drm/mediatek: Add DSI sub driver
This patch add a drm encoder/connector driver for the MIPI DSI function block of the Mediatek display subsystem and a phy driver for the MIPI TX D-PHY control module. Signed-off-by: Jitao Shi <jitao.shi@mediatek.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
CK Hu
Philipp Zabel
parent
119f517362
commit
2e54c14e31
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@ -4,6 +4,8 @@ config DRM_MEDIATEK
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depends on ARCH_MEDIATEK || (ARM && COMPILE_TEST)
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select DRM_GEM_CMA_HELPER
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select DRM_KMS_HELPER
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select DRM_MIPI_DSI
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select DRM_PANEL
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select IOMMU_DMA
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select MEMORY
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select MTK_SMI
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@ -6,6 +6,8 @@ mediatek-drm-y := mtk_disp_ovl.o \
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mtk_drm_drv.o \
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mtk_drm_fb.o \
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mtk_drm_gem.o \
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mtk_drm_plane.o
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mtk_drm_plane.o \
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mtk_dsi.o \
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mtk_mipi_tx.o
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obj-$(CONFIG_DRM_MEDIATEK) += mediatek-drm.o
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@ -523,6 +523,8 @@ static struct platform_driver * const mtk_drm_drivers[] = {
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&mtk_disp_ovl_driver,
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&mtk_disp_rdma_driver,
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&mtk_drm_platform_driver,
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&mtk_dsi_driver,
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&mtk_mipi_tx_driver,
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};
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static int __init mtk_drm_init(void)
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@ -53,5 +53,7 @@ struct mtk_drm_private {
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extern struct platform_driver mtk_ddp_driver;
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extern struct platform_driver mtk_disp_ovl_driver;
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extern struct platform_driver mtk_disp_rdma_driver;
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extern struct platform_driver mtk_dsi_driver;
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extern struct platform_driver mtk_mipi_tx_driver;
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#endif /* MTK_DRM_DRV_H */
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@ -0,0 +1,913 @@
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/*
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* Copyright (c) 2015 MediaTek Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <drm/drmP.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_mipi_dsi.h>
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#include <drm/drm_panel.h>
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#include <linux/clk.h>
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#include <linux/component.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/of_graph.h>
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#include <linux/phy/phy.h>
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#include <linux/platform_device.h>
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#include <video/videomode.h>
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#include "mtk_drm_ddp_comp.h"
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#define DSI_VIDEO_FIFO_DEPTH (1920 / 4)
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#define DSI_HOST_FIFO_DEPTH 64
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#define DSI_START 0x00
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#define DSI_CON_CTRL 0x10
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#define DSI_RESET BIT(0)
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#define DSI_EN BIT(1)
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#define DSI_MODE_CTRL 0x14
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#define MODE (3)
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#define CMD_MODE 0
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#define SYNC_PULSE_MODE 1
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#define SYNC_EVENT_MODE 2
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#define BURST_MODE 3
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#define FRM_MODE BIT(16)
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#define MIX_MODE BIT(17)
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#define DSI_TXRX_CTRL 0x18
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#define VC_NUM (2 << 0)
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#define LANE_NUM (0xf << 2)
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#define DIS_EOT BIT(6)
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#define NULL_EN BIT(7)
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#define TE_FREERUN BIT(8)
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#define EXT_TE_EN BIT(9)
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#define EXT_TE_EDGE BIT(10)
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#define MAX_RTN_SIZE (0xf << 12)
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#define HSTX_CKLP_EN BIT(16)
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#define DSI_PSCTRL 0x1c
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#define DSI_PS_WC 0x3fff
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#define DSI_PS_SEL (3 << 16)
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#define PACKED_PS_16BIT_RGB565 (0 << 16)
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#define LOOSELY_PS_18BIT_RGB666 (1 << 16)
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#define PACKED_PS_18BIT_RGB666 (2 << 16)
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#define PACKED_PS_24BIT_RGB888 (3 << 16)
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#define DSI_VSA_NL 0x20
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#define DSI_VBP_NL 0x24
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#define DSI_VFP_NL 0x28
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#define DSI_VACT_NL 0x2C
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#define DSI_HSA_WC 0x50
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#define DSI_HBP_WC 0x54
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#define DSI_HFP_WC 0x58
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#define DSI_HSTX_CKL_WC 0x64
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#define DSI_PHY_LCCON 0x104
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#define LC_HS_TX_EN BIT(0)
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#define LC_ULPM_EN BIT(1)
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#define LC_WAKEUP_EN BIT(2)
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#define DSI_PHY_LD0CON 0x108
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#define LD0_HS_TX_EN BIT(0)
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#define LD0_ULPM_EN BIT(1)
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#define LD0_WAKEUP_EN BIT(2)
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#define DSI_PHY_TIMECON0 0x110
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#define LPX (0xff << 0)
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#define HS_PRPR (0xff << 8)
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#define HS_ZERO (0xff << 16)
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#define HS_TRAIL (0xff << 24)
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#define DSI_PHY_TIMECON1 0x114
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#define TA_GO (0xff << 0)
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#define TA_SURE (0xff << 8)
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#define TA_GET (0xff << 16)
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#define DA_HS_EXIT (0xff << 24)
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#define DSI_PHY_TIMECON2 0x118
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#define CONT_DET (0xff << 0)
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#define CLK_ZERO (0xff << 16)
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#define CLK_TRAIL (0xff << 24)
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#define DSI_PHY_TIMECON3 0x11c
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#define CLK_HS_PRPR (0xff << 0)
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#define CLK_HS_POST (0xff << 8)
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#define CLK_HS_EXIT (0xff << 16)
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#define NS_TO_CYCLE(n, c) ((n) / (c) + (((n) % (c)) ? 1 : 0))
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struct phy;
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struct mtk_dsi {
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struct mtk_ddp_comp ddp_comp;
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struct device *dev;
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struct mipi_dsi_host host;
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struct drm_encoder encoder;
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struct drm_connector conn;
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struct drm_panel *panel;
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struct drm_bridge *bridge;
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struct phy *phy;
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void __iomem *regs;
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struct clk *engine_clk;
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struct clk *digital_clk;
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struct clk *hs_clk;
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u32 data_rate;
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unsigned long mode_flags;
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enum mipi_dsi_pixel_format format;
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unsigned int lanes;
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struct videomode vm;
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int refcount;
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bool enabled;
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};
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static inline struct mtk_dsi *encoder_to_dsi(struct drm_encoder *e)
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{
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return container_of(e, struct mtk_dsi, encoder);
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}
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static inline struct mtk_dsi *connector_to_dsi(struct drm_connector *c)
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{
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return container_of(c, struct mtk_dsi, conn);
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}
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static inline struct mtk_dsi *host_to_dsi(struct mipi_dsi_host *h)
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{
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return container_of(h, struct mtk_dsi, host);
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}
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static void mtk_dsi_mask(struct mtk_dsi *dsi, u32 offset, u32 mask, u32 data)
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{
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u32 temp = readl(dsi->regs + offset);
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writel((temp & ~mask) | (data & mask), dsi->regs + offset);
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}
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static void dsi_phy_timconfig(struct mtk_dsi *dsi)
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{
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u32 timcon0, timcon1, timcon2, timcon3;
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unsigned int ui, cycle_time;
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unsigned int lpx;
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ui = 1000 / dsi->data_rate + 0x01;
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cycle_time = 8000 / dsi->data_rate + 0x01;
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lpx = 5;
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timcon0 = (8 << 24) | (0xa << 16) | (0x6 << 8) | lpx;
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timcon1 = (7 << 24) | (5 * lpx << 16) | ((3 * lpx) / 2) << 8 |
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(4 * lpx);
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timcon2 = ((NS_TO_CYCLE(0x64, cycle_time) + 0xa) << 24) |
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(NS_TO_CYCLE(0x150, cycle_time) << 16);
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timcon3 = (2 * lpx) << 16 | NS_TO_CYCLE(80 + 52 * ui, cycle_time) << 8 |
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NS_TO_CYCLE(0x40, cycle_time);
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writel(timcon0, dsi->regs + DSI_PHY_TIMECON0);
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writel(timcon1, dsi->regs + DSI_PHY_TIMECON1);
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writel(timcon2, dsi->regs + DSI_PHY_TIMECON2);
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writel(timcon3, dsi->regs + DSI_PHY_TIMECON3);
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}
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static void mtk_dsi_enable(struct mtk_dsi *dsi)
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{
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mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_EN, DSI_EN);
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}
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static void mtk_dsi_disable(struct mtk_dsi *dsi)
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{
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mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_EN, 0);
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}
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static void mtk_dsi_reset(struct mtk_dsi *dsi)
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{
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mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_RESET, DSI_RESET);
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mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_RESET, 0);
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}
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static int mtk_dsi_poweron(struct mtk_dsi *dsi)
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{
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struct device *dev = dsi->dev;
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int ret;
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if (++dsi->refcount != 1)
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return 0;
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/**
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* data_rate = (pixel_clock / 1000) * pixel_dipth * mipi_ratio;
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* pixel_clock unit is Khz, data_rata unit is MHz, so need divide 1000.
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* mipi_ratio is mipi clk coefficient for balance the pixel clk in mipi.
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* we set mipi_ratio is 1.05.
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*/
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dsi->data_rate = dsi->vm.pixelclock * 3 * 21 / (1 * 1000 * 10);
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ret = clk_set_rate(dsi->hs_clk, dsi->data_rate * 1000000);
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if (ret < 0) {
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dev_err(dev, "Failed to set data rate: %d\n", ret);
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goto err_refcount;
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}
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phy_power_on(dsi->phy);
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ret = clk_prepare_enable(dsi->engine_clk);
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if (ret < 0) {
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dev_err(dev, "Failed to enable engine clock: %d\n", ret);
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goto err_phy_power_off;
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}
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ret = clk_prepare_enable(dsi->digital_clk);
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if (ret < 0) {
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dev_err(dev, "Failed to enable digital clock: %d\n", ret);
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goto err_disable_engine_clk;
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}
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mtk_dsi_enable(dsi);
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mtk_dsi_reset(dsi);
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dsi_phy_timconfig(dsi);
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return 0;
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err_disable_engine_clk:
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clk_disable_unprepare(dsi->engine_clk);
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err_phy_power_off:
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phy_power_off(dsi->phy);
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err_refcount:
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dsi->refcount--;
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return ret;
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}
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static void dsi_clk_ulp_mode_enter(struct mtk_dsi *dsi)
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{
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mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_HS_TX_EN, 0);
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mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_ULPM_EN, 0);
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}
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static void dsi_clk_ulp_mode_leave(struct mtk_dsi *dsi)
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{
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mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_ULPM_EN, 0);
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mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_WAKEUP_EN, LC_WAKEUP_EN);
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mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_WAKEUP_EN, 0);
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}
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static void dsi_lane0_ulp_mode_enter(struct mtk_dsi *dsi)
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{
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mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_HS_TX_EN, 0);
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mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_ULPM_EN, 0);
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}
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static void dsi_lane0_ulp_mode_leave(struct mtk_dsi *dsi)
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{
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mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_ULPM_EN, 0);
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mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_WAKEUP_EN, LD0_WAKEUP_EN);
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mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_WAKEUP_EN, 0);
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}
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static bool dsi_clk_hs_state(struct mtk_dsi *dsi)
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{
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u32 tmp_reg1;
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tmp_reg1 = readl(dsi->regs + DSI_PHY_LCCON);
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return ((tmp_reg1 & LC_HS_TX_EN) == 1) ? true : false;
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}
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static void dsi_clk_hs_mode(struct mtk_dsi *dsi, bool enter)
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{
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if (enter && !dsi_clk_hs_state(dsi))
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mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_HS_TX_EN, LC_HS_TX_EN);
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else if (!enter && dsi_clk_hs_state(dsi))
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mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_HS_TX_EN, 0);
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}
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static void dsi_set_mode(struct mtk_dsi *dsi)
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{
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u32 vid_mode = CMD_MODE;
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if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) {
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vid_mode = SYNC_PULSE_MODE;
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if ((dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) &&
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!(dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE))
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vid_mode = BURST_MODE;
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}
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writel(vid_mode, dsi->regs + DSI_MODE_CTRL);
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}
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static void dsi_ps_control_vact(struct mtk_dsi *dsi)
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{
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struct videomode *vm = &dsi->vm;
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u32 dsi_buf_bpp, ps_wc;
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u32 ps_bpp_mode;
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if (dsi->format == MIPI_DSI_FMT_RGB565)
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dsi_buf_bpp = 2;
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else
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dsi_buf_bpp = 3;
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ps_wc = vm->hactive * dsi_buf_bpp;
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ps_bpp_mode = ps_wc;
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switch (dsi->format) {
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case MIPI_DSI_FMT_RGB888:
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ps_bpp_mode |= PACKED_PS_24BIT_RGB888;
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break;
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case MIPI_DSI_FMT_RGB666:
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ps_bpp_mode |= PACKED_PS_18BIT_RGB666;
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break;
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case MIPI_DSI_FMT_RGB666_PACKED:
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ps_bpp_mode |= LOOSELY_PS_18BIT_RGB666;
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break;
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case MIPI_DSI_FMT_RGB565:
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ps_bpp_mode |= PACKED_PS_16BIT_RGB565;
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break;
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}
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writel(vm->vactive, dsi->regs + DSI_VACT_NL);
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writel(ps_bpp_mode, dsi->regs + DSI_PSCTRL);
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writel(ps_wc, dsi->regs + DSI_HSTX_CKL_WC);
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}
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static void dsi_rxtx_control(struct mtk_dsi *dsi)
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{
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u32 tmp_reg;
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switch (dsi->lanes) {
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case 1:
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tmp_reg = 1 << 2;
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break;
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case 2:
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tmp_reg = 3 << 2;
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break;
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case 3:
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tmp_reg = 7 << 2;
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break;
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case 4:
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tmp_reg = 0xf << 2;
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break;
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default:
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tmp_reg = 0xf << 2;
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break;
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}
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writel(tmp_reg, dsi->regs + DSI_TXRX_CTRL);
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}
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static void dsi_ps_control(struct mtk_dsi *dsi)
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{
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unsigned int dsi_tmp_buf_bpp;
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u32 tmp_reg;
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switch (dsi->format) {
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case MIPI_DSI_FMT_RGB888:
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tmp_reg = PACKED_PS_24BIT_RGB888;
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dsi_tmp_buf_bpp = 3;
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break;
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case MIPI_DSI_FMT_RGB666:
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tmp_reg = LOOSELY_PS_18BIT_RGB666;
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dsi_tmp_buf_bpp = 3;
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break;
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case MIPI_DSI_FMT_RGB666_PACKED:
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tmp_reg = PACKED_PS_18BIT_RGB666;
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dsi_tmp_buf_bpp = 3;
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break;
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case MIPI_DSI_FMT_RGB565:
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tmp_reg = PACKED_PS_16BIT_RGB565;
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dsi_tmp_buf_bpp = 2;
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break;
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default:
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tmp_reg = PACKED_PS_24BIT_RGB888;
|
||||
dsi_tmp_buf_bpp = 3;
|
||||
break;
|
||||
}
|
||||
|
||||
tmp_reg += dsi->vm.hactive * dsi_tmp_buf_bpp & DSI_PS_WC;
|
||||
writel(tmp_reg, dsi->regs + DSI_PSCTRL);
|
||||
}
|
||||
|
||||
static void dsi_config_vdo_timing(struct mtk_dsi *dsi)
|
||||
{
|
||||
unsigned int horizontal_sync_active_byte;
|
||||
unsigned int horizontal_backporch_byte;
|
||||
unsigned int horizontal_frontporch_byte;
|
||||
unsigned int dsi_tmp_buf_bpp;
|
||||
|
||||
struct videomode *vm = &dsi->vm;
|
||||
|
||||
if (dsi->format == MIPI_DSI_FMT_RGB565)
|
||||
dsi_tmp_buf_bpp = 2;
|
||||
else
|
||||
dsi_tmp_buf_bpp = 3;
|
||||
|
||||
writel(vm->vsync_len, dsi->regs + DSI_VSA_NL);
|
||||
writel(vm->vback_porch, dsi->regs + DSI_VBP_NL);
|
||||
writel(vm->vfront_porch, dsi->regs + DSI_VFP_NL);
|
||||
writel(vm->vactive, dsi->regs + DSI_VACT_NL);
|
||||
|
||||
horizontal_sync_active_byte = (vm->hsync_len * dsi_tmp_buf_bpp - 10);
|
||||
|
||||
if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
|
||||
horizontal_backporch_byte =
|
||||
(vm->hback_porch * dsi_tmp_buf_bpp - 10);
|
||||
else
|
||||
horizontal_backporch_byte = ((vm->hback_porch + vm->hsync_len) *
|
||||
dsi_tmp_buf_bpp - 10);
|
||||
|
||||
horizontal_frontporch_byte = (vm->hfront_porch * dsi_tmp_buf_bpp - 12);
|
||||
|
||||
writel(horizontal_sync_active_byte, dsi->regs + DSI_HSA_WC);
|
||||
writel(horizontal_backporch_byte, dsi->regs + DSI_HBP_WC);
|
||||
writel(horizontal_frontporch_byte, dsi->regs + DSI_HFP_WC);
|
||||
|
||||
dsi_ps_control(dsi);
|
||||
}
|
||||
|
||||
static void mtk_dsi_start(struct mtk_dsi *dsi)
|
||||
{
|
||||
writel(0, dsi->regs + DSI_START);
|
||||
writel(1, dsi->regs + DSI_START);
|
||||
}
|
||||
|
||||
static void mtk_dsi_poweroff(struct mtk_dsi *dsi)
|
||||
{
|
||||
if (WARN_ON(dsi->refcount == 0))
|
||||
return;
|
||||
|
||||
if (--dsi->refcount != 0)
|
||||
return;
|
||||
|
||||
dsi_lane0_ulp_mode_enter(dsi);
|
||||
dsi_clk_ulp_mode_enter(dsi);
|
||||
|
||||
mtk_dsi_disable(dsi);
|
||||
|
||||
clk_disable_unprepare(dsi->engine_clk);
|
||||
clk_disable_unprepare(dsi->digital_clk);
|
||||
|
||||
phy_power_off(dsi->phy);
|
||||
}
|
||||
|
||||
static void mtk_output_dsi_enable(struct mtk_dsi *dsi)
|
||||
{
|
||||
int ret;
|
||||
|
||||
if (dsi->enabled)
|
||||
return;
|
||||
|
||||
if (dsi->panel) {
|
||||
if (drm_panel_prepare(dsi->panel)) {
|
||||
DRM_ERROR("failed to setup the panel\n");
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
ret = mtk_dsi_poweron(dsi);
|
||||
if (ret < 0) {
|
||||
DRM_ERROR("failed to power on dsi\n");
|
||||
return;
|
||||
}
|
||||
|
||||
dsi_rxtx_control(dsi);
|
||||
|
||||
dsi_clk_ulp_mode_leave(dsi);
|
||||
dsi_lane0_ulp_mode_leave(dsi);
|
||||
dsi_clk_hs_mode(dsi, 0);
|
||||
dsi_set_mode(dsi);
|
||||
|
||||
dsi_ps_control_vact(dsi);
|
||||
dsi_config_vdo_timing(dsi);
|
||||
|
||||
dsi_set_mode(dsi);
|
||||
dsi_clk_hs_mode(dsi, 1);
|
||||
|
||||
mtk_dsi_start(dsi);
|
||||
|
||||
dsi->enabled = true;
|
||||
}
|
||||
|
||||
static void mtk_output_dsi_disable(struct mtk_dsi *dsi)
|
||||
{
|
||||
if (!dsi->enabled)
|
||||
return;
|
||||
|
||||
if (dsi->panel) {
|
||||
if (drm_panel_disable(dsi->panel)) {
|
||||
DRM_ERROR("failed to disable the panel\n");
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
mtk_dsi_poweroff(dsi);
|
||||
|
||||
dsi->enabled = false;
|
||||
}
|
||||
|
||||
static void mtk_dsi_encoder_destroy(struct drm_encoder *encoder)
|
||||
{
|
||||
drm_encoder_cleanup(encoder);
|
||||
}
|
||||
|
||||
static const struct drm_encoder_funcs mtk_dsi_encoder_funcs = {
|
||||
.destroy = mtk_dsi_encoder_destroy,
|
||||
};
|
||||
|
||||
static bool mtk_dsi_encoder_mode_fixup(struct drm_encoder *encoder,
|
||||
const struct drm_display_mode *mode,
|
||||
struct drm_display_mode *adjusted_mode)
|
||||
{
|
||||
return true;
|
||||
}
|
||||
|
||||
static void mtk_dsi_encoder_mode_set(struct drm_encoder *encoder,
|
||||
struct drm_display_mode *mode,
|
||||
struct drm_display_mode *adjusted)
|
||||
{
|
||||
struct mtk_dsi *dsi = encoder_to_dsi(encoder);
|
||||
|
||||
dsi->vm.pixelclock = adjusted->clock;
|
||||
dsi->vm.hactive = adjusted->hdisplay;
|
||||
dsi->vm.hback_porch = adjusted->htotal - adjusted->hsync_end;
|
||||
dsi->vm.hfront_porch = adjusted->hsync_start - adjusted->hdisplay;
|
||||
dsi->vm.hsync_len = adjusted->hsync_end - adjusted->hsync_start;
|
||||
|
||||
dsi->vm.vactive = adjusted->vdisplay;
|
||||
dsi->vm.vback_porch = adjusted->vtotal - adjusted->vsync_end;
|
||||
dsi->vm.vfront_porch = adjusted->vsync_start - adjusted->vdisplay;
|
||||
dsi->vm.vsync_len = adjusted->vsync_end - adjusted->vsync_start;
|
||||
}
|
||||
|
||||
static void mtk_dsi_encoder_disable(struct drm_encoder *encoder)
|
||||
{
|
||||
struct mtk_dsi *dsi = encoder_to_dsi(encoder);
|
||||
|
||||
mtk_output_dsi_disable(dsi);
|
||||
}
|
||||
|
||||
static void mtk_dsi_encoder_enable(struct drm_encoder *encoder)
|
||||
{
|
||||
struct mtk_dsi *dsi = encoder_to_dsi(encoder);
|
||||
|
||||
mtk_output_dsi_enable(dsi);
|
||||
}
|
||||
|
||||
static enum drm_connector_status mtk_dsi_connector_detect(
|
||||
struct drm_connector *connector, bool force)
|
||||
{
|
||||
return connector_status_connected;
|
||||
}
|
||||
|
||||
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);
|
||||
}
|
||||
|
||||
static struct drm_encoder *mtk_dsi_connector_best_encoder(
|
||||
struct drm_connector *connector)
|
||||
{
|
||||
struct mtk_dsi *dsi = connector_to_dsi(connector);
|
||||
|
||||
return &dsi->encoder;
|
||||
}
|
||||
|
||||
static const struct drm_encoder_helper_funcs mtk_dsi_encoder_helper_funcs = {
|
||||
.mode_fixup = mtk_dsi_encoder_mode_fixup,
|
||||
.mode_set = mtk_dsi_encoder_mode_set,
|
||||
.disable = mtk_dsi_encoder_disable,
|
||||
.enable = mtk_dsi_encoder_enable,
|
||||
};
|
||||
|
||||
static const struct drm_connector_funcs mtk_dsi_connector_funcs = {
|
||||
.dpms = drm_atomic_helper_connector_dpms,
|
||||
.detect = mtk_dsi_connector_detect,
|
||||
.fill_modes = drm_helper_probe_single_connector_modes,
|
||||
.destroy = drm_connector_cleanup,
|
||||
.reset = drm_atomic_helper_connector_reset,
|
||||
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
|
||||
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
|
||||
};
|
||||
|
||||
static const struct drm_connector_helper_funcs
|
||||
mtk_dsi_connector_helper_funcs = {
|
||||
.get_modes = mtk_dsi_connector_get_modes,
|
||||
.best_encoder = mtk_dsi_connector_best_encoder,
|
||||
};
|
||||
|
||||
static int mtk_drm_attach_bridge(struct drm_bridge *bridge,
|
||||
struct drm_encoder *encoder)
|
||||
{
|
||||
int ret;
|
||||
|
||||
if (!bridge)
|
||||
return -ENOENT;
|
||||
|
||||
encoder->bridge = bridge;
|
||||
bridge->encoder = encoder;
|
||||
ret = drm_bridge_attach(encoder->dev, bridge);
|
||||
if (ret) {
|
||||
DRM_ERROR("Failed to attach bridge to drm\n");
|
||||
encoder->bridge = NULL;
|
||||
bridge->encoder = NULL;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int mtk_dsi_create_connector(struct drm_device *drm, struct mtk_dsi *dsi)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = drm_connector_init(drm, &dsi->conn, &mtk_dsi_connector_funcs,
|
||||
DRM_MODE_CONNECTOR_DSI);
|
||||
if (ret) {
|
||||
DRM_ERROR("Failed to connector init to drm\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
drm_connector_helper_add(&dsi->conn, &mtk_dsi_connector_helper_funcs);
|
||||
|
||||
dsi->conn.dpms = DRM_MODE_DPMS_OFF;
|
||||
drm_mode_connector_attach_encoder(&dsi->conn, &dsi->encoder);
|
||||
|
||||
if (dsi->panel) {
|
||||
ret = drm_panel_attach(dsi->panel, &dsi->conn);
|
||||
if (ret) {
|
||||
DRM_ERROR("Failed to attach panel to drm\n");
|
||||
goto err_connector_cleanup;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
err_connector_cleanup:
|
||||
drm_connector_cleanup(&dsi->conn);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int mtk_dsi_create_conn_enc(struct drm_device *drm, struct mtk_dsi *dsi)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = drm_encoder_init(drm, &dsi->encoder, &mtk_dsi_encoder_funcs,
|
||||
DRM_MODE_ENCODER_DSI, NULL);
|
||||
if (ret) {
|
||||
DRM_ERROR("Failed to encoder init to drm\n");
|
||||
return ret;
|
||||
}
|
||||
drm_encoder_helper_add(&dsi->encoder, &mtk_dsi_encoder_helper_funcs);
|
||||
|
||||
/*
|
||||
* Currently display data paths are statically assigned to a crtc each.
|
||||
* crtc 0 is OVL0 -> COLOR0 -> AAL -> OD -> RDMA0 -> UFOE -> DSI0
|
||||
*/
|
||||
dsi->encoder.possible_crtcs = 1;
|
||||
|
||||
/* If there's a bridge, attach to it and let it create the connector */
|
||||
ret = mtk_drm_attach_bridge(dsi->bridge, &dsi->encoder);
|
||||
if (ret) {
|
||||
/* Otherwise create our own connector and attach to a panel */
|
||||
ret = mtk_dsi_create_connector(drm, dsi);
|
||||
if (ret)
|
||||
goto err_encoder_cleanup;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
err_encoder_cleanup:
|
||||
drm_encoder_cleanup(&dsi->encoder);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void mtk_dsi_destroy_conn_enc(struct mtk_dsi *dsi)
|
||||
{
|
||||
drm_encoder_cleanup(&dsi->encoder);
|
||||
/* Skip connector cleanup if creation was delegated to the bridge */
|
||||
if (dsi->conn.dev) {
|
||||
drm_connector_unregister(&dsi->conn);
|
||||
drm_connector_cleanup(&dsi->conn);
|
||||
}
|
||||
}
|
||||
|
||||
static void mtk_dsi_ddp_start(struct mtk_ddp_comp *comp)
|
||||
{
|
||||
struct mtk_dsi *dsi = container_of(comp, struct mtk_dsi, ddp_comp);
|
||||
|
||||
mtk_dsi_poweron(dsi);
|
||||
}
|
||||
|
||||
static void mtk_dsi_ddp_stop(struct mtk_ddp_comp *comp)
|
||||
{
|
||||
struct mtk_dsi *dsi = container_of(comp, struct mtk_dsi, ddp_comp);
|
||||
|
||||
mtk_dsi_poweroff(dsi);
|
||||
}
|
||||
|
||||
static const struct mtk_ddp_comp_funcs mtk_dsi_funcs = {
|
||||
.start = mtk_dsi_ddp_start,
|
||||
.stop = mtk_dsi_ddp_stop,
|
||||
};
|
||||
|
||||
static int mtk_dsi_host_attach(struct mipi_dsi_host *host,
|
||||
struct mipi_dsi_device *device)
|
||||
{
|
||||
struct mtk_dsi *dsi = host_to_dsi(host);
|
||||
|
||||
dsi->lanes = device->lanes;
|
||||
dsi->format = device->format;
|
||||
dsi->mode_flags = device->mode_flags;
|
||||
|
||||
if (dsi->conn.dev)
|
||||
drm_helper_hpd_irq_event(dsi->conn.dev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mtk_dsi_host_detach(struct mipi_dsi_host *host,
|
||||
struct mipi_dsi_device *device)
|
||||
{
|
||||
struct mtk_dsi *dsi = host_to_dsi(host);
|
||||
|
||||
if (dsi->conn.dev)
|
||||
drm_helper_hpd_irq_event(dsi->conn.dev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct mipi_dsi_host_ops mtk_dsi_ops = {
|
||||
.attach = mtk_dsi_host_attach,
|
||||
.detach = mtk_dsi_host_detach,
|
||||
};
|
||||
|
||||
static int mtk_dsi_bind(struct device *dev, struct device *master, void *data)
|
||||
{
|
||||
int ret;
|
||||
struct drm_device *drm = data;
|
||||
struct mtk_dsi *dsi = dev_get_drvdata(dev);
|
||||
|
||||
ret = mtk_ddp_comp_register(drm, &dsi->ddp_comp);
|
||||
if (ret < 0) {
|
||||
dev_err(dev, "Failed to register component %s: %d\n",
|
||||
dev->of_node->full_name, ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = mipi_dsi_host_register(&dsi->host);
|
||||
if (ret < 0) {
|
||||
dev_err(dev, "failed to register DSI host: %d\n", ret);
|
||||
goto err_ddp_comp_unregister;
|
||||
}
|
||||
|
||||
ret = mtk_dsi_create_conn_enc(drm, dsi);
|
||||
if (ret) {
|
||||
DRM_ERROR("Encoder create failed with %d\n", ret);
|
||||
goto err_unregister;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
err_unregister:
|
||||
mipi_dsi_host_unregister(&dsi->host);
|
||||
err_ddp_comp_unregister:
|
||||
mtk_ddp_comp_unregister(drm, &dsi->ddp_comp);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void mtk_dsi_unbind(struct device *dev, struct device *master,
|
||||
void *data)
|
||||
{
|
||||
struct drm_device *drm = data;
|
||||
struct mtk_dsi *dsi = dev_get_drvdata(dev);
|
||||
|
||||
mtk_dsi_destroy_conn_enc(dsi);
|
||||
mipi_dsi_host_unregister(&dsi->host);
|
||||
mtk_ddp_comp_unregister(drm, &dsi->ddp_comp);
|
||||
}
|
||||
|
||||
static const struct component_ops mtk_dsi_component_ops = {
|
||||
.bind = mtk_dsi_bind,
|
||||
.unbind = mtk_dsi_unbind,
|
||||
};
|
||||
|
||||
static int mtk_dsi_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct mtk_dsi *dsi;
|
||||
struct device *dev = &pdev->dev;
|
||||
struct device_node *remote_node, *endpoint;
|
||||
struct resource *regs;
|
||||
int comp_id;
|
||||
int ret;
|
||||
|
||||
dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
|
||||
if (!dsi)
|
||||
return -ENOMEM;
|
||||
|
||||
dsi->host.ops = &mtk_dsi_ops;
|
||||
dsi->host.dev = dev;
|
||||
|
||||
endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
|
||||
if (endpoint) {
|
||||
remote_node = of_graph_get_remote_port_parent(endpoint);
|
||||
if (!remote_node) {
|
||||
dev_err(dev, "No panel connected\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
dsi->bridge = of_drm_find_bridge(remote_node);
|
||||
dsi->panel = of_drm_find_panel(remote_node);
|
||||
of_node_put(remote_node);
|
||||
if (!dsi->bridge && !dsi->panel) {
|
||||
dev_info(dev, "Waiting for bridge or panel driver\n");
|
||||
return -EPROBE_DEFER;
|
||||
}
|
||||
}
|
||||
|
||||
dsi->engine_clk = devm_clk_get(dev, "engine");
|
||||
if (IS_ERR(dsi->engine_clk)) {
|
||||
ret = PTR_ERR(dsi->engine_clk);
|
||||
dev_err(dev, "Failed to get engine clock: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
dsi->digital_clk = devm_clk_get(dev, "digital");
|
||||
if (IS_ERR(dsi->digital_clk)) {
|
||||
ret = PTR_ERR(dsi->digital_clk);
|
||||
dev_err(dev, "Failed to get digital clock: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
dsi->hs_clk = devm_clk_get(dev, "hs");
|
||||
if (IS_ERR(dsi->hs_clk)) {
|
||||
ret = PTR_ERR(dsi->hs_clk);
|
||||
dev_err(dev, "Failed to get hs clock: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
dsi->regs = devm_ioremap_resource(dev, regs);
|
||||
if (IS_ERR(dsi->regs)) {
|
||||
ret = PTR_ERR(dsi->regs);
|
||||
dev_err(dev, "Failed to ioremap memory: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
dsi->phy = devm_phy_get(dev, "dphy");
|
||||
if (IS_ERR(dsi->phy)) {
|
||||
ret = PTR_ERR(dsi->phy);
|
||||
dev_err(dev, "Failed to get MIPI-DPHY: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DSI);
|
||||
if (comp_id < 0) {
|
||||
dev_err(dev, "Failed to identify by alias: %d\n", comp_id);
|
||||
return comp_id;
|
||||
}
|
||||
|
||||
ret = mtk_ddp_comp_init(dev, dev->of_node, &dsi->ddp_comp, comp_id,
|
||||
&mtk_dsi_funcs);
|
||||
if (ret) {
|
||||
dev_err(dev, "Failed to initialize component: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
platform_set_drvdata(pdev, dsi);
|
||||
|
||||
return component_add(&pdev->dev, &mtk_dsi_component_ops);
|
||||
}
|
||||
|
||||
static int mtk_dsi_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct mtk_dsi *dsi = platform_get_drvdata(pdev);
|
||||
|
||||
mtk_output_dsi_disable(dsi);
|
||||
component_del(&pdev->dev, &mtk_dsi_component_ops);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct of_device_id mtk_dsi_of_match[] = {
|
||||
{ .compatible = "mediatek,mt8173-dsi" },
|
||||
{ },
|
||||
};
|
||||
|
||||
struct platform_driver mtk_dsi_driver = {
|
||||
.probe = mtk_dsi_probe,
|
||||
.remove = mtk_dsi_remove,
|
||||
.driver = {
|
||||
.name = "mtk-dsi",
|
||||
.of_match_table = mtk_dsi_of_match,
|
||||
},
|
||||
};
|
||||
|
|
@ -0,0 +1,463 @@
|
|||
/*
|
||||
* Copyright (c) 2015 MediaTek Inc.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License 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.
|
||||
*/
|
||||
|
||||
#include <linux/clk.h>
|
||||
#include <linux/clk-provider.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/phy/phy.h>
|
||||
|
||||
#define MIPITX_DSI_CON 0x00
|
||||
#define RG_DSI_LDOCORE_EN BIT(0)
|
||||
#define RG_DSI_CKG_LDOOUT_EN BIT(1)
|
||||
#define RG_DSI_BCLK_SEL (3 << 2)
|
||||
#define RG_DSI_LD_IDX_SEL (7 << 4)
|
||||
#define RG_DSI_PHYCLK_SEL (2 << 8)
|
||||
#define RG_DSI_DSICLK_FREQ_SEL BIT(10)
|
||||
#define RG_DSI_LPTX_CLMP_EN BIT(11)
|
||||
|
||||
#define MIPITX_DSI_CLOCK_LANE 0x04
|
||||
#define MIPITX_DSI_DATA_LANE0 0x08
|
||||
#define MIPITX_DSI_DATA_LANE1 0x0c
|
||||
#define MIPITX_DSI_DATA_LANE2 0x10
|
||||
#define MIPITX_DSI_DATA_LANE3 0x14
|
||||
#define RG_DSI_LNTx_LDOOUT_EN BIT(0)
|
||||
#define RG_DSI_LNTx_CKLANE_EN BIT(1)
|
||||
#define RG_DSI_LNTx_LPTX_IPLUS1 BIT(2)
|
||||
#define RG_DSI_LNTx_LPTX_IPLUS2 BIT(3)
|
||||
#define RG_DSI_LNTx_LPTX_IMINUS BIT(4)
|
||||
#define RG_DSI_LNTx_LPCD_IPLUS BIT(5)
|
||||
#define RG_DSI_LNTx_LPCD_IMINUS BIT(6)
|
||||
#define RG_DSI_LNTx_RT_CODE (0xf << 8)
|
||||
|
||||
#define MIPITX_DSI_TOP_CON 0x40
|
||||
#define RG_DSI_LNT_INTR_EN BIT(0)
|
||||
#define RG_DSI_LNT_HS_BIAS_EN BIT(1)
|
||||
#define RG_DSI_LNT_IMP_CAL_EN BIT(2)
|
||||
#define RG_DSI_LNT_TESTMODE_EN BIT(3)
|
||||
#define RG_DSI_LNT_IMP_CAL_CODE (0xf << 4)
|
||||
#define RG_DSI_LNT_AIO_SEL (7 << 8)
|
||||
#define RG_DSI_PAD_TIE_LOW_EN BIT(11)
|
||||
#define RG_DSI_DEBUG_INPUT_EN BIT(12)
|
||||
#define RG_DSI_PRESERVE (7 << 13)
|
||||
|
||||
#define MIPITX_DSI_BG_CON 0x44
|
||||
#define RG_DSI_BG_CORE_EN BIT(0)
|
||||
#define RG_DSI_BG_CKEN BIT(1)
|
||||
#define RG_DSI_BG_DIV (0x3 << 2)
|
||||
#define RG_DSI_BG_FAST_CHARGE BIT(4)
|
||||
#define RG_DSI_VOUT_MSK (0x3ffff << 5)
|
||||
#define RG_DSI_V12_SEL (7 << 5)
|
||||
#define RG_DSI_V10_SEL (7 << 8)
|
||||
#define RG_DSI_V072_SEL (7 << 11)
|
||||
#define RG_DSI_V04_SEL (7 << 14)
|
||||
#define RG_DSI_V032_SEL (7 << 17)
|
||||
#define RG_DSI_V02_SEL (7 << 20)
|
||||
#define RG_DSI_BG_R1_TRIM (0xf << 24)
|
||||
#define RG_DSI_BG_R2_TRIM (0xf << 28)
|
||||
|
||||
#define MIPITX_DSI_PLL_CON0 0x50
|
||||
#define RG_DSI_MPPLL_PLL_EN BIT(0)
|
||||
#define RG_DSI_MPPLL_DIV_MSK (0x1ff << 1)
|
||||
#define RG_DSI_MPPLL_PREDIV (3 << 1)
|
||||
#define RG_DSI_MPPLL_TXDIV0 (3 << 3)
|
||||
#define RG_DSI_MPPLL_TXDIV1 (3 << 5)
|
||||
#define RG_DSI_MPPLL_POSDIV (7 << 7)
|
||||
#define RG_DSI_MPPLL_MONVC_EN BIT(10)
|
||||
#define RG_DSI_MPPLL_MONREF_EN BIT(11)
|
||||
#define RG_DSI_MPPLL_VOD_EN BIT(12)
|
||||
|
||||
#define MIPITX_DSI_PLL_CON1 0x54
|
||||
#define RG_DSI_MPPLL_SDM_FRA_EN BIT(0)
|
||||
#define RG_DSI_MPPLL_SDM_SSC_PH_INIT BIT(1)
|
||||
#define RG_DSI_MPPLL_SDM_SSC_EN BIT(2)
|
||||
#define RG_DSI_MPPLL_SDM_SSC_PRD (0xffff << 16)
|
||||
|
||||
#define MIPITX_DSI_PLL_CON2 0x58
|
||||
|
||||
#define MIPITX_DSI_PLL_PWR 0x68
|
||||
#define RG_DSI_MPPLL_SDM_PWR_ON BIT(0)
|
||||
#define RG_DSI_MPPLL_SDM_ISO_EN BIT(1)
|
||||
#define RG_DSI_MPPLL_SDM_PWR_ACK BIT(8)
|
||||
|
||||
#define MIPITX_DSI_SW_CTRL 0x80
|
||||
#define SW_CTRL_EN BIT(0)
|
||||
|
||||
#define MIPITX_DSI_SW_CTRL_CON0 0x84
|
||||
#define SW_LNTC_LPTX_PRE_OE BIT(0)
|
||||
#define SW_LNTC_LPTX_OE BIT(1)
|
||||
#define SW_LNTC_LPTX_P BIT(2)
|
||||
#define SW_LNTC_LPTX_N BIT(3)
|
||||
#define SW_LNTC_HSTX_PRE_OE BIT(4)
|
||||
#define SW_LNTC_HSTX_OE BIT(5)
|
||||
#define SW_LNTC_HSTX_ZEROCLK BIT(6)
|
||||
#define SW_LNT0_LPTX_PRE_OE BIT(7)
|
||||
#define SW_LNT0_LPTX_OE BIT(8)
|
||||
#define SW_LNT0_LPTX_P BIT(9)
|
||||
#define SW_LNT0_LPTX_N BIT(10)
|
||||
#define SW_LNT0_HSTX_PRE_OE BIT(11)
|
||||
#define SW_LNT0_HSTX_OE BIT(12)
|
||||
#define SW_LNT0_LPRX_EN BIT(13)
|
||||
#define SW_LNT1_LPTX_PRE_OE BIT(14)
|
||||
#define SW_LNT1_LPTX_OE BIT(15)
|
||||
#define SW_LNT1_LPTX_P BIT(16)
|
||||
#define SW_LNT1_LPTX_N BIT(17)
|
||||
#define SW_LNT1_HSTX_PRE_OE BIT(18)
|
||||
#define SW_LNT1_HSTX_OE BIT(19)
|
||||
#define SW_LNT2_LPTX_PRE_OE BIT(20)
|
||||
#define SW_LNT2_LPTX_OE BIT(21)
|
||||
#define SW_LNT2_LPTX_P BIT(22)
|
||||
#define SW_LNT2_LPTX_N BIT(23)
|
||||
#define SW_LNT2_HSTX_PRE_OE BIT(24)
|
||||
#define SW_LNT2_HSTX_OE BIT(25)
|
||||
|
||||
struct mtk_mipi_tx {
|
||||
struct device *dev;
|
||||
void __iomem *regs;
|
||||
unsigned int data_rate;
|
||||
struct clk_hw pll_hw;
|
||||
struct clk *pll;
|
||||
};
|
||||
|
||||
static inline struct mtk_mipi_tx *mtk_mipi_tx_from_clk_hw(struct clk_hw *hw)
|
||||
{
|
||||
return container_of(hw, struct mtk_mipi_tx, pll_hw);
|
||||
}
|
||||
|
||||
static void mtk_mipi_tx_clear_bits(struct mtk_mipi_tx *mipi_tx, u32 offset,
|
||||
u32 bits)
|
||||
{
|
||||
u32 temp = readl(mipi_tx->regs + offset);
|
||||
|
||||
writel(temp & ~bits, mipi_tx->regs + offset);
|
||||
}
|
||||
|
||||
static void mtk_mipi_tx_set_bits(struct mtk_mipi_tx *mipi_tx, u32 offset,
|
||||
u32 bits)
|
||||
{
|
||||
u32 temp = readl(mipi_tx->regs + offset);
|
||||
|
||||
writel(temp | bits, mipi_tx->regs + offset);
|
||||
}
|
||||
|
||||
static void mtk_mipi_tx_update_bits(struct mtk_mipi_tx *mipi_tx, u32 offset,
|
||||
u32 mask, u32 data)
|
||||
{
|
||||
u32 temp = readl(mipi_tx->regs + offset);
|
||||
|
||||
writel((temp & ~mask) | (data & mask), mipi_tx->regs + offset);
|
||||
}
|
||||
|
||||
static int mtk_mipi_tx_pll_prepare(struct clk_hw *hw)
|
||||
{
|
||||
struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
|
||||
unsigned int txdiv, txdiv0, txdiv1;
|
||||
u64 pcw;
|
||||
|
||||
dev_dbg(mipi_tx->dev, "prepare: %u Hz\n", mipi_tx->data_rate);
|
||||
|
||||
if (mipi_tx->data_rate >= 500000000) {
|
||||
txdiv = 1;
|
||||
txdiv0 = 0;
|
||||
txdiv1 = 0;
|
||||
} else if (mipi_tx->data_rate >= 250000000) {
|
||||
txdiv = 2;
|
||||
txdiv0 = 1;
|
||||
txdiv1 = 0;
|
||||
} else if (mipi_tx->data_rate >= 125000000) {
|
||||
txdiv = 4;
|
||||
txdiv0 = 2;
|
||||
txdiv1 = 0;
|
||||
} else if (mipi_tx->data_rate > 62000000) {
|
||||
txdiv = 8;
|
||||
txdiv0 = 2;
|
||||
txdiv1 = 1;
|
||||
} else if (mipi_tx->data_rate >= 50000000) {
|
||||
txdiv = 16;
|
||||
txdiv0 = 2;
|
||||
txdiv1 = 2;
|
||||
} else {
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_BG_CON,
|
||||
RG_DSI_VOUT_MSK |
|
||||
RG_DSI_BG_CKEN | RG_DSI_BG_CORE_EN,
|
||||
(4 << 20) | (4 << 17) | (4 << 14) |
|
||||
(4 << 11) | (4 << 8) | (4 << 5) |
|
||||
RG_DSI_BG_CKEN | RG_DSI_BG_CORE_EN);
|
||||
|
||||
usleep_range(30, 100);
|
||||
|
||||
mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_TOP_CON,
|
||||
RG_DSI_LNT_IMP_CAL_CODE | RG_DSI_LNT_HS_BIAS_EN,
|
||||
(8 << 4) | RG_DSI_LNT_HS_BIAS_EN);
|
||||
|
||||
mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_CON,
|
||||
RG_DSI_CKG_LDOOUT_EN | RG_DSI_LDOCORE_EN);
|
||||
|
||||
mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_PWR,
|
||||
RG_DSI_MPPLL_SDM_PWR_ON |
|
||||
RG_DSI_MPPLL_SDM_ISO_EN,
|
||||
RG_DSI_MPPLL_SDM_PWR_ON);
|
||||
|
||||
mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
|
||||
RG_DSI_MPPLL_PLL_EN);
|
||||
|
||||
mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
|
||||
RG_DSI_MPPLL_TXDIV0 | RG_DSI_MPPLL_TXDIV1 |
|
||||
RG_DSI_MPPLL_PREDIV,
|
||||
(txdiv0 << 3) | (txdiv1 << 5));
|
||||
|
||||
/*
|
||||
* PLL PCW config
|
||||
* PCW bit 24~30 = integer part of pcw
|
||||
* PCW bit 0~23 = fractional part of pcw
|
||||
* pcw = data_Rate*4*txdiv/(Ref_clk*2);
|
||||
* Post DIV =4, so need data_Rate*4
|
||||
* Ref_clk is 26MHz
|
||||
*/
|
||||
pcw = div_u64(((u64)mipi_tx->data_rate * 2 * txdiv) << 24,
|
||||
26000000);
|
||||
writel(pcw, mipi_tx->regs + MIPITX_DSI_PLL_CON2);
|
||||
|
||||
mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_PLL_CON1,
|
||||
RG_DSI_MPPLL_SDM_FRA_EN);
|
||||
|
||||
mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_PLL_CON0, RG_DSI_MPPLL_PLL_EN);
|
||||
|
||||
usleep_range(20, 100);
|
||||
|
||||
mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON1,
|
||||
RG_DSI_MPPLL_SDM_SSC_EN);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void mtk_mipi_tx_pll_unprepare(struct clk_hw *hw)
|
||||
{
|
||||
struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
|
||||
|
||||
dev_dbg(mipi_tx->dev, "unprepare\n");
|
||||
|
||||
mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
|
||||
RG_DSI_MPPLL_PLL_EN);
|
||||
|
||||
mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_PWR,
|
||||
RG_DSI_MPPLL_SDM_ISO_EN |
|
||||
RG_DSI_MPPLL_SDM_PWR_ON,
|
||||
RG_DSI_MPPLL_SDM_ISO_EN);
|
||||
|
||||
mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_TOP_CON,
|
||||
RG_DSI_LNT_HS_BIAS_EN);
|
||||
|
||||
mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_CON,
|
||||
RG_DSI_CKG_LDOOUT_EN | RG_DSI_LDOCORE_EN);
|
||||
|
||||
mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_BG_CON,
|
||||
RG_DSI_BG_CKEN | RG_DSI_BG_CORE_EN);
|
||||
|
||||
mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
|
||||
RG_DSI_MPPLL_DIV_MSK);
|
||||
}
|
||||
|
||||
static long mtk_mipi_tx_pll_round_rate(struct clk_hw *hw, unsigned long rate,
|
||||
unsigned long *prate)
|
||||
{
|
||||
return clamp_val(rate, 50000000, 1250000000);
|
||||
}
|
||||
|
||||
static int mtk_mipi_tx_pll_set_rate(struct clk_hw *hw, unsigned long rate,
|
||||
unsigned long parent_rate)
|
||||
{
|
||||
struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
|
||||
|
||||
dev_dbg(mipi_tx->dev, "set rate: %lu Hz\n", rate);
|
||||
|
||||
mipi_tx->data_rate = rate;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static unsigned long mtk_mipi_tx_pll_recalc_rate(struct clk_hw *hw,
|
||||
unsigned long parent_rate)
|
||||
{
|
||||
struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
|
||||
|
||||
return mipi_tx->data_rate;
|
||||
}
|
||||
|
||||
static const struct clk_ops mtk_mipi_tx_pll_ops = {
|
||||
.prepare = mtk_mipi_tx_pll_prepare,
|
||||
.unprepare = mtk_mipi_tx_pll_unprepare,
|
||||
.round_rate = mtk_mipi_tx_pll_round_rate,
|
||||
.set_rate = mtk_mipi_tx_pll_set_rate,
|
||||
.recalc_rate = mtk_mipi_tx_pll_recalc_rate,
|
||||
};
|
||||
|
||||
static int mtk_mipi_tx_power_on_signal(struct phy *phy)
|
||||
{
|
||||
struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
|
||||
unsigned int reg;
|
||||
|
||||
for (reg = MIPITX_DSI_CLOCK_LANE;
|
||||
reg <= MIPITX_DSI_DATA_LANE3; reg += 4)
|
||||
mtk_mipi_tx_set_bits(mipi_tx, reg, RG_DSI_LNTx_LDOOUT_EN);
|
||||
|
||||
mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_TOP_CON,
|
||||
RG_DSI_PAD_TIE_LOW_EN);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mtk_mipi_tx_power_on(struct phy *phy)
|
||||
{
|
||||
struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
|
||||
int ret;
|
||||
|
||||
/* Power up core and enable PLL */
|
||||
ret = clk_prepare_enable(mipi_tx->pll);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* Enable DSI Lane LDO outputs, disable pad tie low */
|
||||
mtk_mipi_tx_power_on_signal(phy);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void mtk_mipi_tx_power_off_signal(struct phy *phy)
|
||||
{
|
||||
struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
|
||||
unsigned int reg;
|
||||
|
||||
mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_TOP_CON,
|
||||
RG_DSI_PAD_TIE_LOW_EN);
|
||||
|
||||
for (reg = MIPITX_DSI_CLOCK_LANE;
|
||||
reg <= MIPITX_DSI_DATA_LANE3; reg += 4)
|
||||
mtk_mipi_tx_clear_bits(mipi_tx, reg, RG_DSI_LNTx_LDOOUT_EN);
|
||||
}
|
||||
|
||||
static int mtk_mipi_tx_power_off(struct phy *phy)
|
||||
{
|
||||
struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
|
||||
|
||||
/* Enable pad tie low, disable DSI Lane LDO outputs */
|
||||
mtk_mipi_tx_power_off_signal(phy);
|
||||
|
||||
/* Disable PLL and power down core */
|
||||
clk_disable_unprepare(mipi_tx->pll);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct phy_ops mtk_mipi_tx_ops = {
|
||||
.power_on = mtk_mipi_tx_power_on,
|
||||
.power_off = mtk_mipi_tx_power_off,
|
||||
.owner = THIS_MODULE,
|
||||
};
|
||||
|
||||
static int mtk_mipi_tx_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct device *dev = &pdev->dev;
|
||||
struct mtk_mipi_tx *mipi_tx;
|
||||
struct resource *mem;
|
||||
struct clk *ref_clk;
|
||||
const char *ref_clk_name;
|
||||
struct clk_init_data clk_init = {
|
||||
.ops = &mtk_mipi_tx_pll_ops,
|
||||
.num_parents = 1,
|
||||
.parent_names = (const char * const *)&ref_clk_name,
|
||||
.flags = CLK_SET_RATE_GATE,
|
||||
};
|
||||
struct phy *phy;
|
||||
struct phy_provider *phy_provider;
|
||||
int ret;
|
||||
|
||||
mipi_tx = devm_kzalloc(dev, sizeof(*mipi_tx), GFP_KERNEL);
|
||||
if (!mipi_tx)
|
||||
return -ENOMEM;
|
||||
|
||||
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
mipi_tx->regs = devm_ioremap_resource(dev, mem);
|
||||
if (IS_ERR(mipi_tx->regs)) {
|
||||
ret = PTR_ERR(mipi_tx->regs);
|
||||
dev_err(dev, "Failed to get memory resource: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
ref_clk = devm_clk_get(dev, NULL);
|
||||
if (IS_ERR(ref_clk)) {
|
||||
ret = PTR_ERR(ref_clk);
|
||||
dev_err(dev, "Failed to get reference clock: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
ref_clk_name = __clk_get_name(ref_clk);
|
||||
|
||||
ret = of_property_read_string(dev->of_node, "clock-output-names",
|
||||
&clk_init.name);
|
||||
if (ret < 0) {
|
||||
dev_err(dev, "Failed to read clock-output-names: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
mipi_tx->pll_hw.init = &clk_init;
|
||||
mipi_tx->pll = devm_clk_register(dev, &mipi_tx->pll_hw);
|
||||
if (IS_ERR(mipi_tx->pll)) {
|
||||
ret = PTR_ERR(mipi_tx->pll);
|
||||
dev_err(dev, "Failed to register PLL: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
phy = devm_phy_create(dev, NULL, &mtk_mipi_tx_ops);
|
||||
if (IS_ERR(phy)) {
|
||||
ret = PTR_ERR(phy);
|
||||
dev_err(dev, "Failed to create MIPI D-PHY: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
phy_set_drvdata(phy, mipi_tx);
|
||||
|
||||
phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
|
||||
if (IS_ERR(phy)) {
|
||||
ret = PTR_ERR(phy_provider);
|
||||
return ret;
|
||||
}
|
||||
|
||||
mipi_tx->dev = dev;
|
||||
|
||||
return of_clk_add_provider(dev->of_node, of_clk_src_simple_get,
|
||||
mipi_tx->pll);
|
||||
}
|
||||
|
||||
static int mtk_mipi_tx_remove(struct platform_device *pdev)
|
||||
{
|
||||
of_clk_del_provider(pdev->dev.of_node);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct of_device_id mtk_mipi_tx_match[] = {
|
||||
{ .compatible = "mediatek,mt8173-mipi-tx", },
|
||||
{},
|
||||
};
|
||||
|
||||
struct platform_driver mtk_mipi_tx_driver = {
|
||||
.probe = mtk_mipi_tx_probe,
|
||||
.remove = mtk_mipi_tx_remove,
|
||||
.driver = {
|
||||
.name = "mediatek-mipi-tx",
|
||||
.of_match_table = mtk_mipi_tx_match,
|
||||
},
|
||||
};
|
||||
Loading…
Reference in New Issue