Re: [PATCH 2/7] drm/rockchip/dsi: add dual mipi channel support

From: Sean Paul
Date: Tue Sep 19 2017 - 16:25:46 EST

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In reply to: Nickey Yang: "[PATCH 2/7] drm/rockchip/dsi: add dual mipi channel support"
Next in thread: Nickey Yang: "[PATCH 3/7] dt-bindings: add the rockchip,dual-channel for dw-mipi-dsi"
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On Mon, Sep 18, 2017 at 05:05:34PM +0800, Nickey Yang wrote:

Hi Nickey,
You're adding a substantial new feature to the driver. You should add a commit
message that describes what you're adding, why you're adding it, and how it is
done.

> Signed-off-by: Nickey Yang <nickey.yang@xxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 353 ++++++++++++++++++++--------
> drivers/gpu/drm/rockchip/rockchip_drm_drv.h | 1 +
> drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 2 +
> drivers/gpu/drm/rockchip/rockchip_drm_vop.h | 3 +
> 4 files changed, 257 insertions(+), 102 deletions(-)
>
> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> index 52698b7..9265b7f 100644
> --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> @@ -42,6 +42,17 @@
> #define RK3399_GRF_SOC_CON22 0x6258
> #define RK3399_GRF_DSI_MODE 0xffff0000
>
> +/* disable turndisable, forcetxstopmode, forcerxmode, enable */
> +#define RK3399_GRF_SOC_CON23 0x625c
> +#define RK3399_GRF_DSI1_MODE1 0xffff0000
> +#define RK3399_GRF_DSI1_ENABLE 0x000f000f

Please break these out into separate defines so we know which bit is
responsible for turning on/off each feature.

> +/* disable basedir and enable clk*/
> +#define RK3399_GRF_SOC_CON24 0x6260
> +#define RK3399_TXRX_MASTERSLAVEZ BIT(7)
> +#define RK3399_TXRX_ENABLECLK BIT(6)
> +#define RK3399_TXRX_BASEDIR BIT(5)
> +#define RK3399_GRF_DSI1_MODE2 0x00e00080

Same comment here.

> +
> #define DSI_VERSION 0x00
> #define DSI_PWR_UP 0x04
> #define RESET 0
> @@ -282,6 +293,12 @@ struct dw_mipi_dsi_plat_data {
> u32 grf_switch_reg;
> u32 grf_dsi0_mode;
> u32 grf_dsi0_mode_reg;
> + u32 grf_dsi1_mode;
> + u32 grf_dsi1_mode_reg1;
> + u32 dsi1_basedir;
> + u32 dsi1_masterslavez;
> + u32 dsi1_enableclk;
> + u32 grf_dsi1_mode_reg2;
> unsigned int flags;
> unsigned int max_data_lanes;
> };
> @@ -300,6 +317,12 @@ struct dw_mipi_dsi {
> struct clk *pclk;
> struct clk *phy_cfg_clk;
>
> + /* dual-channel */
> + struct dw_mipi_dsi *master;
> + struct dw_mipi_dsi *slave;
> + struct device_node *panel_node;
> + int id;
> +
> int dpms_mode;
> unsigned int lane_mbps; /* per lane */
> u32 channel;
> @@ -526,6 +549,7 @@ static int dw_mipi_dsi_get_lane_bps(struct dw_mipi_dsi *dsi,
> unsigned int target_mbps = 1000;
> unsigned int max_mbps = dptdin_map[ARRAY_SIZE(dptdin_map) - 1].max_mbps;
> int bpp;
> + int lanes = dsi->lanes;
> unsigned long best_freq = 0;
> unsigned long fvco_min, fvco_max, fin ,fout;
> unsigned int min_prediv, max_prediv;
> @@ -540,10 +564,13 @@ static int dw_mipi_dsi_get_lane_bps(struct dw_mipi_dsi *dsi,
> return bpp;
> }
>
> + if (dsi->slave || dsi->master)
> + lanes = dsi->lanes * 2;
> +
> mpclk = DIV_ROUND_UP(mode->clock, MSEC_PER_SEC);
> if (mpclk) {
> /* take 1 / 0.8, since mbps must big than bandwidth of RGB */
> - tmp = mpclk * (bpp / dsi->lanes) * 10 / 8;
> + tmp = mpclk * (bpp / lanes) * 10 / 8;
> if (tmp < max_mbps)
> target_mbps = tmp;
> else
> @@ -605,17 +632,26 @@ static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host,
> struct mipi_dsi_device *device)
> {
> struct dw_mipi_dsi *dsi = host_to_dsi(host);
> + int lanes = dsi->slave ? device->lanes / 2 : device->lanes;
>
> - if (device->lanes > dsi->pdata->max_data_lanes) {
> + if (lanes > dsi->pdata->max_data_lanes) {
> dev_err(dsi->dev, "the number of data lanes(%u) is too many\n",
> - device->lanes);
> + lanes);
> return -EINVAL;
> }
>
> - dsi->lanes = device->lanes;
> + dsi->lanes = lanes;
> dsi->channel = device->channel;
> dsi->format = device->format;
> dsi->mode_flags = device->mode_flags;
> +
> + if (dsi->slave) {
> + dsi->slave->lanes = lanes;
> + dsi->slave->channel = device->channel;
> + dsi->slave->format = device->format;
> + dsi->slave->mode_flags = device->mode_flags;
> + }
> +
> dsi->panel = of_drm_find_panel(device->dev.of_node);
> if (dsi->panel)
> return drm_panel_attach(dsi->panel, &dsi->connector);
> @@ -745,15 +781,22 @@ static ssize_t dw_mipi_dsi_host_transfer(struct mipi_dsi_host *host,
> int ret;
>
> dw_mipi_message_config(dsi, msg);
> + if (dsi->slave)
> + dw_mipi_message_config(dsi->slave, msg);
>
> switch (msg->type) {
> case MIPI_DSI_DCS_SHORT_WRITE:
> case MIPI_DSI_DCS_SHORT_WRITE_PARAM:
> case MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE:
> + case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM:
> ret = dw_mipi_dsi_dcs_short_write(dsi, msg);
> + if (dsi->slave)
> + ret = dw_mipi_dsi_dcs_short_write(dsi->slave, msg);
> break;
> case MIPI_DSI_DCS_LONG_WRITE:
> ret = dw_mipi_dsi_dcs_long_write(dsi, msg);
> + if (dsi->slave)
> + ret = dw_mipi_dsi_dcs_long_write(dsi->slave, msg);
> break;
> default:
> dev_err(dsi->dev, "unsupported message type 0x%02x\n",
> @@ -827,6 +870,64 @@ static void dw_mipi_dsi_init(struct dw_mipi_dsi *dsi)
> TX_ESC_CLK_DIVIDSION(esc_clk_division));
> }
>
> +static void rockchip_dsi_grf_config(struct dw_mipi_dsi *dsi, int vop_id)
> +{
> + const struct dw_mipi_dsi_plat_data *pdata = dsi->pdata;
> + int val = 0;
> + int ret;
> +
> + /*
> + * For the RK3399, the clk of grf must be enabled before writing grf
> + * register. And for RK3288 or other soc, this grf_clk must be NULL,
> + * the clk_prepare_enable return true directly.
> + */
> + ret = clk_prepare_enable(dsi->grf_clk);
> + if (ret) {
> + dev_err(dsi->dev, "Failed to enable grf_clk: %d\n", ret);
> + return;
> + }
> +
> + if (dsi->slave) {
> + if (vop_id)
> + val = pdata->dsi0_en_bit |
> + (pdata->dsi0_en_bit << 16) |
> + pdata->dsi1_en_bit |
> + (pdata->dsi1_en_bit << 16);
> + else
> + val = (pdata->dsi0_en_bit << 16) |
> + (pdata->dsi1_en_bit << 16);
> +
> + regmap_write(dsi->grf_regmap, pdata->grf_switch_reg, val);
> +
> + if (pdata->grf_dsi0_mode_reg)
> + regmap_write(dsi->grf_regmap, pdata->grf_dsi0_mode_reg,
> + pdata->grf_dsi0_mode);
> + if (pdata->grf_dsi1_mode_reg1)
> + regmap_write(dsi->grf_regmap, pdata->grf_dsi1_mode_reg1,
> + pdata->grf_dsi1_mode);
> + if (pdata->grf_dsi1_mode_reg2)
> + regmap_write(dsi->grf_regmap, pdata->grf_dsi1_mode_reg2,
> + RK3399_GRF_DSI1_MODE2);
> + if (pdata->grf_dsi1_mode_reg1)
> + regmap_write(dsi->grf_regmap, pdata->grf_dsi1_mode_reg1,
> + RK3399_GRF_DSI1_ENABLE);
> + } else {
> + if (vop_id)
> + val = pdata->dsi0_en_bit |
> + (pdata->dsi0_en_bit << 16);
> + else
> + val = pdata->dsi0_en_bit << 16;
> +
> + regmap_write(dsi->grf_regmap, pdata->grf_switch_reg, val);
> +
> + if (pdata->grf_dsi0_mode_reg)
> + regmap_write(dsi->grf_regmap, pdata->grf_dsi0_mode_reg,
> + pdata->grf_dsi0_mode);
> + }

You have some duplication here, how about:

val = pdata->dsi0_en_bit << 16;
if (dsi->slave)
val |= pdata->dsi1_en_bit << 16
if (vop_id) {
val |= pdata->dsi0_en_bit;
if (dsi->slave)
val |= pdata->dsi1_en_bit;
}
regmap_write(dsi->grf_regmap, pdata->grf_switch_reg, val);

if (pdata->grf_dsi0_mode_reg)
regmap_write(dsi->grf_regmap, pdata->grf_dsi0_mode_reg,
pdata->grf_dsi0_mode);

if (dsi->slave) {
if (pdata->grf_dsi1_mode_reg1)
regmap_write(dsi->grf_regmap, pdata->grf_dsi1_mode_reg1,
pdata->grf_dsi1_mode);
if (pdata->grf_dsi1_mode_reg2)
regmap_write(dsi->grf_regmap, pdata->grf_dsi1_mode_reg2,
RK3399_GRF_DSI1_MODE2);
if (pdata->grf_dsi1_mode_reg1)
regmap_write(dsi->grf_regmap, pdata->grf_dsi1_mode_reg1,
RK3399_GRF_DSI1_ENABLE);
}

> +
> + clk_disable_unprepare(dsi->grf_clk);
> +}
> +
> static void dw_mipi_dsi_dpi_config(struct dw_mipi_dsi *dsi,
> struct drm_display_mode *mode)
> {
> @@ -867,7 +968,14 @@ static void dw_mipi_dsi_packet_handler_config(struct dw_mipi_dsi *dsi)
> static void dw_mipi_dsi_video_packet_config(struct dw_mipi_dsi *dsi,
> struct drm_display_mode *mode)
> {
> - dsi_write(dsi, DSI_VID_PKT_SIZE, VID_PKT_SIZE(mode->hdisplay));
> + int pkt_size;
> +
> + if (dsi->slave || dsi->master)
> + pkt_size = VID_PKT_SIZE(mode->hdisplay / 2 + 4);

Why add 4? Please either add a comment, pull out into a well-named define, or
both :)

> + else
> + pkt_size = VID_PKT_SIZE(mode->hdisplay);
> +
> + dsi_write(dsi, DSI_VID_PKT_SIZE, pkt_size);
> }
>
> static void dw_mipi_dsi_command_mode_config(struct dw_mipi_dsi *dsi)
> @@ -971,24 +1079,24 @@ static void dw_mipi_dsi_encoder_disable(struct drm_encoder *encoder)
>
> dw_mipi_dsi_disable(dsi);
> pm_runtime_put(dsi->dev);
> +
> + if (dsi->slave) {
> + if (clk_prepare_enable(dsi->slave->pclk)) {
> + dev_err(dsi->slave->dev, "%s: Failed to enable pclk\n", __func__);

Rockchip driver has been moved to using the DRM_DEV_* log messages, please
change all instances of dev_* in the patch.

> + return;

You still need to disable_unprepare dsi->pclk as well. Consider adding a label
'out' above the disable_unprepare below and jump to it from here.

> + }
> + dw_mipi_dsi_disable(dsi->slave);
> + pm_runtime_put(dsi->slave->dev);
> + clk_disable_unprepare(dsi->slave->pclk);
> + }
> +
> clk_disable_unprepare(dsi->pclk);
> dsi->dpms_mode = DRM_MODE_DPMS_OFF;
> }
>
> -static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
> +static void dw_mipi_dsi_enable(struct dw_mipi_dsi *dsi, struct drm_display_mode *mode)
> {
> - struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
> - struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
> - const struct dw_mipi_dsi_plat_data *pdata = dsi->pdata;
> - int mux = drm_of_encoder_active_endpoint_id(dsi->dev->of_node, encoder);
> - u32 val;
> - int ret;
> -
> - ret = dw_mipi_dsi_get_lane_bps(dsi, mode);
> - if (ret < 0)
> - return;
> -
> - if (dsi->dpms_mode == DRM_MODE_DPMS_ON)
> + if (dw_mipi_dsi_get_lane_bps(dsi, mode) < 0)

Can you please log an error with the return code here? Silently failing is bound
to cause frustration.

> return;
>
> if (clk_prepare_enable(dsi->pclk)) {
> @@ -1009,43 +1117,42 @@ static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
> dw_mipi_dsi_dphy_interface_config(dsi);
> dw_mipi_dsi_clear_err(dsi);
>
> - /*
> - * For the RK3399, the clk of grf must be enabled before writing grf
> - * register. And for RK3288 or other soc, this grf_clk must be NULL,
> - * the clk_prepare_enable return true directly.
> - */
> - ret = clk_prepare_enable(dsi->grf_clk);
> - if (ret) {
> - dev_err(dsi->dev, "Failed to enable grf_clk: %d\n", ret);
> - return;
> - }
> -
> - if (pdata->grf_dsi0_mode_reg)
> - regmap_write(dsi->grf_regmap, pdata->grf_dsi0_mode_reg,
> - pdata->grf_dsi0_mode);
> -
> dw_mipi_dsi_phy_init(dsi);
> dw_mipi_dsi_wait_for_two_frames(mode);
>
> dw_mipi_dsi_set_mode(dsi, DW_MIPI_DSI_CMD_MODE);
> +}
> +
> +static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
> +{
> + struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
> + struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
> + int mux = drm_of_encoder_active_endpoint_id(dsi->dev->of_node, encoder);
> +
> + if (dsi->dpms_mode == DRM_MODE_DPMS_ON)
> + return;
> +
> + rockchip_dsi_grf_config(dsi, mux);
> + dev_dbg(dsi->dev, "vop %s output to dsi0\n", (mux) ? "LIT" : "BIG");
> +
> + dw_mipi_dsi_enable(dsi, mode);
> + if (dsi->slave)
> + dw_mipi_dsi_enable(dsi->slave, mode);
> +
> if (drm_panel_prepare(dsi->panel))
> dev_err(dsi->dev, "failed to prepare panel\n");
>
> dw_mipi_dsi_set_mode(dsi, DW_MIPI_DSI_VID_MODE);
> + if (dsi->slave)
> + dw_mipi_dsi_set_mode(dsi->slave, DW_MIPI_DSI_VID_MODE);
> +
> drm_panel_enable(dsi->panel);
>
> clk_disable_unprepare(dsi->pclk);
> + if (dsi->slave)
> + clk_disable_unprepare(dsi->slave->pclk);
>
> - if (mux)
> - val = pdata->dsi0_en_bit | (pdata->dsi0_en_bit << 16);
> - else
> - val = pdata->dsi0_en_bit << 16;
> -
> - regmap_write(dsi->grf_regmap, pdata->grf_switch_reg, val);
> - dev_dbg(dsi->dev, "vop %s output to dsi0\n", (mux) ? "LIT" : "BIG");
> dsi->dpms_mode = DRM_MODE_DPMS_ON;
> -
> - clk_disable_unprepare(dsi->grf_clk);
> }
>
> static int
> @@ -1073,6 +1180,9 @@ static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
>
> s->output_type = DRM_MODE_CONNECTOR_DSI;
>
> + if (dsi->slave)
> + s->output_flags = ROCKCHIP_OUTPUT_DSI_DUAL_CHANNEL;
> +
> return 0;
> }
>
> @@ -1178,6 +1288,12 @@ static int rockchip_mipi_parse_dt(struct dw_mipi_dsi *dsi)
> .grf_switch_reg = RK3399_GRF_SOC_CON20,
> .grf_dsi0_mode = RK3399_GRF_DSI_MODE,
> .grf_dsi0_mode_reg = RK3399_GRF_SOC_CON22,
> + .grf_dsi1_mode = RK3399_GRF_DSI1_MODE1,
> + .grf_dsi1_mode_reg1 = RK3399_GRF_SOC_CON23,
> + .dsi1_basedir = RK3399_TXRX_BASEDIR,
> + .dsi1_masterslavez = RK3399_TXRX_MASTERSLAVEZ,
> + .dsi1_enableclk = RK3399_TXRX_ENABLECLK,
> + .grf_dsi1_mode_reg2 = RK3399_GRF_SOC_CON24,
> .flags = DW_MIPI_NEEDS_PHY_CFG_CLK | DW_MIPI_NEEDS_GRF_CLK,
> .max_data_lanes = 4,
> };
> @@ -1194,17 +1310,106 @@ static int rockchip_mipi_parse_dt(struct dw_mipi_dsi *dsi)
> };
> MODULE_DEVICE_TABLE(of, dw_mipi_dsi_dt_ids);
>
> +
> +static int rockchip_dsi_dual_channel_probe(struct dw_mipi_dsi *dsi)
> +{
> + struct device_node *np;
> + struct platform_device *secondary;
> +
> + np = of_parse_phandle(dsi->dev->of_node, "rockchip,dual-channel", 0);
> + if (np) {
> + secondary = of_find_device_by_node(np);
> + dsi->slave = platform_get_drvdata(secondary);
> + of_node_put(np);
> +
> + if (!dsi->slave)
> + return -EPROBE_DEFER;
> +
> + dsi->slave->master = dsi;
> + }
> +
> + return 0;
> +}
> +
> static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
> void *data)
> {
> + struct drm_device *drm = data;
> + struct dw_mipi_dsi *dsi = dev_get_drvdata(dev);
> + int ret;
> +
> + ret = rockchip_dsi_dual_channel_probe(dsi);
> + if (ret)
> + return ret;
> +
> + ret = clk_prepare_enable(dsi->pllref_clk);
> + if (ret) {
> + dev_err(dev, "%s: Failed to enable pllref_clk\n", __func__);
> + return ret;
> + }
> +
> + pm_runtime_enable(dev);
> +
> + if (dsi->master)
> + return 0;
> +
> + ret = dw_mipi_dsi_register(drm, dsi);
> + if (ret) {
> + dev_err(dev, "Failed to register mipi_dsi: %d\n", ret);
> + goto err_pllref;
> + }
> +
> + dsi->dsi_host.ops = &dw_mipi_dsi_host_ops;
> + dsi->dsi_host.dev = dev;
> + ret = mipi_dsi_host_register(&dsi->dsi_host);
> + if (ret) {
> + dev_err(dev, "Failed to register MIPI host: %d\n", ret);
> + goto err_cleanup;
> + }
> +
> + if (!dsi->panel) {
> + ret = -EPROBE_DEFER;
> + goto err_mipi_dsi_host;
> + }
> +
> + return 0;
> +
> +err_mipi_dsi_host:
> + mipi_dsi_host_unregister(&dsi->dsi_host);
> +err_cleanup:
> + drm_encoder_cleanup(&dsi->encoder);
> + drm_connector_cleanup(&dsi->connector);
> +err_pllref:

Do you need to disable pm runtime on dev?

> + clk_disable_unprepare(dsi->pllref_clk);
> + return ret;
> +}
> +
> +static void dw_mipi_dsi_unbind(struct device *dev, struct device *master,
> + void *data)
> +{
> + struct dw_mipi_dsi *dsi = dev_get_drvdata(dev);
> +
> + mipi_dsi_host_unregister(&dsi->dsi_host);
> + pm_runtime_disable(dev);
> + if (dsi->slave)
> + pm_runtime_disable(dsi->slave->dev);
> + clk_disable_unprepare(dsi->pllref_clk);
> +}
> +
> +static const struct component_ops dw_mipi_dsi_ops = {
> + .bind = dw_mipi_dsi_bind,
> + .unbind = dw_mipi_dsi_unbind,
> +};
> +
> +static int dw_mipi_dsi_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> const struct of_device_id *of_id =
> of_match_device(dw_mipi_dsi_dt_ids, dev);
> const struct dw_mipi_dsi_plat_data *pdata = of_id->data;
> - struct platform_device *pdev = to_platform_device(dev);
> - struct reset_control *apb_rst;
> - struct drm_device *drm = data;
> struct dw_mipi_dsi *dsi;
> struct resource *res;
> + struct reset_control *apb_rst;
> int ret;
>
> dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
> @@ -1214,6 +1419,7 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
> dsi->dev = dev;
> dsi->pdata = pdata;
> dsi->dpms_mode = DRM_MODE_DPMS_OFF;
> + dev_set_drvdata(dev, dsi);
>
> ret = rockchip_mipi_parse_dt(dsi);
> if (ret)
> @@ -1288,63 +1494,6 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
> }
> }
>
> - ret = clk_prepare_enable(dsi->pllref_clk);
> - if (ret) {
> - dev_err(dev, "%s: Failed to enable pllref_clk\n", __func__);
> - return ret;
> - }
> -
> - ret = dw_mipi_dsi_register(drm, dsi);
> - if (ret) {
> - dev_err(dev, "Failed to register mipi_dsi: %d\n", ret);
> - goto err_pllref;
> - }
> -
> - pm_runtime_enable(dev);
> -
> - dsi->dsi_host.ops = &dw_mipi_dsi_host_ops;
> - dsi->dsi_host.dev = dev;
> - ret = mipi_dsi_host_register(&dsi->dsi_host);
> - if (ret) {
> - dev_err(dev, "Failed to register MIPI host: %d\n", ret);
> - goto err_cleanup;
> - }
> -
> - if (!dsi->panel) {
> - ret = -EPROBE_DEFER;
> - goto err_mipi_dsi_host;
> - }
> -
> - dev_set_drvdata(dev, dsi);
> - return 0;
> -
> -err_mipi_dsi_host:
> - mipi_dsi_host_unregister(&dsi->dsi_host);
> -err_cleanup:
> - drm_encoder_cleanup(&dsi->encoder);
> - drm_connector_cleanup(&dsi->connector);
> -err_pllref:
> - clk_disable_unprepare(dsi->pllref_clk);
> - return ret;
> -}
> -
> -static void dw_mipi_dsi_unbind(struct device *dev, struct device *master,
> - void *data)
> -{
> - struct dw_mipi_dsi *dsi = dev_get_drvdata(dev);
> -
> - mipi_dsi_host_unregister(&dsi->dsi_host);
> - pm_runtime_disable(dev);
> - clk_disable_unprepare(dsi->pllref_clk);
> -}
> -
> -static const struct component_ops dw_mipi_dsi_ops = {
> - .bind = dw_mipi_dsi_bind,
> - .unbind = dw_mipi_dsi_unbind,
> -};
> -
> -static int dw_mipi_dsi_probe(struct platform_device *pdev)
> -{
> return component_add(&pdev->dev, &dw_mipi_dsi_ops);
> }
>
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
> index c7e96b8..51ad1c2 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
> @@ -36,6 +36,7 @@ struct rockchip_crtc_state {
> struct drm_crtc_state base;
> int output_type;
> int output_mode;
> + int output_flags;
> };
> #define to_rockchip_crtc_state(s) \
> container_of(s, struct rockchip_crtc_state, base)
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> index bf9ed0e..cb40cdd 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> @@ -917,6 +917,8 @@ static void vop_crtc_atomic_enable(struct drm_crtc *crtc,
> case DRM_MODE_CONNECTOR_DSI:
> VOP_REG_SET(vop, output, mipi_pin_pol, pin_pol);
> VOP_REG_SET(vop, output, mipi_en, 1);
> + VOP_REG_SET(vop, output, mipi_dual_channel_en,
> + !!(s->output_flags & ROCKCHIP_OUTPUT_DSI_DUAL_CHANNEL));
> break;
> case DRM_MODE_CONNECTOR_DisplayPort:
> pin_pol &= ~BIT(DCLK_INVERT);
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.h b/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
> index 56bbd2e..d184531 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
> @@ -60,6 +60,7 @@ struct vop_output {
> struct vop_reg edp_en;
> struct vop_reg hdmi_en;
> struct vop_reg mipi_en;
> + struct vop_reg mipi_dual_channel_en;
> struct vop_reg rgb_en;
> };
>
> @@ -212,6 +213,8 @@ struct vop_data {
> /* for use special outface */
> #define ROCKCHIP_OUT_MODE_AAAA 15
>
> +#define ROCKCHIP_OUTPUT_DSI_DUAL_CHANNEL BIT(0)
> +
> enum alpha_mode {
> ALPHA_STRAIGHT,
> ALPHA_INVERSE,
> --
> 1.9.1
>
>

--
Sean Paul, Software Engineer, Google / Chromium OS

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