On 12/8/2023 8:38 AM, Dmitry Baryshkov wrote:
On Fri, 8 Dec 2023 at 18:34, Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx> wrote:
On 12/8/2023 3:54 AM, Dmitry Baryshkov wrote:
On Fri, 8 Dec 2023 at 07:07, Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx> wrote:
Reserve CDM blocks for writeback if the format of the output fb
is YUV. At the moment, the reservation is done only for writeback
but can easily be extended by relaxing the checks once other
interfaces are ready to output YUV.
changes in v2:
- use needs_cdm from topology struct
- drop fb related checks from atomic_mode_set()
It looks like this should be squashed with the patch 11. The 'unbind
CDM' doesn't really make sense without this patch. We need to allocate
it first, before touching it.
The way I was thinking was that patch just completes the
dpu_encoder_phys_cleanup() and yes it was intentionally kept ahead
because that will not kick in till hw_cdm is assigned.
Then, this patch only handles reserving/assignment of hw_cdm when needed.
That was the motivation behind this split.
It leaves a leaf code that is not used at all. There is no need to
cleanup anything if it was not allocated. Please remove the split and
squash it with allocation.
Ack. No concerns with squashing them.
Signed-off-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 27 +++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 862912727925..a576e3e62429 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -16,6 +16,7 @@
#include <drm/drm_crtc.h>
#include <drm/drm_file.h>
#include <drm/drm_probe_helper.h>
+#include <drm/drm_framebuffer.h>
#include "msm_drv.h"
#include "dpu_kms.h"
@@ -583,6 +584,7 @@ static int dpu_encoder_virt_atomic_check(
struct drm_display_mode *adj_mode;
struct msm_display_topology topology;
struct dpu_global_state *global_state;
+ struct drm_framebuffer *fb;
struct drm_dsc_config *dsc;
int i = 0;
int ret = 0;
@@ -623,6 +625,22 @@ static int dpu_encoder_virt_atomic_check(
topology = dpu_encoder_get_topology(dpu_enc, dpu_kms, adj_mode, crtc_state, dsc);
+ /*
+ * Use CDM only for writeback at the moment as other interfaces cannot handle it.
+ * if writeback itself cannot handle cdm for some reason it will fail in its atomic_check()
+ * earlier.
+ */
+ if (dpu_enc->disp_info.intf_type == INTF_WB && conn_state->writeback_job) {
+ fb = conn_state->writeback_job->fb;
+
+ if (fb && DPU_FORMAT_IS_YUV(to_dpu_format(msm_framebuffer_format(fb))))
+ topology.needs_cdm = true;
+ if (topology.needs_cdm && !dpu_enc->cur_master->hw_cdm)
+ crtc_state->mode_changed = true;
+ else if (!topology.needs_cdm && dpu_enc->cur_master->hw_cdm)
+ crtc_state->mode_changed = true;
+ }
+
/*
* Release and Allocate resources on every modeset
* Dont allocate when active is false.
@@ -1063,6 +1081,15 @@ static void dpu_encoder_virt_atomic_mode_set(struct drm_encoder *drm_enc,
dpu_enc->dsc_mask = dsc_mask;
+ if (dpu_enc->disp_info.intf_type == INTF_WB && conn_state->writeback_job) {
+ struct dpu_hw_blk *hw_cdm = NULL;
+
+ dpu_rm_get_assigned_resources(&dpu_kms->rm, global_state,
+ drm_enc->base.id, DPU_HW_BLK_CDM,
+ &hw_cdm, 1);
+ dpu_enc->cur_master->hw_cdm = hw_cdm ? to_dpu_hw_cdm(hw_cdm) : NULL;
+ }
+
cstate = to_dpu_crtc_state(crtc_state);
for (i = 0; i < num_lm; i++) {
--
2.40.1
--
With best wishes
Dmitry
