On 6/1/2022 1:04 PM, Dmitry Baryshkov wrote:
On Wed, 1 Jun 2022 at 20:38, Abhinav Kumar quic_abhinavk@quicinc.com wrote:
On 6/1/2022 2:46 AM, Dmitry Baryshkov wrote:
On Wed, 1 Jun 2022 at 01:01, Abhinav Kumar quic_abhinavk@quicinc.com wrote:
On 5/31/2022 5:18 AM, Dmitry Baryshkov wrote:
Replace magic register writes in msm_mdss_enable() with version that contains less magic and more variable names that can be traced back to the dpu_hw_catalog or the downstream dtsi files.
Signed-off-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org
drivers/gpu/drm/msm/msm_mdss.c | 79 ++++++++++++++++++++++++++++++---- 1 file changed, 71 insertions(+), 8 deletions(-)diff --git a/drivers/gpu/drm/msm/msm_mdss.c b/drivers/gpu/drm/msm/msm_mdss.c index 0454a571adf7..2a48263cd1b5 100644 --- a/drivers/gpu/drm/msm/msm_mdss.c +++ b/drivers/gpu/drm/msm/msm_mdss.c @@ -21,6 +21,7 @@ #define HW_REV 0x0 #define HW_INTR_STATUS 0x0010
+#define UBWC_DEC_HW_VERSION 0x58 #define UBWC_STATIC 0x144 #define UBWC_CTRL_2 0x150 #define UBWC_PREDICTION_MODE 0x154 @@ -132,9 +133,63 @@ static int _msm_mdss_irq_domain_add(struct msm_mdss *msm_mdss) return 0; }
+#define UBWC_1_0 0x10000000 +#define UBWC_2_0 0x20000000 +#define UBWC_3_0 0x30000000 +#define UBWC_4_0 0x40000000
+static void msm_mdss_setup_ubwc_dec_20(struct msm_mdss *msm_mdss,
u32 ubwc_static)+{
writel_relaxed(ubwc_static, msm_mdss->mmio + UBWC_STATIC);+}
+static void msm_mdss_setup_ubwc_dec_30(struct msm_mdss *msm_mdss,
unsigned int ubwc_version,u32 ubwc_swizzle,u32 highest_bank_bit,u32 macrotile_mode)+{
u32 value = (ubwc_swizzle & 0x1) |(highest_bank_bit & 0x3) << 4 |(macrotile_mode & 0x1) << 12;if (ubwc_version == UBWC_3_0)value |= BIT(10);if (ubwc_version == UBWC_1_0)value |= BIT(8);writel_relaxed(value, msm_mdss->mmio + UBWC_STATIC);+}
+static void msm_mdss_setup_ubwc_dec_40(struct msm_mdss *msm_mdss,
unsigned int ubwc_version,u32 ubwc_swizzle,u32 ubwc_static,u32 highest_bank_bit,u32 macrotile_mode)+{
u32 value = (ubwc_swizzle & 0x7) |(ubwc_static & 0x1) << 3 |(highest_bank_bit & 0x7) << 4 |(macrotile_mode & 0x1) << 12;writel_relaxed(value, msm_mdss->mmio + UBWC_STATIC);if (ubwc_version == UBWC_3_0) {writel_relaxed(1, msm_mdss->mmio + UBWC_CTRL_2);writel_relaxed(0, msm_mdss->mmio + UBWC_PREDICTION_MODE);} else {writel_relaxed(2, msm_mdss->mmio + UBWC_CTRL_2);writel_relaxed(1, msm_mdss->mmio + UBWC_PREDICTION_MODE);}+}
Is it possible to unify the above functions by having the internal ubwc_version checks?
Note, it's not the ubwc_version, it is the ubwc_dec_hw_version. And also different functions take different sets of arguments.
It seems like msm_mdss_setup_ubwc_dec_xxx can keep growing.
I have not looked into each bit programming but from the top level so feel free to correct if wrong but it seems both do write UBWC_STATIC (different values based on different UBWC versions) and write some extra registers based on version
This is what both the current code and the downstream do. See https://github.com/MiCode/Xiaomi_Kernel_OpenSource/blob/zeus-s-oss/techpack/...
Thanks for pointing to the downstream method for this,
This is exactly what i was also suggesting to do when I mentioned unifying the above functions.
So instead of having a separate function for each version why not handle all the versions in the same function like what the link you have shown does.
I wouldn't like that. The downstream uses hw_catalog to pass all possible parameters. We do not, so we'd have a whole set of artificial values.
Now that you brought that up, why cannot even upstream dpu start using catalog for ubwc settings?
/* struct dpu_mdp_cfg : MDP TOP-BLK instance info * @id: index identifying this block * @base: register base offset to mdss * @features bit mask identifying sub-blocks/features * @highest_bank_bit: UBWC parameter * @ubwc_static: ubwc static configuration * @ubwc_swizzle: ubwc default swizzle setting * @clk_ctrls clock control register definition */ struct dpu_mdp_cfg { DPU_HW_BLK_INFO; u32 highest_bank_bit; u32 ubwc_swizzle; struct dpu_clk_ctrl_reg clk_ctrls[DPU_CLK_CTRL_MAX]; };
We already do seem to have a couple of parameters. have to add the others.
That way the number of functions wont keep growing.
static int msm_mdss_enable(struct msm_mdss *msm_mdss) { int ret;
u32 hw_rev; ret = clk_bulk_prepare_enable(msm_mdss->num_clocks, msm_mdss->clocks); if (ret) {@@ -149,26 +204,34 @@ static int msm_mdss_enable(struct msm_mdss *msm_mdss) if (msm_mdss->is_mdp5) return 0;
hw_rev = readl_relaxed(msm_mdss->mmio + HW_REV);dev_info(msm_mdss->dev, "HW_REV: 0x%x\n", hw_rev);dev_info(msm_mdss->dev, "UBWC_DEC_HW_VERSION: 0x%x\n",readl_relaxed(msm_mdss->mmio + UBWC_DEC_HW_VERSION));we are already printing the HW version here
https://gitlab.freedesktop.org/drm/msm/-/blob/msm-next/drivers/gpu/drm/msm/d...
Do you want to remove that print then? May be. Let me take a look.
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