drm/meson: Add support for HDMI encoder and DW-HDMI bridge + PHY

The Amlogic Meson GXBB/GXL/GXM SoCs embeds a Synopsys DesignWare HDMI TX
Controller with a custom Bridge + PHY around the Controller.

This driver makes uses of all the custom PHY plat data callbacks and enables
the compatible HDMI modes to be configured as a drm_encoder instance.
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>

drivers/gpu/drm/meson/Kconfig

@@ -7,3 +7,9 @@ config DRM_MESON
 	select DRM_GEM_CMA_HELPER
 	select VIDEOMODE_HELPERS
 	select REGMAP_MMIO
+
+config DRM_MESON_DW_HDMI
+	tristate "HDMI Synopsys Controller support for Amlogic Meson Display"
+	depends on DRM_MESON
+	default y if DRM_MESON
+	select DRM_DW_HDMI

drivers/gpu/drm/meson/Makefile

@@ -2,3 +2,4 @@ meson-drm-y := meson_drv.o meson_plane.o meson_crtc.o meson_venc_cvbs.o
 meson-drm-y += meson_viu.o meson_vpp.o meson_venc.o meson_vclk.o meson_canvas.o
 
 obj-$(CONFIG_DRM_MESON) += meson-drm.o
+obj-$(CONFIG_DRM_MESON_DW_HDMI) += meson_dw_hdmi.o

drivers/gpu/drm/meson/meson_drv.h

@@ -47,6 +47,9 @@ struct meson_drm {
 
 	struct {
 		unsigned int current_mode;
+		bool hdmi_repeat;
+		bool venc_repeat;
+		bool hdmi_use_enci;
 	} venc;
 };
 

drivers/gpu/drm/meson/meson_dw_hdmi.h

+/*
+ * Copyright (C) 2016 BayLibre, SAS
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ * Copyright (C) 2015 Amlogic, Inc. 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 as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __MESON_DW_HDMI_H
+#define __MESON_DW_HDMI_H
+
+/*
+ * Bit 7 RW Reserved. Default 1.
+ * Bit 6 RW Reserved. Default 1.
+ * Bit 5 RW Reserved. Default 1.
+ * Bit 4 RW sw_reset_phyif: PHY interface. 1=Apply reset; 0=Release from reset.
+ *     Default 1.
+ * Bit 3 RW sw_reset_intr: interrupt module. 1=Apply reset;
+ *     0=Release from reset.
+ *     Default 1.
+ * Bit 2 RW sw_reset_mem: KSV/REVOC mem. 1=Apply reset; 0=Release from reset.
+ *     Default 1.
+ * Bit 1 RW sw_reset_rnd: random number interface to HDCP. 1=Apply reset;
+ *     0=Release from reset. Default 1.
+ * Bit 0 RW sw_reset_core: connects to IP's ~irstz. 1=Apply reset;
+ *     0=Release from reset. Default 1.
+ */
+#define HDMITX_TOP_SW_RESET                     (0x000)
+
+/*
+ * Bit 12 RW i2s_ws_inv:1=Invert i2s_ws; 0=No invert. Default 0.
+ * Bit 11 RW i2s_clk_inv: 1=Invert i2s_clk; 0=No invert. Default 0.
+ * Bit 10 RW spdif_clk_inv: 1=Invert spdif_clk; 0=No invert. Default 0.
+ * Bit 9 RW tmds_clk_inv: 1=Invert tmds_clk; 0=No invert. Default 0.
+ * Bit 8 RW pixel_clk_inv: 1=Invert pixel_clk; 0=No invert. Default 0.
+ * Bit 4 RW cec_clk_en: 1=enable cec_clk; 0=disable. Default 0.
+ * Bit 3 RW i2s_clk_en: 1=enable i2s_clk; 0=disable. Default 0.
+ * Bit 2 RW spdif_clk_en: 1=enable spdif_clk; 0=disable. Default 0.
+ * Bit 1 RW tmds_clk_en: 1=enable tmds_clk;  0=disable. Default 0.
+ * Bit 0 RW pixel_clk_en: 1=enable pixel_clk; 0=disable. Default 0.
+ */
+#define HDMITX_TOP_CLK_CNTL                     (0x001)
+
+/*
+ * Bit 11: 0 RW hpd_valid_width: filter out width <= M*1024.    Default 0.
+ * Bit 15:12 RW hpd_glitch_width: filter out glitch <= N.       Default 0.
+ */
+#define HDMITX_TOP_HPD_FILTER                   (0x002)
+
+/*
+ * intr_maskn: MASK_N, one bit per interrupt source.
+ *     1=Enable interrupt source; 0=Disable interrupt source. Default 0.
+ * [  4] hdcp22_rndnum_err
+ * [  3] nonce_rfrsh_rise
+ * [  2] hpd_fall_intr
+ * [  1] hpd_rise_intr
+ * [  0] core_intr
+ */
+#define HDMITX_TOP_INTR_MASKN                   (0x003)
+
+/*
+ * Bit 30: 0 RW intr_stat: For each bit, write 1 to manually set the interrupt
+ *     bit, read back the interrupt status.
+ * Bit    31 R  IP interrupt status
+ * Bit     2 RW hpd_fall
+ * Bit     1 RW hpd_rise
+ * Bit     0 RW IP interrupt
+ */
+#define HDMITX_TOP_INTR_STAT                    (0x004)
+
+/*
+ * [4]	  hdcp22_rndnum_err
+ * [3]	  nonce_rfrsh_rise
+ * [2]	  hpd_fall
+ * [1]	  hpd_rise
+ * [0]	  core_intr_rise
+ */
+#define HDMITX_TOP_INTR_STAT_CLR                (0x005)
+
+#define HDMITX_TOP_INTR_CORE		BIT(0)
+#define HDMITX_TOP_INTR_HPD_RISE	BIT(1)
+#define HDMITX_TOP_INTR_HPD_FALL	BIT(2)
+
+/* Bit 14:12 RW tmds_sel: 3'b000=Output zero; 3'b001=Output normal TMDS data;
+ *     3'b010=Output PRBS data; 3'b100=Output shift pattern. Default 0.
+ * Bit 11: 9 RW shift_pttn_repeat: 0=New pattern every clk cycle; 1=New pattern
+ *     every 2 clk cycles; ...; 7=New pattern every 8 clk cycles. Default 0.
+ * Bit 8 RW shift_pttn_en: 1= Enable shift pattern generator; 0=Disable.
+ *     Default 0.
+ * Bit 4: 3 RW prbs_pttn_mode: 0=PRBS11; 1=PRBS15; 2=PRBS7; 3=PRBS31. Default 0.
+ * Bit 2: 1 RW prbs_pttn_width: 0=idle; 1=output 8-bit pattern;
+ *     2=Output 1-bit pattern; 3=output 10-bit pattern. Default 0.
+ * Bit 0 RW prbs_pttn_en: 1=Enable PRBS generator; 0=Disable. Default 0.
+ */
+#define HDMITX_TOP_BIST_CNTL                    (0x006)
+
+/* Bit 29:20 RW shift_pttn_data[59:50]. Default 0. */
+/* Bit 19:10 RW shift_pttn_data[69:60]. Default 0. */
+/* Bit  9: 0 RW shift_pttn_data[79:70]. Default 0. */
+#define HDMITX_TOP_SHIFT_PTTN_012               (0x007)
+
+/* Bit 29:20 RW shift_pttn_data[29:20]. Default 0. */
+/* Bit 19:10 RW shift_pttn_data[39:30]. Default 0. */
+/* Bit  9: 0 RW shift_pttn_data[49:40]. Default 0. */
+#define HDMITX_TOP_SHIFT_PTTN_345               (0x008)
+
+/* Bit 19:10 RW shift_pttn_data[ 9: 0]. Default 0. */
+/* Bit  9: 0 RW shift_pttn_data[19:10]. Default 0. */
+#define HDMITX_TOP_SHIFT_PTTN_67                (0x009)
+
+/* Bit 25:16 RW tmds_clk_pttn[19:10]. Default 0. */
+/* Bit  9: 0 RW tmds_clk_pttn[ 9: 0]. Default 0. */
+#define HDMITX_TOP_TMDS_CLK_PTTN_01             (0x00A)
+
+/* Bit 25:16 RW tmds_clk_pttn[39:30]. Default 0. */
+/* Bit  9: 0 RW tmds_clk_pttn[29:20]. Default 0. */
+#define HDMITX_TOP_TMDS_CLK_PTTN_23             (0x00B)
+
+/* Bit 1 RW shift_tmds_clk_pttn:1=Enable shifting clk pattern,
+ * used when TMDS CLK rate = TMDS character rate /4. Default 0.
+ * Bit 0 R  Reserved. Default 0.
+ * [	1] shift_tmds_clk_pttn
+ * [	0] load_tmds_clk_pttn
+ */
+#define HDMITX_TOP_TMDS_CLK_PTTN_CNTL           (0x00C)
+
+/* Bit 0 RW revocmem_wr_fail: Read back 1 to indicate Host write REVOC MEM
+ * failure, write 1 to clear the failure flag.  Default 0.
+ */
+#define HDMITX_TOP_REVOCMEM_STAT                (0x00D)
+
+/* Bit     0 R  filtered HPD status. */
+#define HDMITX_TOP_STAT0                        (0x00E)
+
+#endif /* __MESON_DW_HDMI_H */