On 02.05.23 03:07, Adam Ford wrote: > The blanking calculation currently uses burst_clk_rate for calculating > the settings. Since it's possible to use this in non-burst mode, it's > possible that where won't be burst_clk_rate. Instead, cache the "possible that burst_clk_rate is 0" > clock rate configured from of samsung_dsim_set_pll and use it instead. > > Signed-off-by: Adam Ford <aford173@xxxxxxxxx> Tested-by: Chen-Yu Tsai <wenst@xxxxxxxxxxxx> Maybe this patch should be squashed into patch 6/7 as otherwise burst_clk_rate could be 0 here causing bisection issues? Apart from that: Tested on Kontron BL i.MX8MM with SN65DSI84 and ADV7535 bridges. Tested-by: Frieder Schrempf <frieder.schrempf@xxxxxxxxxx> Reviewed-by: Frieder Schrempf <frieder.schrempf@xxxxxxxxxx> > --- > drivers/gpu/drm/bridge/samsung-dsim.c | 4 +++- > include/drm/bridge/samsung-dsim.h | 1 + > 2 files changed, 4 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c > index 53099461cdc2..1dc913db2cb3 100644 > --- a/drivers/gpu/drm/bridge/samsung-dsim.c > +++ b/drivers/gpu/drm/bridge/samsung-dsim.c > @@ -652,6 +652,8 @@ static unsigned long samsung_dsim_set_pll(struct samsung_dsim *dsi, > reg = samsung_dsim_read(dsi, DSIM_STATUS_REG); > } while ((reg & DSIM_PLL_STABLE) == 0); > > + dsi->hs_clock = fout; > + > return fout; > } > > @@ -960,7 +962,7 @@ static void samsung_dsim_set_display_mode(struct samsung_dsim *dsi) > u32 reg; > > if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) { > - int byte_clk_khz = dsi->burst_clk_rate / 1000 / 8; > + int byte_clk_khz = dsi->hs_clock / 1000 / 8;> int hfp = (m->hsync_start - m->hdisplay) * byte_clk_khz / m->clock; > int hbp = (m->htotal - m->hsync_end) * byte_clk_khz / m->clock; > int hsa = (m->hsync_end - m->hsync_start) * byte_clk_khz / m->clock; > diff --git a/include/drm/bridge/samsung-dsim.h b/include/drm/bridge/samsung-dsim.h > index 76ea8a1720cc..14176e6e9040 100644 > --- a/include/drm/bridge/samsung-dsim.h > +++ b/include/drm/bridge/samsung-dsim.h > @@ -94,6 +94,7 @@ struct samsung_dsim { > > u32 pll_clk_rate; > u32 burst_clk_rate; > + u32 hs_clock; > u32 esc_clk_rate; > u32 lanes; > u32 mode_flags;