parallel display for rzg2l /rzv2l (5.10 kernel)

Question

Hi Can you list supported parallel(not lvds parallel bridge) displays for kernel version 5.10 Also if possible can you provide dts entry for parallel display

hienhuynh · Answer

Hi anzal, 
 Describe display timings in devicetree when you use "compatible = "panel-simple"". 
 If you define the specific panel, you just need to describe with your code: 
 static const struct drm_display_mode giantplus_gpg482739qs5_mode = { .clock = 9000, .hdisplay = 480, .hsync_start = 480 + 8, .hsync_end = 480 + 8 + 41, .htotal = 480 + 8 + 41 + 4, .vdisplay = 272, .vsync_start = 272 + 4, .vsync_end = 272 + 4 + 10, .vtotal = 272 + 4 + 10 + 2, .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC, }; 
 static const struct panel_desc giantplus_gpg482739qs5 = { .modes = &giantplus_gpg482739qs5_mode, .num_modes = 1, .bpc = 16, .size = { .width = 95, .height = 54, }, .bus_format = MEDIA_BUS_FMT_RGB888_1X24, .bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE , }; 
 By the way, for sure, you should add the debug in probing function of both panel-simple.c and rcar_du_drv.c to know what makes probing failure.

parallel display for rzg2l /rzv2l (5.10 kernel)

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