[PATCH AUTOSEL 6.13 13/34] drm/msm/dpu: filter out too wide modes if no 3dmux is present

[PATCH AUTOSEL 6.13 13/34] drm/msm/dpu: filter out too wide modes if no 3dmux is present

[Sasha Levin]

From: Abhinav Kumar <quic_abhinavk@quicinc.com>

[ Upstream commit dbc7bb1a93f41c533fe31ddc97bdf777d7a61faa ]

On chipsets such as QCS615, there is no 3dmux present. In such
a case, a layer exceeding the max_mixer_width cannot be split,
hence cannot be supported.

Filter out the modes which exceed the max_mixer_width when there
is no 3dmux present. Also, add a check in the dpu_crtc_atomic_check()
to return failure for such modes.

Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Tested-by: Xiangxu Yin <quic_xiangxuy@quicinc.com> # QCS615
Patchwork: https://patchwork.freedesktop.org/patch/627974/
Link: https://lore.kernel.org/r/20241209-no_3dmux-v3-1-48aaa555b0d3@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index 9f6ffd344693e..ad3462476a143 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -732,6 +732,13 @@ static int _dpu_crtc_check_and_setup_lm_bounds(struct drm_crtc *crtc,
 	struct dpu_kms *dpu_kms = _dpu_crtc_get_kms(crtc);
 	int i;
 
+	/* if we cannot merge 2 LMs (no 3d mux) better to fail earlier
+	 * before even checking the width after the split
+	 */
+	if (!dpu_kms->catalog->caps->has_3d_merge &&
+	    adj_mode->hdisplay > dpu_kms->catalog->caps->max_mixer_width)
+		return -E2BIG;
+
 	for (i = 0; i < cstate->num_mixers; i++) {
 		struct drm_rect *r = &cstate->lm_bounds[i];
 		r->x1 = crtc_split_width * i;
@@ -1251,6 +1258,12 @@ static enum drm_mode_status dpu_crtc_mode_valid(struct drm_crtc *crtc,
 {
 	struct dpu_kms *dpu_kms = _dpu_crtc_get_kms(crtc);
 
+	/* if there is no 3d_mux block we cannot merge LMs so we cannot
+	 * split the large layer into 2 LMs, filter out such modes
+	 */
+	if (!dpu_kms->catalog->caps->has_3d_merge &&
+	    mode->hdisplay > dpu_kms->catalog->caps->max_mixer_width)
+		return MODE_BAD_HVALUE;
 	/*
 	 * max crtc width is equal to the max mixer width * 2 and max height is 4K
 	 */
-- 
2.39.5

[PATCH AUTOSEL 6.13 19/34] drm/msm/dp: use eld_mutex to protect access to connector->eld

[Sasha Levin]

From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

[ Upstream commit 9aad030dc64f6994dc5de7bb81ceca55dbc555c3 ]

Reading access to connector->eld can happen at the same time the
drm_edid_to_eld() updates the data. Take the newly added eld_mutex in
order to protect connector->eld from concurrent access.

Reviewed-by: Maxime Ripard <mripard@kernel.org>
Acked-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241206-drm-connector-eld-mutex-v2-7-c9bce1ee8bea@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/msm/dp/dp_audio.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/msm/dp/dp_audio.c b/drivers/gpu/drm/msm/dp/dp_audio.c
index 74e01a5dd4195..0fd5e0abaf078 100644
--- a/drivers/gpu/drm/msm/dp/dp_audio.c
+++ b/drivers/gpu/drm/msm/dp/dp_audio.c
@@ -414,8 +414,10 @@ static int msm_dp_audio_get_eld(struct device *dev,
 		return -ENODEV;
 	}
 
+	mutex_lock(&msm_dp_display->connector->eld_mutex);
 	memcpy(buf, msm_dp_display->connector->eld,
 		min(sizeof(msm_dp_display->connector->eld), len));
+	mutex_unlock(&msm_dp_display->connector->eld_mutex);
 
 	return 0;
 }
-- 
2.39.5