drm/msm: Initial add eDP support in msm drm driver (v5)

This change adds a new eDP connector in msm drm driver. With this
change, eDP panel can work with msm platform under drm framework.

v1: Initial change

v2: Address Rob's comments
    Use generated header file for register definitions
    Change to devm_* APIs

v3: Address Thierry's comments and rebase on top of atomic changes
    Remove edp_bridge_mode_fixup
    Remove backlight control code and rely on pwm-backlight
    Remove continuous splash screen support for now
    Change to gpiod_* APIs

v4: Fix kbuild test issue

Signed-off-by: Hai Li <hali@codeaurora.org>
[robclark: v5: rebase on drm_bridge changes in drm-next]
Signed-off-by: Rob Clark <robdclark@gmail.com>

1 files changed, 85 insertions, 0 deletions

diff --git a/drivers/gpu/drm/msm/edp/edp.h b/drivers/gpu/drm/msm/edp/edp.h
new file mode 100644
index 000000000000..ba5bedde5241
--- /dev/null
+++ b/drivers/gpu/drm/msm/edp/edp.h
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __EDP_CONNECTOR_H__
+#define __EDP_CONNECTOR_H__
+
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+
+#include "drm_crtc.h"
+#include "drm_dp_helper.h"
+#include "msm_drv.h"
+
+#define edp_read(offset) msm_readl((offset))
+#define edp_write(offset, data) msm_writel((data), (offset))
+
+struct edp_ctrl;
+struct edp_aux;
+struct edp_phy;
+
+struct msm_edp {
+	struct drm_device *dev;
+	struct platform_device *pdev;
+
+	struct drm_connector *connector;
+	struct drm_bridge *bridge;
+
+	/* the encoder we are hooked to (outside of eDP block) */
+	struct drm_encoder *encoder;
+
+	struct edp_ctrl *ctrl;
+
+	int irq;
+};
+
+/* eDP bridge */
+struct drm_bridge *msm_edp_bridge_init(struct msm_edp *edp);
+void edp_bridge_destroy(struct drm_bridge *bridge);
+
+/* eDP connector */
+struct drm_connector *msm_edp_connector_init(struct msm_edp *edp);
+
+/* AUX */
+void *msm_edp_aux_init(struct device *dev, void __iomem *regbase,
+			struct drm_dp_aux **drm_aux);
+void msm_edp_aux_destroy(struct device *dev, struct edp_aux *aux);
+irqreturn_t msm_edp_aux_irq(struct edp_aux *aux, u32 isr);
+void msm_edp_aux_ctrl(struct edp_aux *aux, int enable);
+
+/* Phy */
+bool msm_edp_phy_ready(struct edp_phy *phy);
+void msm_edp_phy_ctrl(struct edp_phy *phy, int enable);
+void msm_edp_phy_vm_pe_init(struct edp_phy *phy);
+void msm_edp_phy_vm_pe_cfg(struct edp_phy *phy, u32 v0, u32 v1);
+void msm_edp_phy_lane_power_ctrl(struct edp_phy *phy, bool up, u32 max_lane);
+void *msm_edp_phy_init(struct device *dev, void __iomem *regbase);
+
+/* Ctrl */
+irqreturn_t msm_edp_ctrl_irq(struct edp_ctrl *ctrl);
+void msm_edp_ctrl_power(struct edp_ctrl *ctrl, bool on);
+int msm_edp_ctrl_init(struct msm_edp *edp);
+void msm_edp_ctrl_destroy(struct edp_ctrl *ctrl);
+bool msm_edp_ctrl_panel_connected(struct edp_ctrl *ctrl);
+int msm_edp_ctrl_get_panel_info(struct edp_ctrl *ctrl,
+	struct drm_connector *connector, struct edid **edid);
+int msm_edp_ctrl_timing_cfg(struct edp_ctrl *ctrl,
+				const struct drm_display_mode *mode,
+				const struct drm_display_info *info);
+/* @pixel_rate is in kHz */
+bool msm_edp_ctrl_pixel_clock_valid(struct edp_ctrl *ctrl,
+	u32 pixel_rate, u32 *pm, u32 *pn);
+
+#endif /* __EDP_CONNECTOR_H__ */