper_funcs mtk_dsi_encoder_helper_funcs = {

drivers/gpu/drm/msm/disp/mdp4/mdp4_lvds_connector.c

@@ -53,7 +53,7 @@ static int mdp4_lvds_connector_get_modes(struct drm_connector *connector)
 	if (panel) {
 		drm_panel_attach(panel, connector);
 
-		ret = drm_panel_get_modes(panel);
+		ret = drm_panel_get_modes(panel, connector);
 
 		drm_panel_detach(panel);
 	}

drivers/gpu/drm/msm/dsi/dsi_manager.c

@@ -329,7 +329,7 @@ static int dsi_mgr_connector_get_modes(struct drm_connector *connector)
 	 * attached to the drm_panel.
 	 */
 	drm_panel_attach(panel, connector);
-	num = drm_panel_get_modes(panel);
+	num = drm_panel_get_modes(panel, connector);
 	if (!num)
 		return 0;
 

drivers/gpu/drm/mxsfb/mxsfb_out.c

@@ -31,7 +31,7 @@ static int mxsfb_panel_get_modes(struct drm_connector *connector)
 			drm_connector_to_mxsfb_drm_private(connector);
 
 	if (mxsfb->panel)
-		return drm_panel_get_modes(mxsfb->panel);
+		return drm_panel_get_modes(mxsfb->panel, connector);
 
 	return 0;
 }

drivers/gpu/drm/omapdrm/omap_connector.c

@@ -229,7 +229,8 @@ static int omap_connector_get_modes(struct drm_connector *connector)
 	 * operation to the panel API.
 	 */
 	if (omap_connector->output->panel)
-		return drm_panel_get_modes(omap_connector->output->panel);
+		return drm_panel_get_modes(omap_connector->output->panel,
+					   connector);
 
 	/*
 	 * We can't retrieve modes, which can happen for instance for a DVI or

drivers/gpu/drm/rcar-du/rcar_lvds.c

@@ -91,7 +91,7 @@ static int rcar_lvds_connector_get_modes(struct drm_connector *connector)
 {
 	struct rcar_lvds *lvds = connector_to_rcar_lvds(connector);
 
-	return drm_panel_get_modes(lvds->panel);
+	return drm_panel_get_modes(lvds->panel, connector);
 }
 
 static int rcar_lvds_connector_atomic_check(struct drm_connector *connector,

drivers/gpu/drm/rockchip/rockchip_lvds.c

@@ -201,7 +201,7 @@ static int rockchip_lvds_connector_get_modes(struct drm_connector *connector)
 	struct rockchip_lvds *lvds = connector_to_lvds(connector);
 	struct drm_panel *panel = lvds->panel;
 
-	return drm_panel_get_modes(panel);
+	return drm_panel_get_modes(panel, connector);
 }
 
 static const

drivers/gpu/drm/sti/sti_dvo.c

@@ -339,7 +339,7 @@ static int sti_dvo_connector_get_modes(struct drm_connector *connector)
 	struct sti_dvo *dvo = dvo_connector->dvo;
 
 	if (dvo->panel)
-		return drm_panel_get_modes(dvo->panel);
+		return drm_panel_get_modes(dvo->panel, connector);
 
 	return 0;
 }

drivers/gpu/drm/sun4i/sun4i_lvds.c

@@ -43,7 +43,7 @@ static int sun4i_lvds_get_modes(struct drm_connector *connector)
 	struct sun4i_lvds *lvds =
 		drm_connector_to_sun4i_lvds(connector);
 
-	return drm_panel_get_modes(lvds->panel);
+	return drm_panel_get_modes(lvds->panel, connector);
 }
 
 static struct drm_connector_helper_funcs sun4i_lvds_con_helper_funcs = {

drivers/gpu/drm/sun4i/sun4i_rgb.c

@@ -47,7 +47,7 @@ static int sun4i_rgb_get_modes(struct drm_connector *connector)
 	struct sun4i_rgb *rgb =
 		drm_connector_to_sun4i_rgb(connector);
 
-	return drm_panel_get_modes(rgb->panel);
+	return drm_panel_get_modes(rgb->panel, connector);
 }
 
 /*

drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c

@@ -795,7 +795,7 @@ static int sun6i_dsi_get_modes(struct drm_connector *connector)
 {
 	struct sun6i_dsi *dsi = connector_to_sun6i_dsi(connector);
 
-	return drm_panel_get_modes(dsi->panel);
+	return drm_panel_get_modes(dsi->panel, connector);
 }
 
 static struct drm_connector_helper_funcs sun6i_dsi_connector_helper_funcs = {

drivers/gpu/drm/tegra/output.c

@@ -23,7 +23,7 @@ int tegra_output_connector_get_modes(struct drm_connector *connector)
 	 * ignore any other means of obtaining a mode.
 	 */
 	if (output->panel) {
-		err = drm_panel_get_modes(output->panel);
+		err = drm_panel_get_modes(output->panel, connector);
 		if (err > 0)
 			return err;
 	}

include/drm/drm_panel.h

@@ -136,13 +136,6 @@ struct drm_panel {
 	 */
 	struct drm_device *drm;
 
-	/**
-	 * @connector:
-	 *
-	 * DRM connector that the panel is attached to.
-	 */
-	struct drm_connector *connector;
-
 	/**
 	 * @dev:
 	 *
@@ -201,7 +194,7 @@ int drm_panel_unprepare(struct drm_panel *panel);
 int drm_panel_enable(struct drm_panel *panel);
 int drm_panel_disable(struct drm_panel *panel);
 
-int drm_panel_get_modes(struct drm_panel *panel);
+int drm_panel_get_modes(struct drm_panel *panel, struct drm_connector *connector);
 
 #if defined(CONFIG_OF) && defined(CONFIG_DRM_PANEL)
 struct drm_panel *of_drm_find_panel(const struct device_node *np);