On Mon, Apr 16, 2018 at 05:40:13PM -0700, Chandan Uddaraju wrote:
> For dual dsi mode, the horizontal timing needs
> to be divided by half since both the dsi controllers
> will be driving this panel. Adjust the pixel clock and
> DSI timing accordingly.
>
> Changes in V2:
> --Removed Change-Id from the commit text tags.
You ignored my feedback on v1
>
> Signed-off-by: Chandan Uddaraju <chandanu@xxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/msm/dsi/dsi.h | 1 +
> drivers/gpu/drm/msm/dsi/dsi_host.c | 17 +++++++++++++++++
> drivers/gpu/drm/msm/dsi/dsi_manager.c | 15 +++++++++++++++
> 3 files changed, 33 insertions(+)
>
> diff --git a/drivers/gpu/drm/msm/dsi/dsi.h b/drivers/gpu/drm/msm/dsi/dsi.h
> index 70d9a9a..4131b47 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi.h
> +++ b/drivers/gpu/drm/msm/dsi/dsi.h
> @@ -161,6 +161,7 @@ void msm_dsi_host_cmd_xfer_commit(struct mipi_dsi_host *host,
> u32 dma_base, u32 len);
> int msm_dsi_host_enable(struct mipi_dsi_host *host);
> int msm_dsi_host_disable(struct mipi_dsi_host *host);
> +void msm_dsi_host_adjust_timing_config(struct mipi_dsi_host *host);
> int msm_dsi_host_power_on(struct mipi_dsi_host *host,
> struct msm_dsi_phy_shared_timings *phy_shared_timings);
> int msm_dsi_host_power_off(struct mipi_dsi_host *host);
> diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
> index 7a03a94..66a21cb 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi_host.c
> +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
> @@ -2237,6 +2237,23 @@ static void msm_dsi_sfpb_config(struct msm_dsi_host *msm_host, bool enable)
> SFPB_GPREG_MASTER_PORT_EN(en));
> }
>
> +void msm_dsi_host_adjust_timing_config(struct mipi_dsi_host *host)
> +{
> + struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
> + struct drm_display_mode *mode = NULL;
> +
> + mode = msm_host->mode;
> +
> + mutex_lock(&msm_host->dev_mutex);
> + mode->htotal >>= 1;
> + mode->hdisplay >>= 1;
> + mode->hsync_start >>= 1;
> + mode->hsync_end >>= 1;
> +
> + mode->clock >>= 1;
> + mutex_unlock(&msm_host->dev_mutex);
> +}
> +
> int msm_dsi_host_power_on(struct mipi_dsi_host *host,
> struct msm_dsi_phy_shared_timings *phy_shared_timings)
> {
> diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c b/drivers/gpu/drm/msm/dsi/dsi_manager.c
> index 4cb1cb6..8ef1c3d 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi_manager.c
> +++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c
> @@ -627,6 +627,21 @@ static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge,
> msm_dsi_host_set_display_mode(host, adjusted_mode);
> if (is_dual_dsi && other_dsi)
> msm_dsi_host_set_display_mode(other_dsi->host, adjusted_mode);
> +
> + /*
> + * For dual DSI mode, the current DRM mode has
> + * the complete width of the panel. Since, the complete
> + * panel is driven by two DSI controllers, the
> + * horizontal timings and the pixel clock have to be
> + * split between the two dsi controllers. Adjust the
> + * DSI host timing structures accordingly.
> + */
> + if (is_dual_dsi) {
> + msm_dsi_host_adjust_timing_config(host);
> + if (other_dsi)
> + msm_dsi_host_adjust_timing_config(other_dsi->host);
> + }
> +
> }
>
> static const struct drm_connector_funcs dsi_mgr_connector_funcs = {
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>
--
Sean Paul, Software Engineer, Google / Chromium OS
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