[Intel-gfx] [PATCH 1/9] drm: add helper to get crtc timings (v4)
Ander Conselvan de Oliveira
conselvan2 at gmail.com
Thu Nov 27 15:19:15 CET 2014
On 11/24/2014 09:52 PM, Matt Roper wrote:
> From: Gustavo Padovan <gustavo.padovan at collabora.co.uk>
>
> We need to get hdisplay and vdisplay in a few places so create a
> helper to make our job easier.
>
> v2 (by Matt): Use new stereo doubling function (suggested by Ville)
>
> v3 (by Matt):
> - Add missing kerneldoc (Daniel)
> - Use drm_mode_copy() (Jani)
>
> v4 (by Matt):
> - Drop stereo doubling function again; add 'stereo only' flag
> to drm_mode_set_crtcinfo() instead (Ville)
>
> Cc: dri-devel at lists.freedesktop.org
> Suggested-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Signed-off-by: Gustavo Padovan <gustavo.padovan at collabora.co.uk>
> Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
> ---
> drivers/gpu/drm/drm_crtc.c | 32 ++++++++++++++++++++++----------
> drivers/gpu/drm/drm_modes.c | 24 ++++++++++++++----------
> drivers/gpu/drm/i915/intel_display.c | 6 +++---
> include/drm/drm_crtc.h | 2 ++
> include/drm/drm_modes.h | 3 +++
> 5 files changed, 44 insertions(+), 23 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
> index 589a921..f06f1b4 100644
> --- a/drivers/gpu/drm/drm_crtc.c
> +++ b/drivers/gpu/drm/drm_crtc.c
> @@ -2499,6 +2499,27 @@ int drm_mode_set_config_internal(struct drm_mode_set *set)
> EXPORT_SYMBOL(drm_mode_set_config_internal);
>
> /**
> + * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode
> + * @mode: mode to query
> + * @hdisplay: hdisplay value to fill in
> + * @vdisplay: vdisplay value to fill in
> + *
> + * The vdisplay value will be doubled if the specified mode is a stereo mode of
> + * the appropriate layout.
> + */
> +void drm_crtc_get_hv_timing(const struct drm_display_mode *mode,
> + int *hdisplay, int *vdisplay)
> +{
> + struct drm_display_mode adjusted;
> +
> + drm_mode_copy(&adjusted, mode);
> + drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY);
> + *hdisplay = adjusted.crtc_hdisplay;
> + *vdisplay = adjusted.crtc_vdisplay;
> +}
> +EXPORT_SYMBOL(drm_crtc_get_hv_timing);
> +
> +/**
> * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the
> * CRTC viewport
> * @crtc: CRTC that framebuffer will be displayed on
> @@ -2515,16 +2536,7 @@ int drm_crtc_check_viewport(const struct drm_crtc *crtc,
> {
> int hdisplay, vdisplay;
>
> - hdisplay = mode->hdisplay;
> - vdisplay = mode->vdisplay;
> -
> - if (drm_mode_is_stereo(mode)) {
> - struct drm_display_mode adjusted = *mode;
> -
> - drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE);
> - hdisplay = adjusted.crtc_hdisplay;
> - vdisplay = adjusted.crtc_vdisplay;
> - }
> + drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay);
This changes the behavior slightly since before, for stereo modes,
dbl_scan and vscan would affect hdisplay and vdisplay. If I understand
correctly the old behavior is a bug, but it would be good to state that
the change is intentional.
>
> if (crtc->invert_dimensions)
> swap(hdisplay, vdisplay);
> diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
> index 6d8b941..fd5479b 100644
> --- a/drivers/gpu/drm/drm_modes.c
> +++ b/drivers/gpu/drm/drm_modes.c
> @@ -765,18 +765,22 @@ void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags)
> }
> }
>
> - if (p->flags & DRM_MODE_FLAG_DBLSCAN) {
> - p->crtc_vdisplay *= 2;
> - p->crtc_vsync_start *= 2;
> - p->crtc_vsync_end *= 2;
> - p->crtc_vtotal *= 2;
> + if (!(adjust_flags & CRTC_NO_DBLSCAN)) {
> + if (p->flags & DRM_MODE_FLAG_DBLSCAN) {
> + p->crtc_vdisplay *= 2;
> + p->crtc_vsync_start *= 2;
> + p->crtc_vsync_end *= 2;
> + p->crtc_vtotal *= 2;
> + }
> }
>
> - if (p->vscan > 1) {
> - p->crtc_vdisplay *= p->vscan;
> - p->crtc_vsync_start *= p->vscan;
> - p->crtc_vsync_end *= p->vscan;
> - p->crtc_vtotal *= p->vscan;
> + if (!(adjust_flags & CRTC_NO_VSCAN)) {
> + if (p->vscan > 1) {
> + p->crtc_vdisplay *= p->vscan;
> + p->crtc_vsync_start *= p->vscan;
> + p->crtc_vsync_end *= p->vscan;
> + p->crtc_vtotal *= p->vscan;
> + }
> }
>
> if (adjust_flags & CRTC_STEREO_DOUBLE) {
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index a3d2a44..b87aeab 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -10205,9 +10205,9 @@ intel_modeset_pipe_config(struct drm_crtc *crtc,
> * computation to clearly distinguish it from the adjusted mode, which
> * can be changed by the connectors in the below retry loop.
> */
> - drm_mode_set_crtcinfo(&pipe_config->requested_mode, CRTC_STEREO_DOUBLE);
> - pipe_config->pipe_src_w = pipe_config->requested_mode.crtc_hdisplay;
> - pipe_config->pipe_src_h = pipe_config->requested_mode.crtc_vdisplay;
> + drm_crtc_get_hv_timing(&pipe_config->requested_mode,
> + &pipe_config->pipe_src_w,
> + &pipe_config->pipe_src_h);
Same thing here.
> encoder_retry:
> /* Ensure the port clock defaults are reset when retrying. */
> diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> index b459e8f..6e46c5d 100644
> --- a/include/drm/drm_crtc.h
> +++ b/include/drm/drm_crtc.h
> @@ -1140,6 +1140,8 @@ extern int drm_plane_init(struct drm_device *dev,
> extern void drm_plane_cleanup(struct drm_plane *plane);
> extern unsigned int drm_plane_index(struct drm_plane *plane);
> extern void drm_plane_force_disable(struct drm_plane *plane);
> +extern void drm_crtc_get_hv_timing(const struct drm_display_mode *mode,
> + int *hdisplay, int *vdisplay);
> extern int drm_crtc_check_viewport(const struct drm_crtc *crtc,
> int x, int y,
> const struct drm_display_mode *mode,
> diff --git a/include/drm/drm_modes.h b/include/drm/drm_modes.h
> index 91d0582..8f17811 100644
> --- a/include/drm/drm_modes.h
> +++ b/include/drm/drm_modes.h
> @@ -90,6 +90,9 @@ enum drm_mode_status {
>
> #define CRTC_INTERLACE_HALVE_V (1 << 0) /* halve V values for interlacing */
> #define CRTC_STEREO_DOUBLE (1 << 1) /* adjust timings for stereo modes */
> +#define CRTC_NO_DBLSCAN (1 << 2) /* don't adjust doublescan */
> +#define CRTC_NO_VSCAN (1 << 3) /* don't adjust doublescan */
> +#define CRTC_STEREO_DOUBLE_ONLY (CRTC_NO_DBLSCAN | CRTC_NO_VSCAN)
The kernel doc of drm_mode_set_crtcinfo() has a brief explanation of
what the flags above do. I think it would be proper to update that with
the new additions.
Cheers,
Ander
>
> #define DRM_MODE_FLAG_3D_MAX DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF
>
>
More information about the Intel-gfx
mailing list