We are going to use min/max vertical refresh rate when enter/exit to the dynamic refresh rate mode ,it is known as 'freesync', enter/exit to full screen games. Right , we may have a helper function which extracts these properties and store wherever need it. But this an alternative solution with additional helper adds some code duplication into drm_edid.c since the case already present in the code: case 0x01: /* just the ranges, no formula */ Also these values are parsed during each mode enumeration.
Why I put into connector: Drm connector have already similar items from EDID: drm_tile_group ,etc... Vitaly -----Original Message-----. From: Daniel Vetter [mailto:daniel.vet...@ffwll.ch] On Behalf Of Daniel Vetter Sent: Tuesday, May 03, 2016 4:24 PM To: Prosyak, Vitaly Cc: dri-devel at lists.freedesktop.org Subject: Re: [PATCH] drm/edid : cache edid range limits in drm connector On Tue, May 03, 2016 at 11:05:24AM -0400, Vitaly Prosyak wrote: > Cache in drm connector the edid range limits properties: > min/max vertical refresh rates and max pixel clock. > It would be used when enter to drr mode. > > Signed-off-by: Vitaly Prosyak <vitaly.prosyak at amd.com> Where's the patches that will use this? It might make sense to instead have some helper functions to compute these values, so that drivers can store them wherever they want/need. But impossible to tell without the users of this stuff. -Daniel > --- > drivers/gpu/drm/drm_edid.c | 11 +++++++++++ > include/drm/drm_crtc.h | 5 +++++ > 2 files changed, 16 insertions(+) > > diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c > index 04cb487..7e49962 100644 > --- a/drivers/gpu/drm/drm_edid.c > +++ b/drivers/gpu/drm/drm_edid.c > @@ -2190,6 +2190,17 @@ do_inferred_modes(struct detailed_timing *timing, void > *c) > timing); > break; > case 0x01: /* just the ranges, no formula */ > + closure->connector->min_vfreq = range->min_vfreq; > + closure->connector->max_vfreq = range->max_vfreq; > + if (closure->edid->revision >= 4) { > + if ((range->flags & 0x03) == 0x3) > + closure->connector->min_vfreq += 255; > + if (range->flags & 0x02) > + closure->connector->max_vfreq += 255; > + } > + closure->connector->max_pixel_clock_khz = > + range_pixel_clock(closure->edid, (u8 *)timing); > + break; > default: > break; > } > diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index > c5b4b81..85fc554 100644 > --- a/include/drm/drm_crtc.h > +++ b/include/drm/drm_crtc.h > @@ -1230,6 +1230,11 @@ struct drm_connector { > uint8_t num_h_tile, num_v_tile; > uint8_t tile_h_loc, tile_v_loc; > uint16_t tile_h_size, tile_v_size; > + > + /*EDID range limits for drr*/ > + int min_vfreq ; > + int max_vfreq ; > + int max_pixel_clock_khz; > }; > > /** > -- > 1.9.1 > > _______________________________________________ > dri-devel mailing list > dri-devel at lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/dri-devel -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch
