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drm/panel-simple: add Evervision VGG644804 panel entry

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Timings taken from the datasheet, although sometimes there are just
typical values and it's not clear if they are no min and max values or
if you must use the typical value exactly. To make things worse, there
is no back porch but only a combined sync and back porch length.

Unfortunately, there is not public datasheet. Therefore, here are the
relevant timings:
                 | min |  typ   | max |
-----------------+-----+--------+-----+
CLK frequency    |  -  | 25.175 |  -  |
HS period        |  -  |   800  |  -  |
HS pulse width   |  5  |    30  |  -  |
HS-DEN time      | 112 |   144  | 175 |
DEN pulse width  |  -  |   640  |  -  |
VS pulse width   |  1  |     3  |  5  |
VS-DEN time      |  -  |    35  |  -  |
VS period        |  -  |   525  |  -  |

Signed-off-by: Michael Walle <mwalle@kernel.org>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20231123102404.2022201-2-mwalle@kernel.org
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231123102404.2022201-2-mwalle@kernel.org
This commit is contained in:
Michael Walle 2023-11-23 11:24:04 +01:00 committed by Neil Armstrong
parent 2a5244a04e
commit 1319f2178b
1 changed files with 30 additions and 0 deletions
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30
drivers/gpu/drm/panel/panel-simple.c
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@ -2002,6 +2002,33 @@ static const struct panel_desc eink_vb3300_kca = {
.connector_type = DRM_MODE_CONNECTOR_DPI,
};
static const struct display_timing evervision_vgg644804_timing = {
.pixelclock = { 25175000, 25175000, 25175000 },
.hactive = { 640, 640, 640 },
.hfront_porch = { 16, 16, 16 },
.hback_porch = { 82, 114, 170 },
.hsync_len = { 5, 30, 30 },
.vactive = { 480, 480, 480 },
.vfront_porch = { 10, 10, 10 },
.vback_porch = { 30, 32, 34 },
.vsync_len = { 1, 3, 5 },
.flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW |
DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_PIXDATA_POSEDGE |
DISPLAY_FLAGS_SYNC_POSEDGE,
};
static const struct panel_desc evervision_vgg644804 = {
.timings = &evervision_vgg644804_timing,
.num_timings = 1,
.bpc = 8,
.size = {
.width = 115,
.height = 86,
},
.bus_format = MEDIA_BUS_FMT_RGB666_1X7X3_SPWG,
.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE,
};
static const struct display_timing evervision_vgg804821_timing = {
.pixelclock = { 27600000, 33300000, 50000000 },
.hactive = { 800, 800, 800 },
@ -4366,6 +4393,9 @@ static const struct of_device_id platform_of_match[] = {
}, {
.compatible = "eink,vb3300-kca",
.data = &eink_vb3300_kca,
}, {
.compatible = "evervision,vgg644804",
.data = &evervision_vgg644804,
}, {
.compatible = "evervision,vgg804821",
.data = &evervision_vgg804821,