drm/panel: Add simple panel mode for the ARM RTSM

Having failed any attempts at a more generic solution,
I fall back to the very specific solution: define a simple
panel for the ARM RTSM emulated platforms.

I am doing this so we can convert all old users from the
previous fbdev driver to the PL111 DRM driver.

This works fine as far as I can test, provided the
device tree for RTSM AEMv8 is augmented accordingly.

Cc: Sudeep Holla <sudeep.holla@arm.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Mali DP Maintainers <malidp@foss.arm.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20181026111334.3365-1-linus.walleij@linaro.org

1 files changed, 30 insertions, 0 deletions

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 90296090340e..07d576d99475 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -2424,6 +2424,33 @@ static const struct panel_desc winstar_wf35ltiacd = {
         .bus_format = MEDIA_BUS_FMT_RGB888_1X24,
 };
 
+static const struct drm_display_mode arm_rtsm_mode[] = {
+        {
+                .clock = 65000,
+                .hdisplay = 1024,
+                .hsync_start = 1024 + 24,
+                .hsync_end = 1024 + 24 + 136,
+                .htotal = 1024 + 24 + 136 + 160,
+                .vdisplay = 768,
+                .vsync_start = 768 + 3,
+                .vsync_end = 768 + 3 + 6,
+                .vtotal = 768 + 3 + 6 + 29,
+                .vrefresh = 60,
+                .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
+        },
+};
+
+static const struct panel_desc arm_rtsm = {
+        .modes = arm_rtsm_mode,
+        .num_modes = 1,
+        .bpc = 8,
+        .size = {
+                .width = 400,
+                .height = 300,
+        },
+        .bus_format = MEDIA_BUS_FMT_RGB888_1X24,
+};
+
 static const struct of_device_id platform_of_match[] = {
         {
                 .compatible = "ampire,am-480272h3tmqw-t01h",
@@ -2432,6 +2459,9 @@ static const struct of_device_id platform_of_match[] = {
                 .compatible = "ampire,am800480r3tmqwa1h",
                 .data = &ampire_am800480r3tmqwa1h,
         }, {
+                .compatible = "arm,rtsm-display",
+                .data = &arm_rtsm,
+        }, {
                 .compatible = "auo,b101aw03",
                 .data = &auo_b101aw03,
         }, {