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drm/panel: vtdr6130: Use 16-bit brightness function

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This panel communicates brightness in big endian. This is not a quirk of
the panels themselves, but rather, a part of the MIPI standard. Use the
new mipi_dsi_dcs_set_display_brightness_large() function that properly
handles 16-bit brightness instead of bypassing the brightness functions
entirely.

Signed-off-by: Richard Acayan <mailingradian@gmail.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-MTP
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230116224909.23884-4-mailingradian@gmail.com
This commit is contained in:
Richard Acayan 2023-01-16 17:49:09 -05:00 committed by Neil Armstrong
parent fd40749a4f
commit 9402cde934
1 changed files with 1 additions and 4 deletions
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5
drivers/gpu/drm/panel/panel-visionox-vtdr6130.c
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@ -243,12 +243,9 @@ static int visionox_vtdr6130_bl_update_status(struct backlight_device *bl)
{
struct mipi_dsi_device *dsi = bl_get_data(bl);
u16 brightness = backlight_get_brightness(bl);
/* Panel needs big-endian order of brightness value */
u8 payload[2] = { brightness >> 8, brightness & 0xff };
int ret;
ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_BRIGHTNESS,
payload, sizeof(payload));
mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
if (ret < 0)
return ret;