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drm/bridge: tc358764: Add DSI to LVDS bridge driver
Add a drm_bridge driver for the Toshiba TC358764 DSI to LVDS bridge. Changes in v4: - removed license blob, - ordered includes, - added error handling, - fixed reset GPIO handling, - added missing calls to the panel, - custom OF graph code replaced with helpers, - removed tc358764_poweroff from remove callback. v5: - fixed supply names, - fixed broken console - added connector to fb_helper, - added detach callback - unbinding works, - fixed typo in error checking code, - removed sparse bridge->encoder check - core does it already. Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Maciej Purski <m.purski@samsung.com> [ a.hajda@samsung.com: v4, v5 ] Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Reviewed-by: Archit Taneja <architt@codeaurora.org> Link: https://patchwork.freedesktop.org/patch/msgid/20180725154644.25412-6-a.hajda@samsung.com
This commit is contained in:
Andrzej Hajda
parent
eb91cde094
commit
f38b7cca6d
@ -112,6 +112,14 @@ config DRM_THINE_THC63LVD1024
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---help---
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Thine THC63LVD1024 LVDS/parallel converter driver.
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config DRM_TOSHIBA_TC358764
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tristate "TC358764 DSI/LVDS bridge"
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depends on DRM && DRM_PANEL
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depends on OF
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select DRM_MIPI_DSI
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help
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Toshiba TC358764 DSI/LVDS bridge driver.
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config DRM_TOSHIBA_TC358767
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tristate "Toshiba TC358767 eDP bridge"
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depends on OF
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@ -10,6 +10,7 @@ obj-$(CONFIG_DRM_SIL_SII8620) += sil-sii8620.o
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obj-$(CONFIG_DRM_SII902X) += sii902x.o
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obj-$(CONFIG_DRM_SII9234) += sii9234.o
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obj-$(CONFIG_DRM_THINE_THC63LVD1024) += thc63lvd1024.o
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obj-$(CONFIG_DRM_TOSHIBA_TC358764) += tc358764.o
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obj-$(CONFIG_DRM_TOSHIBA_TC358767) += tc358767.o
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obj-$(CONFIG_DRM_ANALOGIX_DP) += analogix/
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obj-$(CONFIG_DRM_I2C_ADV7511) += adv7511/
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499
drivers/gpu/drm/bridge/tc358764.c
Normal file
499
drivers/gpu/drm/bridge/tc358764.c
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@ -0,0 +1,499 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2018 Samsung Electronics Co., Ltd
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*
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* Authors:
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* Andrzej Hajda <a.hajda@samsung.com>
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* Maciej Purski <m.purski@samsung.com>
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*/
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_mipi_dsi.h>
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#include <drm/drm_of.h>
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#include <drm/drm_panel.h>
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#include <drm/drmP.h>
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#include <linux/gpio/consumer.h>
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#include <linux/of_graph.h>
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#include <linux/regulator/consumer.h>
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#include <video/mipi_display.h>
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#define FLD_MASK(start, end) (((1 << ((start) - (end) + 1)) - 1) << (end))
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#define FLD_VAL(val, start, end) (((val) << (end)) & FLD_MASK(start, end))
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/* PPI layer registers */
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#define PPI_STARTPPI 0x0104 /* START control bit */
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#define PPI_LPTXTIMECNT 0x0114 /* LPTX timing signal */
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#define PPI_LANEENABLE 0x0134 /* Enables each lane */
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#define PPI_TX_RX_TA 0x013C /* BTA timing parameters */
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#define PPI_D0S_CLRSIPOCOUNT 0x0164 /* Assertion timer for Lane 0 */
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#define PPI_D1S_CLRSIPOCOUNT 0x0168 /* Assertion timer for Lane 1 */
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#define PPI_D2S_CLRSIPOCOUNT 0x016C /* Assertion timer for Lane 2 */
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#define PPI_D3S_CLRSIPOCOUNT 0x0170 /* Assertion timer for Lane 3 */
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#define PPI_START_FUNCTION 1
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/* DSI layer registers */
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#define DSI_STARTDSI 0x0204 /* START control bit of DSI-TX */
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#define DSI_LANEENABLE 0x0210 /* Enables each lane */
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#define DSI_RX_START 1
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/* Video path registers */
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#define VP_CTRL 0x0450 /* Video Path Control */
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#define VP_CTRL_MSF(v) FLD_VAL(v, 0, 0) /* Magic square in RGB666 */
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#define VP_CTRL_VTGEN(v) FLD_VAL(v, 4, 4) /* Use chip clock for timing */
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#define VP_CTRL_EVTMODE(v) FLD_VAL(v, 5, 5) /* Event mode */
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#define VP_CTRL_RGB888(v) FLD_VAL(v, 8, 8) /* RGB888 mode */
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#define VP_CTRL_VSDELAY(v) FLD_VAL(v, 31, 20) /* VSYNC delay */
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#define VP_CTRL_HSPOL BIT(17) /* Polarity of HSYNC signal */
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#define VP_CTRL_DEPOL BIT(18) /* Polarity of DE signal */
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#define VP_CTRL_VSPOL BIT(19) /* Polarity of VSYNC signal */
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#define VP_HTIM1 0x0454 /* Horizontal Timing Control 1 */
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#define VP_HTIM1_HBP(v) FLD_VAL(v, 24, 16)
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#define VP_HTIM1_HSYNC(v) FLD_VAL(v, 8, 0)
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#define VP_HTIM2 0x0458 /* Horizontal Timing Control 2 */
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#define VP_HTIM2_HFP(v) FLD_VAL(v, 24, 16)
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#define VP_HTIM2_HACT(v) FLD_VAL(v, 10, 0)
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#define VP_VTIM1 0x045C /* Vertical Timing Control 1 */
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#define VP_VTIM1_VBP(v) FLD_VAL(v, 23, 16)
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#define VP_VTIM1_VSYNC(v) FLD_VAL(v, 7, 0)
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#define VP_VTIM2 0x0460 /* Vertical Timing Control 2 */
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#define VP_VTIM2_VFP(v) FLD_VAL(v, 23, 16)
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#define VP_VTIM2_VACT(v) FLD_VAL(v, 10, 0)
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#define VP_VFUEN 0x0464 /* Video Frame Timing Update Enable */
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/* LVDS registers */
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#define LV_MX0003 0x0480 /* Mux input bit 0 to 3 */
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#define LV_MX0407 0x0484 /* Mux input bit 4 to 7 */
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#define LV_MX0811 0x0488 /* Mux input bit 8 to 11 */
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#define LV_MX1215 0x048C /* Mux input bit 12 to 15 */
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#define LV_MX1619 0x0490 /* Mux input bit 16 to 19 */
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#define LV_MX2023 0x0494 /* Mux input bit 20 to 23 */
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#define LV_MX2427 0x0498 /* Mux input bit 24 to 27 */
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#define LV_MX(b0, b1, b2, b3) (FLD_VAL(b0, 4, 0) | FLD_VAL(b1, 12, 8) | \
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FLD_VAL(b2, 20, 16) | FLD_VAL(b3, 28, 24))
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/* Input bit numbers used in mux registers */
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enum {
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LVI_R0,
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LVI_R1,
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LVI_R2,
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LVI_R3,
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LVI_R4,
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LVI_R5,
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LVI_R6,
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LVI_R7,
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LVI_G0,
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LVI_G1,
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LVI_G2,
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LVI_G3,
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LVI_G4,
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LVI_G5,
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LVI_G6,
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LVI_G7,
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LVI_B0,
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LVI_B1,
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LVI_B2,
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LVI_B3,
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LVI_B4,
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LVI_B5,
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LVI_B6,
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LVI_B7,
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LVI_HS,
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LVI_VS,
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LVI_DE,
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LVI_L0
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};
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#define LV_CFG 0x049C /* LVDS Configuration */
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#define LV_PHY0 0x04A0 /* LVDS PHY 0 */
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#define LV_PHY0_RST(v) FLD_VAL(v, 22, 22) /* PHY reset */
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#define LV_PHY0_IS(v) FLD_VAL(v, 15, 14)
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#define LV_PHY0_ND(v) FLD_VAL(v, 4, 0) /* Frequency range select */
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#define LV_PHY0_PRBS_ON(v) FLD_VAL(v, 20, 16) /* Clock/Data Flag pins */
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/* System registers */
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#define SYS_RST 0x0504 /* System Reset */
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#define SYS_ID 0x0580 /* System ID */
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#define SYS_RST_I2CS BIT(0) /* Reset I2C-Slave controller */
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#define SYS_RST_I2CM BIT(1) /* Reset I2C-Master controller */
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#define SYS_RST_LCD BIT(2) /* Reset LCD controller */
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#define SYS_RST_BM BIT(3) /* Reset Bus Management controller */
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#define SYS_RST_DSIRX BIT(4) /* Reset DSI-RX and App controller */
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#define SYS_RST_REG BIT(5) /* Reset Register module */
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#define LPX_PERIOD 2
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#define TTA_SURE 3
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#define TTA_GET 0x20000
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/* Lane enable PPI and DSI register bits */
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#define LANEENABLE_CLEN BIT(0)
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#define LANEENABLE_L0EN BIT(1)
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#define LANEENABLE_L1EN BIT(2)
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#define LANEENABLE_L2EN BIT(3)
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#define LANEENABLE_L3EN BIT(4)
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/* LVCFG fields */
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#define LV_CFG_LVEN BIT(0)
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#define LV_CFG_LVDLINK BIT(1)
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#define LV_CFG_CLKPOL1 BIT(2)
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#define LV_CFG_CLKPOL2 BIT(3)
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static const char * const tc358764_supplies[] = {
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"vddc", "vddio", "vddlvds"
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};
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struct tc358764 {
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struct device *dev;
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struct drm_bridge bridge;
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struct drm_connector connector;
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struct regulator_bulk_data supplies[ARRAY_SIZE(tc358764_supplies)];
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struct gpio_desc *gpio_reset;
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struct drm_panel *panel;
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int error;
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};
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static int tc358764_clear_error(struct tc358764 *ctx)
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{
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int ret = ctx->error;
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ctx->error = 0;
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return ret;
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}
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static void tc358764_read(struct tc358764 *ctx, u16 addr, u32 *val)
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{
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struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
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ssize_t ret;
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if (ctx->error)
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return;
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cpu_to_le16s(&addr);
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ret = mipi_dsi_generic_read(dsi, &addr, sizeof(addr), val, sizeof(*val));
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if (ret >= 0)
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le32_to_cpus(val);
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dev_dbg(ctx->dev, "read: %d, addr: %d\n", addr, *val);
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}
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static void tc358764_write(struct tc358764 *ctx, u16 addr, u32 val)
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{
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struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
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ssize_t ret;
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u8 data[6];
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if (ctx->error)
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return;
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data[0] = addr;
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data[1] = addr >> 8;
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data[2] = val;
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data[3] = val >> 8;
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data[4] = val >> 16;
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data[5] = val >> 24;
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ret = mipi_dsi_generic_write(dsi, data, sizeof(data));
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if (ret < 0)
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ctx->error = ret;
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}
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static inline struct tc358764 *bridge_to_tc358764(struct drm_bridge *bridge)
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{
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return container_of(bridge, struct tc358764, bridge);
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}
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static inline
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struct tc358764 *connector_to_tc358764(struct drm_connector *connector)
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{
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return container_of(connector, struct tc358764, connector);
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}
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static int tc358764_init(struct tc358764 *ctx)
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{
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u32 v = 0;
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tc358764_read(ctx, SYS_ID, &v);
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if (ctx->error)
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return tc358764_clear_error(ctx);
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dev_info(ctx->dev, "ID: %#x\n", v);
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/* configure PPI counters */
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tc358764_write(ctx, PPI_TX_RX_TA, TTA_GET | TTA_SURE);
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tc358764_write(ctx, PPI_LPTXTIMECNT, LPX_PERIOD);
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tc358764_write(ctx, PPI_D0S_CLRSIPOCOUNT, 5);
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tc358764_write(ctx, PPI_D1S_CLRSIPOCOUNT, 5);
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tc358764_write(ctx, PPI_D2S_CLRSIPOCOUNT, 5);
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tc358764_write(ctx, PPI_D3S_CLRSIPOCOUNT, 5);
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/* enable four data lanes and clock lane */
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tc358764_write(ctx, PPI_LANEENABLE, LANEENABLE_L3EN | LANEENABLE_L2EN |
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LANEENABLE_L1EN | LANEENABLE_L0EN | LANEENABLE_CLEN);
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tc358764_write(ctx, DSI_LANEENABLE, LANEENABLE_L3EN | LANEENABLE_L2EN |
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LANEENABLE_L1EN | LANEENABLE_L0EN | LANEENABLE_CLEN);
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/* start */
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tc358764_write(ctx, PPI_STARTPPI, PPI_START_FUNCTION);
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tc358764_write(ctx, DSI_STARTDSI, DSI_RX_START);
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/* configure video path */
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tc358764_write(ctx, VP_CTRL, VP_CTRL_VSDELAY(15) | VP_CTRL_RGB888(1) |
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VP_CTRL_EVTMODE(1) | VP_CTRL_HSPOL | VP_CTRL_VSPOL);
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/* reset PHY */
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tc358764_write(ctx, LV_PHY0, LV_PHY0_RST(1) |
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LV_PHY0_PRBS_ON(4) | LV_PHY0_IS(2) | LV_PHY0_ND(6));
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tc358764_write(ctx, LV_PHY0, LV_PHY0_PRBS_ON(4) | LV_PHY0_IS(2) |
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LV_PHY0_ND(6));
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/* reset bridge */
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tc358764_write(ctx, SYS_RST, SYS_RST_LCD);
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/* set bit order */
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tc358764_write(ctx, LV_MX0003, LV_MX(LVI_R0, LVI_R1, LVI_R2, LVI_R3));
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tc358764_write(ctx, LV_MX0407, LV_MX(LVI_R4, LVI_R7, LVI_R5, LVI_G0));
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tc358764_write(ctx, LV_MX0811, LV_MX(LVI_G1, LVI_G2, LVI_G6, LVI_G7));
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tc358764_write(ctx, LV_MX1215, LV_MX(LVI_G3, LVI_G4, LVI_G5, LVI_B0));
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tc358764_write(ctx, LV_MX1619, LV_MX(LVI_B6, LVI_B7, LVI_B1, LVI_B2));
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tc358764_write(ctx, LV_MX2023, LV_MX(LVI_B3, LVI_B4, LVI_B5, LVI_L0));
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tc358764_write(ctx, LV_MX2427, LV_MX(LVI_HS, LVI_VS, LVI_DE, LVI_R6));
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tc358764_write(ctx, LV_CFG, LV_CFG_CLKPOL2 | LV_CFG_CLKPOL1 |
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LV_CFG_LVEN);
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return tc358764_clear_error(ctx);
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}
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static void tc358764_reset(struct tc358764 *ctx)
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{
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gpiod_set_value(ctx->gpio_reset, 1);
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usleep_range(1000, 2000);
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gpiod_set_value(ctx->gpio_reset, 0);
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usleep_range(1000, 2000);
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}
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static int tc358764_get_modes(struct drm_connector *connector)
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{
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struct tc358764 *ctx = connector_to_tc358764(connector);
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return drm_panel_get_modes(ctx->panel);
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}
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static const
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struct drm_connector_helper_funcs tc358764_connector_helper_funcs = {
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.get_modes = tc358764_get_modes,
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};
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static const struct drm_connector_funcs tc358764_connector_funcs = {
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.fill_modes = drm_helper_probe_single_connector_modes,
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.destroy = drm_connector_cleanup,
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.reset = drm_atomic_helper_connector_reset,
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.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
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};
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static void tc358764_disable(struct drm_bridge *bridge)
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{
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struct tc358764 *ctx = bridge_to_tc358764(bridge);
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int ret = drm_panel_disable(bridge_to_tc358764(bridge)->panel);
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if (ret < 0)
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dev_err(ctx->dev, "error disabling panel (%d)\n", ret);
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}
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static void tc358764_post_disable(struct drm_bridge *bridge)
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{
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struct tc358764 *ctx = bridge_to_tc358764(bridge);
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int ret;
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ret = drm_panel_unprepare(ctx->panel);
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if (ret < 0)
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dev_err(ctx->dev, "error unpreparing panel (%d)\n", ret);
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tc358764_reset(ctx);
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usleep_range(10000, 15000);
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ret = regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
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if (ret < 0)
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dev_err(ctx->dev, "error disabling regulators (%d)\n", ret);
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}
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static void tc358764_pre_enable(struct drm_bridge *bridge)
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{
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struct tc358764 *ctx = bridge_to_tc358764(bridge);
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int ret;
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ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
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if (ret < 0)
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dev_err(ctx->dev, "error enabling regulators (%d)\n", ret);
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usleep_range(10000, 15000);
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tc358764_reset(ctx);
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ret = tc358764_init(ctx);
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if (ret < 0)
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dev_err(ctx->dev, "error initializing bridge (%d)\n", ret);
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ret = drm_panel_prepare(ctx->panel);
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if (ret < 0)
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dev_err(ctx->dev, "error preparing panel (%d)\n", ret);
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}
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static void tc358764_enable(struct drm_bridge *bridge)
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{
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struct tc358764 *ctx = bridge_to_tc358764(bridge);
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int ret = drm_panel_enable(ctx->panel);
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if (ret < 0)
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dev_err(ctx->dev, "error enabling panel (%d)\n", ret);
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}
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|
||||
static int tc358764_attach(struct drm_bridge *bridge)
|
||||
{
|
||||
struct tc358764 *ctx = bridge_to_tc358764(bridge);
|
||||
struct drm_device *drm = bridge->dev;
|
||||
int ret;
|
||||
|
||||
ctx->connector.polled = DRM_CONNECTOR_POLL_HPD;
|
||||
ret = drm_connector_init(drm, &ctx->connector,
|
||||
&tc358764_connector_funcs,
|
||||
DRM_MODE_CONNECTOR_LVDS);
|
||||
if (ret) {
|
||||
DRM_ERROR("Failed to initialize connector\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
drm_connector_helper_add(&ctx->connector,
|
||||
&tc358764_connector_helper_funcs);
|
||||
drm_mode_connector_attach_encoder(&ctx->connector, bridge->encoder);
|
||||
drm_panel_attach(ctx->panel, &ctx->connector);
|
||||
ctx->connector.funcs->reset(&ctx->connector);
|
||||
drm_fb_helper_add_one_connector(drm->fb_helper, &ctx->connector);
|
||||
drm_connector_register(&ctx->connector);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void tc358764_detach(struct drm_bridge *bridge)
|
||||
{
|
||||
struct tc358764 *ctx = bridge_to_tc358764(bridge);
|
||||
struct drm_device *drm = bridge->dev;
|
||||
|
||||
drm_connector_unregister(&ctx->connector);
|
||||
drm_fb_helper_remove_one_connector(drm->fb_helper, &ctx->connector);
|
||||
drm_panel_detach(ctx->panel);
|
||||
ctx->panel = NULL;
|
||||
drm_connector_unreference(&ctx->connector);
|
||||
}
|
||||
|
||||
static const struct drm_bridge_funcs tc358764_bridge_funcs = {
|
||||
.disable = tc358764_disable,
|
||||
.post_disable = tc358764_post_disable,
|
||||
.enable = tc358764_enable,
|
||||
.pre_enable = tc358764_pre_enable,
|
||||
.attach = tc358764_attach,
|
||||
.detach = tc358764_detach,
|
||||
};
|
||||
|
||||
static int tc358764_parse_dt(struct tc358764 *ctx)
|
||||
{
|
||||
struct device *dev = ctx->dev;
|
||||
int ret;
|
||||
|
||||
ctx->gpio_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
|
||||
if (IS_ERR(ctx->gpio_reset)) {
|
||||
dev_err(dev, "no reset GPIO pin provided\n");
|
||||
return PTR_ERR(ctx->gpio_reset);
|
||||
}
|
||||
|
||||
ret = drm_of_find_panel_or_bridge(ctx->dev->of_node, 1, 0, &ctx->panel,
|
||||
NULL);
|
||||
if (ret && ret != -EPROBE_DEFER)
|
||||
dev_err(dev, "cannot find panel (%d)\n", ret);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int tc358764_configure_regulators(struct tc358764 *ctx)
|
||||
{
|
||||
int i, ret;
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(ctx->supplies); ++i)
|
||||
ctx->supplies[i].supply = tc358764_supplies[i];
|
||||
|
||||
ret = devm_regulator_bulk_get(ctx->dev, ARRAY_SIZE(ctx->supplies),
|
||||
ctx->supplies);
|
||||
if (ret < 0)
|
||||
dev_err(ctx->dev, "failed to get regulators: %d\n", ret);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int tc358764_probe(struct mipi_dsi_device *dsi)
|
||||
{
|
||||
struct device *dev = &dsi->dev;
|
||||
struct tc358764 *ctx;
|
||||
int ret;
|
||||
|
||||
ctx = devm_kzalloc(dev, sizeof(struct tc358764), GFP_KERNEL);
|
||||
if (!ctx)
|
||||
return -ENOMEM;
|
||||
|
||||
mipi_dsi_set_drvdata(dsi, ctx);
|
||||
|
||||
ctx->dev = dev;
|
||||
|
||||
dsi->lanes = 4;
|
||||
dsi->format = MIPI_DSI_FMT_RGB888;
|
||||
dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST
|
||||
| MIPI_DSI_MODE_VIDEO_AUTO_VERT | MIPI_DSI_MODE_LPM;
|
||||
|
||||
ret = tc358764_parse_dt(ctx);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = tc358764_configure_regulators(ctx);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ctx->bridge.funcs = &tc358764_bridge_funcs;
|
||||
ctx->bridge.of_node = dev->of_node;
|
||||
|
||||
drm_bridge_add(&ctx->bridge);
|
||||
|
||||
ret = mipi_dsi_attach(dsi);
|
||||
if (ret < 0) {
|
||||
drm_bridge_remove(&ctx->bridge);
|
||||
dev_err(dev, "failed to attach dsi\n");
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int tc358764_remove(struct mipi_dsi_device *dsi)
|
||||
{
|
||||
struct tc358764 *ctx = mipi_dsi_get_drvdata(dsi);
|
||||
|
||||
mipi_dsi_detach(dsi);
|
||||
drm_bridge_remove(&ctx->bridge);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct of_device_id tc358764_of_match[] = {
|
||||
{ .compatible = "toshiba,tc358764" },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, tc358764_of_match);
|
||||
|
||||
static struct mipi_dsi_driver tc358764_driver = {
|
||||
.probe = tc358764_probe,
|
||||
.remove = tc358764_remove,
|
||||
.driver = {
|
||||
.name = "tc358764",
|
||||
.owner = THIS_MODULE,
|
||||
.of_match_table = tc358764_of_match,
|
||||
},
|
||||
};
|
||||
module_mipi_dsi_driver(tc358764_driver);
|
||||
|
||||
MODULE_AUTHOR("Andrzej Hajda <a.hajda@samsung.com>");
|
||||
MODULE_AUTHOR("Maciej Purski <m.purski@samsung.com>");
|
||||
MODULE_DESCRIPTION("MIPI-DSI based Driver for TC358764 DSI/LVDS Bridge");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
Loading…
Reference in New Issue
Block a user