From: Ville Syrjälä Date: Thu, 14 Aug 2014 22:22:04 +0000 (+0300) Subject: drm/i915: Check pixel clock in ns2501 mode_valid hook X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b07aaf8849f08b2e4c1ea1a91cae80e0c11c8d2a;p=linux-beck.git drm/i915: Check pixel clock in ns2501 mode_valid hook The vbt on my Fujitsu-Siemens Lifebook S6010 provides two 800x600 modes, 60Hz and 56Hz. The magic register values we have correspond to the 60Hz mode, and as I don't know how one would trick the VGA BIOS to set up the 56Hz mode we can't get the magic values for the orther mode. So when checking whether a mode is valid also check the pixel clock so that we filter out the 56Hz variant. Signed-off-by: Ville Syrjälä Reviewed-by: Thomas Richter Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/dvo_ns2501.c b/drivers/gpu/drm/i915/dvo_ns2501.c index 345235b12601..441630434d34 100644 --- a/drivers/gpu/drm/i915/dvo_ns2501.c +++ b/drivers/gpu/drm/i915/dvo_ns2501.c @@ -521,9 +521,9 @@ static enum drm_mode_status ns2501_mode_valid(struct intel_dvo_device *dvo, * of the panel in here so we could always accept it * by disabling the scaler. */ - if ((mode->hdisplay == 800 && mode->vdisplay == 600) || - (mode->hdisplay == 640 && mode->vdisplay == 480) || - (mode->hdisplay == 1024 && mode->vdisplay == 768)) { + if ((mode->hdisplay == 640 && mode->vdisplay == 480 && mode->clock == 25175) || + (mode->hdisplay == 800 && mode->vdisplay == 600 && mode->clock == 40000) || + (mode->hdisplay == 1024 && mode->vdisplay == 768 && mode->clock == 65000)) { return MODE_OK; } else { return MODE_ONE_SIZE; /* Is this a reasonable error? */