> -----Original Message----- > From: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx> > Sent: Wednesday, July 10, 2019 8:04 PM > To: Lisovskiy, Stanislav <stanislav.lisovskiy@xxxxxxxxx>; intel- > gfx@xxxxxxxxxxxxxxxxxxxxx > Cc: Peres, Martin <martin.peres@xxxxxxxxx>; ville.syrjala@xxxxxxxxxxxxxxx; > Saarinen, Jani <jani.saarinen@xxxxxxxxx>; Nikula, Jani <jani.nikula@xxxxxxxxx>; > Kulkarni, Vandita <vandita.kulkarni@xxxxxxxxx> > Subject: Re: [PATCH] drm/i915: Fix wrong escape clock divisor init for GLK > > Op 10-07-2019 om 16:12 schreef Stanislav Lisovskiy: > > According to Bspec clock divisor registers in GeminiLake should be > > initialized by shifting 1(<<) to amount of correspondent divisor. > > While i915 was writing all this time that value as is. > > > > Surprisingly that it by accident worked, until we met some issues with > > Microtech Etab. > > > > Signed-off-by: Stanislav.Lisovskiy@xxxxxxxxx > > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=108826 > > --- > > drivers/gpu/drm/i915/display/vlv_dsi_pll.c | 4 ++-- > > 1 file changed, 2 insertions(+), 2 deletions(-) > > > > diff --git a/drivers/gpu/drm/i915/display/vlv_dsi_pll.c > > b/drivers/gpu/drm/i915/display/vlv_dsi_pll.c > > index 99cc3e2e9c2c..f016a776a39e 100644 > > --- a/drivers/gpu/drm/i915/display/vlv_dsi_pll.c > > +++ b/drivers/gpu/drm/i915/display/vlv_dsi_pll.c > > @@ -396,8 +396,8 @@ static void glk_dsi_program_esc_clock(struct > drm_device *dev, > > else > > txesc2_div = 10; > > > > - I915_WRITE(MIPIO_TXESC_CLK_DIV1, txesc1_div & > GLK_TX_ESC_CLK_DIV1_MASK); > > - I915_WRITE(MIPIO_TXESC_CLK_DIV2, txesc2_div & > GLK_TX_ESC_CLK_DIV2_MASK); > > + I915_WRITE(MIPIO_TXESC_CLK_DIV1, (1 << (txesc1_div - 1)) & > GLK_TX_ESC_CLK_DIV1_MASK); > > + I915_WRITE(MIPIO_TXESC_CLK_DIV2, (1 << (txesc2_div - 1)) & > > +GLK_TX_ESC_CLK_DIV2_MASK); > > } The code change looks good to me. With Maarten's comment fixed, Reviewed-by: Vandita Kulkarni <vandita.kulkarni@xxxxxxxxx> Regards, Vandita > > > > /* Program BXT Mipi clocks and dividers */ > > Missing a fixes tag? > > find the original commit that introduced this, then run dim fixes $commitid. > > Cheers, > > Maarten _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
