Hi Linus
Good to see more panels and work on moving from fb to drm.
Also good to use media_bus_format to signal this is a greyscale display.
On Tue, Jul 23, 2019 at 03:37:54PM +0200, Linus Walleij wrote:
> This adds support for the TI nspire panels to the simple panel
> roster. This code is based on arch/arm/mach-nspire/clcd.c.
> This includes likely the first grayscale panel supported.
>
> These panels will be used with the PL11x DRM driver.
>
> Cc: Daniel Tang <dt.tangr@xxxxxxxxx>
> Cc: Fabian Vogt <fabian@xxxxxxxxxxxxxx>
> Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
> ---
> drivers/gpu/drm/panel/panel-simple.c | 63 ++++++++++++++++++++++++++++
> 1 file changed, 63 insertions(+)
>
> diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
> index 5a93c4edf1e4..e5cfe1398a3b 100644
> --- a/drivers/gpu/drm/panel/panel-simple.c
> +++ b/drivers/gpu/drm/panel/panel-simple.c
> @@ -2761,6 +2761,63 @@ static const struct panel_desc arm_rtsm = {
> .bus_format = MEDIA_BUS_FMT_RGB888_1X24,
> };
>
> +static const struct drm_display_mode nspire_cx_lcd_mode[] = {
Please name the variables like the compatible.
So something like ti_nspire_xxxx
Relevant for all variables.
When names are adjusted make sure the entries are sorted properly.
> + {
> + .clock = 1000,
> + .hdisplay = 320,
> + .hsync_start = 320 + 50,
> + .hsync_end = 320 + 50 + 6,
> + .htotal = 320 + 50 + 6 + 38,
> + .vdisplay = 240,
> + .vsync_start = 240 + 3,
> + .vsync_end = 240 + 3 + 1,
> + .vtotal = 240 + 3 + 1 + 17,
> + .vrefresh = 60,
Can we achieve this refresh rate with a slow clock like this?
> + .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
+1 for specifying .flags.
> + },
> +};
> +
> +static const struct panel_desc nspire_cx_lcd_panel = {
> + .modes = nspire_cx_lcd_mode,
> + .num_modes = 1,
> + .bpc = 8,
> + .size = {
> + .width = 65,
> + .height = 49,
> + },
> + .bus_format = MEDIA_BUS_FMT_RGB888_1X24,
> + .bus_flags = DRM_BUS_FLAG_PIXDATA_NEGEDGE,
> +};
> +
> +static const struct drm_display_mode nspire_classic_lcd_mode[] = {
> + {
> + .clock = 1000,
> + .hdisplay = 320,
> + .hsync_start = 320 + 6,
> + .hsync_end = 320 + 6 + 6,
> + .htotal = 320 + 6 + 6 + 6,
> + .vdisplay = 240,
> + .vsync_start = 240 + 0,
> + .vsync_end = 240 + 0 + 1,
> + .vtotal = 240 + 0 + 1 + 0,
> + .vrefresh = 60,
Ditto
> + .flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC,
> + },
> +};
> +
> +static const struct panel_desc nspire_classic_lcd_panel = {
> + .modes = nspire_classic_lcd_mode,
> + .num_modes = 1,
> + /* The grayscale panel has 8 bit for the color .. Y (black) */
> + .bpc = 8,
> + .size = {
> + .width = 71,
> + .height = 53,
> + },
> + /* This is the grayscale bus format */
> + .bus_format = MEDIA_BUS_FMT_Y8_1X8,
No DRM_BUS_FLAG_PIXDATA here?
> +};
> +
> static const struct of_device_id platform_of_match[] = {
> {
> .compatible = "ampire,am-480272h3tmqw-t01h",
> @@ -2966,6 +3023,12 @@ static const struct of_device_id platform_of_match[] = {
> }, {
> .compatible = "nlt,nl192108ac18-02d",
> .data = &nlt_nl192108ac18_02d,
> + }, {
> + .compatible = "ti,nspire-cx-lcd-panel",
> + .data = &nspire_cx_lcd_panel,
> + }, {
> + .compatible = "ti,nspire-classic-lcd-panel",
> + .data = &nspire_classic_lcd_panel,
> }, {
Should be sorted after compatible.
And with fixed naming this is the same as if name is used for sorting.
> .compatible = "nvd,9128",
> .data = &nvd_9128,
Furthermore I did not see any bindings for the panels.
If they indeed are missing, then please provide bindings in the yaml
format.
Thanks,
Sam
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