Wrong flags used for set the pixel clock & data enable polarities. Add trace for polarities of hsync, vsync, data enabled & pixel clock.
Signed-off-by: Yannick Fertré <[email protected]> --- drivers/gpu/drm/stm/ltdc.c | 23 +++++++++++++++++++---- 1 file changed, 19 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c index 808d9fb..f671abc 100644 --- a/drivers/gpu/drm/stm/ltdc.c +++ b/drivers/gpu/drm/stm/ltdc.c @@ -517,7 +517,7 @@ static void ltdc_crtc_mode_set_nofb(struct drm_crtc *crtc) struct videomode vm; u32 hsync, vsync, accum_hbp, accum_vbp, accum_act_w, accum_act_h; u32 total_width, total_height; - u32 val; + u32 val = 0; drm_display_mode_to_videomode(mode, &vm); @@ -538,7 +538,22 @@ static void ltdc_crtc_mode_set_nofb(struct drm_crtc *crtc) total_height = accum_act_h + vm.vfront_porch; /* Configures the HS, VS, DE and PC polarities. Default Active Low */ - val = 0; + if (vm.flags & DISPLAY_FLAGS_HSYNC_LOW) + DRM_DEBUG_DRIVER("Horizontal Synchronization polarity is active low"); + if (vm.flags & DISPLAY_FLAGS_HSYNC_HIGH) + DRM_DEBUG_DRIVER("Horizontal Synchronization polarity is active high"); + if (vm.flags & DISPLAY_FLAGS_VSYNC_LOW) + DRM_DEBUG_DRIVER("Vertical Synchronization polarity is active low"); + if (vm.flags & DISPLAY_FLAGS_VSYNC_HIGH) + DRM_DEBUG_DRIVER("Vertical Synchronization polarity is active high"); + if (vm.flags & DISPLAY_FLAGS_DE_LOW) + DRM_DEBUG_DRIVER("Data Enable polarity is active low"); + if (vm.flags & DISPLAY_FLAGS_DE_HIGH) + DRM_DEBUG_DRIVER("Data Enable polarity is active high"); + if (vm.flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE) + DRM_DEBUG_DRIVER("Pixel clock polarity is active low"); + if (vm.flags & DISPLAY_FLAGS_PIXDATA_POSEDGE) + DRM_DEBUG_DRIVER("Pixel clock polarity is active high"); if (vm.flags & DISPLAY_FLAGS_HSYNC_HIGH) val |= GCR_HSPOL; @@ -546,10 +561,10 @@ static void ltdc_crtc_mode_set_nofb(struct drm_crtc *crtc) if (vm.flags & DISPLAY_FLAGS_VSYNC_HIGH) val |= GCR_VSPOL; - if (vm.flags & DISPLAY_FLAGS_DE_HIGH) + if (vm.flags & DISPLAY_FLAGS_DE_LOW) val |= GCR_DEPOL; - if (vm.flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE) + if (vm.flags & DISPLAY_FLAGS_PIXDATA_POSEDGE) val |= GCR_PCPOL; reg_update_bits(ldev->regs, LTDC_GCR, -- 2.7.4 _______________________________________________ dri-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/dri-devel
