drm/exynos: Add DECON driver

This patch is based on exynos-drm-next branch of Inki Dae's tree at:
git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos.git

DECON(Display and Enhancement Controller) is the new IP
in exynos7 SOC for generating video signals using pixel data.

DECON driver can be used to drive 2 different interfaces on Exynos7:
DECON-INT(video controller) and DECON-EXT(Mixer for HDMI)

The existing FIMD driver code was used as a template to create
DECON driver. Only DECON-INT is supported as of now, and
DECON-EXT support will be added later.

The current version of the driver supports video mode displays.

Changelog v2:
- Change config name, DRM_EXYNOS_DECON to DRM_EXYNOS7_DECON.

Signed-off-by: Akshu Agrawal <akshua@gmail.com>
Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

1 files changed, 349 insertions, 0 deletions

diff --git a/include/video/exynos7_decon.h b/include/video/exynos7_decon.h
new file mode 100644
index 000000000000..a62b11b613f6
--- /dev/null
+++ b/include/video/exynos7_decon.h
@@ -0,0 +1,349 @@
+/* include/video/exynos7_decon.h
+ *
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd.
+ * Author: Ajay Kumar <ajaykumar.rs@samsung.com>
+ *
+ * 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.
+ */
+
+/* VIDCON0 */
+#define VIDCON0					0x00
+
+#define VIDCON0_SWRESET				(1 << 28)
+#define VIDCON0_DECON_STOP_STATUS		(1 << 2)
+#define VIDCON0_ENVID				(1 << 1)
+#define VIDCON0_ENVID_F				(1 << 0)
+
+/* VIDOUTCON0 */
+#define VIDOUTCON0				0x4
+
+#define VIDOUTCON0_DUAL_MASK			(0x3 << 24)
+#define VIDOUTCON0_DUAL_ON			(0x3 << 24)
+#define VIDOUTCON0_DISP_IF_1_ON			(0x2 << 24)
+#define VIDOUTCON0_DISP_IF_0_ON			(0x1 << 24)
+#define VIDOUTCON0_DUAL_OFF			(0x0 << 24)
+#define VIDOUTCON0_IF_SHIFT			23
+#define VIDOUTCON0_IF_MASK			(0x1 << 23)
+#define VIDOUTCON0_RGBIF			(0x0 << 23)
+#define VIDOUTCON0_I80IF			(0x1 << 23)
+
+/* VIDCON3 */
+#define VIDCON3					0x8
+
+/* VIDCON4 */
+#define VIDCON4					0xC
+#define VIDCON4_FIFOCNT_START_EN		(1 << 0)
+
+/* VCLKCON0 */
+#define VCLKCON0				0x10
+#define VCLKCON0_CLKVALUP			(1 << 8)
+#define VCLKCON0_VCLKFREE			(1 << 0)
+
+/* VCLKCON */
+#define VCLKCON1				0x14
+#define VCLKCON1_CLKVAL_NUM_VCLK(val)		(((val) & 0xff) << 0)
+#define VCLKCON2				0x18
+
+/* SHADOWCON */
+#define SHADOWCON				0x30
+
+#define SHADOWCON_WINx_PROTECT(_win)		(1 << (10 + (_win)))
+
+/* WINCONx */
+#define WINCON(_win)				(0x50 + ((_win) * 4))
+
+#define WINCONx_BUFSTATUS			(0x3 << 30)
+#define WINCONx_BUFSEL_MASK			(0x3 << 28)
+#define WINCONx_BUFSEL_SHIFT			28
+#define WINCONx_TRIPLE_BUF_MODE			(0x1 << 18)
+#define WINCONx_DOUBLE_BUF_MODE			(0x0 << 18)
+#define WINCONx_BURSTLEN_16WORD			(0x0 << 11)
+#define WINCONx_BURSTLEN_8WORD			(0x1 << 11)
+#define WINCONx_BURSTLEN_MASK			(0x1 << 11)
+#define WINCONx_BURSTLEN_SHIFT			11
+#define WINCONx_BLD_PLANE			(0 << 8)
+#define WINCONx_BLD_PIX				(1 << 8)
+#define WINCONx_ALPHA_MUL			(1 << 7)
+
+#define WINCONx_BPPMODE_MASK			(0xf << 2)
+#define WINCONx_BPPMODE_SHIFT			2
+#define WINCONx_BPPMODE_16BPP_565		(0x8 << 2)
+#define WINCONx_BPPMODE_24BPP_BGRx		(0x7 << 2)
+#define WINCONx_BPPMODE_24BPP_RGBx		(0x6 << 2)
+#define WINCONx_BPPMODE_24BPP_xBGR		(0x5 << 2)
+#define WINCONx_BPPMODE_24BPP_xRGB		(0x4 << 2)
+#define WINCONx_BPPMODE_32BPP_BGRA		(0x3 << 2)
+#define WINCONx_BPPMODE_32BPP_RGBA		(0x2 << 2)
+#define WINCONx_BPPMODE_32BPP_ABGR		(0x1 << 2)
+#define WINCONx_BPPMODE_32BPP_ARGB		(0x0 << 2)
+#define WINCONx_ALPHA_SEL			(1 << 1)
+#define WINCONx_ENWIN				(1 << 0)
+
+#define WINCON1_ALPHA_MUL_F			(1 << 7)
+#define WINCON2_ALPHA_MUL_F			(1 << 7)
+#define WINCON3_ALPHA_MUL_F			(1 << 7)
+#define WINCON4_ALPHA_MUL_F			(1 << 7)
+
+/*  VIDOSDxH: The height for the OSD image(READ ONLY)*/
+#define VIDOSD_H(_x)				(0x80 + ((_x) * 4))
+
+/* Frame buffer start addresses: VIDWxxADD0n */
+#define VIDW_BUF_START(_win)			(0x80 + ((_win) * 0x10))
+#define VIDW_BUF_START1(_win)			(0x84 + ((_win) * 0x10))
+#define VIDW_BUF_START2(_win)			(0x88 + ((_win) * 0x10))
+
+#define VIDW_WHOLE_X(_win)			(0x0130 + ((_win) * 8))
+#define VIDW_WHOLE_Y(_win)			(0x0134 + ((_win) * 8))
+#define VIDW_OFFSET_X(_win)			(0x0170 + ((_win) * 8))
+#define VIDW_OFFSET_Y(_win)			(0x0174 + ((_win) * 8))
+#define VIDW_BLKOFFSET(_win)			(0x01B0 + ((_win) * 4))
+#define VIDW_BLKSIZE(win)			(0x0200 + ((_win) * 4))
+
+/* Interrupt controls register */
+#define VIDINTCON2				0x228
+
+#define VIDINTCON1_INTEXTRA1_EN			(1 << 1)
+#define VIDINTCON1_INTEXTRA0_EN			(1 << 0)
+
+/* Interrupt controls and status register */
+#define VIDINTCON3				0x22C
+
+#define VIDINTCON1_INTEXTRA1_PEND		(1 << 1)
+#define VIDINTCON1_INTEXTRA0_PEND		(1 << 0)
+
+/* VIDOSDxA ~ VIDOSDxE */
+#define VIDOSD_BASE				0x230
+
+#define OSD_STRIDE				0x20
+
+#define VIDOSD_A(_win)				(VIDOSD_BASE + \
+						((_win) * OSD_STRIDE) + 0x00)
+#define VIDOSD_B(_win)				(VIDOSD_BASE + \
+						((_win) * OSD_STRIDE) + 0x04)
+#define VIDOSD_C(_win)				(VIDOSD_BASE + \
+						((_win) * OSD_STRIDE) + 0x08)
+#define VIDOSD_D(_win)				(VIDOSD_BASE + \
+						((_win) * OSD_STRIDE) + 0x0C)
+#define VIDOSD_E(_win)				(VIDOSD_BASE + \
+						((_win) * OSD_STRIDE) + 0x10)
+
+#define VIDOSDxA_TOPLEFT_X_MASK			(0x1fff << 13)
+#define VIDOSDxA_TOPLEFT_X_SHIFT		13
+#define VIDOSDxA_TOPLEFT_X_LIMIT		0x1fff
+#define VIDOSDxA_TOPLEFT_X(_x)			(((_x) & 0x1fff) << 13)
+
+#define VIDOSDxA_TOPLEFT_Y_MASK			(0x1fff << 0)
+#define VIDOSDxA_TOPLEFT_Y_SHIFT		0
+#define VIDOSDxA_TOPLEFT_Y_LIMIT		0x1fff
+#define VIDOSDxA_TOPLEFT_Y(_x)			(((_x) & 0x1fff) << 0)
+
+#define VIDOSDxB_BOTRIGHT_X_MASK		(0x1fff << 13)
+#define VIDOSDxB_BOTRIGHT_X_SHIFT		13
+#define VIDOSDxB_BOTRIGHT_X_LIMIT		0x1fff
+#define VIDOSDxB_BOTRIGHT_X(_x)			(((_x) & 0x1fff) << 13)
+
+#define VIDOSDxB_BOTRIGHT_Y_MASK		(0x1fff << 0)
+#define VIDOSDxB_BOTRIGHT_Y_SHIFT		0
+#define VIDOSDxB_BOTRIGHT_Y_LIMIT		0x1fff
+#define VIDOSDxB_BOTRIGHT_Y(_x)			(((_x) & 0x1fff) << 0)
+
+#define VIDOSDxC_ALPHA0_R_F(_x)			(((_x) & 0xFF) << 16)
+#define VIDOSDxC_ALPHA0_G_F(_x)			(((_x) & 0xFF) << 8)
+#define VIDOSDxC_ALPHA0_B_F(_x)			(((_x) & 0xFF) << 0)
+
+#define VIDOSDxD_ALPHA1_R_F(_x)			(((_x) & 0xFF) << 16)
+#define VIDOSDxD_ALPHA1_G_F(_x)			(((_x) & 0xFF) << 8)
+#define VIDOSDxD_ALPHA1_B_F(_x)			(((_x) & 0xFF) >> 0)
+
+/* Window MAP (Color map) */
+#define WINxMAP(_win)				(0x340 + ((_win) * 4))
+
+#define WINxMAP_MAP				(1 << 24)
+#define WINxMAP_MAP_COLOUR_MASK			(0xffffff << 0)
+#define WINxMAP_MAP_COLOUR_SHIFT		0
+#define WINxMAP_MAP_COLOUR_LIMIT		0xffffff
+#define WINxMAP_MAP_COLOUR(_x)			((_x) << 0)
+
+/* Window colour-key control registers */
+#define WKEYCON					0x370
+
+#define WKEYCON0				0x00
+#define WKEYCON1				0x04
+#define WxKEYCON0_KEYBL_EN			(1 << 26)
+#define WxKEYCON0_KEYEN_F			(1 << 25)
+#define WxKEYCON0_DIRCON			(1 << 24)
+#define WxKEYCON0_COMPKEY_MASK			(0xffffff << 0)
+#define WxKEYCON0_COMPKEY_SHIFT			0
+#define WxKEYCON0_COMPKEY_LIMIT			0xffffff
+#define WxKEYCON0_COMPKEY(_x)			((_x) << 0)
+#define WxKEYCON1_COLVAL_MASK			(0xffffff << 0)
+#define WxKEYCON1_COLVAL_SHIFT			0
+#define WxKEYCON1_COLVAL_LIMIT			0xffffff
+#define WxKEYCON1_COLVAL(_x)			((_x) << 0)
+
+/* color key control register for hardware window 1 ~ 4. */
+#define WKEYCON0_BASE(x)		((WKEYCON + WKEYCON0) + ((x - 1) * 8))
+/* color key value register for hardware window 1 ~ 4. */
+#define WKEYCON1_BASE(x)		((WKEYCON + WKEYCON1) + ((x - 1) * 8))
+
+/* Window KEY Alpha value */
+#define WxKEYALPHA(_win)			(0x3A0 + (((_win) - 1) * 0x4))
+
+#define Wx_KEYALPHA_R_F_SHIFT			16
+#define Wx_KEYALPHA_G_F_SHIFT			8
+#define Wx_KEYALPHA_B_F_SHIFT			0
+
+/* Blending equation */
+#define BLENDE(_win)				(0x03C0 + ((_win) * 4))
+#define BLENDE_COEF_ZERO			0x0
+#define BLENDE_COEF_ONE				0x1
+#define BLENDE_COEF_ALPHA_A			0x2
+#define BLENDE_COEF_ONE_MINUS_ALPHA_A		0x3
+#define BLENDE_COEF_ALPHA_B			0x4
+#define BLENDE_COEF_ONE_MINUS_ALPHA_B		0x5
+#define BLENDE_COEF_ALPHA0			0x6
+#define BLENDE_COEF_A				0xA
+#define BLENDE_COEF_ONE_MINUS_A			0xB
+#define BLENDE_COEF_B				0xC
+#define BLENDE_COEF_ONE_MINUS_B			0xD
+#define BLENDE_Q_FUNC(_v)			((_v) << 18)
+#define BLENDE_P_FUNC(_v)			((_v) << 12)
+#define BLENDE_B_FUNC(_v)			((_v) << 6)
+#define BLENDE_A_FUNC(_v)			((_v) << 0)
+
+/* Blending equation control */
+#define BLENDCON				0x3D8
+#define BLENDCON_NEW_MASK			(1 << 0)
+#define BLENDCON_NEW_8BIT_ALPHA_VALUE		(1 << 0)
+#define BLENDCON_NEW_4BIT_ALPHA_VALUE		(0 << 0)
+
+/* Interrupt control register */
+#define VIDINTCON0				0x500
+
+#define VIDINTCON0_WAKEUP_MASK			(0x3f << 26)
+#define VIDINTCON0_INTEXTRAEN			(1 << 21)
+
+#define VIDINTCON0_FRAMESEL0_SHIFT		15
+#define VIDINTCON0_FRAMESEL0_MASK		(0x3 << 15)
+#define VIDINTCON0_FRAMESEL0_BACKPORCH		(0x0 << 15)
+#define VIDINTCON0_FRAMESEL0_VSYNC		(0x1 << 15)
+#define VIDINTCON0_FRAMESEL0_ACTIVE		(0x2 << 15)
+#define VIDINTCON0_FRAMESEL0_FRONTPORCH		(0x3 << 15)
+
+#define VIDINTCON0_INT_FRAME			(1 << 11)
+
+#define VIDINTCON0_FIFOLEVEL_MASK		(0x7 << 3)
+#define VIDINTCON0_FIFOLEVEL_SHIFT		3
+#define VIDINTCON0_FIFOLEVEL_EMPTY		(0x0 << 3)
+#define VIDINTCON0_FIFOLEVEL_TO25PC		(0x1 << 3)
+#define VIDINTCON0_FIFOLEVEL_TO50PC		(0x2 << 3)
+#define VIDINTCON0_FIFOLEVEL_FULL		(0x4 << 3)
+
+#define VIDINTCON0_FIFOSEL_MAIN_EN		(1 << 1)
+#define VIDINTCON0_INT_FIFO			(1 << 1)
+
+#define VIDINTCON0_INT_ENABLE			(1 << 0)
+
+/* Interrupt controls and status register */
+#define VIDINTCON1				0x504
+
+#define VIDINTCON1_INT_EXTRA			(1 << 3)
+#define VIDINTCON1_INT_I80			(1 << 2)
+#define VIDINTCON1_INT_FRAME			(1 << 1)
+#define VIDINTCON1_INT_FIFO			(1 << 0)
+
+/* VIDCON1 */
+#define VIDCON1(_x)				(0x0600 + ((_x) * 0x50))
+#define VIDCON1_LINECNT_GET(_v)			(((_v) >> 17) & 0x1fff)
+#define VIDCON1_VCLK_MASK			(0x3 << 9)
+#define VIDCON1_VCLK_HOLD			(0x0 << 9)
+#define VIDCON1_VCLK_RUN			(0x1 << 9)
+#define VIDCON1_VCLK_RUN_VDEN_DISABLE		(0x3 << 9)
+#define VIDCON1_RGB_ORDER_O_MASK		(0x7 << 4)
+#define VIDCON1_RGB_ORDER_O_RGB			(0x0 << 4)
+#define VIDCON1_RGB_ORDER_O_GBR			(0x1 << 4)
+#define VIDCON1_RGB_ORDER_O_BRG			(0x2 << 4)
+#define VIDCON1_RGB_ORDER_O_BGR			(0x4 << 4)
+#define VIDCON1_RGB_ORDER_O_RBG			(0x5 << 4)
+#define VIDCON1_RGB_ORDER_O_GRB			(0x6 << 4)
+
+/* VIDTCON0 */
+#define VIDTCON0				0x610
+
+#define VIDTCON0_VBPD_MASK			(0xffff << 16)
+#define VIDTCON0_VBPD_SHIFT			16
+#define VIDTCON0_VBPD_LIMIT			0xffff
+#define VIDTCON0_VBPD(_x)			((_x) << 16)
+
+#define VIDTCON0_VFPD_MASK			(0xffff << 0)
+#define VIDTCON0_VFPD_SHIFT			0
+#define VIDTCON0_VFPD_LIMIT			0xffff
+#define VIDTCON0_VFPD(_x)			((_x) << 0)
+
+/* VIDTCON1 */
+#define VIDTCON1				0x614
+
+#define VIDTCON1_VSPW_MASK			(0xffff << 16)
+#define VIDTCON1_VSPW_SHIFT			16
+#define VIDTCON1_VSPW_LIMIT			0xffff
+#define VIDTCON1_VSPW(_x)			((_x) << 16)
+
+/* VIDTCON2 */
+#define VIDTCON2				0x618
+
+#define VIDTCON2_HBPD_MASK			(0xffff << 16)
+#define VIDTCON2_HBPD_SHIFT			16
+#define VIDTCON2_HBPD_LIMIT			0xffff
+#define VIDTCON2_HBPD(_x)			((_x) << 16)
+
+#define VIDTCON2_HFPD_MASK			(0xffff << 0)
+#define VIDTCON2_HFPD_SHIFT			0
+#define VIDTCON2_HFPD_LIMIT			0xffff
+#define VIDTCON2_HFPD(_x)			((_x) << 0)
+
+/* VIDTCON3 */
+#define VIDTCON3				0x61C
+
+#define VIDTCON3_HSPW_MASK			(0xffff << 16)
+#define VIDTCON3_HSPW_SHIFT			16
+#define VIDTCON3_HSPW_LIMIT			0xffff
+#define VIDTCON3_HSPW(_x)			((_x) << 16)
+
+/* VIDTCON4 */
+#define VIDTCON4				0x620
+
+#define VIDTCON4_LINEVAL_MASK			(0xfff << 16)
+#define VIDTCON4_LINEVAL_SHIFT			16
+#define VIDTCON4_LINEVAL_LIMIT			0xfff
+#define VIDTCON4_LINEVAL(_x)			(((_x) & 0xfff) << 16)
+
+#define VIDTCON4_HOZVAL_MASK			(0xfff << 0)
+#define VIDTCON4_HOZVAL_SHIFT			0
+#define VIDTCON4_HOZVAL_LIMIT			0xfff
+#define VIDTCON4_HOZVAL(_x)			(((_x) & 0xfff) << 0)
+
+/* LINECNT OP THRSHOLD*/
+#define LINECNT_OP_THRESHOLD			0x630
+
+/* CRCCTRL */
+#define CRCCTRL					0x6C8
+#define CRCCTRL_CRCCLKEN			(0x1 << 2)
+#define CRCCTRL_CRCSTART_F			(0x1 << 1)
+#define CRCCTRL_CRCEN				(0x1 << 0)
+
+/* DECON_CMU */
+#define DECON_CMU				0x704
+
+#define DECON_CMU_ALL_CLKGATE_ENABLE		0x3
+#define DECON_CMU_SE_CLKGATE_ENABLE		(0x1 << 2)
+#define DECON_CMU_SFR_CLKGATE_ENABLE		(0x1 << 1)
+#define DECON_CMU_MEM_CLKGATE_ENABLE		(0x1 << 0)
+
+/* DECON_UPDATE */
+#define DECON_UPDATE				0x710
+
+#define DECON_UPDATE_SLAVE_SYNC			(1 << 4)
+#define DECON_UPDATE_STANDALONE_F		(1 << 0)