Hi

Am 08.03.22 um 18:43 schrieb Jocelyn Falempe:

commit f86c3ed55920 ("drm/mgag200: Split PLL setup into compute and update functions") introduced a regression for g200wb and g200ew. The PLLs are not set up properly, and VGA screen stays black, or displays "out of range" message.

MGA1064_WB_PIX_PLLC_N/M/P was mistakenly replaced with MGA1064_PIX_PLLC_N/M/P which have different addresses.

Patch tested on a Dell T310 with g200wb

Fixes: f86c3ed55920 ("drm/mgag200: Split PLL setup into compute and update functions") Cc: stable@vger.kernel.org Signed-off-by: Jocelyn Falempe jfalempe@redhat.com

Thank you so much. I've added the patch to drm-misc-fixes. One small nit: next time, please include a little change log that says what each version of the patch changes; even if it's only the style of the commit message.

Best regards Thomas

---

drivers/gpu/drm/mgag200/mgag200_pll.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/mgag200/mgag200_pll.c b/drivers/gpu/drm/mgag200/mgag200_pll.c index e9ae22b4f813..52be08b744ad 100644 --- a/drivers/gpu/drm/mgag200/mgag200_pll.c +++ b/drivers/gpu/drm/mgag200/mgag200_pll.c @@ -404,9 +404,9 @@ mgag200_pixpll_update_g200wb(struct mgag200_pll *pixpll, const struct mgag200_pl udelay(50); /* program pixel pll register */

• WREG_DAC(MGA1064_PIX_PLLC_N, xpixpllcn);
  

• WREG_DAC(MGA1064_PIX_PLLC_M, xpixpllcm);
  

• WREG_DAC(MGA1064_PIX_PLLC_P, xpixpllcp);
  

• WREG_DAC(MGA1064_WB_PIX_PLLC_N, xpixpllcn);
  

• WREG_DAC(MGA1064_WB_PIX_PLLC_M, xpixpllcm);
  

• WREG_DAC(MGA1064_WB_PIX_PLLC_P, xpixpllcp);
  

udelay(50);