Hi,
On Fri, Aug 28, 2020 at 02:13:32PM +0300, Robert Chiras (OSS) wrote:
> From: Laurentiu Palcu <laurentiu.pa...@nxp.com>
>
> DCSS needs active low VSYNC and HSYNC. Also, move the input selection in
> the probe function, as this will not change at runtime.
>
> Signed-off-by: Laurentiu Palcu <laurentiu.pa...@nxp.com>
> Signed-off-by: Robert Chiras <robert.chi...@nxp.com>
> ---
> drivers/gpu/drm/bridge/nwl-dsi.c | 24 ++++++++++++++++--------
> 1 file changed, 16 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/nwl-dsi.c
> b/drivers/gpu/drm/bridge/nwl-dsi.c
> index ac4aa0a..c30f7a8 100644
> --- a/drivers/gpu/drm/bridge/nwl-dsi.c
> +++ b/drivers/gpu/drm/bridge/nwl-dsi.c
> @@ -143,6 +143,7 @@ struct nwl_dsi {
> struct nwl_dsi_transfer *xfer;
> struct list_head valid_modes;
> u32 clk_drop_lvl;
> + bool use_dcss;
> };
>
> static const struct regmap_config nwl_dsi_regmap_config = {
> @@ -1036,16 +1037,16 @@ static int nwl_dsi_get_dphy_params(struct nwl_dsi
> *dsi,
>
> static bool nwl_dsi_bridge_mode_fixup(struct drm_bridge *bridge,
> const struct drm_display_mode *mode,
> - struct drm_display_mode *adjusted_mode)
> + struct drm_display_mode *adjusted)
why the rename?
> {
> struct nwl_dsi *dsi = bridge_to_dsi(bridge);
> struct mode_config *config;
> unsigned long pll_rate;
>
> DRM_DEV_DEBUG_DRIVER(dsi->dev, "Fixup mode:\n");
> - drm_mode_debug_printmodeline(adjusted_mode);
> + drm_mode_debug_printmodeline(adjusted);
>
> - config = nwl_dsi_mode_probe(dsi, adjusted_mode);
> + config = nwl_dsi_mode_probe(dsi, adjusted);
> if (!config)
> return false;
>
> @@ -1067,12 +1068,16 @@ static bool nwl_dsi_bridge_mode_fixup(struct
> drm_bridge *bridge,
> }
> /* Update the crtc_clock to be used by display controller */
> if (config->crtc_clock)
> - adjusted_mode->crtc_clock = config->crtc_clock / 1000;
> + adjusted->crtc_clock = config->crtc_clock / 1000;
>
> -
> - /* At least LCDIF + NWL needs active high sync */
> - adjusted_mode->flags |= (DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC);
> - adjusted_mode->flags &= ~(DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC);
> + if (!dsi->use_dcss) {
> + /* At least LCDIF + NWL needs active high sync */
> + adjusted->flags |= (DRM_MODE_FLAG_PHSYNC |
> DRM_MODE_FLAG_PVSYNC);
> + adjusted->flags &= ~(DRM_MODE_FLAG_NHSYNC |
> DRM_MODE_FLAG_NVSYNC);
> + } else {
> + adjusted->flags &= ~(DRM_MODE_FLAG_PHSYNC |
> DRM_MODE_FLAG_PVSYNC);
> + adjusted->flags |= (DRM_MODE_FLAG_NHSYNC |
> DRM_MODE_FLAG_NVSYNC);
> + }
>
> return true;
> }
> @@ -1400,6 +1405,9 @@ static int nwl_dsi_select_input(struct nwl_dsi *dsi)
> DRM_DEV_ERROR(dsi->dev, "Failed to select input: %d\n", ret);
>
> of_node_put(remote);
> +
> + dsi->use_dcss = use_dcss;
If we need to preserve it we can assign `dsi->use_dcss` directly and
drop `use_dcss`.
Cheers,
-- Guido
> +
> return ret;
> }
>
> --
> 2.7.4
>
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