diff options
| author | Stefan Agner <stefan@agner.ch> | 2015-11-18 04:10:29 +0100 |
|---|---|---|
| committer | Stefan Agner <stefan@agner.ch> | 2016-02-26 01:13:16 +0100 |
| commit | 4bc390c6337b6c73e0b44895e0ade7212f2815bf (patch) | |
| tree | ee75b7bc82b570f8dba95791873f60b2a8cfd794 | |
| parent | drm/fsl-dcu: fix alpha blending (diff) | |
| download | linux-4bc390c6337b6c73e0b44895e0ade7212f2815bf.tar.xz linux-4bc390c6337b6c73e0b44895e0ade7212f2815bf.zip | |
drm/fsl-dcu: use mode flags for hsync/vsync polarity
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)
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Stefan Agner <stefan@agner.ch>
| -rw-r--r-- | drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c | 11 | ||||
| -rw-r--r-- | 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 62377e41745b..b36f815bd1d8 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 f88a631c43ab..2164c999052c 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 = { |