[PATCH v2 08/10] drm/hisilicon: Add dsi encoder driver
Archit Taneja
architt at codeaurora.org
Tue Dec 1 00:58:18 PST 2015
On 11/28/2015 04:09 PM, Xinliang Liu wrote:
> 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*/
It would be nice to fix the comment spacing for uniformity.
> + 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;
> + }
You could simplify this a bit:
delay_count = 100
while (delay_count) {
...
--delay_count;
}
if (!delay_count)
DRM_INFO("...");
> +
> + 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) {
Could we use a better macro name here? Also, it would be nice to pass
the phy argument to it too. Maybe even move the divide by 1000 in the macro.
> + 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;
Maybe replace the 24 above with the bpp in use for future compatibility?
> + 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) {
I don't think we need to worry about the maximum limit if we support
pixel clocks up to 1190 Mhz :)
> + 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);
We should have the encoder as DRM_MODE_ENCODER_DSI here, even if the
connector is finally hdmi.
> + 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);
> +}
> +
This doesn't look like something that should be inlined. Maybe move it
to hisi_drm_dsi.c?
> +#endif /* __HISI_DRM_DSI_H__ */
>
--
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