On 2016-02-08 13:57, Stefan Agner wrote:
> The current default configuration is as follows:
> - Invert VSYNC signal (active LOW)
> - Invert HSYNC signal (active LOW)
>
> The mode flags allow to specify the required polarity per
> mode. Furthermore, none of the current driver settings is
> actually a standard polarity.
>
> This patch applies the current driver default polarities as
> explicit flags to the display which has been introduced with
> the driver (NEC WQVGA "nec,nl4827hc19-05b"). The driver now
> also parses the flags field and applies the configuration
> accordingly, by using the following values as standard
> polarities: (e.g. when no flags are specified):
> - VSYNC signal not inverted (active HIGH)
> - HSYNC signal not inverted (active HIGH)
>
> Signed-off-by: Stefan Agner <stefan at agner.ch>
Applied.
> ---
> drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c | 11 ++++++++---
> drivers/gpu/drm/panel/panel-simple.c | 1 +
> 2 files changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c
> b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c
> index 62377e4..b36f815 100644
> --- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c
> +++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c
> @@ -74,7 +74,7 @@ static void fsl_dcu_drm_crtc_mode_set_nofb(struct
> drm_crtc *crtc)
> struct drm_device *dev = crtc->dev;
> struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
> struct drm_display_mode *mode = &crtc->state->mode;
> - unsigned int hbp, hfp, hsw, vbp, vfp, vsw, div, index;
> + unsigned int hbp, hfp, hsw, vbp, vfp, vsw, div, index, pol = 0;
> unsigned long dcuclk;
>
> index = drm_crtc_index(crtc);
> @@ -89,6 +89,12 @@ static void fsl_dcu_drm_crtc_mode_set_nofb(struct
> drm_crtc *crtc)
> vfp = mode->vsync_start - mode->vdisplay;
> vsw = mode->vsync_end - mode->vsync_start;
>
> + if (mode->flags & DRM_MODE_FLAG_NHSYNC)
> + pol |= DCU_SYN_POL_INV_HS_LOW;
> +
> + if (mode->flags & DRM_MODE_FLAG_NVSYNC)
> + pol |= DCU_SYN_POL_INV_VS_LOW;
> +
> regmap_write(fsl_dev->regmap, DCU_HSYN_PARA,
> DCU_HSYN_PARA_BP(hbp) |
> DCU_HSYN_PARA_PW(hsw) |
> @@ -101,8 +107,7 @@ static void fsl_dcu_drm_crtc_mode_set_nofb(struct
> drm_crtc *crtc)
> DCU_DISP_SIZE_DELTA_Y(mode->vdisplay) |
> DCU_DISP_SIZE_DELTA_X(mode->hdisplay));
> regmap_write(fsl_dev->regmap, DCU_DIV_RATIO, div);
> - regmap_write(fsl_dev->regmap, DCU_SYN_POL,
> - DCU_SYN_POL_INV_VS_LOW | DCU_SYN_POL_INV_HS_LOW);
> + regmap_write(fsl_dev->regmap, DCU_SYN_POL, pol);
> regmap_write(fsl_dev->regmap, DCU_BGND, DCU_BGND_R(0) |
> DCU_BGND_G(0) | DCU_BGND_B(0));
> regmap_write(fsl_dev->regmap, DCU_DCU_MODE,
> diff --git a/drivers/gpu/drm/panel/panel-simple.c
> b/drivers/gpu/drm/panel/panel-simple.c
> index f88a631..2164c99 100644
> --- a/drivers/gpu/drm/panel/panel-simple.c
> +++ b/drivers/gpu/drm/panel/panel-simple.c
> @@ -1016,6 +1016,7 @@ static const struct drm_display_mode
> nec_nl4827hc19_05b_mode = {
> .vsync_end = 272 + 2 + 4,
> .vtotal = 272 + 2 + 4 + 2,
> .vrefresh = 74,
> + .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
> };
>
> static const struct panel_desc nec_nl4827hc19_05b = {
