On Thu, 2017-07-27 at 15:47 +0300, Andrey Gusakov wrote: > Fields in HTIM01 and HTIM02 regs should be even. > Recomended thresh_dly value is max_tu_symbol.
What about the VSDELAY change? This should be mentioned in the commit message. > Signed-off-by: Andrey Gusakov <[email protected]> > --- > drivers/gpu/drm/bridge/tc358767.c | 34 ++++++++++++++++++++-------------- > 1 file changed, 20 insertions(+), 14 deletions(-) > > diff --git a/drivers/gpu/drm/bridge/tc358767.c > b/drivers/gpu/drm/bridge/tc358767.c > index 4aee6178d889..c657a00af508 100644 > --- a/drivers/gpu/drm/bridge/tc358767.c > +++ b/drivers/gpu/drm/bridge/tc358767.c > @@ -659,6 +659,14 @@ static int tc_set_video_mode(struct tc_data *tc, struct > drm_display_mode *mode) > int lower_margin = mode->vsync_start - mode->vdisplay; > int vsync_len = mode->vsync_end - mode->vsync_start; > > + /* > + * Recommended maximum number of symbols transferred in a transfer unit: > + * DIV_ROUND_UP((input active video bandwidth in bytes) * tu_size, > + * (output active video bandwidth in bytes)) > + * Must be less than tu_size. > + */ > + max_tu_symbol = TU_SIZE_RECOMMENDED - 1; > + > dev_dbg(tc->dev, "set mode %dx%d\n", > mode->hdisplay, mode->vdisplay); > dev_dbg(tc->dev, "H margin %d,%d sync %d\n", > @@ -668,13 +676,18 @@ static int tc_set_video_mode(struct tc_data *tc, struct > drm_display_mode *mode) > dev_dbg(tc->dev, "total: %dx%d\n", mode->htotal, mode->vtotal); > > > - /* LCD Ctl Frame Size */ > - tc_write(VPCTRL0, (0x40 << 20) /* VSDELAY */ | > + /* > + * LCD Ctl Frame Size > + * datasheet is not clear of vsdelay in case of DPI > + * assume we do not need any delay when DPI is a source of > + * sync signals > + */ > + tc_write(VPCTRL0, (0 << 20) /* VSDELAY */ | VSDELAY is documented as the delay in pixel clocks between the time a VSYNC/HSYNC Start DSI packet is received and the time HSYNC/VSYNC is asserted in the DP output. I assume that this field is just ignored in DPI mode. > OPXLFMT_RGB888 | FRMSYNC_DISABLED | MSF_DISABLED); > - tc_write(HTIM01, (left_margin << 16) | /* H back porch */ > - (hsync_len << 0)); /* Hsync */ > - tc_write(HTIM02, (right_margin << 16) | /* H front porch */ > - (mode->hdisplay << 0)); /* width */ > + tc_write(HTIM01, (ALIGN(left_margin, 2) << 16) | /* H back porch */ > + (ALIGN(hsync_len, 2) << 0)); /* Hsync */ > + tc_write(HTIM02, (ALIGN(right_margin, 2) << 16) | /* H front porch */ > + (ALIGN(mode->hdisplay, 2) << 0)); /* width */ > tc_write(VTIM01, (upper_margin << 16) | /* V back porch */ > (vsync_len << 0)); /* Vsync */ > tc_write(VTIM02, (lower_margin << 16) | /* V front porch */ > @@ -693,7 +706,7 @@ static int tc_set_video_mode(struct tc_data *tc, struct > drm_display_mode *mode) > /* DP Main Stream Attributes */ > vid_sync_dly = hsync_len + left_margin + mode->hdisplay; > tc_write(DP0_VIDSYNCDELAY, > - (0x003e << 16) | /* thresh_dly */ > + (max_tu_symbol << 16) | /* thresh_dly */ > (vid_sync_dly << 0)); > > tc_write(DP0_TOTALVAL, (mode->vtotal << 16) | (mode->htotal)); > @@ -709,13 +722,6 @@ static int tc_set_video_mode(struct tc_data *tc, struct > drm_display_mode *mode) > tc_write(DPIPXLFMT, VS_POL_ACTIVE_LOW | HS_POL_ACTIVE_LOW | > DE_POL_ACTIVE_HIGH | SUB_CFG_TYPE_CONFIG1 | DPI_BPP_RGB888); > > - /* > - * Recommended maximum number of symbols transferred in a transfer unit: > - * DIV_ROUND_UP((input active video bandwidth in bytes) * tu_size, > - * (output active video bandwidth in bytes)) > - * Must be less than tu_size. > - */ > - max_tu_symbol = TU_SIZE_RECOMMENDED - 1; > tc_write(DP0_MISC, (max_tu_symbol << 23) | (TU_SIZE_RECOMMENDED << 16) | > BPC_8); > Otherwise, Acked-by: Philipp Zabel <[email protected]> regards Philipp _______________________________________________ dri-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/dri-devel
