[PATCH v11 6/7] drm/kmb: Mipi DSI part of the display driver
Anitha Chrisanthus
anitha.chrisanthus at intel.com
Tue Nov 3 19:34:32 UTC 2020
Initializes Mipi DSI and sets up connects to ADV bridge
v2: removed license text
upclassed dev_private, removed HAVE_IRQ. (Sam)
v3: Squashed all 59 commits to one
v4: review changes from Sam Ravnborg
renamed dev_p to kmb
v5: corrected spellings
v6: corrected checkpatch warnings
v7: review changes Sam Ravnborg and Thomas Zimmerman
removed unnecessary logs and defines and ifdef codes (Sam)
split dphy_init_sequence smaller (Sam)
removed redundant checks in kmb_dsi (Sam)
changed kmb_dsi_init to drm_bridge_connector_init and
drm_connector_attach_encoder to bridge's connector (Sam)
v8: call drm_bridge_attach with DRM_BRIDGE_ATTACH_NO_CONNECTOR
v9: renamed kmb_dsi_hw_init to kmb_dsi_mode_set (Daniel V)
v10: changes in driver to accommodate changes in DT to separate DSI
entries (Sam R)
added comments to clarify empty dsi host functions
review changes from Sam to separate out DSI part,
removed dependencies on drm side (Sam R)
v11: review changes for separate msscam node (Sam R, Neil A)
Signed-off-by: Anitha Chrisanthus <anitha.chrisanthus at intel.com>
Reviewed-by: Sam Ravnborg <sam at ravnborg.org>
Cc: Sam Ravnborg <sam at ravnborg.org>
Cc: Thomas Zimmermann <tzimmermann at suse.de>
Cc: Daniel Vetter <daniel at ffwll.ch>
---
drivers/gpu/drm/kmb/kmb_dsi.c | 1562 +++++++++++++++++++++++++++++++++++++++++
drivers/gpu/drm/kmb/kmb_dsi.h | 387 ++++++++++
2 files changed, 1949 insertions(+)
create mode 100644 drivers/gpu/drm/kmb/kmb_dsi.c
create mode 100644 drivers/gpu/drm/kmb/kmb_dsi.h
diff --git a/drivers/gpu/drm/kmb/kmb_dsi.c b/drivers/gpu/drm/kmb/kmb_dsi.c
new file mode 100644
index 0000000..a24723d
--- /dev/null
+++ b/drivers/gpu/drm/kmb/kmb_dsi.c
@@ -0,0 +1,1562 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright © 2019-2020 Intel Corporation
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/of_graph.h>
+#include <linux/mfd/syscon.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_bridge_connector.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_simple_kms_helper.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#include "kmb_dsi.h"
+#include "kmb_regs.h"
+
+static struct mipi_dsi_host *dsi_host;
+static struct mipi_dsi_device *dsi_device;
+static struct drm_bridge *adv_bridge;
+
+/* Default setting is 1080p, 4 lanes */
+#define IMG_HEIGHT_LINES 1080
+#define IMG_WIDTH_PX 1920
+#define MIPI_TX_ACTIVE_LANES 4
+
+static struct mipi_tx_frame_section_cfg mipi_tx_frame0_sect_cfg = {
+ .width_pixels = IMG_WIDTH_PX,
+ .height_lines = IMG_HEIGHT_LINES,
+ .data_type = DSI_LP_DT_PPS_RGB888_24B,
+ .data_mode = MIPI_DATA_MODE1,
+ .dma_packed = 0
+};
+
+static struct mipi_tx_frame_cfg mipitx_frame0_cfg = {
+ .sections[0] = &mipi_tx_frame0_sect_cfg,
+ .sections[1] = NULL,
+ .sections[2] = NULL,
+ .sections[3] = NULL,
+ .vsync_width = 5,
+ .v_backporch = 36,
+ .v_frontporch = 4,
+ .hsync_width = 44,
+ .h_backporch = 148,
+ .h_frontporch = 88
+};
+
+static const struct mipi_tx_dsi_cfg mipitx_dsi_cfg = {
+ .hfp_blank_en = 0,
+ .eotp_en = 0,
+ .lpm_last_vfp_line = 0,
+ .lpm_first_vsa_line = 0,
+ .sync_pulse_eventn = DSI_VIDEO_MODE_NO_BURST_EVENT,
+ .hfp_blanking = SEND_BLANK_PACKET,
+ .hbp_blanking = SEND_BLANK_PACKET,
+ .hsa_blanking = SEND_BLANK_PACKET,
+ .v_blanking = SEND_BLANK_PACKET,
+};
+
+static struct mipi_ctrl_cfg mipi_tx_init_cfg = {
+ .active_lanes = MIPI_TX_ACTIVE_LANES,
+ .lane_rate_mbps = MIPI_TX_LANE_DATA_RATE_MBPS,
+ .ref_clk_khz = MIPI_TX_REF_CLK_KHZ,
+ .cfg_clk_khz = MIPI_TX_CFG_CLK_KHZ,
+ .tx_ctrl_cfg = {
+ .frames[0] = &mipitx_frame0_cfg,
+ .frames[1] = NULL,
+ .frames[2] = NULL,
+ .frames[3] = NULL,
+ .tx_dsi_cfg = &mipitx_dsi_cfg,
+ .line_sync_pkt_en = 0,
+ .line_counter_active = 0,
+ .frame_counter_active = 0,
+ .tx_always_use_hact = 1,
+ .tx_hact_wait_stop = 1,
+ }
+};
+
+struct mipi_hs_freq_range_cfg {
+ u16 default_bit_rate_mbps;
+ u8 hsfreqrange_code;
+};
+
+struct vco_params {
+ u32 freq;
+ u32 range;
+ u32 divider;
+};
+
+static const struct vco_params vco_table[] = {
+ {52, 0x3f, 8},
+ {80, 0x39, 8},
+ {105, 0x2f, 4},
+ {160, 0x29, 4},
+ {210, 0x1f, 2},
+ {320, 0x19, 2},
+ {420, 0x0f, 1},
+ {630, 0x09, 1},
+ {1100, 0x03, 1},
+ {0xffff, 0x01, 1},
+};
+
+static const struct mipi_hs_freq_range_cfg
+mipi_hs_freq_range[MIPI_DPHY_DEFAULT_BIT_RATES] = {
+ {.default_bit_rate_mbps = 80, .hsfreqrange_code = 0x00},
+ {.default_bit_rate_mbps = 90, .hsfreqrange_code = 0x10},
+ {.default_bit_rate_mbps = 100, .hsfreqrange_code = 0x20},
+ {.default_bit_rate_mbps = 110, .hsfreqrange_code = 0x30},
+ {.default_bit_rate_mbps = 120, .hsfreqrange_code = 0x01},
+ {.default_bit_rate_mbps = 130, .hsfreqrange_code = 0x11},
+ {.default_bit_rate_mbps = 140, .hsfreqrange_code = 0x21},
+ {.default_bit_rate_mbps = 150, .hsfreqrange_code = 0x31},
+ {.default_bit_rate_mbps = 160, .hsfreqrange_code = 0x02},
+ {.default_bit_rate_mbps = 170, .hsfreqrange_code = 0x12},
+ {.default_bit_rate_mbps = 180, .hsfreqrange_code = 0x22},
+ {.default_bit_rate_mbps = 190, .hsfreqrange_code = 0x32},
+ {.default_bit_rate_mbps = 205, .hsfreqrange_code = 0x03},
+ {.default_bit_rate_mbps = 220, .hsfreqrange_code = 0x13},
+ {.default_bit_rate_mbps = 235, .hsfreqrange_code = 0x23},
+ {.default_bit_rate_mbps = 250, .hsfreqrange_code = 0x33},
+ {.default_bit_rate_mbps = 275, .hsfreqrange_code = 0x04},
+ {.default_bit_rate_mbps = 300, .hsfreqrange_code = 0x14},
+ {.default_bit_rate_mbps = 325, .hsfreqrange_code = 0x25},
+ {.default_bit_rate_mbps = 350, .hsfreqrange_code = 0x35},
+ {.default_bit_rate_mbps = 400, .hsfreqrange_code = 0x05},
+ {.default_bit_rate_mbps = 450, .hsfreqrange_code = 0x16},
+ {.default_bit_rate_mbps = 500, .hsfreqrange_code = 0x26},
+ {.default_bit_rate_mbps = 550, .hsfreqrange_code = 0x37},
+ {.default_bit_rate_mbps = 600, .hsfreqrange_code = 0x07},
+ {.default_bit_rate_mbps = 650, .hsfreqrange_code = 0x18},
+ {.default_bit_rate_mbps = 700, .hsfreqrange_code = 0x28},
+ {.default_bit_rate_mbps = 750, .hsfreqrange_code = 0x39},
+ {.default_bit_rate_mbps = 800, .hsfreqrange_code = 0x09},
+ {.default_bit_rate_mbps = 850, .hsfreqrange_code = 0x19},
+ {.default_bit_rate_mbps = 900, .hsfreqrange_code = 0x29},
+ {.default_bit_rate_mbps = 1000, .hsfreqrange_code = 0x0A},
+ {.default_bit_rate_mbps = 1050, .hsfreqrange_code = 0x1A},
+ {.default_bit_rate_mbps = 1100, .hsfreqrange_code = 0x2A},
+ {.default_bit_rate_mbps = 1150, .hsfreqrange_code = 0x3B},
+ {.default_bit_rate_mbps = 1200, .hsfreqrange_code = 0x0B},
+ {.default_bit_rate_mbps = 1250, .hsfreqrange_code = 0x1B},
+ {.default_bit_rate_mbps = 1300, .hsfreqrange_code = 0x2B},
+ {.default_bit_rate_mbps = 1350, .hsfreqrange_code = 0x3C},
+ {.default_bit_rate_mbps = 1400, .hsfreqrange_code = 0x0C},
+ {.default_bit_rate_mbps = 1450, .hsfreqrange_code = 0x1C},
+ {.default_bit_rate_mbps = 1500, .hsfreqrange_code = 0x2C},
+ {.default_bit_rate_mbps = 1550, .hsfreqrange_code = 0x3D},
+ {.default_bit_rate_mbps = 1600, .hsfreqrange_code = 0x0D},
+ {.default_bit_rate_mbps = 1650, .hsfreqrange_code = 0x1D},
+ {.default_bit_rate_mbps = 1700, .hsfreqrange_code = 0x2E},
+ {.default_bit_rate_mbps = 1750, .hsfreqrange_code = 0x3E},
+ {.default_bit_rate_mbps = 1800, .hsfreqrange_code = 0x0E},
+ {.default_bit_rate_mbps = 1850, .hsfreqrange_code = 0x1E},
+ {.default_bit_rate_mbps = 1900, .hsfreqrange_code = 0x2F},
+ {.default_bit_rate_mbps = 1950, .hsfreqrange_code = 0x3F},
+ {.default_bit_rate_mbps = 2000, .hsfreqrange_code = 0x0F},
+ {.default_bit_rate_mbps = 2050, .hsfreqrange_code = 0x40},
+ {.default_bit_rate_mbps = 2100, .hsfreqrange_code = 0x41},
+ {.default_bit_rate_mbps = 2150, .hsfreqrange_code = 0x42},
+ {.default_bit_rate_mbps = 2200, .hsfreqrange_code = 0x43},
+ {.default_bit_rate_mbps = 2250, .hsfreqrange_code = 0x44},
+ {.default_bit_rate_mbps = 2300, .hsfreqrange_code = 0x45},
+ {.default_bit_rate_mbps = 2350, .hsfreqrange_code = 0x46},
+ {.default_bit_rate_mbps = 2400, .hsfreqrange_code = 0x47},
+ {.default_bit_rate_mbps = 2450, .hsfreqrange_code = 0x48},
+ {.default_bit_rate_mbps = 2500, .hsfreqrange_code = 0x49}
+};
+
+static void kmb_dsi_clk_disable(struct kmb_dsi *kmb_dsi)
+{
+ clk_disable_unprepare(kmb_dsi->clk_mipi);
+ clk_disable_unprepare(kmb_dsi->clk_mipi_ecfg);
+ clk_disable_unprepare(kmb_dsi->clk_mipi_cfg);
+}
+
+void kmb_dsi_host_unregister(struct kmb_dsi *kmb_dsi)
+{
+ kmb_dsi_clk_disable(kmb_dsi);
+ mipi_dsi_host_unregister(kmb_dsi->host);
+}
+
+/*
+ * This DSI can only be paired with bridges that do config through i2c
+ * which is ADV 7535 in the KMB EVM
+ */
+static ssize_t kmb_dsi_host_transfer(struct mipi_dsi_host *host,
+ const struct mipi_dsi_msg *msg)
+{
+ return 0;
+}
+
+static int kmb_dsi_host_attach(struct mipi_dsi_host *host,
+ struct mipi_dsi_device *dev)
+{
+ return 0;
+}
+
+static int kmb_dsi_host_detach(struct mipi_dsi_host *host,
+ struct mipi_dsi_device *dev)
+{
+ return 0;
+}
+
+static const struct mipi_dsi_host_ops kmb_dsi_host_ops = {
+ .attach = kmb_dsi_host_attach,
+ .detach = kmb_dsi_host_detach,
+ .transfer = kmb_dsi_host_transfer,
+};
+
+int kmb_dsi_host_bridge_init(struct device *dev)
+{
+ struct device_node *encoder_node, *dsi_out;
+
+ /* Create and register MIPI DSI host */
+ if (!dsi_host) {
+ dsi_host = kzalloc(sizeof(*dsi_host), GFP_KERNEL);
+ if (!dsi_host)
+ return -ENOMEM;
+
+ dsi_host->ops = &kmb_dsi_host_ops;
+
+ if (!dsi_device) {
+ dsi_device = kzalloc(sizeof(*dsi_device), GFP_KERNEL);
+ if (!dsi_device) {
+ kfree(dsi_host);
+ return -ENOMEM;
+ }
+ }
+
+ dsi_host->dev = dev;
+ mipi_dsi_host_register(dsi_host);
+ }
+
+ /* Find ADV7535 node and initialize it */
+ dsi_out = of_graph_get_endpoint_by_regs(dev->of_node, 0, 1);
+ if (!dsi_out) {
+ DRM_ERROR("Failed to get dsi_out node info from DT\n");
+ return -EINVAL;
+ }
+ encoder_node = of_graph_get_remote_port_parent(dsi_out);
+ if (!encoder_node) {
+ of_node_put(dsi_out);
+ DRM_ERROR("Failed to get bridge info from DT\n");
+ return -EINVAL;
+ }
+ /* Locate drm bridge from the hdmi encoder DT node */
+ adv_bridge = of_drm_find_bridge(encoder_node);
+ of_node_put(dsi_out);
+ of_node_put(encoder_node);
+ if (!adv_bridge) {
+ DRM_DEBUG("Wait for external bridge driver DT\n");
+ return -EPROBE_DEFER;
+ }
+
+ return 0;
+}
+
+static u32 mipi_get_datatype_params(u32 data_type, u32 data_mode,
+ struct mipi_data_type_params *params)
+{
+ struct mipi_data_type_params data_type_param;
+
+ switch (data_type) {
+ case DSI_LP_DT_PPS_YCBCR420_12B:
+ data_type_param.size_constraint_pixels = 2;
+ data_type_param.size_constraint_bytes = 3;
+ switch (data_mode) {
+ /* Case 0 not supported according to MDK */
+ case 1:
+ case 2:
+ case 3:
+ data_type_param.pixels_per_pclk = 2;
+ data_type_param.bits_per_pclk = 24;
+ break;
+ default:
+ DRM_ERROR("DSI: Invalid data_mode %d\n", data_mode);
+ return -EINVAL;
+ };
+ break;
+ case DSI_LP_DT_PPS_YCBCR422_16B:
+ data_type_param.size_constraint_pixels = 2;
+ data_type_param.size_constraint_bytes = 4;
+ switch (data_mode) {
+ /* Case 0 and 1 not supported according
+ * to MDK
+ */
+ case 2:
+ data_type_param.pixels_per_pclk = 1;
+ data_type_param.bits_per_pclk = 16;
+ break;
+ case 3:
+ data_type_param.pixels_per_pclk = 2;
+ data_type_param.bits_per_pclk = 32;
+ break;
+ default:
+ DRM_ERROR("DSI: Invalid data_mode %d\n", data_mode);
+ return -EINVAL;
+ };
+ break;
+ case DSI_LP_DT_LPPS_YCBCR422_20B:
+ case DSI_LP_DT_PPS_YCBCR422_24B:
+ data_type_param.size_constraint_pixels = 2;
+ data_type_param.size_constraint_bytes = 6;
+ switch (data_mode) {
+ /* Case 0 not supported according to MDK */
+ case 1:
+ case 2:
+ case 3:
+ data_type_param.pixels_per_pclk = 1;
+ data_type_param.bits_per_pclk = 24;
+ break;
+ default:
+ DRM_ERROR("DSI: Invalid data_mode %d\n", data_mode);
+ return -EINVAL;
+ };
+ break;
+ case DSI_LP_DT_PPS_RGB565_16B:
+ data_type_param.size_constraint_pixels = 1;
+ data_type_param.size_constraint_bytes = 2;
+ switch (data_mode) {
+ case 0:
+ case 1:
+ data_type_param.pixels_per_pclk = 1;
+ data_type_param.bits_per_pclk = 16;
+ break;
+ case 2:
+ case 3:
+ data_type_param.pixels_per_pclk = 2;
+ data_type_param.bits_per_pclk = 32;
+ break;
+ default:
+ DRM_ERROR("DSI: Invalid data_mode %d\n", data_mode);
+ return -EINVAL;
+ };
+ break;
+ case DSI_LP_DT_PPS_RGB666_18B:
+ data_type_param.size_constraint_pixels = 4;
+ data_type_param.size_constraint_bytes = 9;
+ data_type_param.bits_per_pclk = 18;
+ data_type_param.pixels_per_pclk = 1;
+ break;
+ case DSI_LP_DT_LPPS_RGB666_18B:
+ case DSI_LP_DT_PPS_RGB888_24B:
+ data_type_param.size_constraint_pixels = 1;
+ data_type_param.size_constraint_bytes = 3;
+ data_type_param.bits_per_pclk = 24;
+ data_type_param.pixels_per_pclk = 1;
+ break;
+ case DSI_LP_DT_PPS_RGB101010_30B:
+ data_type_param.size_constraint_pixels = 4;
+ data_type_param.size_constraint_bytes = 15;
+ data_type_param.bits_per_pclk = 30;
+ data_type_param.pixels_per_pclk = 1;
+ break;
+ default:
+ DRM_ERROR("DSI: Invalid data_type %d\n", data_type);
+ return -EINVAL;
+ };
+
+ *params = data_type_param;
+ return 0;
+}
+
+static u32 compute_wc(u32 width_px, u8 size_constr_p, u8 size_constr_b)
+{
+ /* Calculate the word count for each long packet */
+ return (((width_px / size_constr_p) * size_constr_b) & 0xffff);
+}
+
+static u32 compute_unpacked_bytes(u32 wc, u8 bits_per_pclk)
+{
+ /* Number of PCLK cycles needed to transfer a line
+ * with each PCLK cycle, 4 Bytes are sent through the PPL module
+ */
+ return ((wc * 8) / bits_per_pclk) * 4;
+}
+
+static u32 mipi_tx_fg_section_cfg_regs(struct kmb_dsi *kmb_dsi,
+ u8 frame_id, u8 section,
+ u32 height_lines, u32 unpacked_bytes,
+ struct mipi_tx_frame_sect_phcfg *ph_cfg)
+{
+ u32 cfg = 0;
+ u32 ctrl_no = MIPI_CTRL6;
+ u32 reg_adr;
+
+ /* Frame section packet header */
+ /* Word count bits [15:0] */
+ cfg = (ph_cfg->wc & MIPI_TX_SECT_WC_MASK) << 0;
+
+ /* Data type (bits [21:16]) */
+ cfg |= ((ph_cfg->data_type & MIPI_TX_SECT_DT_MASK)
+ << MIPI_TX_SECT_DT_SHIFT);
+
+ /* Virtual channel (bits [23:22]) */
+ cfg |= ((ph_cfg->vchannel & MIPI_TX_SECT_VC_MASK)
+ << MIPI_TX_SECT_VC_SHIFT);
+
+ /* Data mode (bits [24:25]) */
+ cfg |= ((ph_cfg->data_mode & MIPI_TX_SECT_DM_MASK)
+ << MIPI_TX_SECT_DM_SHIFT);
+ if (ph_cfg->dma_packed)
+ cfg |= MIPI_TX_SECT_DMA_PACKED;
+
+ dev_dbg(kmb_dsi->dev,
+ "ctrl=%d frame_id=%d section=%d cfg=%x packed=%d\n",
+ ctrl_no, frame_id, section, cfg, ph_cfg->dma_packed);
+ kmb_write_mipi(kmb_dsi,
+ (MIPI_TXm_HS_FGn_SECTo_PH(ctrl_no, frame_id, section)),
+ cfg);
+
+ /* Unpacked bytes */
+
+ /* There are 4 frame generators and each fg has 4 sections
+ * There are 2 registers for unpacked bytes (# bytes each
+ * section occupies in memory)
+ * REG_UNPACKED_BYTES0: [15:0]-BYTES0, [31:16]-BYTES1
+ * REG_UNPACKED_BYTES1: [15:0]-BYTES2, [31:16]-BYTES3
+ */
+ reg_adr =
+ MIPI_TXm_HS_FGn_SECT_UNPACKED_BYTES0(ctrl_no,
+ frame_id) + (section / 2) * 4;
+ kmb_write_bits_mipi(kmb_dsi, reg_adr, (section % 2) * 16, 16,
+ unpacked_bytes);
+ dev_dbg(kmb_dsi->dev,
+ "unpacked_bytes = %d, wordcount = %d\n", unpacked_bytes,
+ ph_cfg->wc);
+
+ /* Line config */
+ reg_adr = MIPI_TXm_HS_FGn_SECTo_LINE_CFG(ctrl_no, frame_id, section);
+ kmb_write_mipi(kmb_dsi, reg_adr, height_lines);
+ return 0;
+}
+
+static u32 mipi_tx_fg_section_cfg(struct kmb_dsi *kmb_dsi,
+ u8 frame_id, u8 section,
+ struct mipi_tx_frame_section_cfg *frame_scfg,
+ u32 *bits_per_pclk, u32 *wc)
+{
+ u32 ret = 0;
+ u32 unpacked_bytes;
+ struct mipi_data_type_params data_type_parameters;
+ struct mipi_tx_frame_sect_phcfg ph_cfg;
+
+ ret = mipi_get_datatype_params(frame_scfg->data_type,
+ frame_scfg->data_mode,
+ &data_type_parameters);
+ if (ret)
+ return ret;
+
+ /* Packet width has to be a multiple of the minimum packet width
+ * (in pixels) set for each data type
+ */
+ if (frame_scfg->width_pixels %
+ data_type_parameters.size_constraint_pixels != 0)
+ return -EINVAL;
+
+ *wc = compute_wc(frame_scfg->width_pixels,
+ data_type_parameters.size_constraint_pixels,
+ data_type_parameters.size_constraint_bytes);
+ unpacked_bytes = compute_unpacked_bytes(*wc,
+ data_type_parameters.bits_per_pclk);
+ ph_cfg.wc = *wc;
+ ph_cfg.data_mode = frame_scfg->data_mode;
+ ph_cfg.data_type = frame_scfg->data_type;
+ ph_cfg.dma_packed = frame_scfg->dma_packed;
+ ph_cfg.vchannel = frame_id;
+
+ mipi_tx_fg_section_cfg_regs(kmb_dsi, frame_id, section,
+ frame_scfg->height_lines,
+ unpacked_bytes, &ph_cfg);
+
+ /* Caller needs bits_per_clk for additional caluclations */
+ *bits_per_pclk = data_type_parameters.bits_per_pclk;
+
+ return 0;
+}
+
+static void mipi_tx_fg_cfg_regs(struct kmb_dsi *kmb_dsi, u8 frame_gen,
+ struct mipi_tx_frame_timing_cfg *fg_cfg)
+{
+ u32 sysclk;
+ u32 ppl_llp_ratio;
+ u32 ctrl_no = MIPI_CTRL6, reg_adr, val, offset;
+
+ /* 500 Mhz system clock minus 50 to account for the difference in
+ * MIPI clock speed in RTL tests
+ */
+ sysclk = kmb_dsi->sys_clk_mhz - 50;
+
+ /* PPL-Pixel Packing Layer, LLP-Low Level Protocol
+ * Frame genartor timing parameters are clocked on the system clock,
+ * whereas as the equivalent parameters in the LLP blocks are clocked
+ * on LLP Tx clock from the D-PHY - BYTE clock
+ */
+
+ /* Multiply by 1000 to maintain precision */
+ ppl_llp_ratio = ((fg_cfg->bpp / 8) * sysclk * 1000) /
+ ((fg_cfg->lane_rate_mbps / 8) * fg_cfg->active_lanes);
+
+ dev_dbg(kmb_dsi->dev, "ppl_llp_ratio=%d\n", ppl_llp_ratio);
+ dev_dbg(kmb_dsi->dev, "bpp=%d sysclk=%d lane-rate=%d active-lanes=%d\n",
+ fg_cfg->bpp, sysclk, fg_cfg->lane_rate_mbps,
+ fg_cfg->active_lanes);
+
+ /* Frame generator number of lines */
+ reg_adr = MIPI_TXm_HS_FGn_NUM_LINES(ctrl_no, frame_gen);
+ kmb_write_mipi(kmb_dsi, reg_adr, fg_cfg->v_active);
+
+ /* vsync width
+ * There are 2 registers for vsync width (VSA in lines for
+ * channels 0-3)
+ * REG_VSYNC_WIDTH0: [15:0]-VSA for channel0, [31:16]-VSA for channel1
+ * REG_VSYNC_WIDTH1: [15:0]-VSA for channel2, [31:16]-VSA for channel3
+ */
+ offset = (frame_gen % 2) * 16;
+ reg_adr = MIPI_TXm_HS_VSYNC_WIDTHn(ctrl_no, frame_gen / 2);
+ kmb_write_bits_mipi(kmb_dsi, reg_adr, offset, 16, fg_cfg->vsync_width);
+
+ /* vertical backporch (vbp) */
+ reg_adr = MIPI_TXm_HS_V_BACKPORCHESn(ctrl_no, frame_gen / 2);
+ kmb_write_bits_mipi(kmb_dsi, reg_adr, offset, 16, fg_cfg->v_backporch);
+
+ /* vertical frontporch (vfp) */
+ reg_adr = MIPI_TXm_HS_V_FRONTPORCHESn(ctrl_no, frame_gen / 2);
+ kmb_write_bits_mipi(kmb_dsi, reg_adr, offset, 16, fg_cfg->v_frontporch);
+
+ /* vertical active (vactive) */
+ reg_adr = MIPI_TXm_HS_V_ACTIVEn(ctrl_no, frame_gen / 2);
+ kmb_write_bits_mipi(kmb_dsi, reg_adr, offset, 16, fg_cfg->v_active);
+
+ /* hsync width */
+ reg_adr = MIPI_TXm_HS_HSYNC_WIDTHn(ctrl_no, frame_gen);
+ kmb_write_mipi(kmb_dsi, reg_adr,
+ (fg_cfg->hsync_width * ppl_llp_ratio) / 1000);
+
+ /* horizontal backporch (hbp) */
+ reg_adr = MIPI_TXm_HS_H_BACKPORCHn(ctrl_no, frame_gen);
+ kmb_write_mipi(kmb_dsi, reg_adr,
+ (fg_cfg->h_backporch * ppl_llp_ratio) / 1000);
+
+ /* horizontal frontporch (hfp) */
+ reg_adr = MIPI_TXm_HS_H_FRONTPORCHn(ctrl_no, frame_gen);
+ kmb_write_mipi(kmb_dsi, reg_adr,
+ (fg_cfg->h_frontporch * ppl_llp_ratio) / 1000);
+
+ /* horizontal active (ha) */
+ reg_adr = MIPI_TXm_HS_H_ACTIVEn(ctrl_no, frame_gen);
+
+ /* convert h_active which is wc in bytes to cycles */
+ val = (fg_cfg->h_active * sysclk * 1000) /
+ ((fg_cfg->lane_rate_mbps / 8) * fg_cfg->active_lanes);
+ val /= 1000;
+ kmb_write_mipi(kmb_dsi, reg_adr, val);
+
+ /* llp hsync width */
+ reg_adr = MIPI_TXm_HS_LLP_HSYNC_WIDTHn(ctrl_no, frame_gen);
+ kmb_write_mipi(kmb_dsi, reg_adr, fg_cfg->hsync_width * (fg_cfg->bpp / 8));
+
+ /* llp h backporch */
+ reg_adr = MIPI_TXm_HS_LLP_H_BACKPORCHn(ctrl_no, frame_gen);
+ kmb_write_mipi(kmb_dsi, reg_adr, fg_cfg->h_backporch * (fg_cfg->bpp / 8));
+
+ /* llp h frontporch */
+ reg_adr = MIPI_TXm_HS_LLP_H_FRONTPORCHn(ctrl_no, frame_gen);
+ kmb_write_mipi(kmb_dsi, reg_adr,
+ fg_cfg->h_frontporch * (fg_cfg->bpp / 8));
+}
+
+static void mipi_tx_fg_cfg(struct kmb_dsi *kmb_dsi, u8 frame_gen,
+ u8 active_lanes, u32 bpp, u32 wc,
+ u32 lane_rate_mbps, struct mipi_tx_frame_cfg *fg_cfg)
+{
+ u32 i, fg_num_lines = 0;
+ struct mipi_tx_frame_timing_cfg fg_t_cfg;
+
+ /* Calculate the total frame generator number of
+ * lines based on it's active sections
+ */
+ for (i = 0; i < MIPI_TX_FRAME_GEN_SECTIONS; i++) {
+ if (fg_cfg->sections[i])
+ fg_num_lines += fg_cfg->sections[i]->height_lines;
+ }
+
+ fg_t_cfg.bpp = bpp;
+ fg_t_cfg.lane_rate_mbps = lane_rate_mbps;
+ fg_t_cfg.hsync_width = fg_cfg->hsync_width;
+ fg_t_cfg.h_backporch = fg_cfg->h_backporch;
+ fg_t_cfg.h_frontporch = fg_cfg->h_frontporch;
+ fg_t_cfg.h_active = wc;
+ fg_t_cfg.vsync_width = fg_cfg->vsync_width;
+ fg_t_cfg.v_backporch = fg_cfg->v_backporch;
+ fg_t_cfg.v_frontporch = fg_cfg->v_frontporch;
+ fg_t_cfg.v_active = fg_num_lines;
+ fg_t_cfg.active_lanes = active_lanes;
+
+ /* Apply frame generator timing setting */
+ mipi_tx_fg_cfg_regs(kmb_dsi, frame_gen, &fg_t_cfg);
+}
+
+static void mipi_tx_multichannel_fifo_cfg(struct kmb_dsi *kmb_dsi,
+ u8 active_lanes, u8 vchannel_id)
+{
+ u32 fifo_size, fifo_rthreshold;
+ u32 ctrl_no = MIPI_CTRL6;
+
+ /* Clear all mc fifo channel sizes and thresholds */
+ kmb_write_mipi(kmb_dsi, MIPI_TX_HS_MC_FIFO_CTRL_EN, 0);
+ kmb_write_mipi(kmb_dsi, MIPI_TX_HS_MC_FIFO_CHAN_ALLOC0, 0);
+ kmb_write_mipi(kmb_dsi, MIPI_TX_HS_MC_FIFO_CHAN_ALLOC1, 0);
+ kmb_write_mipi(kmb_dsi, MIPI_TX_HS_MC_FIFO_RTHRESHOLD0, 0);
+ kmb_write_mipi(kmb_dsi, MIPI_TX_HS_MC_FIFO_RTHRESHOLD1, 0);
+
+ fifo_size = ((active_lanes > MIPI_D_LANES_PER_DPHY) ?
+ MIPI_CTRL_4LANE_MAX_MC_FIFO_LOC :
+ MIPI_CTRL_2LANE_MAX_MC_FIFO_LOC) - 1;
+
+ /* MC fifo size for virtual channels 0-3
+ * REG_MC_FIFO_CHAN_ALLOC0: [8:0]-channel0, [24:16]-channel1
+ * REG_MC_FIFO_CHAN_ALLOC1: [8:0]-2, [24:16]-channel3
+ */
+ SET_MC_FIFO_CHAN_ALLOC(kmb_dsi, ctrl_no, vchannel_id, fifo_size);
+
+ /* Set threshold to half the fifo size, actual size=size*16 */
+ fifo_rthreshold = ((fifo_size) * 8) & BIT_MASK_16;
+ SET_MC_FIFO_RTHRESHOLD(kmb_dsi, ctrl_no, vchannel_id, fifo_rthreshold);
+
+ /* Enable the MC FIFO channel corresponding to the Virtual Channel */
+ kmb_set_bit_mipi(kmb_dsi, MIPI_TXm_HS_MC_FIFO_CTRL_EN(ctrl_no),
+ vchannel_id);
+}
+
+static void mipi_tx_ctrl_cfg(struct kmb_dsi *kmb_dsi, u8 fg_id,
+ struct mipi_ctrl_cfg *ctrl_cfg)
+{
+ u32 sync_cfg = 0, ctrl = 0, fg_en;
+ u32 ctrl_no = MIPI_CTRL6;
+
+ /* MIPI_TX_HS_SYNC_CFG */
+ if (ctrl_cfg->tx_ctrl_cfg.line_sync_pkt_en)
+ sync_cfg |= LINE_SYNC_PKT_ENABLE;
+ if (ctrl_cfg->tx_ctrl_cfg.frame_counter_active)
+ sync_cfg |= FRAME_COUNTER_ACTIVE;
+ if (ctrl_cfg->tx_ctrl_cfg.line_counter_active)
+ sync_cfg |= LINE_COUNTER_ACTIVE;
+ if (ctrl_cfg->tx_ctrl_cfg.tx_dsi_cfg->v_blanking)
+ sync_cfg |= DSI_V_BLANKING;
+ if (ctrl_cfg->tx_ctrl_cfg.tx_dsi_cfg->hsa_blanking)
+ sync_cfg |= DSI_HSA_BLANKING;
+ if (ctrl_cfg->tx_ctrl_cfg.tx_dsi_cfg->hbp_blanking)
+ sync_cfg |= DSI_HBP_BLANKING;
+ if (ctrl_cfg->tx_ctrl_cfg.tx_dsi_cfg->hfp_blanking)
+ sync_cfg |= DSI_HFP_BLANKING;
+ if (ctrl_cfg->tx_ctrl_cfg.tx_dsi_cfg->sync_pulse_eventn)
+ sync_cfg |= DSI_SYNC_PULSE_EVENTN;
+ if (ctrl_cfg->tx_ctrl_cfg.tx_dsi_cfg->lpm_first_vsa_line)
+ sync_cfg |= DSI_LPM_FIRST_VSA_LINE;
+ if (ctrl_cfg->tx_ctrl_cfg.tx_dsi_cfg->lpm_last_vfp_line)
+ sync_cfg |= DSI_LPM_LAST_VFP_LINE;
+
+ /* Enable frame generator */
+ fg_en = 1 << fg_id;
+ sync_cfg |= FRAME_GEN_EN(fg_en);
+
+ if (ctrl_cfg->tx_ctrl_cfg.tx_always_use_hact)
+ sync_cfg |= ALWAYS_USE_HACT(fg_en);
+ if (ctrl_cfg->tx_ctrl_cfg.tx_hact_wait_stop)
+ sync_cfg |= HACT_WAIT_STOP(fg_en);
+
+ dev_dbg(kmb_dsi->dev, "sync_cfg=%d fg_en=%d\n", sync_cfg, fg_en);
+
+ /* MIPI_TX_HS_CTRL */
+
+ /* type:DSI, source:LCD */
+ ctrl = HS_CTRL_EN | TX_SOURCE;
+ ctrl |= LCD_VC(fg_id);
+ ctrl |= ACTIVE_LANES(ctrl_cfg->active_lanes - 1);
+ if (ctrl_cfg->tx_ctrl_cfg.tx_dsi_cfg->eotp_en)
+ ctrl |= DSI_EOTP_EN;
+ if (ctrl_cfg->tx_ctrl_cfg.tx_dsi_cfg->hfp_blank_en)
+ ctrl |= DSI_CMD_HFP_EN;
+
+ /*67 ns stop time */
+ ctrl |= HSEXIT_CNT(0x43);
+
+ kmb_write_mipi(kmb_dsi, MIPI_TXm_HS_SYNC_CFG(ctrl_no), sync_cfg);
+ kmb_write_mipi(kmb_dsi, MIPI_TXm_HS_CTRL(ctrl_no), ctrl);
+}
+
+static u32 mipi_tx_init_cntrl(struct kmb_dsi *kmb_dsi,
+ struct mipi_ctrl_cfg *ctrl_cfg)
+{
+ u32 ret = 0;
+ u8 active_vchannels = 0;
+ u8 frame_id, sect;
+ u32 bits_per_pclk = 0;
+ u32 word_count = 0;
+ struct mipi_tx_frame_cfg *frame;
+
+ /* This is the order to initialize MIPI TX:
+ * 1. set frame section parameters
+ * 2. set frame specific parameters
+ * 3. connect lcd to mipi
+ * 4. multi channel fifo cfg
+ * 5. set mipitxcctrlcfg
+ */
+
+ for (frame_id = 0; frame_id < 4; frame_id++) {
+ frame = ctrl_cfg->tx_ctrl_cfg.frames[frame_id];
+
+ /* Find valid frame, assume only one valid frame */
+ if (!frame)
+ continue;
+
+ /* Frame Section configuration */
+ /* TODO - assume there is only one valid section in a frame,
+ * so bits_per_pclk and word_count are only set once
+ */
+ for (sect = 0; sect < MIPI_CTRL_VIRTUAL_CHANNELS; sect++) {
+ if (!frame->sections[sect])
+ continue;
+
+ ret = mipi_tx_fg_section_cfg(kmb_dsi, frame_id, sect,
+ frame->sections[sect],
+ &bits_per_pclk,
+ &word_count);
+ if (ret)
+ return ret;
+ }
+
+ /* Set frame specific parameters */
+ mipi_tx_fg_cfg(kmb_dsi, frame_id, ctrl_cfg->active_lanes,
+ bits_per_pclk, word_count,
+ ctrl_cfg->lane_rate_mbps, frame);
+
+ active_vchannels++;
+
+ /* Stop iterating as only one virtual channel
+ * shall be used for LCD connection
+ */
+ break;
+ }
+
+ if (active_vchannels == 0)
+ return -EINVAL;
+ /* Multi-Channel FIFO Configuration */
+ mipi_tx_multichannel_fifo_cfg(kmb_dsi, ctrl_cfg->active_lanes, frame_id);
+
+ /* Frame Generator Enable */
+ mipi_tx_ctrl_cfg(kmb_dsi, frame_id, ctrl_cfg);
+
+ return ret;
+}
+
+static void test_mode_send(struct kmb_dsi *kmb_dsi, u32 dphy_no,
+ u32 test_code, u32 test_data)
+{
+ /* Steps to send test code:
+ * - set testclk HIGH
+ * - set testdin with test code
+ * - set testen HIGH
+ * - set testclk LOW
+ * - set testen LOW
+ */
+
+ /* Set testclk high */
+ SET_DPHY_TEST_CTRL1_CLK(kmb_dsi, dphy_no);
+
+ /* Set testdin */
+ SET_TEST_DIN0_3(kmb_dsi, dphy_no, test_code);
+
+ /* Set testen high */
+ SET_DPHY_TEST_CTRL1_EN(kmb_dsi, dphy_no);
+
+ /* Set testclk low */
+ CLR_DPHY_TEST_CTRL1_CLK(kmb_dsi, dphy_no);
+
+ /* Set testen low */
+ CLR_DPHY_TEST_CTRL1_EN(kmb_dsi, dphy_no);
+
+ if (test_code) {
+ /* Steps to send test data:
+ * - set testen LOW
+ * - set testclk LOW
+ * - set testdin with data
+ * - set testclk HIGH
+ */
+
+ /* Set testen low */
+ CLR_DPHY_TEST_CTRL1_EN(kmb_dsi, dphy_no);
+
+ /* Set testclk low */
+ CLR_DPHY_TEST_CTRL1_CLK(kmb_dsi, dphy_no);
+
+ /* Set data in testdin */
+ kmb_write_mipi(kmb_dsi,
+ DPHY_TEST_DIN0_3 + ((dphy_no / 0x4) * 0x4),
+ test_data << ((dphy_no % 4) * 8));
+
+ /* Set testclk high */
+ SET_DPHY_TEST_CTRL1_CLK(kmb_dsi, dphy_no);
+ }
+}
+
+static inline void
+ set_test_mode_src_osc_freq_target_low_bits(struct kmb_dsi *kmb_dsi,
+ u32 dphy_no,
+ u32 freq)
+{
+ /* Typical rise/fall time=166, refer Table 1207 databook,
+ * sr_osc_freq_target[7:0]
+ */
+ test_mode_send(kmb_dsi, dphy_no, TEST_CODE_SLEW_RATE_DDL_CYCLES,
+ (freq & 0x7f));
+}
+
+static inline void
+ set_test_mode_src_osc_freq_target_hi_bits(struct kmb_dsi *kmb_dsi,
+ u32 dphy_no,
+ u32 freq)
+{
+ u32 data;
+
+ /* Flag this as high nibble */
+ data = ((freq >> 6) & 0x1f) | (1 << 7);
+
+ /* Typical rise/fall time=166, refer Table 1207 databook,
+ * sr_osc_freq_target[11:7]
+ */
+ test_mode_send(kmb_dsi, dphy_no, TEST_CODE_SLEW_RATE_DDL_CYCLES, data);
+}
+
+static void mipi_tx_get_vco_params(struct vco_params *vco)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(vco_table); i++) {
+ if (vco->freq < vco_table[i].freq) {
+ *vco = vco_table[i];
+ return;
+ }
+ }
+
+ WARN_ONCE(1, "Invalid vco freq = %u for PLL setup\n", vco->freq);
+}
+
+static void mipi_tx_pll_setup(struct kmb_dsi *kmb_dsi, u32 dphy_no,
+ u32 ref_clk_mhz, u32 target_freq_mhz)
+{
+ u32 best_n = 0, best_m = 0;
+ u32 n = 0, m = 0, div = 0, delta, freq = 0, t_freq;
+ u32 best_freq_delta = 3000;
+
+ /* pll_ref_clk: - valid range: 2~64 MHz; Typically 24 MHz
+ * Fvco: - valid range: 320~1250 MHz (Gen3 D-PHY)
+ * Fout: - valid range: 40~1250 MHz (Gen3 D-PHY)
+ * n: - valid range [0 15]
+ * N: - N = n + 1
+ * -valid range: [1 16]
+ * -conditions: - (pll_ref_clk / N) >= 2 MHz
+ * -(pll_ref_clk / N) <= 8 MHz
+ * m: valid range [62 623]
+ * M: - M = m + 2
+ * -valid range [64 625]
+ * -Fvco = (M/N) * pll_ref_clk
+ */
+ struct vco_params vco_p = {
+ .range = 0,
+ .divider = 1,
+ };
+
+ vco_p.freq = target_freq_mhz;
+ mipi_tx_get_vco_params(&vco_p);
+
+ /* Search pll n parameter */
+ for (n = PLL_N_MIN; n <= PLL_N_MAX; n++) {
+ /* Calculate the pll input frequency division ratio
+ * multiply by 1000 for precision -
+ * no floating point, add n for rounding
+ */
+ div = ((ref_clk_mhz * 1000) + n) / (n + 1);
+
+ /* Found a valid n parameter */
+ if ((div < 2000 || div > 8000))
+ continue;
+
+ /* Search pll m parameter */
+ for (m = PLL_M_MIN; m <= PLL_M_MAX; m++) {
+ /* Calculate the Fvco(DPHY PLL output frequency)
+ * using the current n,m params
+ */
+ freq = div * (m + 2);
+ freq /= 1000;
+
+ /* Trim the potential pll freq to max supported */
+ if (freq > PLL_FVCO_MAX)
+ continue;
+
+ delta = abs(freq - target_freq_mhz);
+
+ /* Select the best (closest to target pll freq)
+ * n,m parameters so far
+ */
+ if (delta < best_freq_delta) {
+ best_n = n;
+ best_m = m;
+ best_freq_delta = delta;
+ }
+ }
+ }
+
+ /* Program vco_cntrl parameter
+ * PLL_VCO_Control[5:0] = pll_vco_cntrl_ovr,
+ * PLL_VCO_Control[6] = pll_vco_cntrl_ovr_en
+ */
+ test_mode_send(kmb_dsi, dphy_no, TEST_CODE_PLL_VCO_CTRL, (vco_p.range
+ | (1 << 6)));
+
+ /* Program m, n pll parameters */
+ dev_dbg(kmb_dsi->dev, "m = %d n = %d\n", best_m, best_n);
+
+ /* PLL_Input_Divider_Ratio[3:0] = pll_n_ovr */
+ test_mode_send(kmb_dsi, dphy_no, TEST_CODE_PLL_INPUT_DIVIDER,
+ (best_n & 0x0f));
+
+ /* m - low nibble PLL_Loop_Divider_Ratio[4:0]
+ * pll_m_ovr[4:0]
+ */
+ test_mode_send(kmb_dsi, dphy_no, TEST_CODE_PLL_FEEDBACK_DIVIDER,
+ (best_m & 0x1f));
+
+ /* m - high nibble PLL_Loop_Divider_Ratio[4:0]
+ * pll_m_ovr[9:5]
+ */
+ test_mode_send(kmb_dsi, dphy_no, TEST_CODE_PLL_FEEDBACK_DIVIDER,
+ ((best_m >> 5) & 0x1f) | PLL_FEEDBACK_DIVIDER_HIGH);
+
+ /* Enable overwrite of n,m parameters :pll_n_ovr_en, pll_m_ovr_en */
+ test_mode_send(kmb_dsi, dphy_no, TEST_CODE_PLL_OUTPUT_CLK_SEL,
+ (PLL_N_OVR_EN | PLL_M_OVR_EN));
+
+ /* Program Charge-Pump parameters */
+
+ /* pll_prop_cntrl-fixed values for prop_cntrl from DPHY doc */
+ t_freq = target_freq_mhz * vco_p.divider;
+ test_mode_send(kmb_dsi, dphy_no,
+ TEST_CODE_PLL_PROPORTIONAL_CHARGE_PUMP_CTRL,
+ ((t_freq > 1150) ? 0x0C : 0x0B));
+
+ /* pll_int_cntrl-fixed value for int_cntrl from DPHY doc */
+ test_mode_send(kmb_dsi, dphy_no, TEST_CODE_PLL_INTEGRAL_CHARGE_PUMP_CTRL,
+ 0x00);
+
+ /* pll_gmp_cntrl-fixed value for gmp_cntrl from DPHY doci */
+ test_mode_send(kmb_dsi, dphy_no, TEST_CODE_PLL_GMP_CTRL, 0x10);
+
+ /* pll_cpbias_cntrl-fixed value for cpbias_cntrl from DPHY doc */
+ test_mode_send(kmb_dsi, dphy_no, TEST_CODE_PLL_CHARGE_PUMP_BIAS, 0x10);
+
+ /* pll_th1 -Lock Detector Phase error threshold,
+ * document gives fixed value
+ */
+ test_mode_send(kmb_dsi, dphy_no, TEST_CODE_PLL_PHASE_ERR_CTRL, 0x02);
+
+ /* PLL Lock Configuration */
+
+ /* pll_th2 - Lock Filter length, document gives fixed value */
+ test_mode_send(kmb_dsi, dphy_no, TEST_CODE_PLL_LOCK_FILTER, 0x60);
+
+ /* pll_th3- PLL Unlocking filter, document gives fixed value */
+ test_mode_send(kmb_dsi, dphy_no, TEST_CODE_PLL_UNLOCK_FILTER, 0x03);
+
+ /* pll_lock_sel-PLL Lock Detector Selection,
+ * document gives fixed value
+ */
+ test_mode_send(kmb_dsi, dphy_no, TEST_CODE_PLL_LOCK_DETECTOR, 0x02);
+}
+
+static void set_slewrate_gt_1500(struct kmb_dsi *kmb_dsi, u32 dphy_no)
+{
+ u32 test_code = 0, test_data = 0;
+ /* Bypass slew rate calibration algorithm
+ * bits[1:0} srcal_en_ovr_en, srcal_en_ovr
+ */
+ test_code = TEST_CODE_SLEW_RATE_OVERRIDE_CTRL;
+ test_data = 0x02;
+ test_mode_send(kmb_dsi, dphy_no, test_code, test_data);
+
+ /* Disable slew rate calibration */
+ test_code = TEST_CODE_SLEW_RATE_DDL_LOOP_CTRL;
+ test_data = 0x00;
+ test_mode_send(kmb_dsi, dphy_no, test_code, test_data);
+}
+
+static void set_slewrate_gt_1000(struct kmb_dsi *kmb_dsi, u32 dphy_no)
+{
+ u32 test_code = 0, test_data = 0;
+
+ /* BitRate: > 1 Gbps && <= 1.5 Gbps: - slew rate control ON
+ * typical rise/fall times: 166 ps
+ */
+
+ /* Do not bypass slew rate calibration algorithm
+ * bits[1:0}=srcal_en_ovr_en, srcal_en_ovr, bit[6]=sr_range
+ */
+ test_code = TEST_CODE_SLEW_RATE_OVERRIDE_CTRL;
+ test_data = (0x03 | (1 << 6));
+ test_mode_send(kmb_dsi, dphy_no, test_code, test_data);
+
+ /* Enable slew rate calibration */
+ test_code = TEST_CODE_SLEW_RATE_DDL_LOOP_CTRL;
+ test_data = 0x01;
+ test_mode_send(kmb_dsi, dphy_no, test_code, test_data);
+
+ /* Set sr_osc_freq_target[6:0] low nibble
+ * typical rise/fall time=166, refer Table 1207 databook
+ */
+ test_code = TEST_CODE_SLEW_RATE_DDL_CYCLES;
+ test_data = (0x72f & 0x7f);
+ test_mode_send(kmb_dsi, dphy_no, test_code, test_data);
+
+ /* Set sr_osc_freq_target[11:7] high nibble
+ * Typical rise/fall time=166, refer Table 1207 databook
+ */
+ test_code = TEST_CODE_SLEW_RATE_DDL_CYCLES;
+ test_data = ((0x72f >> 6) & 0x1f) | (1 << 7);
+ test_mode_send(kmb_dsi, dphy_no, test_code, test_data);
+}
+
+static void set_slewrate_lt_1000(struct kmb_dsi *kmb_dsi, u32 dphy_no)
+{
+ u32 test_code = 0, test_data = 0;
+
+ /* lane_rate_mbps <= 1000 Mbps
+ * BitRate: <= 1 Gbps:
+ * - slew rate control ON
+ * - typical rise/fall times: 225 ps
+ */
+
+ /* Do not bypass slew rate calibration algorithm */
+ test_code = TEST_CODE_SLEW_RATE_OVERRIDE_CTRL;
+ test_data = (0x03 | (1 << 6));
+ test_mode_send(kmb_dsi, dphy_no, test_code, test_data);
+
+ /* Enable slew rate calibration */
+ test_code = TEST_CODE_SLEW_RATE_DDL_LOOP_CTRL;
+ test_data = 0x01;
+ test_mode_send(kmb_dsi, dphy_no, test_code, test_data);
+
+ /* Typical rise/fall time=255, refer Table 1207 databook */
+ test_code = TEST_CODE_SLEW_RATE_DDL_CYCLES;
+ test_data = (0x523 & 0x7f);
+ test_mode_send(kmb_dsi, dphy_no, test_code, test_data);
+
+ /* Set sr_osc_freq_target[11:7] high nibble */
+ test_code = TEST_CODE_SLEW_RATE_DDL_CYCLES;
+ test_data = ((0x523 >> 6) & 0x1f) | (1 << 7);
+ test_mode_send(kmb_dsi, dphy_no, test_code, test_data);
+}
+
+static void setup_pll(struct kmb_dsi *kmb_dsi, u32 dphy_no,
+ struct mipi_ctrl_cfg *cfg)
+{
+ u32 test_code = 0, test_data = 0;
+
+ /* Set PLL regulator in bypass */
+ test_code = TEST_CODE_PLL_ANALOG_PROG;
+ test_data = 0x01;
+ test_mode_send(kmb_dsi, dphy_no, test_code, test_data);
+
+ /* PLL Parameters Setup */
+ mipi_tx_pll_setup(kmb_dsi, dphy_no, cfg->ref_clk_khz / 1000,
+ cfg->lane_rate_mbps / 2);
+
+ /* Set clksel */
+ kmb_write_bits_mipi(kmb_dsi, DPHY_INIT_CTRL1, PLL_CLKSEL_0, 2, 0x01);
+
+ /* Set pll_shadow_control */
+ kmb_set_bit_mipi(kmb_dsi, DPHY_INIT_CTRL1, PLL_SHADOW_CTRL);
+}
+
+static void set_lane_data_rate(struct kmb_dsi *kmb_dsi, u32 dphy_no,
+ struct mipi_ctrl_cfg *cfg)
+{
+ u32 i, test_code = 0, test_data = 0;
+
+ for (i = 0; i < MIPI_DPHY_DEFAULT_BIT_RATES; i++) {
+ if (mipi_hs_freq_range[i].default_bit_rate_mbps <
+ cfg->lane_rate_mbps)
+ continue;
+
+ /* Send the test code and data */
+ /* bit[6:0] = hsfreqrange_ovr bit[7] = hsfreqrange_ovr_en */
+ test_code = TEST_CODE_HS_FREQ_RANGE_CFG;
+ test_data = (mipi_hs_freq_range[i].hsfreqrange_code & 0x7f) |
+ (1 << 7);
+ test_mode_send(kmb_dsi, dphy_no, test_code, test_data);
+ break;
+ }
+}
+
+static void dphy_init_sequence(struct kmb_dsi *kmb_dsi,
+ struct mipi_ctrl_cfg *cfg, u32 dphy_no,
+ int active_lanes, enum dphy_mode mode)
+{
+ u32 test_code = 0, test_data = 0, val;
+
+ /* Set D-PHY in shutdown mode */
+ /* Assert RSTZ signal */
+ CLR_DPHY_INIT_CTRL0(kmb_dsi, dphy_no, RESETZ);
+
+ /* Assert SHUTDOWNZ signal */
+ CLR_DPHY_INIT_CTRL0(kmb_dsi, dphy_no, SHUTDOWNZ);
+ val = kmb_read_mipi(kmb_dsi, DPHY_INIT_CTRL0);
+
+ /* Init D-PHY_n
+ * Pulse testclear signal to make sure the d-phy configuration
+ * starts from a clean base
+ */
+ CLR_DPHY_TEST_CTRL0(kmb_dsi, dphy_no);
+ ndelay(15);
+ SET_DPHY_TEST_CTRL0(kmb_dsi, dphy_no);
+ ndelay(15);
+ CLR_DPHY_TEST_CTRL0(kmb_dsi, dphy_no);
+ ndelay(15);
+
+ /* Set mastermacro bit - Master or slave mode */
+ test_code = TEST_CODE_MULTIPLE_PHY_CTRL;
+
+ /* DPHY has its own clock lane enabled (master) */
+ if (mode == MIPI_DPHY_MASTER)
+ test_data = 0x01;
+ else
+ test_data = 0x00;
+
+ /* Send the test code and data */
+ test_mode_send(kmb_dsi, dphy_no, test_code, test_data);
+
+ /* Set the lane data rate */
+ set_lane_data_rate(kmb_dsi, dphy_no, cfg);
+
+ /* High-Speed Tx Slew Rate Calibration
+ * BitRate: > 1.5 Gbps && <= 2.5 Gbps: slew rate control OFF
+ */
+ if (cfg->lane_rate_mbps > 1500)
+ set_slewrate_gt_1500(kmb_dsi, dphy_no);
+ else if (cfg->lane_rate_mbps > 1000)
+ set_slewrate_gt_1000(kmb_dsi, dphy_no);
+ else
+ set_slewrate_lt_1000(kmb_dsi, dphy_no);
+
+ /* Set cfgclkfreqrange */
+ val = (((cfg->cfg_clk_khz / 1000) - 17) * 4) & 0x3f;
+ SET_DPHY_FREQ_CTRL0_3(kmb_dsi, dphy_no, val);
+
+ /* Enable config clk for the corresponding d-phy */
+ kmb_set_bit_mipi(kmb_dsi, DPHY_CFG_CLK_EN, dphy_no);
+
+ /* PLL setup */
+ if (mode == MIPI_DPHY_MASTER)
+ setup_pll(kmb_dsi, dphy_no, cfg);
+
+ /* Send NORMAL OPERATION test code */
+ test_code = 0x0;
+ test_data = 0x0;
+ test_mode_send(kmb_dsi, dphy_no, test_code, test_data);
+
+ /* Configure BASEDIR for data lanes
+ * NOTE: basedir only applies to LANE_0 of each D-PHY.
+ * The other lanes keep their direction based on the D-PHY type,
+ * either Rx or Tx.
+ * bits[5:0] - BaseDir: 1 = Rx
+ * bits[9:6] - BaseDir: 0 = Tx
+ */
+ kmb_write_bits_mipi(kmb_dsi, DPHY_INIT_CTRL2, 0, 9, 0x03f);
+ ndelay(15);
+
+ /* Enable CLOCK LANE
+ * Clock lane should be enabled regardless of the direction
+ * set for the D-PHY (Rx/Tx)
+ */
+ kmb_set_bit_mipi(kmb_dsi, DPHY_INIT_CTRL2, 12 + dphy_no);
+
+ /* Enable DATA LANES */
+ kmb_write_bits_mipi(kmb_dsi, DPHY_ENABLE, dphy_no * 2, 2,
+ ((1 << active_lanes) - 1));
+
+ ndelay(15);
+
+ /* Take D-PHY out of shutdown mode */
+ /* Deassert SHUTDOWNZ signal */
+ SET_DPHY_INIT_CTRL0(kmb_dsi, dphy_no, SHUTDOWNZ);
+ ndelay(15);
+
+ /* Deassert RSTZ signal */
+ SET_DPHY_INIT_CTRL0(kmb_dsi, dphy_no, RESETZ);
+}
+
+static void dphy_wait_fsm(struct kmb_dsi *kmb_dsi, u32 dphy_no,
+ enum dphy_tx_fsm fsm_state)
+{
+ enum dphy_tx_fsm val = DPHY_TX_POWERDWN;
+ int i = 0;
+ int status = 1;
+
+ do {
+ test_mode_send(kmb_dsi, dphy_no, TEST_CODE_FSM_CONTROL, 0x80);
+
+ val = GET_TEST_DOUT4_7(kmb_dsi, dphy_no);
+ i++;
+ if (i > TIMEOUT) {
+ status = 0;
+ break;
+ }
+ } while (val != fsm_state);
+
+ dev_dbg(kmb_dsi->dev, "%s: dphy %d val = %x", __func__, dphy_no, val);
+ dev_dbg(kmb_dsi->dev, "* DPHY %d WAIT_FSM %s *",
+ dphy_no, status ? "SUCCESS" : "FAILED");
+}
+
+static void wait_init_done(struct kmb_dsi *kmb_dsi, u32 dphy_no,
+ u32 active_lanes)
+{
+ u32 stopstatedata = 0;
+ u32 data_lanes = (1 << active_lanes) - 1;
+ int i = 0, val;
+ int status = 1;
+
+ do {
+ val = kmb_read_mipi(kmb_dsi, MIPI_DPHY_STAT4_7);
+ stopstatedata = GET_STOPSTATE_DATA(kmb_dsi, dphy_no)
+ & data_lanes;
+
+ /* TODO-need to add a time out and return failure */
+ i++;
+
+ if (i > TIMEOUT) {
+ status = 0;
+ dev_dbg(kmb_dsi->dev,
+ "! WAIT_INIT_DONE: TIMING OUT!(err_stat=%d)",
+ kmb_read_mipi(kmb_dsi, MIPI_DPHY_ERR_STAT6_7));
+ break;
+ }
+ } while (stopstatedata != data_lanes);
+
+ dev_dbg(kmb_dsi->dev, "* DPHY %d INIT - %s *",
+ dphy_no, status ? "SUCCESS" : "FAILED");
+}
+
+static void wait_pll_lock(struct kmb_dsi *kmb_dsi, u32 dphy_no)
+{
+ int i = 0;
+ int status = 1;
+
+ do {
+ /* TODO-need to add a time out and return failure */
+ i++;
+ if (i > TIMEOUT) {
+ status = 0;
+ dev_dbg(kmb_dsi->dev, "%s: timing out", __func__);
+ break;
+ }
+ } while (!GET_PLL_LOCK(kmb_dsi, dphy_no));
+
+ dev_dbg(kmb_dsi->dev, "* PLL Locked for DPHY %d - %s *",
+ dphy_no, status ? "SUCCESS" : "FAILED");
+}
+
+static u32 mipi_tx_init_dphy(struct kmb_dsi *kmb_dsi,
+ struct mipi_ctrl_cfg *cfg)
+{
+ u32 dphy_no = MIPI_DPHY6;
+
+ /* Multiple D-PHYs needed */
+ if (cfg->active_lanes > MIPI_DPHY_D_LANES) {
+ /*
+ *Initialization for Tx aggregation mode is done according to
+ *a. start init PHY1
+ *b. poll for PHY1 FSM state LOCK
+ * b1. reg addr 0x03[3:0] - state_main[3:0] == 5 (LOCK)
+ *c. poll for PHY1 calibrations done :
+ * c1. termination calibration lower section: addr 0x22[5]
+ * - rescal_done
+ * c2. slewrate calibration (if data rate < = 1500 Mbps):
+ * addr 0xA7[3:2] - srcal_done, sr_finished
+ *d. start init PHY0
+ *e. poll for PHY0 stopstate
+ *f. poll for PHY1 stopstate
+ */
+ /* PHY #N+1 ('slave') */
+
+ dphy_init_sequence(kmb_dsi, cfg, dphy_no + 1,
+ (cfg->active_lanes - MIPI_DPHY_D_LANES),
+ MIPI_DPHY_SLAVE);
+ dphy_wait_fsm(kmb_dsi, dphy_no + 1, DPHY_TX_LOCK);
+
+ /* PHY #N master */
+ dphy_init_sequence(kmb_dsi, cfg, dphy_no, MIPI_DPHY_D_LANES,
+ MIPI_DPHY_MASTER);
+
+ /* Wait for DPHY init to complete */
+ wait_init_done(kmb_dsi, dphy_no, MIPI_DPHY_D_LANES);
+ wait_init_done(kmb_dsi, dphy_no + 1,
+ cfg->active_lanes - MIPI_DPHY_D_LANES);
+ wait_pll_lock(kmb_dsi, dphy_no);
+ wait_pll_lock(kmb_dsi, dphy_no + 1);
+ dphy_wait_fsm(kmb_dsi, dphy_no, DPHY_TX_IDLE);
+ } else { /* Single DPHY */
+ dphy_init_sequence(kmb_dsi, cfg, dphy_no, cfg->active_lanes,
+ MIPI_DPHY_MASTER);
+ dphy_wait_fsm(kmb_dsi, dphy_no, DPHY_TX_IDLE);
+ wait_init_done(kmb_dsi, dphy_no, cfg->active_lanes);
+ wait_pll_lock(kmb_dsi, dphy_no);
+ }
+
+ return 0;
+}
+
+static void connect_lcd_to_mipi(struct kmb_dsi *kmb_dsi)
+{
+ struct regmap *msscam;
+
+ msscam = syscon_regmap_lookup_by_compatible("intel,keembay-msscam");
+ if (IS_ERR(msscam)) {
+ dev_dbg(kmb_dsi->dev, "failed to get msscam syscon");
+ return;
+ }
+
+ /* DISABLE MIPI->CIF CONNECTION */
+ regmap_write(msscam, MSS_MIPI_CIF_CFG, 0);
+
+ /* ENABLE LCD->MIPI CONNECTION */
+ regmap_write(msscam, MSS_LCD_MIPI_CFG, 1);
+ /* DISABLE LCD->CIF LOOPBACK */
+ regmap_write(msscam, MSS_LOOPBACK_CFG, 1);
+}
+
+int kmb_dsi_mode_set(struct kmb_dsi *kmb_dsi, struct drm_display_mode *mode,
+ int sys_clk_mhz)
+{
+ u64 data_rate;
+
+ kmb_dsi->sys_clk_mhz = sys_clk_mhz;
+ mipi_tx_init_cfg.active_lanes = MIPI_TX_ACTIVE_LANES;
+
+ mipi_tx_frame0_sect_cfg.width_pixels = mode->crtc_hdisplay;
+ mipi_tx_frame0_sect_cfg.height_lines = mode->crtc_vdisplay;
+ mipitx_frame0_cfg.vsync_width =
+ mode->crtc_vsync_end - mode->crtc_vsync_start;
+ mipitx_frame0_cfg.v_backporch =
+ mode->crtc_vtotal - mode->crtc_vsync_end;
+ mipitx_frame0_cfg.v_frontporch =
+ mode->crtc_vsync_start - mode->crtc_vdisplay;
+ mipitx_frame0_cfg.hsync_width =
+ mode->crtc_hsync_end - mode->crtc_hsync_start;
+ mipitx_frame0_cfg.h_backporch =
+ mode->crtc_htotal - mode->crtc_hsync_end;
+ mipitx_frame0_cfg.h_frontporch =
+ mode->crtc_hsync_start - mode->crtc_hdisplay;
+
+ /* Lane rate = (vtotal*htotal*fps*bpp)/4 / 1000000
+ * to convert to Mbps
+ */
+ data_rate = ((((u32)mode->crtc_vtotal * (u32)mode->crtc_htotal) *
+ (u32)(drm_mode_vrefresh(mode)) *
+ MIPI_TX_BPP) / mipi_tx_init_cfg.active_lanes) / 1000000;
+
+ dev_dbg(kmb_dsi->dev, "data_rate=%u active_lanes=%d\n",
+ (u32)data_rate, mipi_tx_init_cfg.active_lanes);
+
+ /* When late rate < 800, modeset fails with 4 lanes,
+ * so switch to 2 lanes
+ */
+ if (data_rate < 800) {
+ mipi_tx_init_cfg.active_lanes = 2;
+ mipi_tx_init_cfg.lane_rate_mbps = data_rate * 2;
+ } else {
+ mipi_tx_init_cfg.lane_rate_mbps = data_rate;
+ }
+
+ kmb_write_mipi(kmb_dsi, DPHY_ENABLE, 0);
+ kmb_write_mipi(kmb_dsi, DPHY_INIT_CTRL0, 0);
+ kmb_write_mipi(kmb_dsi, DPHY_INIT_CTRL1, 0);
+ kmb_write_mipi(kmb_dsi, DPHY_INIT_CTRL2, 0);
+
+ /* Initialize mipi controller */
+ mipi_tx_init_cntrl(kmb_dsi, &mipi_tx_init_cfg);
+
+ /* Dphy initialization */
+ mipi_tx_init_dphy(kmb_dsi, &mipi_tx_init_cfg);
+
+ connect_lcd_to_mipi(kmb_dsi);
+ dev_info(kmb_dsi->dev, "mipi hw initialized");
+
+ return 0;
+}
+
+struct kmb_dsi *kmb_dsi_init(struct platform_device *pdev)
+{
+ struct kmb_dsi *kmb_dsi;
+ struct device *dev = get_device(&pdev->dev);
+
+ kmb_dsi = devm_kzalloc(dev, sizeof(*kmb_dsi), GFP_KERNEL);
+ if (!kmb_dsi) {
+ dev_err(dev, "failed to allocate kmb_dsi\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ kmb_dsi->host = dsi_host;
+ kmb_dsi->host->ops = &kmb_dsi_host_ops;
+
+ dsi_device->host = kmb_dsi->host;
+ kmb_dsi->device = dsi_device;
+
+ return kmb_dsi;
+}
+
+int kmb_dsi_encoder_init(struct drm_device *dev, struct kmb_dsi *kmb_dsi)
+{
+ struct drm_encoder *encoder;
+ struct drm_connector *connector;
+ int ret = 0;
+
+ encoder = &kmb_dsi->base;
+ encoder->possible_crtcs = 1;
+ encoder->possible_clones = 0;
+
+ ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_DSI);
+ if (ret) {
+ dev_err(kmb_dsi->dev, "Failed to init encoder %d\n", ret);
+ return ret;
+ }
+
+ /* Link drm_bridge to encoder */
+ ret = drm_bridge_attach(encoder, adv_bridge, NULL,
+ DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+ if (ret) {
+ DRM_ERROR("failed to attach bridge to MIPI\n");
+ drm_encoder_cleanup(encoder);
+ return ret;
+ }
+ drm_info(dev, "Bridge attached : SUCCESS");
+ connector = drm_bridge_connector_init(dev, encoder);
+ if (IS_ERR(connector)) {
+ DRM_ERROR("Unable to create bridge connector");
+ drm_encoder_cleanup(encoder);
+ return PTR_ERR(connector);
+ }
+ drm_connector_attach_encoder(connector, encoder);
+ return 0;
+}
+
+int kmb_dsi_map_mmio(struct kmb_dsi *kmb_dsi)
+{
+ struct resource *res;
+ struct device *dev = kmb_dsi->dev;
+
+ res = platform_get_resource_byname(kmb_dsi->pdev, IORESOURCE_MEM,
+ "mipi");
+ if (!res) {
+ dev_err(dev, "failed to get resource for mipi");
+ return -ENOMEM;
+ }
+ kmb_dsi->mipi_mmio = devm_ioremap_resource(dev, res);
+ if (IS_ERR(kmb_dsi->mipi_mmio)) {
+ dev_err(dev, "failed to ioremap mipi registers");
+ return PTR_ERR(kmb_dsi->mipi_mmio);
+ }
+ return 0;
+}
+
+static int kmb_dsi_clk_enable(struct kmb_dsi *kmb_dsi)
+{
+ int ret;
+ struct device *dev = kmb_dsi->dev;
+
+ ret = clk_prepare_enable(kmb_dsi->clk_mipi);
+ if (ret) {
+ dev_err(dev, "Failed to enable MIPI clock: %d\n", ret);
+ return ret;
+ }
+
+ ret = clk_prepare_enable(kmb_dsi->clk_mipi_ecfg);
+ if (ret) {
+ dev_err(dev, "Failed to enable MIPI_ECFG clock: %d\n", ret);
+ return ret;
+ }
+
+ ret = clk_prepare_enable(kmb_dsi->clk_mipi_cfg);
+ if (ret) {
+ dev_err(dev, "Failed to enable MIPI_CFG clock: %d\n", ret);
+ return ret;
+ }
+
+ dev_info(dev, "SUCCESS : enabled MIPI clocks\n");
+ return 0;
+}
+
+int kmb_dsi_clk_init(struct kmb_dsi *kmb_dsi)
+{
+ struct device *dev = kmb_dsi->dev;
+ unsigned long clk;
+
+ kmb_dsi->clk_mipi = devm_clk_get(dev, "clk_mipi");
+ if (IS_ERR(kmb_dsi->clk_mipi)) {
+ dev_err(dev, "devm_clk_get() failed clk_mipi\n");
+ return PTR_ERR(kmb_dsi->clk_mipi);
+ }
+
+ kmb_dsi->clk_mipi_ecfg = devm_clk_get(dev, "clk_mipi_ecfg");
+ if (IS_ERR(kmb_dsi->clk_mipi_ecfg)) {
+ dev_err(dev, "devm_clk_get() failed clk_mipi_ecfg\n");
+ return PTR_ERR(kmb_dsi->clk_mipi_ecfg);
+ }
+
+ kmb_dsi->clk_mipi_cfg = devm_clk_get(dev, "clk_mipi_cfg");
+ if (IS_ERR(kmb_dsi->clk_mipi_cfg)) {
+ dev_err(dev, "devm_clk_get() failed clk_mipi_cfg\n");
+ return PTR_ERR(kmb_dsi->clk_mipi_cfg);
+ }
+ /* Set MIPI clock to 24 Mhz */
+ clk_set_rate(kmb_dsi->clk_mipi, KMB_MIPI_DEFAULT_CLK);
+ if (clk_get_rate(kmb_dsi->clk_mipi) != KMB_MIPI_DEFAULT_CLK) {
+ dev_err(dev, "failed to set to clk_mipi to %d\n",
+ KMB_MIPI_DEFAULT_CLK);
+ return -1;
+ }
+ dev_dbg(dev, "clk_mipi = %ld\n", clk_get_rate(kmb_dsi->clk_mipi));
+
+ clk = clk_get_rate(kmb_dsi->clk_mipi_ecfg);
+ if (clk != KMB_MIPI_DEFAULT_CFG_CLK) {
+ /* Set MIPI_ECFG clock to 24 Mhz */
+ clk_set_rate(kmb_dsi->clk_mipi_ecfg, KMB_MIPI_DEFAULT_CFG_CLK);
+ clk = clk_get_rate(kmb_dsi->clk_mipi_ecfg);
+ if (clk != KMB_MIPI_DEFAULT_CFG_CLK) {
+ dev_err(dev, "failed to set to clk_mipi_ecfg to %d\n",
+ KMB_MIPI_DEFAULT_CFG_CLK);
+ return -1;
+ }
+ }
+
+ clk = clk_get_rate(kmb_dsi->clk_mipi_cfg);
+ if (clk != KMB_MIPI_DEFAULT_CFG_CLK) {
+ /* Set MIPI_CFG clock to 24 Mhz */
+ clk_set_rate(kmb_dsi->clk_mipi_cfg, 24000000);
+ clk = clk_get_rate(kmb_dsi->clk_mipi_cfg);
+ if (clk != KMB_MIPI_DEFAULT_CFG_CLK) {
+ dev_err(dev, "failed to set clk_mipi_cfg to %d\n",
+ KMB_MIPI_DEFAULT_CFG_CLK);
+ return -1;
+ }
+ }
+
+ return kmb_dsi_clk_enable(kmb_dsi);
+}
diff --git a/drivers/gpu/drm/kmb/kmb_dsi.h b/drivers/gpu/drm/kmb/kmb_dsi.h
new file mode 100644
index 0000000..66b7c50
--- /dev/null
+++ b/drivers/gpu/drm/kmb/kmb_dsi.h
@@ -0,0 +1,387 @@
+/* SPDX-License-Identifier: GPL-2.0-only
+ *
+ * Copyright © 2019-2020 Intel Corporation
+ */
+
+#ifndef __KMB_DSI_H__
+#define __KMB_DSI_H__
+
+#include <drm/drm_encoder.h>
+#include <drm/drm_mipi_dsi.h>
+
+/* MIPI TX CFG */
+#define MIPI_TX_LANE_DATA_RATE_MBPS 891
+#define MIPI_TX_REF_CLK_KHZ 24000
+#define MIPI_TX_CFG_CLK_KHZ 24000
+#define MIPI_TX_BPP 24
+
+/* DPHY Tx test codes*/
+#define TEST_CODE_FSM_CONTROL 0x03
+#define TEST_CODE_MULTIPLE_PHY_CTRL 0x0C
+#define TEST_CODE_PLL_PROPORTIONAL_CHARGE_PUMP_CTRL 0x0E
+#define TEST_CODE_PLL_INTEGRAL_CHARGE_PUMP_CTRL 0x0F
+#define TEST_CODE_PLL_VCO_CTRL 0x12
+#define TEST_CODE_PLL_GMP_CTRL 0x13
+#define TEST_CODE_PLL_PHASE_ERR_CTRL 0x14
+#define TEST_CODE_PLL_LOCK_FILTER 0x15
+#define TEST_CODE_PLL_UNLOCK_FILTER 0x16
+#define TEST_CODE_PLL_INPUT_DIVIDER 0x17
+#define TEST_CODE_PLL_FEEDBACK_DIVIDER 0x18
+#define PLL_FEEDBACK_DIVIDER_HIGH BIT(7)
+#define TEST_CODE_PLL_OUTPUT_CLK_SEL 0x19
+#define PLL_N_OVR_EN BIT(4)
+#define PLL_M_OVR_EN BIT(5)
+#define TEST_CODE_VOD_LEVEL 0x24
+#define TEST_CODE_PLL_CHARGE_PUMP_BIAS 0x1C
+#define TEST_CODE_PLL_LOCK_DETECTOR 0x1D
+#define TEST_CODE_HS_FREQ_RANGE_CFG 0x44
+#define TEST_CODE_PLL_ANALOG_PROG 0x1F
+#define TEST_CODE_SLEW_RATE_OVERRIDE_CTRL 0xA0
+#define TEST_CODE_SLEW_RATE_DDL_LOOP_CTRL 0xA3
+#define TEST_CODE_SLEW_RATE_DDL_CYCLES 0xA4
+
+/* DPHY params */
+#define PLL_N_MIN 0
+#define PLL_N_MAX 15
+#define PLL_M_MIN 62
+#define PLL_M_MAX 623
+#define PLL_FVCO_MAX 1250
+
+#define TIMEOUT 600
+
+#define MIPI_TX_FRAME_GEN 4
+#define MIPI_TX_FRAME_GEN_SECTIONS 4
+#define MIPI_CTRL_VIRTUAL_CHANNELS 4
+#define MIPI_D_LANES_PER_DPHY 2
+#define MIPI_CTRL_2LANE_MAX_MC_FIFO_LOC 255
+#define MIPI_CTRL_4LANE_MAX_MC_FIFO_LOC 511
+/* 2 Data Lanes per D-PHY */
+#define MIPI_DPHY_D_LANES 2
+#define MIPI_DPHY_DEFAULT_BIT_RATES 63
+
+#define KMB_MIPI_DEFAULT_CLK 24000000
+#define KMB_MIPI_DEFAULT_CFG_CLK 24000000
+
+#define to_kmb_dsi(x) container_of(x, struct kmb_dsi, base)
+
+struct kmb_dsi {
+ struct drm_encoder base;
+ struct device *dev;
+ struct platform_device *pdev;
+ struct mipi_dsi_host *host;
+ struct mipi_dsi_device *device;
+ struct drm_bridge *adv_bridge;
+ void __iomem *mipi_mmio;
+ struct clk *clk_mipi;
+ struct clk *clk_mipi_ecfg;
+ struct clk *clk_mipi_cfg;
+ int sys_clk_mhz;
+};
+
+/* DPHY Tx test codes */
+
+enum mipi_ctrl_num {
+ MIPI_CTRL0 = 0,
+ MIPI_CTRL1,
+ MIPI_CTRL2,
+ MIPI_CTRL3,
+ MIPI_CTRL4,
+ MIPI_CTRL5,
+ MIPI_CTRL6,
+ MIPI_CTRL7,
+ MIPI_CTRL8,
+ MIPI_CTRL9,
+ MIPI_CTRL_NA
+};
+
+enum mipi_dphy_num {
+ MIPI_DPHY0 = 0,
+ MIPI_DPHY1,
+ MIPI_DPHY2,
+ MIPI_DPHY3,
+ MIPI_DPHY4,
+ MIPI_DPHY5,
+ MIPI_DPHY6,
+ MIPI_DPHY7,
+ MIPI_DPHY8,
+ MIPI_DPHY9,
+ MIPI_DPHY_NA
+};
+
+enum mipi_dir {
+ MIPI_RX,
+ MIPI_TX
+};
+
+enum mipi_ctrl_type {
+ MIPI_DSI,
+ MIPI_CSI
+};
+
+enum mipi_data_if {
+ MIPI_IF_DMA,
+ MIPI_IF_PARALLEL
+};
+
+enum mipi_data_mode {
+ MIPI_DATA_MODE0,
+ MIPI_DATA_MODE1,
+ MIPI_DATA_MODE2,
+ MIPI_DATA_MODE3
+};
+
+enum mipi_dsi_video_mode {
+ DSI_VIDEO_MODE_NO_BURST_PULSE,
+ DSI_VIDEO_MODE_NO_BURST_EVENT,
+ DSI_VIDEO_MODE_BURST
+};
+
+enum mipi_dsi_blanking_mode {
+ TRANSITION_TO_LOW_POWER,
+ SEND_BLANK_PACKET
+};
+
+enum mipi_dsi_eotp {
+ DSI_EOTP_DISABLED,
+ DSI_EOTP_ENABLES
+};
+
+enum mipi_dsi_data_type {
+ DSI_SP_DT_RESERVED_00 = 0x00,
+ DSI_SP_DT_VSYNC_START = 0x01,
+ DSI_SP_DT_COLOR_MODE_OFF = 0x02,
+ DSI_SP_DT_GENERIC_SHORT_WR = 0x03,
+ DSI_SP_DT_GENERIC_RD = 0x04,
+ DSI_SP_DT_DCS_SHORT_WR = 0x05,
+ DSI_SP_DT_DCS_RD = 0x06,
+ DSI_SP_DT_EOTP = 0x08,
+ DSI_LP_DT_NULL = 0x09,
+ DSI_LP_DT_RESERVED_0A = 0x0a,
+ DSI_LP_DT_RESERVED_0B = 0x0b,
+ DSI_LP_DT_LPPS_YCBCR422_20B = 0x0c,
+ DSI_LP_DT_PPS_RGB101010_30B = 0x0d,
+ DSI_LP_DT_PPS_RGB565_16B = 0x0e,
+ DSI_LP_DT_RESERVED_0F = 0x0f,
+
+ DSI_SP_DT_RESERVED_10 = 0x10,
+ DSI_SP_DT_VSYNC_END = 0x11,
+ DSI_SP_DT_COLOR_MODE_ON = 0x12,
+ DSI_SP_DT_GENERIC_SHORT_WR_1PAR = 0x13,
+ DSI_SP_DT_GENERIC_RD_1PAR = 0x14,
+ DSI_SP_DT_DCS_SHORT_WR_1PAR = 0x15,
+ DSI_SP_DT_RESERVED_16 = 0x16,
+ DSI_SP_DT_RESERVED_17 = 0x17,
+ DSI_SP_DT_RESERVED_18 = 0x18,
+ DSI_LP_DT_BLANK = 0x19,
+ DSI_LP_DT_RESERVED_1A = 0x1a,
+ DSI_LP_DT_RESERVED_1B = 0x1b,
+ DSI_LP_DT_PPS_YCBCR422_24B = 0x1c,
+ DSI_LP_DT_PPS_RGB121212_36B = 0x1d,
+ DSI_LP_DT_PPS_RGB666_18B = 0x1e,
+ DSI_LP_DT_RESERVED_1F = 0x1f,
+
+ DSI_SP_DT_RESERVED_20 = 0x20,
+ DSI_SP_DT_HSYNC_START = 0x21,
+ DSI_SP_DT_SHUT_DOWN_PERIPH_CMD = 0x22,
+ DSI_SP_DT_GENERIC_SHORT_WR_2PAR = 0x23,
+ DSI_SP_DT_GENERIC_RD_2PAR = 0x24,
+ DSI_SP_DT_RESERVED_25 = 0x25,
+ DSI_SP_DT_RESERVED_26 = 0x26,
+ DSI_SP_DT_RESERVED_27 = 0x27,
+ DSI_SP_DT_RESERVED_28 = 0x28,
+ DSI_LP_DT_GENERIC_LONG_WR = 0x29,
+ DSI_LP_DT_RESERVED_2A = 0x2a,
+ DSI_LP_DT_RESERVED_2B = 0x2b,
+ DSI_LP_DT_PPS_YCBCR422_16B = 0x2c,
+ DSI_LP_DT_RESERVED_2D = 0x2d,
+ DSI_LP_DT_LPPS_RGB666_18B = 0x2e,
+ DSI_LP_DT_RESERVED_2F = 0x2f,
+
+ DSI_SP_DT_RESERVED_30 = 0x30,
+ DSI_SP_DT_HSYNC_END = 0x31,
+ DSI_SP_DT_TURN_ON_PERIPH_CMD = 0x32,
+ DSI_SP_DT_RESERVED_33 = 0x33,
+ DSI_SP_DT_RESERVED_34 = 0x34,
+ DSI_SP_DT_RESERVED_35 = 0x35,
+ DSI_SP_DT_RESERVED_36 = 0x36,
+ DSI_SP_DT_SET_MAX_RETURN_PKT_SIZE = 0x37,
+ DSI_SP_DT_RESERVED_38 = 0x38,
+ DSI_LP_DT_DSC_LONG_WR = 0x39,
+ DSI_LP_DT_RESERVED_3A = 0x3a,
+ DSI_LP_DT_RESERVED_3B = 0x3b,
+ DSI_LP_DT_RESERVED_3C = 0x3c,
+ DSI_LP_DT_PPS_YCBCR420_12B = 0x3d,
+ DSI_LP_DT_PPS_RGB888_24B = 0x3e,
+ DSI_LP_DT_RESERVED_3F = 0x3f
+};
+
+enum mipi_tx_hs_tp_sel {
+ MIPI_TX_HS_TP_WHOLE_FRAME_COLOR0 = 0,
+ MIPI_TX_HS_TP_WHOLE_FRAME_COLOR1,
+ MIPI_TX_HS_TP_V_STRIPES,
+ MIPI_TX_HS_TP_H_STRIPES,
+};
+
+enum dphy_mode {
+ MIPI_DPHY_SLAVE = 0,
+ MIPI_DPHY_MASTER
+};
+
+enum dphy_tx_fsm {
+ DPHY_TX_POWERDWN = 0,
+ DPHY_TX_BGPON,
+ DPHY_TX_TERMCAL,
+ DPHY_TX_TERMCALUP,
+ DPHY_TX_OFFSETCAL,
+ DPHY_TX_LOCK,
+ DPHY_TX_SRCAL,
+ DPHY_TX_IDLE,
+ DPHY_TX_ULP,
+ DPHY_TX_LANESTART,
+ DPHY_TX_CLKALIGN,
+ DPHY_TX_DDLTUNNING,
+ DPHY_TX_ULP_FORCE_PLL,
+ DPHY_TX_LOCK_LOSS
+};
+
+struct mipi_data_type_params {
+ u8 size_constraint_pixels;
+ u8 size_constraint_bytes;
+ u8 pixels_per_pclk;
+ u8 bits_per_pclk;
+};
+
+struct mipi_tx_dsi_cfg {
+ u8 hfp_blank_en; /* Horizontal front porch blanking enable */
+ u8 eotp_en; /* End of transmission packet enable */
+ /* Last vertical front porch blanking mode */
+ u8 lpm_last_vfp_line;
+ /* First vertical sync active blanking mode */
+ u8 lpm_first_vsa_line;
+ u8 sync_pulse_eventn; /* Sync type */
+ u8 hfp_blanking; /* Horizontal front porch blanking mode */
+ u8 hbp_blanking; /* Horizontal back porch blanking mode */
+ u8 hsa_blanking; /* Horizontal sync active blanking mode */
+ u8 v_blanking; /* Vertical timing blanking mode */
+};
+
+struct mipi_tx_frame_section_cfg {
+ u32 dma_v_stride;
+ u16 dma_v_scale_cfg;
+ u16 width_pixels;
+ u16 height_lines;
+ u8 dma_packed;
+ u8 bpp;
+ u8 bpp_unpacked;
+ u8 dma_h_stride;
+ u8 data_type;
+ u8 data_mode;
+ u8 dma_flip_rotate_sel;
+};
+
+struct mipi_tx_frame_timing_cfg {
+ u32 bpp;
+ u32 lane_rate_mbps;
+ u32 hsync_width;
+ u32 h_backporch;
+ u32 h_frontporch;
+ u32 h_active;
+ u16 vsync_width;
+ u16 v_backporch;
+ u16 v_frontporch;
+ u16 v_active;
+ u8 active_lanes;
+};
+
+struct mipi_tx_frame_sect_phcfg {
+ u32 wc;
+ enum mipi_data_mode data_mode;
+ enum mipi_dsi_data_type data_type;
+ u8 vchannel;
+ u8 dma_packed;
+};
+
+struct mipi_tx_frame_cfg {
+ struct mipi_tx_frame_section_cfg *sections[MIPI_TX_FRAME_GEN_SECTIONS];
+ u32 hsync_width; /* in pixels */
+ u32 h_backporch; /* in pixels */
+ u32 h_frontporch; /* in pixels */
+ u16 vsync_width; /* in lines */
+ u16 v_backporch; /* in lines */
+ u16 v_frontporch; /* in lines */
+};
+
+struct mipi_tx_ctrl_cfg {
+ struct mipi_tx_frame_cfg *frames[MIPI_TX_FRAME_GEN];
+ const struct mipi_tx_dsi_cfg *tx_dsi_cfg;
+ u8 line_sync_pkt_en;
+ u8 line_counter_active;
+ u8 frame_counter_active;
+ u8 tx_hsclkkidle_cnt;
+ u8 tx_hsexit_cnt;
+ u8 tx_crc_en;
+ u8 tx_hact_wait_stop;
+ u8 tx_always_use_hact;
+ u8 tx_wait_trig;
+ u8 tx_wait_all_sect;
+};
+
+/* configuration structure for MIPI control */
+struct mipi_ctrl_cfg {
+ u8 active_lanes; /* # active lanes per controller 2/4 */
+ u32 lane_rate_mbps; /* MBPS */
+ u32 ref_clk_khz;
+ u32 cfg_clk_khz;
+ struct mipi_tx_ctrl_cfg tx_ctrl_cfg;
+};
+
+static inline void kmb_write_mipi(struct kmb_dsi *kmb_dsi,
+ unsigned int reg, u32 value)
+{
+ writel(value, (kmb_dsi->mipi_mmio + reg));
+}
+
+static inline u32 kmb_read_mipi(struct kmb_dsi *kmb_dsi, unsigned int reg)
+{
+ return readl(kmb_dsi->mipi_mmio + reg);
+}
+
+static inline void kmb_write_bits_mipi(struct kmb_dsi *kmb_dsi,
+ unsigned int reg, u32 offset,
+ u32 num_bits, u32 value)
+{
+ u32 reg_val = kmb_read_mipi(kmb_dsi, reg);
+ u32 mask = (1 << num_bits) - 1;
+
+ value &= mask;
+ mask <<= offset;
+ reg_val &= (~mask);
+ reg_val |= (value << offset);
+ kmb_write_mipi(kmb_dsi, reg, reg_val);
+}
+
+static inline void kmb_set_bit_mipi(struct kmb_dsi *kmb_dsi,
+ unsigned int reg, u32 offset)
+{
+ u32 reg_val = kmb_read_mipi(kmb_dsi, reg);
+
+ kmb_write_mipi(kmb_dsi, reg, reg_val | (1 << offset));
+}
+
+static inline void kmb_clr_bit_mipi(struct kmb_dsi *kmb_dsi,
+ unsigned int reg, u32 offset)
+{
+ u32 reg_val = kmb_read_mipi(kmb_dsi, reg);
+
+ kmb_write_mipi(kmb_dsi, reg, reg_val & (~(1 << offset)));
+}
+
+int kmb_dsi_host_bridge_init(struct device *dev);
+struct kmb_dsi *kmb_dsi_init(struct platform_device *pdev);
+void kmb_dsi_host_unregister(struct kmb_dsi *kmb_dsi);
+int kmb_dsi_mode_set(struct kmb_dsi *kmb_dsi, struct drm_display_mode *mode,
+ int sys_clk_mhz);
+int kmb_dsi_map_mmio(struct kmb_dsi *kmb_dsi);
+int kmb_dsi_clk_init(struct kmb_dsi *kmb_dsi);
+int kmb_dsi_encoder_init(struct drm_device *dev, struct kmb_dsi *kmb_dsi);
+#endif /* __KMB_DSI_H__ */
--
2.7.4
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