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Message-ID: <CAA8EJpoWXtmMt9vpG9Q4dpv6HnMjtdmEo6rbBszXNG30NhbB1A@mail.gmail.com>
Date: Mon, 30 Oct 2023 01:10:08 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Sui Jingfeng <suijingfeng@...ngson.cn>
Cc: Maxime Ripard <mripard@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH 3/8] drm/loongson: Allow attach drm bridge driver by
calling lsdc_output_init()
On Sun, 29 Oct 2023 at 21:46, Sui Jingfeng <suijingfeng@...ngson.cn> wrote:
>
> Move the sharable subroutine into lsdc_output.c and refactor.
>
> Signed-off-by: Sui Jingfeng <suijingfeng@...ngson.cn>
> ---
> drivers/gpu/drm/loongson/Makefile | 1 +
> drivers/gpu/drm/loongson/lsdc_drv.h | 17 -
> drivers/gpu/drm/loongson/lsdc_output.c | 640 +++++++++++++++++++++++++
> drivers/gpu/drm/loongson/lsdc_output.h | 52 +-
This diffstat doesn't match patch description.
> 4 files changed, 691 insertions(+), 19 deletions(-)
> create mode 100644 drivers/gpu/drm/loongson/lsdc_output.c
>
> diff --git a/drivers/gpu/drm/loongson/Makefile b/drivers/gpu/drm/loongson/Makefile
> index 1459d19b2c90..393709e686aa 100644
> --- a/drivers/gpu/drm/loongson/Makefile
> +++ b/drivers/gpu/drm/loongson/Makefile
> @@ -9,6 +9,7 @@ loongson-y := \
> lsdc_gfxpll.o \
> lsdc_i2c.o \
> lsdc_irq.o \
> + lsdc_output.o \
> lsdc_output_7a1000.o \
> lsdc_output_7a2000.o \
> lsdc_plane.o \
> diff --git a/drivers/gpu/drm/loongson/lsdc_drv.h b/drivers/gpu/drm/loongson/lsdc_drv.h
> index 335953c988d1..46ba9b88a30d 100644
> --- a/drivers/gpu/drm/loongson/lsdc_drv.h
> +++ b/drivers/gpu/drm/loongson/lsdc_drv.h
> @@ -175,23 +175,6 @@ struct lsdc_cursor {
> struct lsdc_device *ldev;
> };
>
> -struct lsdc_output {
> - struct drm_encoder encoder;
> - struct drm_connector connector;
> -};
> -
> -static inline struct lsdc_output *
> -connector_to_lsdc_output(struct drm_connector *connector)
> -{
> - return container_of(connector, struct lsdc_output, connector);
> -}
> -
> -static inline struct lsdc_output *
> -encoder_to_lsdc_output(struct drm_encoder *encoder)
> -{
> - return container_of(encoder, struct lsdc_output, encoder);
> -}
> -
> struct lsdc_display_pipe {
> struct lsdc_crtc crtc;
> struct lsdc_primary primary;
> diff --git a/drivers/gpu/drm/loongson/lsdc_output.c b/drivers/gpu/drm/loongson/lsdc_output.c
> new file mode 100644
> index 000000000000..8262c3f91ebe
> --- /dev/null
> +++ b/drivers/gpu/drm/loongson/lsdc_output.c
> @@ -0,0 +1,640 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Copyright (C) 2023 Loongson Technology Corporation Limited
> + */
> +
> +#include <linux/delay.h>
> +
> +#include <drm/drm_atomic_helper.h>
> +#include <drm/drm_bridge.h>
> +#include <drm/drm_debugfs.h>
> +#include <drm/drm_edid.h>
> +#include <drm/drm_probe_helper.h>
> +
> +#include "lsdc_drv.h"
> +#include "lsdc_output.h"
> +
> +/* This file contain shared subroutines for the output part */
> +
> +/* Usable for generic DVO, VGA and buitl-in HDMI connector */
> +
> +static int lsdc_connector_get_modes(struct drm_connector *connector)
> +{
> + unsigned int num = 0;
> + struct edid *edid;
> +
> + if (connector->ddc) {
> + edid = drm_get_edid(connector, connector->ddc);
> + if (edid) {
> + drm_connector_update_edid_property(connector, edid);
> + num = drm_add_edid_modes(connector, edid);
> + kfree(edid);
> + }
> +
> + return num;
drm_connector_helper_get_modes_from_ddc()
> + }
> +
> + num = drm_add_modes_noedid(connector, 1920, 1200);
> +
> + drm_set_preferred_mode(connector, 1024, 768);
> +
> + return num;
> +}
> +
> +static struct drm_encoder *
> +lsdc_connector_get_best_encoder(struct drm_connector *connector,
> + struct drm_atomic_state *state)
> +{
> + struct lsdc_output *output = connector_to_lsdc_output(connector);
> +
> + return &output->encoder;
Do you really need it? Does drm_connector_get_single_encoder() work
for your case?
> +}
> +
> +const struct drm_connector_helper_funcs lsdc_connector_helper_funcs = {
> + .atomic_best_encoder = lsdc_connector_get_best_encoder,
> + .get_modes = lsdc_connector_get_modes,
> +};
> +
> +static enum drm_connector_status
> +lsdc_connector_detect(struct drm_connector *connector, bool force)
> +{
> + struct i2c_adapter *ddc = connector->ddc;
> +
> + if (ddc) {
> + if (drm_probe_ddc(ddc))
> + return connector_status_connected;
> +
> + return connector_status_disconnected;
> + }
> +
> + return connector_status_unknown;
> +}
> +
> +const struct drm_connector_funcs lsdc_connector_funcs = {
> + .detect = lsdc_connector_detect,
> + .fill_modes = drm_helper_probe_single_connector_modes,
> + .destroy = drm_connector_cleanup,
> + .reset = drm_atomic_helper_connector_reset,
> + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
> + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state
> +};
> +
> +/* debugfs */
> +
> +#define LSDC_HDMI_REG(i, reg) { \
> + .name = __stringify_1(LSDC_HDMI##i##_##reg##_REG), \
> + .offset = LSDC_HDMI##i##_##reg##_REG, \
> +}
> +
> +static int lsdc_hdmi_regs_show(struct seq_file *m, void *data)
> +{
> + struct drm_info_node *node = (struct drm_info_node *)m->private;
> + struct drm_device *ddev = node->minor->dev;
> + struct lsdc_device *ldev = to_lsdc(ddev);
> + const struct lsdc_reg32 *preg;
> +
> + preg = (const struct lsdc_reg32 *)node->info_ent->data;
> +
> + while (preg->name) {
> + u32 offset = preg->offset;
> +
> + seq_printf(m, "%s (0x%04x): 0x%08x\n",
> + preg->name, offset, lsdc_rreg32(ldev, offset));
> + ++preg;
> + }
> +
> + return 0;
> +}
> +
> +/* LSDC built-in HDMI encoder, connected with display pipe 0 */
> +
> +static const struct lsdc_reg32 lsdc_hdmi_regs_pipe0[] = {
> + LSDC_HDMI_REG(0, ZONE),
> + LSDC_HDMI_REG(0, INTF_CTRL),
> + LSDC_HDMI_REG(0, PHY_CTRL),
> + LSDC_HDMI_REG(0, PHY_PLL),
> + LSDC_HDMI_REG(0, AVI_INFO_CRTL),
> + LSDC_HDMI_REG(0, PHY_CAL),
> + LSDC_HDMI_REG(0, AUDIO_PLL_LO),
> + LSDC_HDMI_REG(0, AUDIO_PLL_HI),
> + {NULL, 0}, /* MUST be {NULL, 0} terminated */
> +};
> +
> +static const struct drm_info_list lsdc_pipe0_hdmi_debugfs_files[] = {
> + { "regs", lsdc_hdmi_regs_show, 0, (void *)lsdc_hdmi_regs_pipe0 },
> +};
> +
> +static enum drm_connector_status
> +lsdc_pipe0_hdmi_connector_detect(struct drm_connector *connector, bool force)
> +{
> + struct lsdc_device *ldev = to_lsdc(connector->dev);
> + u32 val;
> +
> + val = lsdc_rreg32(ldev, LSDC_HDMI_HPD_STATUS_REG);
> +
> + if (val & HDMI0_HPD_FLAG)
> + return connector_status_connected;
> +
> + return connector_status_disconnected;
> +}
> +
> +static void lsdc_pipe0_hdmi_late_register(struct drm_connector *connector,
> + struct dentry *root)
> +{
> + struct drm_device *ddev = connector->dev;
> + struct drm_minor *minor = ddev->primary;
> +
> + drm_debugfs_create_files(lsdc_pipe0_hdmi_debugfs_files,
> + ARRAY_SIZE(lsdc_pipe0_hdmi_debugfs_files),
> + root, minor);
> +}
> +
> +const struct drm_connector_funcs lsdc_pipe0_hdmi_connector_funcs = {
> + .detect = lsdc_pipe0_hdmi_connector_detect,
> + .fill_modes = drm_helper_probe_single_connector_modes,
> + .destroy = drm_connector_cleanup,
> + .reset = drm_atomic_helper_connector_reset,
> + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
> + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
> + .debugfs_init = lsdc_pipe0_hdmi_late_register,
> +};
> +
> +/* LSDC built-in HDMI connector, connected with display pipe 1 */
> +
> +static enum drm_connector_status
> +lsdc_pipe1_hdmi_connector_detect(struct drm_connector *connector, bool force)
> +{
> + struct lsdc_device *ldev = to_lsdc(connector->dev);
> + u32 val;
> +
> + val = lsdc_rreg32(ldev, LSDC_HDMI_HPD_STATUS_REG);
> +
> + if (val & HDMI1_HPD_FLAG)
> + return connector_status_connected;
> +
> + return connector_status_disconnected;
> +}
> +
> +static const struct lsdc_reg32 lsdc_pipe1_hdmi_encoder_regs[] = {
> + LSDC_HDMI_REG(1, ZONE),
> + LSDC_HDMI_REG(1, INTF_CTRL),
> + LSDC_HDMI_REG(1, PHY_CTRL),
> + LSDC_HDMI_REG(1, PHY_PLL),
> + LSDC_HDMI_REG(1, AVI_INFO_CRTL),
> + LSDC_HDMI_REG(1, PHY_CAL),
> + LSDC_HDMI_REG(1, AUDIO_PLL_LO),
> + LSDC_HDMI_REG(1, AUDIO_PLL_HI),
> + {NULL, 0}, /* MUST be {NULL, 0} terminated */
> +};
> +
> +static const struct drm_info_list lsdc_pipe1_hdmi_debugfs_files[] = {
> + { "regs", lsdc_hdmi_regs_show, 0, (void *)lsdc_pipe1_hdmi_encoder_regs },
> +};
> +
> +static void lsdc_pipe1_hdmi_late_register(struct drm_connector *connector,
> + struct dentry *root)
> +{
> + struct drm_device *ddev = connector->dev;
> + struct drm_minor *minor = ddev->primary;
> +
> + drm_debugfs_create_files(lsdc_pipe1_hdmi_debugfs_files,
> + ARRAY_SIZE(lsdc_pipe1_hdmi_debugfs_files),
> + root, minor);
> +}
> +
> +const struct drm_connector_funcs lsdc_pipe1_hdmi_connector_funcs = {
> + .detect = lsdc_pipe1_hdmi_connector_detect,
> + .fill_modes = drm_helper_probe_single_connector_modes,
> + .destroy = drm_connector_cleanup,
> + .reset = drm_atomic_helper_connector_reset,
> + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
> + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
> + .debugfs_init = lsdc_pipe1_hdmi_late_register,
> +};
> +
> +/*
> + * Fout = M * in_khz
> + *
> + * M = (4 * LF) / (IDF * ODF)
> + *
> + * IDF: Input Division Factor
> + * ODF: Output Division Factor
> + * LF: Loop Factor
> + * M: Required Mult
> + *
> + * +--------------------------------------------------------+
> + * | in_khz | M | IDF | LF | ODF | Fout(Mhz) |
> + * |-------------------+----+-----+----+-----+--------------|
> + * | 170000 ~ 340000 | 10 | 16 | 40 | 1 | 1700 ~ 3400 |
> + * | 85000 ~ 170000 | 10 | 8 | 40 | 2 | 850 ~ 1700 |
> + * | 42500 ~ 85000 | 10 | 4 | 40 | 4 | 425 ~ 850 |
> + * | 21250 ~ 42500 | 10 | 2 | 40 | 8 | 212.5 ~ 425 |
> + * | 20000 ~ 21250 | 10 | 1 | 40 | 16 | 200 ~ 212.5 |
> + * +--------------------------------------------------------+
> + */
> +static void lsdc_hdmi_phy_pll_config(struct drm_device *ddev,
> + int in_khz,
> + unsigned int pipe)
> +{
> + struct lsdc_device *ldev = to_lsdc(ddev);
> + int count = 0;
> + u32 val;
> +
> + /* Firstly, disable phy pll */
> + lsdc_pipe_wreg32(ldev, LSDC_HDMI0_PHY_PLL_REG, pipe, 0x0);
> +
> + /*
> + * Most of time, loongson HDMI require M = 10
> + * for example, 10 = (4 * 40) / (8 * 2)
> + * here, write "1" to the ODF will get "2"
> + */
> +
> + if (in_khz >= 170000)
> + val = (16 << HDMI_PLL_IDF_SHIFT) |
> + (40 << HDMI_PLL_LF_SHIFT) |
> + (0 << HDMI_PLL_ODF_SHIFT);
> + else if (in_khz >= 85000)
> + val = (8 << HDMI_PLL_IDF_SHIFT) |
> + (40 << HDMI_PLL_LF_SHIFT) |
> + (1 << HDMI_PLL_ODF_SHIFT);
> + else if (in_khz >= 42500)
> + val = (4 << HDMI_PLL_IDF_SHIFT) |
> + (40 << HDMI_PLL_LF_SHIFT) |
> + (2 << HDMI_PLL_ODF_SHIFT);
> + else if (in_khz >= 21250)
> + val = (2 << HDMI_PLL_IDF_SHIFT) |
> + (40 << HDMI_PLL_LF_SHIFT) |
> + (3 << HDMI_PLL_ODF_SHIFT);
> + else
> + val = (1 << HDMI_PLL_IDF_SHIFT) |
> + (40 << HDMI_PLL_LF_SHIFT) |
> + (4 << HDMI_PLL_ODF_SHIFT);
> +
> + lsdc_pipe_wreg32(ldev, LSDC_HDMI0_PHY_PLL_REG, pipe, val);
> +
> + val |= HDMI_PLL_ENABLE;
> +
> + lsdc_pipe_wreg32(ldev, LSDC_HDMI0_PHY_PLL_REG, pipe, val);
> +
> + udelay(2);
> +
> + drm_dbg(ddev, "Input frequency of HDMI-%u: %d kHz\n", pipe, in_khz);
> +
> + /* Wait hdmi phy pll lock */
> + do {
> + val = lsdc_pipe_rreg32(ldev, LSDC_HDMI0_PHY_PLL_REG, pipe);
> +
> + if (val & HDMI_PLL_LOCKED) {
> + drm_dbg(ddev, "Setting HDMI-%u PLL take %d cycles\n",
> + pipe, count);
> + break;
> + }
> + ++count;
> + } while (count < 1000);
> +
> + lsdc_pipe_wreg32(ldev, LSDC_HDMI0_PHY_CAL_REG, pipe, 0x0f000ff0);
> +
> + if (count >= 1000)
> + drm_err(ddev, "Setting HDMI-%u PLL failed\n", pipe);
> +}
> +
> +static int lsdc_hdmi_phy_set_avi_infoframe(struct drm_encoder *encoder,
> + struct drm_connector *connector,
> + struct drm_display_mode *mode,
> + unsigned int index)
> +{
> + struct drm_device *ddev = encoder->dev;
> + struct lsdc_device *ldev = to_lsdc(ddev);
> + struct hdmi_avi_infoframe infoframe;
> + u8 buffer[HDMI_INFOFRAME_SIZE(AVI)];
> + unsigned char *ptr = &buffer[HDMI_INFOFRAME_HEADER_SIZE];
> + unsigned int content0, content1, content2, content3;
> + int err;
> +
> + err = drm_hdmi_avi_infoframe_from_display_mode(&infoframe,
> + connector,
> + mode);
> + if (err < 0) {
> + drm_err(ddev, "failed to setup AVI infoframe: %d\n", err);
> + return err;
> + }
> +
> + /* Fixed infoframe configuration not linked to the mode */
> + infoframe.colorspace = HDMI_COLORSPACE_RGB;
> + infoframe.quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT;
> + infoframe.colorimetry = HDMI_COLORIMETRY_NONE;
> +
> + err = hdmi_avi_infoframe_pack(&infoframe, buffer, sizeof(buffer));
> + if (err < 0) {
> + drm_err(ddev, "failed to pack AVI infoframe: %d\n", err);
> + return err;
> + }
> +
> + content0 = *(unsigned int *)ptr;
> + content1 = *(ptr + 4);
> + content2 = *(unsigned int *)(ptr + 5);
> + content3 = *(unsigned int *)(ptr + 9);
> +
> + lsdc_pipe_wreg32(ldev, LSDC_HDMI0_AVI_CONTENT0, index, content0);
> + lsdc_pipe_wreg32(ldev, LSDC_HDMI0_AVI_CONTENT1, index, content1);
> + lsdc_pipe_wreg32(ldev, LSDC_HDMI0_AVI_CONTENT2, index, content2);
> + lsdc_pipe_wreg32(ldev, LSDC_HDMI0_AVI_CONTENT3, index, content3);
> +
> + lsdc_pipe_wreg32(ldev, LSDC_HDMI0_AVI_INFO_CRTL_REG, index,
> + AVI_PKT_ENABLE | AVI_PKT_UPDATE);
> +
> + drm_dbg(ddev, "Update HDMI-%u avi infoframe\n", index);
> +
> + return 0;
> +}
> +
> +/* Built-in HDMI encoder funcs on display pipe 0 */
> +
> +static void lsdc_pipe0_hdmi_encoder_reset(struct drm_encoder *encoder)
> +{
> + struct drm_device *ddev = encoder->dev;
> + struct lsdc_device *ldev = to_lsdc(ddev);
> + u32 val;
> +
> + val = PHY_CLOCK_POL | PHY_CLOCK_EN | PHY_DATA_EN;
> + lsdc_wreg32(ldev, LSDC_CRTC0_DVO_CONF_REG, val);
> +
> + /* Using built-in GPIO emulated I2C instead of the hardware I2C */
> + lsdc_ureg32_clr(ldev, LSDC_HDMI0_INTF_CTRL_REG, HW_I2C_EN);
> +
> + /* Help the HDMI phy get out of reset state */
> + lsdc_wreg32(ldev, LSDC_HDMI0_PHY_CTRL_REG, HDMI_PHY_RESET_N);
> +
> + drm_dbg(ddev, "%s reset\n", encoder->name);
> +
> + mdelay(20);
> +}
> +
> +const struct drm_encoder_funcs lsdc_pipe0_hdmi_encoder_funcs = {
> + .reset = lsdc_pipe0_hdmi_encoder_reset,
> + .destroy = drm_encoder_cleanup,
> +};
> +
> +/* Built-in HDMI encoder funcs on display pipe 1 */
All pipe 1 code looks like a pipe0, just the registers were changed.
Could you please refactor that to use a single instance of all
functions and pass pipe id through the data struct?
Then you can use macros to determine whether to use pipe 0 or pipe 1 register.
> +
> +static void lsdc_pipe1_hdmi_encoder_reset(struct drm_encoder *encoder)
> +{
> + struct drm_device *ddev = encoder->dev;
> + struct lsdc_device *ldev = to_lsdc(ddev);
> + u32 val;
> +
> + val = PHY_CLOCK_POL | PHY_CLOCK_EN | PHY_DATA_EN;
> + lsdc_wreg32(ldev, LSDC_CRTC1_DVO_CONF_REG, val);
> +
> + /* Using built-in GPIO emulated I2C instead of the hardware I2C */
> + lsdc_ureg32_clr(ldev, LSDC_HDMI1_INTF_CTRL_REG, HW_I2C_EN);
> +
> + /* Help the HDMI phy get out of reset state */
> + lsdc_wreg32(ldev, LSDC_HDMI1_PHY_CTRL_REG, HDMI_PHY_RESET_N);
> +
> + drm_dbg(ddev, "%s reset\n", encoder->name);
> +
> + mdelay(20);
> +}
> +
> +const struct drm_encoder_funcs lsdc_pipe1_hdmi_encoder_funcs = {
> + .reset = lsdc_pipe1_hdmi_encoder_reset,
> + .destroy = drm_encoder_cleanup,
> +};
> +
> +/* Built-in DVO encoder helper funcs */
> +
> +static void lsdc_dvo_atomic_disable(struct drm_encoder *encoder,
> + struct drm_atomic_state *state)
> +{
> +}
> +
> +static void lsdc_dvo_atomic_enable(struct drm_encoder *encoder,
> + struct drm_atomic_state *state)
> +{
> +}
> +
> +static void lsdc_dvo_atomic_modeset(struct drm_encoder *encoder,
> + struct drm_crtc_state *crtc_state,
> + struct drm_connector_state *conn_state)
> +{
> +}
You do not need these empty callbacks, do you?
> +
> +const struct drm_encoder_helper_funcs lsdc_encoder_helper_funcs = {
> + .atomic_disable = lsdc_dvo_atomic_disable,
> + .atomic_enable = lsdc_dvo_atomic_enable,
> + .atomic_mode_set = lsdc_dvo_atomic_modeset,
> +};
> +
> +/* Built-in HDMI encoder helper funcs on display pipe 0 */
> +
> +static void lsdc_pipe0_hdmi_atomic_disable(struct drm_encoder *encoder,
> + struct drm_atomic_state *state)
> +{
> + struct lsdc_device *ldev = to_lsdc(encoder->dev);
> +
> + /* Disable the HDMI PHY */
> + lsdc_ureg32_clr(ldev, LSDC_HDMI0_PHY_CTRL_REG, HDMI_PHY_EN);
> +
> + /* Disable the HDMI interface */
> + lsdc_ureg32_clr(ldev, LSDC_HDMI0_INTF_CTRL_REG, HDMI_INTERFACE_EN);
> +}
> +
> +static void lsdc_pipe0_hdmi_atomic_enable(struct drm_encoder *encoder,
> + struct drm_atomic_state *state)
> +{
> + struct lsdc_device *ldev = to_lsdc(encoder->dev);
> + u32 val;
> +
> + /* datasheet say it should larger than 48 */
> + val = 64 << HDMI_H_ZONE_IDLE_SHIFT | 64 << HDMI_V_ZONE_IDLE_SHIFT;
> + lsdc_wreg32(ldev, LSDC_HDMI0_ZONE_REG, val);
> +
> + val = HDMI_PHY_TERM_STATUS |
> + HDMI_PHY_TERM_DET_EN |
> + HDMI_PHY_TERM_H_EN |
> + HDMI_PHY_TERM_L_EN |
> + HDMI_PHY_RESET_N |
> + HDMI_PHY_EN;
> + lsdc_wreg32(ldev, LSDC_HDMI0_PHY_CTRL_REG, val);
> +
> + udelay(2);
> +
> + val = HDMI_CTL_PERIOD_MODE |
> + HDMI_AUDIO_EN |
> + HDMI_PACKET_EN |
> + HDMI_INTERFACE_EN |
> + (8 << HDMI_VIDEO_PREAMBLE_SHIFT);
> + lsdc_wreg32(ldev, LSDC_HDMI0_INTF_CTRL_REG, val);
> +}
> +
> +static void lsdc_pipe0_hdmi_atomic_modeset(struct drm_encoder *encoder,
> + struct drm_crtc_state *crtc_state,
> + struct drm_connector_state *conn_state)
> +{
> + struct lsdc_output *output = encoder_to_lsdc_output(encoder);
> + struct drm_device *ddev = encoder->dev;
> + struct drm_display_mode *mode = &crtc_state->mode;
> +
> + lsdc_hdmi_phy_pll_config(ddev, mode->clock, 0);
> +
> + lsdc_hdmi_phy_set_avi_infoframe(encoder, &output->connector, mode, 0);
> +
> + drm_dbg(ddev, "%s modeset finished\n", encoder->name);
> +}
> +
> +const struct drm_encoder_helper_funcs lsdc_pipe0_hdmi_encoder_helper_funcs = {
> + .atomic_disable = lsdc_pipe0_hdmi_atomic_disable,
> + .atomic_enable = lsdc_pipe0_hdmi_atomic_enable,
> + .atomic_mode_set = lsdc_pipe0_hdmi_atomic_modeset,
> +};
> +
> +/* Built-in HDMI encoder helper funcs on display pipe 1 */
> +
> +static void lsdc_pipe1_hdmi_atomic_disable(struct drm_encoder *encoder,
> + struct drm_atomic_state *state)
> +{
> + struct lsdc_device *ldev = to_lsdc(encoder->dev);
> +
> + /* Disable the HDMI PHY */
> + lsdc_ureg32_clr(ldev, LSDC_HDMI1_PHY_CTRL_REG, HDMI_PHY_EN);
> +
> + /* Disable the HDMI interface */
> + lsdc_ureg32_clr(ldev, LSDC_HDMI1_INTF_CTRL_REG, HDMI_INTERFACE_EN);
> +}
> +
> +static void lsdc_pipe1_hdmi_atomic_enable(struct drm_encoder *encoder,
> + struct drm_atomic_state *state)
> +{
> + struct lsdc_device *ldev = to_lsdc(encoder->dev);
> + u32 val;
> +
> + /* datasheet say it should larger than 48 */
> + val = 64 << HDMI_H_ZONE_IDLE_SHIFT | 64 << HDMI_V_ZONE_IDLE_SHIFT;
> + lsdc_wreg32(ldev, LSDC_HDMI1_ZONE_REG, val);
> +
> + val = HDMI_PHY_TERM_STATUS |
> + HDMI_PHY_TERM_DET_EN |
> + HDMI_PHY_TERM_H_EN |
> + HDMI_PHY_TERM_L_EN |
> + HDMI_PHY_RESET_N |
> + HDMI_PHY_EN;
> + lsdc_wreg32(ldev, LSDC_HDMI1_PHY_CTRL_REG, val);
> +
> + udelay(2);
> +
> + val = HDMI_CTL_PERIOD_MODE |
> + HDMI_AUDIO_EN |
> + HDMI_PACKET_EN |
> + HDMI_INTERFACE_EN |
> + (8 << HDMI_VIDEO_PREAMBLE_SHIFT);
> + lsdc_wreg32(ldev, LSDC_HDMI1_INTF_CTRL_REG, val);
> +}
> +
> +static void lsdc_pipe1_hdmi_atomic_modeset(struct drm_encoder *encoder,
> + struct drm_crtc_state *crtc_state,
> + struct drm_connector_state *conn_state)
> +{
> + struct lsdc_output *output = encoder_to_lsdc_output(encoder);
> + struct drm_device *ddev = encoder->dev;
> + struct drm_display_mode *mode = &crtc_state->mode;
> +
> + lsdc_hdmi_phy_pll_config(ddev, mode->clock, 1);
> +
> + lsdc_hdmi_phy_set_avi_infoframe(encoder, &output->connector, mode, 1);
> +
> + drm_dbg(ddev, "%s modeset finished\n", encoder->name);
> +}
> +
> +const struct drm_encoder_helper_funcs lsdc_pipe1_hdmi_encoder_helper_funcs = {
> + .atomic_disable = lsdc_pipe1_hdmi_atomic_disable,
> + .atomic_enable = lsdc_pipe1_hdmi_atomic_enable,
> + .atomic_mode_set = lsdc_pipe1_hdmi_atomic_modeset,
> +};
> +
> +int lsdc_encoder_init(struct drm_device *ddev,
> + struct lsdc_output *output,
> + unsigned int pipe)
> +{
> + const struct lsdc_output_desc *descp = output->descp;
> + struct drm_encoder *encoder = &output->encoder;
> + int ret;
> +
> + ret = drm_encoder_init(ddev,
> + encoder,
> + descp->encoder_funcs,
> + descp->encoder_type,
> + descp->name);
> + if (ret)
> + return ret;
> +
> + encoder->possible_crtcs = BIT(pipe);
> +
> + drm_encoder_helper_add(encoder, descp->encoder_helper_funcs);
> +
> + return 0;
> +}
> +
> +int lsdc_connector_init(struct drm_device *ddev,
> + struct lsdc_output *output,
> + struct i2c_adapter *ddc,
> + unsigned int pipe)
> +{
> + const struct lsdc_output_desc *descp = output->descp;
> + struct drm_connector *connector = &output->connector;
> + int ret;
> +
> + ret = drm_connector_init_with_ddc(ddev,
> + connector,
> + descp->connector_funcs,
> + descp->connector_type,
> + ddc);
> + if (ret)
> + return ret;
> +
> + drm_connector_helper_add(connector, descp->connector_helper_funcs);
> +
> + drm_connector_attach_encoder(connector, &output->encoder);
> +
> + connector->polled = DRM_CONNECTOR_POLL_CONNECT |
> + DRM_CONNECTOR_POLL_DISCONNECT;
> +
> + connector->interlace_allowed = 0;
> + connector->doublescan_allowed = 0;
> +
> + drm_info(ddev, "DisplayPipe-%u has %s\n", pipe, descp->name);
> +
> + return 0;
> +}
> +
> +/*
> + * A common, sharable subroutine for the initialization of output part.
> + * If there is external non-transparent display bridge chip on the display
> + * pipe, we will attach it. Otherwise, the output is simple, we will just
> + * initial a connector for it.
> + */
> +int lsdc_output_init(struct drm_device *ddev,
> + struct lsdc_display_pipe *dispipe,
> + struct i2c_adapter *ddc,
> + unsigned int pipe)
> +{
> + struct lsdc_output *output = &dispipe->output;
> + int ret;
> +
> + ret = lsdc_encoder_init(ddev, output, pipe);
> + if (ret)
> + return ret;
> +
> + if (output->bridge) {
> + ret = drm_bridge_attach(&output->encoder, output->bridge,
> + NULL, 0);
Since you are creating the connector manually, you should pass
DRM_BRIDGE_ATTACH_NO_CONNECTOR here.
> + if (ret) {
> + drm_err(ddev, "Attach display bridge failed\n");
> + ret = lsdc_connector_init(ddev, output, ddc, pipe);
> + }
> + } else {
> + ret = lsdc_connector_init(ddev, output, ddc, pipe);
> + }
> +
> + return ret;
> +}
> diff --git a/drivers/gpu/drm/loongson/lsdc_output.h b/drivers/gpu/drm/loongson/lsdc_output.h
> index 097789051a1d..a37a72687bdf 100644
> --- a/drivers/gpu/drm/loongson/lsdc_output.h
> +++ b/drivers/gpu/drm/loongson/lsdc_output.h
> @@ -6,16 +6,64 @@
> #ifndef __LSDC_OUTPUT_H__
> #define __LSDC_OUTPUT_H__
>
> -#include "lsdc_drv.h"
> +#include <drm/drm_bridge.h>
> +#include <drm/drm_connector.h>
> +#include <drm/drm_encoder.h>
> +
> +struct lsdc_output_desc {
> + u32 pipe;
> + u32 encoder_type;
> + u32 connector_type;
> + const struct drm_encoder_funcs *encoder_funcs;
> + const struct drm_encoder_helper_funcs *encoder_helper_funcs;
> + const struct drm_connector_funcs *connector_funcs;
> + const struct drm_connector_helper_funcs *connector_helper_funcs;
> + const char name[32];
> +};
> +
> +struct lsdc_output {
> + struct drm_encoder encoder;
> + struct drm_connector connector;
> + struct drm_bridge *bridge;
> + const struct lsdc_output_desc *descp;
> +};
> +
> +static inline struct lsdc_output *
> +connector_to_lsdc_output(struct drm_connector *connector)
> +{
> + return container_of(connector, struct lsdc_output, connector);
> +}
> +
> +static inline struct lsdc_output *
> +encoder_to_lsdc_output(struct drm_encoder *encoder)
> +{
> + return container_of(encoder, struct lsdc_output, encoder);
> +}
> +
> +extern const struct drm_connector_funcs lsdc_connector_funcs;
> +extern const struct drm_connector_funcs lsdc_pipe0_hdmi_connector_funcs;
> +extern const struct drm_connector_funcs lsdc_pipe1_hdmi_connector_funcs;
> +extern const struct drm_connector_helper_funcs lsdc_connector_helper_funcs;
> +
> +extern const struct drm_encoder_funcs lsdc_pipe0_hdmi_encoder_funcs;
> +extern const struct drm_encoder_funcs lsdc_pipe1_hdmi_encoder_funcs;
> +extern const struct drm_encoder_helper_funcs lsdc_encoder_helper_funcs;
> +extern const struct drm_encoder_helper_funcs lsdc_pipe0_hdmi_encoder_helper_funcs;
> +extern const struct drm_encoder_helper_funcs lsdc_pipe1_hdmi_encoder_helper_funcs;
>
> int ls7a1000_output_init(struct drm_device *ddev,
> struct lsdc_display_pipe *dispipe,
> struct i2c_adapter *ddc,
> unsigned int index);
>
> -int ls7a2000_output_init(struct drm_device *ldev,
> +int ls7a2000_output_init(struct drm_device *ddev,
> struct lsdc_display_pipe *dispipe,
> struct i2c_adapter *ddc,
> unsigned int index);
>
> +int lsdc_output_init(struct drm_device *ddev,
> + struct lsdc_display_pipe *dispipe,
> + struct i2c_adapter *ddc,
> + unsigned int pipe);
> +
> #endif
> --
> 2.34.1
>
--
With best wishes
Dmitry
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