drm/panel: simple: Add support for Giantplus GPG482739QS5

This patch adds support for the GiantPlus GPG48273QS5 4.3" WQVGA TFT LCD
panel to the simple-panel driver.

This panel is connected via a parallel bus and uses both HSYNC and
VSYNC, whose lengths are unfortunately not clearly defined. The
datasheet only specifies the front- and backporch length, but the timing
diagram suggests that both sync signals should be asserted for exactly
one clock cycle.

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Thierry Reding <treding@nvidia.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 6049d245c20e..787983c3603d 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -566,6 +566,29 @@ static const struct panel_desc foxlink_fl500wvr00_a0t = {
         .bus_format = MEDIA_BUS_FMT_RGB888_1X24,
 };
 
+static const struct drm_display_mode giantplus_gpg482739qs5_mode = {
+        .clock = 9000,
+        .hdisplay = 480,
+        .hsync_start = 480 + 5,
+        .hsync_end = 480 + 5 + 1,
+        .htotal = 480 + 5 + 1 + 40,
+        .vdisplay = 272,
+        .vsync_start = 272 + 8,
+        .vsync_end = 272 + 8 + 1,
+        .vtotal = 272 + 8 + 1 + 8,
+        .vrefresh = 60,
+};
+
+static const struct panel_desc giantplus_gpg482739qs5 = {
+        .modes = &giantplus_gpg482739qs5_mode,
+        .num_modes = 1,
+        .bpc = 8,
+        .size = {
+                .width = 95,
+                .height = 54,
+        },
+};
+
 static const struct drm_display_mode hannstar_hsd070pww1_mode = {
         .clock = 71100,
         .hdisplay = 1280,
@@ -763,6 +786,9 @@ static const struct of_device_id platform_of_match[] = {
                 .compatible = "foxlink,fl500wvr00-a0t",
                 .data = &foxlink_fl500wvr00_a0t,
         }, {
+                .compatible = "giantplus,gpg482739qs5",
+                .data = &giantplus_gpg482739qs5
+        }, {
                 .compatible = "hannstar,hsd070pww1",
                 .data = &hannstar_hsd070pww1,
         }, {