Add dsi encoder driver for hi6220 SoC.
Signed-off-by: Xinliang Liu <xinliang.liu at linaro.org>
Signed-off-by: Xinwei Kong <kong.kongxinwei at hisilicon.com>
Signed-off-by: Andy Green <andy.green at linaro.org>
---
drivers/gpu/drm/hisilicon/Kconfig | 1 +
drivers/gpu/drm/hisilicon/Makefile | 3 +-
drivers/gpu/drm/hisilicon/hisi_drm_dsi.c | 728 +++++++++++++++++++++++++++++++
drivers/gpu/drm/hisilicon/hisi_dsi_reg.h | 89 ++++
4 files changed, 820 insertions(+), 1 deletion(-)
create mode 100644 drivers/gpu/drm/hisilicon/hisi_drm_dsi.c
create mode 100644 drivers/gpu/drm/hisilicon/hisi_dsi_reg.h
diff --git a/drivers/gpu/drm/hisilicon/Kconfig
b/drivers/gpu/drm/hisilicon/Kconfig
index 70aa8d1..f1c33c2 100644
--- a/drivers/gpu/drm/hisilicon/Kconfig
+++ b/drivers/gpu/drm/hisilicon/Kconfig
@@ -4,6 +4,7 @@ config DRM_HISI
select DRM_KMS_HELPER
select DRM_GEM_CMA_HELPER
select DRM_KMS_CMA_HELPER
+ select DRM_MIPI_DSI
help
Choose this option if you have a hisilicon chipsets(hi6220).
If M is selected the module will be called hisi-drm.
diff --git a/drivers/gpu/drm/hisilicon/Makefile
b/drivers/gpu/drm/hisilicon/Makefile
index 3433c8b..5083c1f 100644
--- a/drivers/gpu/drm/hisilicon/Makefile
+++ b/drivers/gpu/drm/hisilicon/Makefile
@@ -1,4 +1,5 @@
hisi-drm-y := hisi_drm_drv.o \
- hisi_drm_ade.o
+ hisi_drm_ade.o \
+ hisi_drm_dsi.o
obj-$(CONFIG_DRM_HISI) += hisi-drm.o
diff --git a/drivers/gpu/drm/hisilicon/hisi_drm_dsi.c
b/drivers/gpu/drm/hisilicon/hisi_drm_dsi.c
new file mode 100644
index 0000000..7a6cf66
--- /dev/null
+++ b/drivers/gpu/drm/hisilicon/hisi_drm_dsi.c
@@ -0,0 +1,728 @@
+/*
+ * Hisilicon hi6220 SoC dsi driver
+ *
+ * Copyright (c) 2014-2015 Hisilicon Limited.
+ * Author:
+ * Xinliang Liu <xinliang.liu at linaro.org>
+ * Xinliang Liu <z.liuxinliang at hisilicon.com>
+ * Xinwei Kong <kong.kongxinwei at hisilicon.com>
+ *
+ * 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.
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/component.h>
+#include <linux/of_graph.h>
+
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_encoder_slave.h>
+#include <drm/drm_atomic_helper.h>
+
+#include "hisi_dsi_reg.h"
+
+#define MAX_TX_ESC_CLK (10)
+#define ROUND(x, y) ((x) / (y) + ((x) % (y) * 10 / (y) >= 5 ? 1 : 0))
+#define DEFAULT_MIPI_CLK_RATE 19200000
+#define DEFAULT_MIPI_CLK_PERIOD_PS (1000000000 / (DEFAULT_MIPI_CLK_RATE /
1000))
+#define R(x) ((u32)((((u64)(x) * (u64)1000 * (u64)mode->clock) / \
+ phy->lane_byte_clk_kHz)))
+
+#define encoder_to_dsi(encoder) \
+ container_of(encoder, struct hisi_dsi, encoder)
+#define host_to_dsi(host) \
+ container_of(host, struct hisi_dsi, host)
+
+struct mipi_phy_register {
+ u32 clk_t_lpx;
+ u32 clk_t_hs_prepare;
+ u32 clk_t_hs_zero;
+ u32 clk_t_hs_trial;
+ u32 clk_t_wakeup;
+ u32 data_t_lpx;
+ u32 data_t_hs_prepare;
+ u32 data_t_hs_zero;
+ u32 data_t_hs_trial;
+ u32 data_t_ta_go;
+ u32 data_t_ta_get;
+ u32 data_t_wakeup;
+ u32 hstx_ckg_sel;
+ u32 pll_fbd_div5f;
+ u32 pll_fbd_div1f;
+ u32 pll_fbd_2p;
+ u32 pll_enbwt;
+ u32 pll_fbd_p;
+ u32 pll_fbd_s;
+ u32 pll_pre_div1p;
+ u32 pll_pre_p;
+ u32 pll_vco_750M;
+ u32 pll_lpf_rs;
+ u32 pll_lpf_cs;
+ u32 clklp2hs_time;
+ u32 clkhs2lp_time;
+ u32 lp2hs_time;
+ u32 hs2lp_time;
+ u32 clk_to_data_delay;
+ u32 data_to_clk_delay;
+ u32 lane_byte_clk_kHz;
+ u32 clk_division;
+};
+
+struct dsi_hw_ctx {
+ void __iomem *base;
+ struct clk *dsi_cfg_clk;
+};
+
+struct hisi_dsi {
+ struct drm_encoder encoder;
+ struct drm_display_mode cur_mode;
+ struct dsi_hw_ctx *ctx;
+ struct mipi_phy_register phy;
+
+ u32 lanes;
+ enum mipi_dsi_pixel_format format;
+ unsigned long mode_flags;
+ bool enable;
+};
+
+struct dsi_data {
+ struct hisi_dsi dsi;
+ struct dsi_hw_ctx ctx;
+};
+
+struct dsi_phy_seq_info {
+ u32 min_range_kHz;
+ u32 max_range_kHz;
+ u32 pll_vco_750M;
+ u32 hstx_ckg_sel;
+};
+
+static const struct dsi_phy_seq_info dphy_seq_info[] = {
+ { 46000, 62000, 1, 7 },
+ { 62000, 93000, 0, 7 },
+ { 93000, 125000, 1, 6 },
+ { 125000, 187000, 0, 6 },
+ { 187000, 250000, 1, 5 },
+ { 250000, 375000, 0, 5 },
+ { 375000, 500000, 1, 4 },
+ { 500000, 750000, 0, 4 },
+ { 750000, 1000000, 1, 0 },
+ { 1000000, 1500000, 0, 0 }
+};
+
+static void set_dsi_phy_rate_equal_or_faster(u32 phy_freq_kHz,
+ struct mipi_phy_register *phy)
+{
+ u32 ui = 0;
+ u32 cfg_clk_ps = DEFAULT_MIPI_CLK_PERIOD_PS;
+ u32 i = 0;
+ u32 q_pll = 1;
+ u32 m_pll = 0;
+ u32 n_pll = 0;
+ u32 r_pll = 1;
+ u32 m_n = 0;
+ u32 m_n_int = 0;
+ u64 f_kHz;
+ u64 temp;
+ u64 tmp_kHz = phy_freq_kHz;
+
+ do {
+ f_kHz = tmp_kHz;
+
+ /* Find the PLL clock range from the table */
+ for (i = 0; i < ARRAY_SIZE(dphy_seq_info); i++)
+ if (f_kHz > dphy_seq_info[i].min_range_kHz &&
+ f_kHz <= dphy_seq_info[i].max_range_kHz)
+ break;
+
+ if (i == ARRAY_SIZE(dphy_seq_info)) {
+ DRM_ERROR("%lldkHz out of range\n", f_kHz);
+ return;
+ }
+
+ phy->pll_vco_750M = dphy_seq_info[i].pll_vco_750M;
+ phy->hstx_ckg_sel = dphy_seq_info[i].hstx_ckg_sel;
+
+ if (phy->hstx_ckg_sel <= 7 &&
+ phy->hstx_ckg_sel >= 4)
+ q_pll = 0x10 >> (7 - phy->hstx_ckg_sel);
+
+ temp = f_kHz * (u64)q_pll * (u64)cfg_clk_ps;
+ m_n_int = temp / (u64)1000000000;
+ m_n = (temp % (u64)1000000000) / (u64)100000000;
+
+ if (m_n_int % 2 == 0) {
+ if (m_n * 6 >= 50) {
+ n_pll = 2;
+ m_pll = (m_n_int + 1) * n_pll;
+ } else if (m_n * 6 >= 30) {
+ n_pll = 3;
+ m_pll = m_n_int * n_pll + 2;
+ } else {
+ n_pll = 1;
+ m_pll = m_n_int * n_pll;
+ }
+ } else {
+ if (m_n * 6 >= 50) {
+ n_pll = 1;
+ m_pll = (m_n_int + 1) * n_pll;
+ } else if (m_n * 6 >= 30) {
+ n_pll = 1;
+ m_pll = (m_n_int + 1) * n_pll;
+ } else if (m_n * 6 >= 10) {
+ n_pll = 3;
+ m_pll = m_n_int * n_pll + 1;
+ } else {
+ n_pll = 2;
+ m_pll = m_n_int * n_pll;
+ }
+ }
+
+ if (n_pll == 1) {
+ phy->pll_fbd_p = 0;
+ phy->pll_pre_div1p = 1;
+ } else {
+ phy->pll_fbd_p = n_pll;
+ phy->pll_pre_div1p = 0;
+ }
+
+ if (phy->pll_fbd_2p <= 7 && phy->pll_fbd_2p >= 4)
+ r_pll = 0x10 >> (7 - phy->pll_fbd_2p);
+
+ if (m_pll == 2) {
+ phy->pll_pre_p = 0;
+ phy->pll_fbd_s = 0;
+ phy->pll_fbd_div1f = 0;
+ phy->pll_fbd_div5f = 1;
+ } else if (m_pll >= 2 * 2 * r_pll && m_pll <= 2 * 4 * r_pll) {
+ phy->pll_pre_p = m_pll / (2 * r_pll);
+ phy->pll_fbd_s = 0;
+ phy->pll_fbd_div1f = 1;
+ phy->pll_fbd_div5f = 0;
+ } else if (m_pll >= 2 * 5 * r_pll && m_pll <= 2 * 150 * r_pll) {
+ if (((m_pll / (2 * r_pll)) % 2) == 0) {
+ phy->pll_pre_p =
+ (m_pll / (2 * r_pll)) / 2 - 1;
+ phy->pll_fbd_s =
+ (m_pll / (2 * r_pll)) % 2 + 2;
+ } else {
+ phy->pll_pre_p =
+ (m_pll / (2 * r_pll)) / 2;
+ phy->pll_fbd_s =
+ (m_pll / (2 * r_pll)) % 2;
+ }
+ phy->pll_fbd_div1f = 0;
+ phy->pll_fbd_div5f = 0;
+ } else {
+ phy->pll_pre_p = 0;
+ phy->pll_fbd_s = 0;
+ phy->pll_fbd_div1f = 0;
+ phy->pll_fbd_div5f = 1;
+ }
+
+ f_kHz = (u64)1000000000 * (u64)m_pll /
+ ((u64)cfg_clk_ps * (u64)n_pll * (u64)q_pll);
+
+ if (f_kHz >= phy_freq_kHz)
+ break;
+
+ tmp_kHz += 10;
+
+ } while (1);
+
+ ui = 1000000 / f_kHz;
+
+ phy->clk_t_lpx = ROUND(50, 8 * ui);
+ phy->clk_t_hs_prepare = ROUND(133, 16 * ui) - 1;
+
+ phy->clk_t_hs_zero = ROUND(262, 8 * ui);
+ phy->clk_t_hs_trial = 2 * (ROUND(60, 8 * ui) - 1);
+ phy->clk_t_wakeup = ROUND(1000000, (cfg_clk_ps / 1000) - 1);
+ if (phy->clk_t_wakeup > 0xff)
+ phy->clk_t_wakeup = 0xff;
+ phy->data_t_wakeup = phy->clk_t_wakeup;
+ phy->data_t_lpx = phy->clk_t_lpx;
+ phy->data_t_hs_prepare = ROUND(125 + 10 * ui, 16 * ui) - 1;
+ phy->data_t_hs_zero = ROUND(105 + 6 * ui, 8 * ui);
+ phy->data_t_hs_trial = 2 * (ROUND(60 + 4 * ui, 8 * ui) - 1);
+ phy->data_t_ta_go = 3;
+ phy->data_t_ta_get = 4;
+
+ phy->pll_enbwt = 1;
+ phy->clklp2hs_time = ROUND(407, 8 * ui) + 12;
+ phy->clkhs2lp_time = ROUND(105 + 12 * ui, 8 * ui);
+ phy->lp2hs_time = ROUND(240 + 12 * ui, 8 * ui) + 1;
+ phy->hs2lp_time = phy->clkhs2lp_time;
+ phy->clk_to_data_delay = 1 + phy->clklp2hs_time;
+ phy->data_to_clk_delay = ROUND(60 + 52 * ui, 8 * ui) +
+ phy->clkhs2lp_time;
+
+ phy->lane_byte_clk_kHz = f_kHz / 8;
+ phy->clk_division = phy->lane_byte_clk_kHz / MAX_TX_ESC_CLK;
+ if (phy->lane_byte_clk_kHz % MAX_TX_ESC_CLK)
+ phy->clk_division++;
+}
+
+static u32 dsi_get_dpi_color_coding(enum mipi_dsi_pixel_format format)
+{
+ u32 val;
+
+ /* TODO: only support RGB888 now, to support more */
+ switch (format) {
+ case MIPI_DSI_FMT_RGB888:
+ val = DSI_24BITS_1;
+ break;
+ default:
+ val = DSI_24BITS_1;
+ break;
+ }
+
+ return val;
+}
+
+static void dsi_mipi_phy_clks(void __iomem *base,
+ struct mipi_phy_register *phy,
+ u32 lanes)
+{
+ u32 delay_count;
+ bool is_ready;
+ u32 val;
+ u32 i;
+
+ /* set lanes value */
+ val = (lanes - 1) | (PHY_STOP_WAIT_TIME << 8);
+ writel(val, base + PHY_IF_CFG);
+
+ /* set phy clk division */
+ val = readl(base + CLKMGR_CFG) | phy->clk_division;
+ writel(val, base + CLKMGR_CFG);
+
+ /* clean up phy set param */
+ writel(0, base + PHY_RSTZ);
+ writel(0, base + PHY_TST_CTRL0);
+ writel(1, base + PHY_TST_CTRL0);
+ writel(0, base + PHY_TST_CTRL0);
+
+ /* clock lane Timing control - TLPX */
+ dsi_phy_tst_set(base, 0x10010, phy->clk_t_lpx);
+
+ /* clock lane Timing control - THS-PREPARE */
+ dsi_phy_tst_set(base, 0x10011, phy->clk_t_hs_prepare);
+
+ /* clock lane Timing control - THS-ZERO */
+ dsi_phy_tst_set(base, 0x10012, phy->clk_t_hs_zero);
+
+ /* clock lane Timing control - THS-TRAIL */
+ dsi_phy_tst_set(base, 0x10013, phy->clk_t_hs_trial);
+
+ /* clock lane Timing control - TWAKEUP */
+ dsi_phy_tst_set(base, 0x10014, phy->clk_t_wakeup);
+
+ /* data lane */
+ for (i = 0; i < lanes; i++) {
+ /* Timing control - TLPX*/
+ dsi_phy_tst_set(base, 0x10020 + (i << 4), phy->data_t_lpx);
+
+ /* Timing control - THS-PREPARE */
+ dsi_phy_tst_set(base, 0x10021 + (i << 4),
+ phy->data_t_hs_prepare);
+
+ /* Timing control - THS-ZERO */
+ dsi_phy_tst_set(base, 0x10022 + (i << 4), phy->data_t_hs_zero);
+
+ /* Timing control - THS-TRAIL */
+ dsi_phy_tst_set(base, 0x10023 + (i << 4), phy->data_t_hs_trial);
+
+ /* Timing control - TTA-GO */
+ dsi_phy_tst_set(base, 0x10024 + (i << 4), phy->data_t_ta_go);
+
+ /* Timing control - TTA-GET */
+ dsi_phy_tst_set(base, 0x10025 + (i << 4), phy->data_t_ta_get);
+
+ /* Timing control - TWAKEUP */
+ dsi_phy_tst_set(base, 0x10026 + (i << 4), phy->data_t_wakeup);
+ }
+
+ /* physical configuration I */
+ dsi_phy_tst_set(base, 0x10060, phy->hstx_ckg_sel);
+
+ /* physical configuration pll II */
+ val = (phy->pll_fbd_div5f << 5) + (phy->pll_fbd_div1f << 4) +
+ (phy->pll_fbd_2p << 1) + phy->pll_enbwt;
+ dsi_phy_tst_set(base, 0x10063, val);
+
+ /* physical configuration pll II */
+ dsi_phy_tst_set(base, 0x10064, phy->pll_fbd_p);
+
+ /* physical configuration pll III */
+ dsi_phy_tst_set(base, 0x10065, phy->pll_fbd_s);
+
+ /*physical configuration pll IV*/
+ val = (phy->pll_pre_div1p << 7) + phy->pll_pre_p;
+ dsi_phy_tst_set(base, 0x10066, val);
+
+ /*physical configuration pll V*/
+ val = (phy->pll_vco_750M << 4) + (phy->pll_lpf_rs << 2) +
+ phy->pll_lpf_cs + BIT(5);
+ dsi_phy_tst_set(base, 0x10067, val);
+
+ writel(BIT(2), base + PHY_RSTZ);
+ udelay(1);
+ writel(BIT(2) | BIT(0), base + PHY_RSTZ);
+ udelay(1);
+ writel(BIT(2) | BIT(1) | BIT(0), base + PHY_RSTZ);
+ usleep_range(1000, 1500);
+
+ /* wait for phy's clock ready */
+ delay_count = 0;
+ is_ready = false;
+ while (1) {
+ val = readl(base + PHY_STATUS);
+ if (((BIT(0) | BIT(2)) & val) || delay_count > 100) {
+ is_ready = (delay_count < 100) ? true : false;
+ delay_count = 0;
+ break;
+ }
+
+ udelay(1);
+ ++delay_count;
+ }
+
+ if (!is_ready)
+ DRM_INFO("phylock and phystopstateclklane is not ready.\n");
+}
+
+static void dsi_set_mode_timing(void __iomem *base,
+ struct mipi_phy_register *phy,
+ struct drm_display_mode *mode,
+ enum mipi_dsi_pixel_format format)
+{
+ u32 hfp, hbp, hsw, vfp, vbp, vsw;
+ u32 hline_time;
+ u32 hsa_time;
+ u32 hbp_time;
+ u32 pixel_clk_kHz;
+ int htot, vtot;
+ u32 val;
+
+ /* DSI color coding setting */
+ val = dsi_get_dpi_color_coding(format);
+ writel(val, base + DPI_COLOR_CODING);
+
+ /* DSI format and pol setting */
+ val = (mode->flags & DRM_MODE_FLAG_NHSYNC ? 1 : 0) << 2;
+ val |= (mode->flags & DRM_MODE_FLAG_NVSYNC ? 1 : 0) << 1;
+ writel(val, base + DPI_CFG_POL);
+
+ /*
+ * The DSI IP accepts vertical timing using lines as normal,
+ * but horizontal timing is a mixture of pixel-clocks for the
+ * active region and byte-lane clocks for the blanking-related
+ * timings. hfp is specified as the total hline_time in byte-
+ * lane clocks minus hsa, hbp and active.
+ */
+ pixel_clk_kHz = mode->clock;
+ htot = mode->htotal;
+ vtot = mode->vtotal;
+ hfp = mode->hsync_start - mode->hdisplay;
+ hbp = mode->htotal - mode->hsync_end;
+ hsw = mode->hsync_end - mode->hsync_start;
+ vfp = mode->vsync_start - mode->vdisplay;
+ vbp = mode->vtotal - mode->vsync_end;
+ vsw = mode->vsync_end - mode->vsync_start;
+ if (vsw > 15) {
+ DRM_INFO("vsw exceeded 15\n");
+ vtot -= vsw - 15;
+ vsw = 15;
+ }
+
+ hsa_time = (hsw * phy->lane_byte_clk_kHz) / pixel_clk_kHz;
+ hbp_time = (hbp * phy->lane_byte_clk_kHz) / pixel_clk_kHz;
+ hline_time = (((u64)htot * (u64)phy->lane_byte_clk_kHz)) /
+ pixel_clk_kHz;
+
+ if ((R(hline_time) / 1000) > htot) {
+ DRM_INFO("--: hline_time=%d\n", hline_time);
+ hline_time--;
+ }
+
+ if ((R(hline_time) / 1000) < htot) {
+ DRM_INFO("++: hline_time=%d\n", hline_time);
+ hline_time++;
+ }
+
+ /* all specified in byte-lane clocks */
+ writel(hsa_time, base + VID_HSA_TIME);
+ writel(hbp_time, base + VID_HBP_TIME);
+ writel(hline_time, base + VID_HLINE_TIME);
+
+ writel(vsw, base + VID_VSA_LINES);
+ writel(vbp, base + VID_VBP_LINES);
+ writel(vfp, base + VID_VFP_LINES);
+ writel(mode->vdisplay, base + VID_VACTIVE_LINES);
+ writel(mode->hdisplay, base + VID_PKT_SIZE);
+}
+
+static void dsi_set_video_mode_type(void __iomem *base,
+ struct mipi_phy_register *phy,
+ unsigned long flags)
+{
+ u32 val;
+ u32 mode_mask = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
+ MIPI_DSI_MODE_VIDEO_SYNC_PULSE;
+ u32 non_burst_sync_pulse = MIPI_DSI_MODE_VIDEO |
+ MIPI_DSI_MODE_VIDEO_SYNC_PULSE;
+ u32 non_burst_sync_event = MIPI_DSI_MODE_VIDEO;
+
+ /*
+ * choose video type
+ */
+ if ((flags & mode_mask) == non_burst_sync_pulse)
+ val = DSI_NON_BURST_SYNC_PULSES;
+ else if ((flags & mode_mask) == non_burst_sync_event)
+ val = DSI_NON_BURST_SYNC_EVENTS;
+ else
+ val = DSI_BURST_SYNC_PULSES_1;
+
+ writel(val, base + VID_MODE_CFG);
+ /* TODO: to support LCD panel need to set LP command transfer */
+}
+
+static void dsi_mipi_init(struct hisi_dsi *dsi)
+{
+ struct dsi_hw_ctx *ctx = dsi->ctx;
+ struct mipi_phy_register *phy = &dsi->phy;
+ struct drm_display_mode *mode = &dsi->cur_mode;
+ void __iomem *base = ctx->base;
+ u32 dphy_freq_kHz;
+
+ /* count phy params */
+ dphy_freq_kHz = mode->clock * 24 / dsi->lanes;
+ set_dsi_phy_rate_equal_or_faster(dphy_freq_kHz, phy);
+
+ /* reset Core */
+ writel(0, base + PWR_UP);
+
+ /* set phy clocks */
+ dsi_mipi_phy_clks(base, phy, dsi->lanes);
+
+ /* set dsi mode */
+ dsi_set_mode_timing(base, phy, mode, dsi->format);
+
+ /* set video mode type and low power */
+ dsi_set_video_mode_type(base, phy, dsi->mode_flags);
+
+ /* DSI and D-PHY Initialization */
+ writel(DSI_VIDEO_MODE, base + MODE_CFG);
+ writel(BIT(0), base + LPCLK_CTRL);
+ writel(BIT(0), base + PWR_UP);
+}
+
+static void dsi_encoder_disable(struct drm_encoder *encoder)
+{
+ struct hisi_dsi *dsi = encoder_to_dsi(encoder);
+ struct dsi_hw_ctx *ctx = dsi->ctx;
+ void __iomem *base = ctx->base;
+
+ DRM_DEBUG_DRIVER("enter\n");
+ if (!dsi->enable)
+ return;
+
+ writel(0, base + PWR_UP);
+ writel(0, base + LPCLK_CTRL);
+ writel(0, base + PHY_RSTZ);
+ clk_disable_unprepare(ctx->dsi_cfg_clk);
+
+ dsi->enable = false;
+ DRM_DEBUG_DRIVER("exit success.\n");
+}
+
+static void dsi_encoder_enable(struct drm_encoder *encoder)
+{
+ struct hisi_dsi *dsi = encoder_to_dsi(encoder);
+ struct dsi_hw_ctx *ctx = dsi->ctx;
+ int ret;
+
+ DRM_DEBUG_DRIVER("enter.\n");
+ if (dsi->enable)
+ return;
+
+ /* mipi dphy clock enable */
+ ret = clk_prepare_enable(ctx->dsi_cfg_clk);
+ if (ret) {
+ DRM_ERROR("fail to enable dsi_cfg_clk: %d\n", ret);
+ return;
+ }
+
+ dsi_mipi_init(dsi);
+
+ dsi->enable = true;
+ DRM_DEBUG_DRIVER("exit success.\n");
+}
+
+static void dsi_encoder_mode_set(struct drm_encoder *encoder,
+ struct drm_display_mode *mode,
+ struct drm_display_mode *adj_mode)
+{
+ struct hisi_dsi *dsi = encoder_to_dsi(encoder);
+
+ DRM_DEBUG_DRIVER("enter.\n");
+ drm_mode_copy(&dsi->cur_mode, adj_mode);
+ DRM_DEBUG_DRIVER("exit success.\n");
+}
+
+static int dsi_encoder_atomic_check(struct drm_encoder *encoder,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ struct drm_display_mode *mode = &crtc_state->mode;
+
+ DRM_DEBUG_DRIVER("enter.\n");
+ if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
+ DRM_ERROR("not support INTERLACE mode\n");
+ return MODE_NO_INTERLACE;
+ }
+
+ /* pixel clock support range is (1190494208/64, 1190494208)Hz */
+ if (mode->clock < 18602 || mode->clock > 1190494) {
+ DRM_ERROR("mode clock not support\n");
+ return MODE_CLOCK_RANGE;
+ }
+
+ DRM_DEBUG_DRIVER("exit success.\n");
+ return 0;
+}
+
+static const struct drm_encoder_helper_funcs hisi_encoder_helper_funcs = {
+ .atomic_check = dsi_encoder_atomic_check,
+ .mode_set = dsi_encoder_mode_set,
+ .enable = dsi_encoder_enable,
+ .disable = dsi_encoder_disable
+};
+
+static const struct drm_encoder_funcs hisi_encoder_funcs = {
+ .destroy = drm_encoder_cleanup,
+};
+
+static int hisi_drm_encoder_init(struct drm_device *dev,
+ struct drm_encoder *encoder)
+{
+ int ret;
+
+ encoder->possible_crtcs = 1;
+ ret = drm_encoder_init(dev, encoder, &hisi_encoder_funcs,
+ DRM_MODE_ENCODER_TMDS);
+ if (ret) {
+ DRM_ERROR("failed to init dsi encoder\n");
+ return ret;
+ }
+
+ drm_encoder_helper_add(encoder, &hisi_encoder_helper_funcs);
+
+ return 0;
+}
+
+static int dsi_bind(struct device *dev, struct device *master, void *data)
+{
+ struct dsi_data *ddata = dev_get_drvdata(dev);
+ struct hisi_dsi *dsi = &ddata->dsi;
+ struct drm_device *drm_dev = data;
+ int ret;
+
+ ret = hisi_drm_encoder_init(drm_dev, &dsi->encoder);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static void dsi_unbind(struct device *dev, struct device *master, void *data)
+{
+ /* do nothing */
+}
+
+static const struct component_ops dsi_ops = {
+ .bind = dsi_bind,
+ .unbind = dsi_unbind,
+};
+
+static int dsi_parse_dt(struct platform_device *pdev, struct hisi_dsi *dsi)
+{
+ struct dsi_hw_ctx *ctx = dsi->ctx;
+ struct resource *res;
+
+
+ ctx->dsi_cfg_clk = devm_clk_get(&pdev->dev, "pclk_dsi");
+ if (IS_ERR(ctx->dsi_cfg_clk)) {
+ DRM_ERROR("failed to get dsi plck clock\n");
+ return PTR_ERR(ctx->dsi_cfg_clk);
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ ctx->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(ctx->base)) {
+ DRM_ERROR("failed to remap dsi io region\n");
+ return PTR_ERR(ctx->base);
+ }
+
+ return 0;
+}
+
+static int dsi_probe(struct platform_device *pdev)
+{
+ struct dsi_data *data;
+ struct hisi_dsi *dsi;
+ struct dsi_hw_ctx *ctx;
+ int ret;
+
+ data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+ if (!data) {
+ DRM_ERROR("failed to allocate dsi data.\n");
+ return -ENOMEM;
+ }
+ dsi = &data->dsi;
+ ctx = &data->ctx;
+ dsi->ctx = ctx;
+
+ ret = dsi_parse_dt(pdev, dsi);
+ if (ret)
+ return ret;
+
+ platform_set_drvdata(pdev, data);
+
+ return component_add(&pdev->dev, &dsi_ops);
+}
+
+static int dsi_remove(struct platform_device *pdev)
+{
+ component_del(&pdev->dev, &dsi_ops);
+
+ return 0;
+}
+
+static const struct of_device_id dsi_of_match[] = {
+ {.compatible = "hisilicon,hi6220-dsi"},
+ { }
+};
+MODULE_DEVICE_TABLE(of, dsi_of_match);
+
+static struct platform_driver dsi_driver = {
+ .probe = dsi_probe,
+ .remove = dsi_remove,
+ .driver = {
+ .name = "hisi-dsi",
+ .owner = THIS_MODULE,
+ .of_match_table = dsi_of_match,
+ },
+};
+
+module_platform_driver(dsi_driver);
+
+MODULE_AUTHOR("Xinliang Liu <xinliang.liu at linaro.org>");
+MODULE_AUTHOR("Xinliang Liu <z.liuxinliang at hisilicon.com>");
+MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei at hisilicon.com>");
+MODULE_DESCRIPTION("hisilicon hi6220 SoC dsi driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/hisilicon/hisi_dsi_reg.h
b/drivers/gpu/drm/hisilicon/hisi_dsi_reg.h
new file mode 100644
index 0000000..db8f9df
--- /dev/null
+++ b/drivers/gpu/drm/hisilicon/hisi_dsi_reg.h
@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2014-2015 Hisilicon Limited.
+ *
+ * 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.
+ *
+ */
+
+#ifndef __HISI_DSI_REG_H__
+#define __HISI_DSI_REG_H__
+
+/*
+ * regs
+ */
+#define PWR_UP (0x4) /* Core power-up */
+#define PHY_IF_CFG (0xA4) /* D-PHY interface configuration */
+#define CLKMGR_CFG (0x8) /* the internal clock dividers */
+#define PHY_RSTZ (0xA0) /* D-PHY reset control */
+#define PHY_TST_CTRL0 (0xB4) /* D-PHY test interface control 0 */
+#define PHY_TST_CTRL1 (0xB8) /* D-PHY test interface control 1 */
+#define DPI_VCID (0xC) /* DPI virtual channel id */
+#define DPI_COLOR_CODING (0x10) /* DPI color coding */
+#define DPI_CFG_POL (0x14) /* DPI polarity configuration */
+#define VID_HSA_TIME (0x48) /* Horizontal Sync Active time */
+#define VID_HBP_TIME (0x4C) /* Horizontal Back Porch time */
+#define VID_HLINE_TIME (0x50) /* Line time */
+#define VID_VSA_LINES (0x54) /* Vertical Sync Active period */
+#define VID_VBP_LINES (0x58) /* Vertical Back Porch period */
+#define VID_VFP_LINES (0x5C) /* Vertical Front Porch period */
+#define VID_VACTIVE_LINES (0x60) /* Vertical resolution */
+#define VID_PKT_SIZE (0x3C) /* Video packet size */
+#define VID_MODE_CFG (0x38) /* Video mode configuration */
+#define DPI_LP_CMD_TIM (0x18) /* Low-power command timing config */
+#define PHY_TMR_CFG (0x9C) /* Data lanes timing configuration */
+#define BTA_TO_CNT (0x8C) /* Response timeout definition */
+#define PHY_TMR_LPCLK_CFG (0x98) /* clock lane timing configuration */
+#define CLK_DATA_TMR_CFG (0xCC)
+#define LPCLK_CTRL (0x94) /* Low-power in clock lane */
+#define PCKHDL_CFG (0x2C) /* Packet handler configuration */
+#define EDPI_CMD_SIZE (0x64) /* Size for eDPI packets */
+#define MODE_CFG (0x34) /* Video or Command mode selection */
+#define PHY_STATUS (0xB0) /* D-PHY PPI status interface */
+
+#define PHY_STOP_WAIT_TIME (0x30)
+
+/*
+ * regs relevant enum
+ */
+enum dpi_color_coding {
+ DSI_24BITS_1 = 5,
+};
+
+enum dsi_video_mode_type {
+ DSI_NON_BURST_SYNC_PULSES = 0,
+ DSI_NON_BURST_SYNC_EVENTS,
+ DSI_BURST_SYNC_PULSES_1,
+ DSI_BURST_SYNC_PULSES_2
+};
+
+enum dsi_work_mode {
+ DSI_VIDEO_MODE = 0,
+ DSI_COMMAND_MODE
+};
+
+/*
+ * regs Write/Read functions
+ */
+static inline void dsi_phy_tst_set(void __iomem *base, u32 reg, u32 val)
+{
+ writel(reg, base + PHY_TST_CTRL1);
+ /* reg addr written at first */
+ wmb();
+ writel(0x02, base + PHY_TST_CTRL0);
+ /* cmd1 sent for write */
+ wmb();
+ writel(0x00, base + PHY_TST_CTRL0);
+ /* cmd2 sent for write */
+ wmb();
+ writel(val, base + PHY_TST_CTRL1);
+ /* Then write data */
+ wmb();
+ writel(0x02, base + PHY_TST_CTRL0);
+ /* cmd2 sent for write */
+ wmb();
+ writel(0x00, base + PHY_TST_CTRL0);
+}
+
+#endif /* __HISI_DRM_DSI_H__ */
--
1.9.1
