[PATCH v6 05/11] drm: add Atmel HLCDC Display Controller support
From: Boris BREZILLON <hidden>
Date: 2014-09-29 17:21:07
Also in:
dri-devel, linux-devicetree, linux-pwm, lkml
On Mon, 29 Sep 2014 16:44:18 +0200 Boris Brezillon [off-list ref] wrote:
quoted hunk
From: Boris BREZILLON <redacted> The Atmel HLCDC (HLCD Controller) IP available on some Atmel SoCs (i.e. at91sam9n12, at91sam9x5 family or sama5d3 family) provides a display controller device. This display controller supports at least one primary plane and might provide several overlays and an hardware cursor depending on the IP version. At the moment, this driver only implements an RGB connector to interface with LCD panels, but support for other kind of external devices might be added later. Signed-off-by: Boris Brezillon <redacted> Reviewed-by: Rob Clark <redacted> Tested-by: Anthony Harivel <redacted> Tested-by: Ludovic Desroches <redacted> --- drivers/gpu/drm/Kconfig | 2 + drivers/gpu/drm/Makefile | 1 + drivers/gpu/drm/atmel-hlcdc/Kconfig | 13 + drivers/gpu/drm/atmel-hlcdc/Makefile | 7 + drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c | 392 +++++++++++ drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 527 ++++++++++++++ drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h | 216 ++++++ drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_layer.c | 659 ++++++++++++++++++ drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_layer.h | 403 +++++++++++ drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c | 443 ++++++++++++ drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c | 833 +++++++++++++++++++++++ 11 files changed, 3496 insertions(+) create mode 100644 drivers/gpu/drm/atmel-hlcdc/Kconfig create mode 100644 drivers/gpu/drm/atmel-hlcdc/Makefile create mode 100644 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c create mode 100644 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c create mode 100644 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h create mode 100644 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_layer.c create mode 100644 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_layer.h create mode 100644 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c create mode 100644 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.cdiff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index b066bb3..2d97f7e 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig@@ -185,6 +185,8 @@ source "drivers/gpu/drm/cirrus/Kconfig"
[...]
+
+int atmel_hlcdc_crtc_mode_valid(struct drm_crtc *c,
+ struct drm_display_mode *mode)
+{
+ struct videomode vm;
+
+ vm.vfront_porch = mode->vsync_start - mode->vdisplay;
+ vm.vback_porch = mode->vtotal - mode->vsync_end;
+ vm.vsync_len = mode->vsync_end - mode->vsync_start;
+ vm.hfront_porch = mode->hsync_start - mode->hdisplay;
+ vm.hback_porch = mode->htotal - mode->hsync_end;
+ vm.hsync_len = mode->hsync_end - mode->hsync_start;
+
+ if (vm.hsync_len > 0x40 || vm.hsync_len < 1)
+ return MODE_HSYNC;
+
+ if (vm.vsync_len > 0x40 || vm.vsync_len < 1)
+ return MODE_VSYNC;
+
+ if (vm.vfront_porch > 0x40 || vm.hfront_porch < 1 ||
+ vm.vback_porch > 0x40 || vm.vback_porch < 0 ||
+ mode->hdisplay > 2048 || mode->hdisplay < 1)
+ return MODE_H_ILLEGAL;
+
+ if (vm.hfront_porch > 0x200 || vm.hfront_porch < 1 ||
+ vm.hback_porch > 0x200 || vm.hback_porch < 1 ||
+ mode->hdisplay > 2048 || mode->hdisplay < 1)
+ return MODE_V_ILLEGAL;
+
+ return MODE_OK;
+}
+I forgot to squash the commit removing this function which a vestige from one of my attempt to provide a common mode_valid function that can be called from the connector mode_valid function. -- Boris Brezillon, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com