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drm: meson: venc: cvbs: fix CVBS mode matching 

commit 43cb86799f upstream.

With commit 222ec1618c ("drm: Add aspect ratio parsing in DRM
layer") the drm core started honoring the picture_aspect_ratio field
when comparing two drm_display_modes. Prior to that it was ignored.
When the CVBS encoder driver was initially submitted there was no aspect
ratio check.

Switch from drm_mode_equal() to drm_mode_match() without
DRM_MODE_MATCH_ASPECT_RATIO to fix "kmscube" and X.org output using the
CVBS connector. When (for example) kmscube sets the output mode when
using the CVBS connector it passes HDMI_PICTURE_ASPECT_NONE, making the
drm_mode_equal() fail as it include the aspect ratio.

Prior to this patch kmscube reported:
  failed to set mode: Invalid argument

The CVBS mode checking in the sun4i (drivers/gpu/drm/sun4i/sun4i_tv.c
sun4i_tv_mode_to_drm_mode) and ZTE (drivers/gpu/drm/zte/zx_tvenc.c
tvenc_mode_{pal,ntsc}) drivers don't set the "picture_aspect_ratio" at
all. The Meson VPU driver does not rely on the aspect ratio for the CVBS
output so we can safely decouple it from the hdmi_picture_aspect
setting.

Cc: <stable@vger.kernel.org>
Fixes: 222ec1618c ("drm: Add aspect ratio parsing in DRM layer")
Fixes: bbbe775ec5 ("drm: Add support for Amlogic Meson Graphic Controller")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
[narmstrong: squashed with drm: meson: venc: cvbs: deduplicate the meson_cvbs_mode lookup code]
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191208171832.1064772-3-martin.blumenstingl@googlemail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Martin Blumenstingl 2019-12-08 18:18:31 +01:00 committed by Greg Kroah-Hartman
parent 21cc694b6a
commit e08c605d22
1 changed files with 27 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

48
drivers/gpu/drm/meson/meson_venc_cvbs.c
View File

@ -64,6 +64,25 @@ struct meson_cvbs_mode meson_cvbs_modes[MESON_CVBS_MODES_COUNT] = {
},
};
static const struct meson_cvbs_mode *
meson_cvbs_get_mode(const struct drm_display_mode *req_mode)
{
int i;
for (i = 0; i < MESON_CVBS_MODES_COUNT; ++i) {
struct meson_cvbs_mode *meson_mode = &meson_cvbs_modes[i];
if (drm_mode_match(req_mode, &meson_mode->mode,
DRM_MODE_MATCH_TIMINGS |
DRM_MODE_MATCH_CLOCK |
DRM_MODE_MATCH_FLAGS |
DRM_MODE_MATCH_3D_FLAGS))
return meson_mode;
}
return NULL;
}
/* Connector */
static void meson_cvbs_connector_destroy(struct drm_connector *connector)
@ -136,14 +155,8 @@ static int meson_venc_cvbs_encoder_atomic_check(struct drm_encoder *encoder,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
int i;
for (i = 0; i < MESON_CVBS_MODES_COUNT; ++i) {
struct meson_cvbs_mode *meson_mode = &meson_cvbs_modes[i];
if (drm_mode_equal(&crtc_state->mode, &meson_mode->mode))
return 0;
}
if (meson_cvbs_get_mode(&crtc_state->mode))
return 0;
return -EINVAL;
}
@ -191,24 +204,17 @@ static void meson_venc_cvbs_encoder_mode_set(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
const struct meson_cvbs_mode *meson_mode = meson_cvbs_get_mode(mode);
struct meson_venc_cvbs *meson_venc_cvbs =
encoder_to_meson_venc_cvbs(encoder);
struct meson_drm *priv = meson_venc_cvbs->priv;
int i;
for (i = 0; i < MESON_CVBS_MODES_COUNT; ++i) {
struct meson_cvbs_mode *meson_mode = &meson_cvbs_modes[i];
if (meson_mode) {
meson_venci_cvbs_mode_set(priv, meson_mode->enci);
if (drm_mode_equal(mode, &meson_mode->mode)) {
meson_venci_cvbs_mode_set(priv,
meson_mode->enci);
/* Setup 27MHz vclk2 for ENCI and VDAC */
meson_vclk_setup(priv, MESON_VCLK_TARGET_CVBS,
MESON_VCLK_CVBS, MESON_VCLK_CVBS,
MESON_VCLK_CVBS, true);
break;
}
/* Setup 27MHz vclk2 for ENCI and VDAC */
meson_vclk_setup(priv, MESON_VCLK_TARGET_CVBS, MESON_VCLK_CVBS,
MESON_VCLK_CVBS, MESON_VCLK_CVBS, true);
}
}